JP5008599B2 - Paving body edge compaction device - Google Patents

Description

  The present invention relates to an apparatus for leveling and compacting an asphalt mixture or the like when paving a pavement such as a road, a parking lot, and a sports facility.

  For example, when asphalt mixture is spread and compacted on the road, the pavement body is paved with a formwork so that the side edges of the pavement will not collapse, and a compaction device is provided. The asphalt finisher is used for leveling and compacting. This wooden formwork is a consumable to be removed after construction, and it takes labor and time to install and remove it. Therefore, it is a formless formwork that does not use a formwork from the viewpoint of resource waste reduction and cost reduction. You should be able to carry out the construction. In order to execute this formless frame construction, a paving body end compacting device to be attached to a screed of an asphalt finisher as in Patent Document 1 has been proposed.

  The pavement end compaction device of the prior art has an end plate that protrudes downward from the lower surface of the screed to the side of the screed and abuts the lower layer of the pavement (that is, the roadbed or base layer if it is a road). It is a mechanism that extends in the front-rear direction and uses it as a substitute for the formwork to form the side edge of the pavement. In addition, a plate-like end compaction screed that vibrates up and down by, for example, a motor vibration means and compacts the end of the pavement is provided inside the end plate.

JP-A-5-195510

  In the above-mentioned pavement end compaction device of the prior art, a curved end plate is used so as to cope with the case of forming a pavement at a curved portion (see FIG. 19), or the end plate is folded halfway. The angle of the screed for end compaction can be adjusted outward (Reference Document 20).

  However, in the case of the curved end plate disclosed in FIG. 19 of Patent Document 1, the end compaction screed and the end plate must be replaced for each curvature of the curve, and the end tightening having various curvature shapes is required. It is impractical to prepare the screed for hardening and the end plate and replace them every time the curvature changes, from the viewpoint of cost and workability. Therefore, it is desired to adopt the folding end plate disclosed in FIG. 20 of Patent Document 1. In this folding type, the end compaction screed and the end plate are rotated inwardly opposite to the illustration. It cannot be moved. That is, there exists a malfunction that it cannot be bent inward corresponding to the outer peripheral side edge part of a pavement.

  As described above, the conventional paving body end compaction apparatus can be applied to the inner peripheral side edge forming of the pavement, but is difficult to apply to the outer peripheral side edge. In particular, if the end compaction screed cannot be arranged and adjusted together with the end plate in accordance with the curvatures of the inner and outer peripheries, the finishing accuracy of the side edge portion of the pavement is deteriorated, resulting in an effect such as mold deformation.

  This invention considers such a technical background, and proposes the paving body edge compaction apparatus which can finish a side edge part accurately in both the inner periphery and outer periphery of a pavement in a curve location.

  The paving body end compaction device proposed in the present invention is disposed on the side of a screed that spreads and compacts the paving material rolled up on the lower layer, extends in the traveling direction, and extends under the screed. It is arranged to be able to swing left and right by pivoting the front part behind the end plate that protrudes further downward and abuts the lower layer and forms the side edge of the pavement, and the end of the screed. An end compaction screed that vibrates up and down and compacts the end of the pavement, and is arranged on the side of the end compaction screed so as to be swingable together with the end compaction screed. An end plate for end compaction that extends in the advancing direction and protrudes downward from the lower surface of the end compaction screed to abut against the lower layer and forms the side edge of the pavement, and toward the inside of the pavement To secure the end compaction screed Configured to include a biasing means for energizing, the.

  The paving body end compaction device according to this proposal has a structure in which the end compaction screed and the end plate swing left and right around the front part, and the end compaction screed and end plate. However, it is biased toward the inside of the pavement by the biasing means. In other words, the end compaction screed and the end plate that can be swung are always urged inward so that the end compaction end plate moves while stroking the side edge of the pavement. Accordingly, the end compaction screed and the end plate advance while automatically swinging along the pavement side edge shape such as curvature.

  In other words, according to the pavement end compaction device, the end compaction screed and end plate are inward or outward depending on the curved shape of the pavement formed by the main screed and end plate at the front. The angle is automatically adjusted toward the direction, and the paved end is compacted along the curve. Therefore, the paving body end compaction device according to this proposal can finish the side edges with high accuracy both at the inner periphery and the outer periphery of the paving body at the curved portion.

  Hereinafter, preferred embodiments will be described. The paving body end compaction device according to this embodiment can be used in combination with an end plate disclosed in Japanese Patent Application Laid-Open No. 2007-303222 or an end plate disclosed in Japanese Patent Application Laid-Open No. 2008-038450. it can. In the present embodiment, an example of use with an end plate disclosed in JP 2007-303222 A is shown.

  Japanese Patent Application Laid-Open No. 2007-303222 discloses an end plate disposed on the side of a screed, a shoulder part molding plate disposed between the end plate and the screed, and a screed end behind the end plate. A paving body end compaction device comprising an end compaction plate disposed on the surface. In this embodiment, the end compaction screed and the end plate proposed in the present invention are additionally provided in the paving body end compaction device described in JP-A-2007-303222.

  Although not shown, the asphalt finisher according to this embodiment includes a hopper and a hopper gate for storing an asphalt mixture that is a paving material in front of a tractor that is a self-propelled vehicle, and a feeder for sending the asphalt mixture from the hopper gate. And a conveyor. And, behind the tractor, a screw conveyor for sending the asphalt mixture sprinkled from the hopper gate onto the lower layer (for example, roadbed or base layer) in the lateral direction (left-right direction) with respect to the traveling direction (front-rear direction), A screed S for leveling and compacting the asphalt mixture spread in the lateral direction by the screw conveyor is provided (see FIG. 4).

  The screed S can be adjusted in width by sliding in the lateral direction with respect to the first screed S3 and the screed S3 at the lower part of the frame S2 whose height can be adjusted by the leveling arm S1 swingable in the vertical direction. The second screed S4 as described above is attached to each other by shifting in the forward and backward directions and by supporting members. These width-adjustable screeds S3 and S4 play a role of pressing, leveling and compacting the asphalt mixture spread by the screw conveyor. In the case of this example, an extension screed S5 is further connected to the side portion of the screed S4 that can be slid according to the construction width, thereby constituting a screed end. Then, an end extending in the advancing direction so as to protrude downward from the lower surface of the screeds S3, S4, S5 and contact the lower layer sidewardly of the extension screed S5 and to form the pavement side edge portion substantially vertically. Plate E (symbol 10 in the publication) is arranged as an end compaction device.

  The screeds S3, S4, and S5 of this example are mechanisms that are pressed downward by hydraulic pressure or the like to press the asphalt mixture, and spread and compact. There is also a screed and either can be applied.

  The end plate E is attached to a support frame F fixed by bolts on the side surface of the main screed S so as to be urged downward by an urging cylinder (see Japanese Patent Application Laid-Open No. 2007-303222). Thus, the end plate E disposed on the side of the screed S is extended in the advancing direction of the screed S and protrudes downward from the lower surface of the screed. The end plate E that is urged downward and protrudes can move up and down following the surface state of the lower layer such as irregularities while contacting the lower layer, and is always in contact with the lower layer instead of the conventional formwork. Can be maintained. The end plate E has a flange portion E1 whose lower end portion is bent outward at a substantially right angle, and the lower surface of the flange portion E1 contacts the lower layer. Moreover, the cylinder part is extended so that the upper surface of this flange part E1 may be covered, A hot air is sent in into the said cylinder part with the burner E2 (only shown in FIG. 1) so that it can heat.

  On the back side (inner side) of the support frame F that supports the end plate E, a shoulder portion molding template is attached so that the height position can be adjusted. This shoulder portion molding template has a corner portion on the front side, and a triangular pyramid portion is formed on the rear side (see JP 2007-303222 A). The triangular pyramid portion has a tapered surface provided continuously on the rear side in the traveling direction so as to gradually chamfer the shoulder portion of the pavement side edge portion formed into a square shape by the entering corner portion. Furthermore, a cylinder part is extended so that the upper surface of an entrance corner part and a triangular pyramid part may be covered, A hot air can be sent in this cylinder part with a burner, and it can heat now.

  As shown in FIGS. 1 to 3, in this embodiment, a U-shaped support frame F is extended rearward from the screed, and a hinge H is provided at the tip of the extended support frame F. Yes. The hinge H in the form of a hinge has a vertical axis H3 on the end compaction screed 1 side between two vertical cylinders H1 and H2 on the support frame F side, and the hinge axis H4 is shared. Pierced through. By means of the hinge H, the end compaction screed 1 is pivotally mounted at the front end thereof and is disposed behind the end of the screed so that it can swing in the left-right direction.

  The end compaction screed 1 of the present embodiment is attached so as to be able to swing in the vertical direction by a horizontal shaft cylinder 1a fixed to the hinge H and a horizontal shaft 1b inserted therethrough. A long hole 1c in the circumferential direction is formed in the horizontal shaft cylinder 1a, and a pin 1d protruding from the horizontal shaft 1b is inserted into the long hole 1c so that the length of the long hole 1c is within the range. Swing is allowed only at. Support arms 1e and 1f are fixed to both ends of the horizontal shaft 1b, and a top frame 1g is fixed to the support arms 1e and 1f.

  From the top frame 1g, as shown in FIG. 3, two front and rear suspension chains 1h, 1i, 1j (1h is not shown in the figure, and in the other figures, the chains are not shown in the other figures for the sake of clarity). ) Is suspended, and the vibration plate 10 having a slanted lower surface whose front and rear ends are warped upward is suspended by the chains 1h, 1i, and 1j. A vibration means 12 using a hydraulic motor is installed on the upper surface plate 11 of the vibration plate 10 to which the chains 1h, 1i, and 1j are connected, and a bracket 13 provided at the front end of the vibration means 12 is provided. The bracket 1k is pivotally supported by a vertically long hole suspended from the top frame 1g. In FIG. 2, the vibrating means 12 is shown through the top frame 1g. The vibration plate 10 vibrates up and down by the vibration means 12 installed in this manner, and the pavement end portion is compacted by the lower surface of the vibration plate 10. As with the end plate E, a burner 14 for sending hot air may be provided on the vibration plate 10 (shown only in FIG. 1).

  At the side of the end compaction screed 1 having such a structure, an end compaction end plate 20 extending in the traveling direction is disposed. The end compaction end plate 20 is held so as to move up and down through the upper and lower through holes 22 of the holding square 21 longer than the end plate 20. Projection pieces 20a and 20b are formed on the upper end of the end compacting end plate 20 forward and backward, respectively, and are longer than the upper and lower through-holes 22 and are prevented from falling off. The holding square member 21 is fixed to support columns 23 and 24 suspended from the side end of the top plate frame 1g with an interval in the front-rear direction. Therefore, the end compaction end plate 20 swings together with the end compaction screed 1, projects downward from the lower surface of the vibration plate 10, contacts the lower layer, and forms the pavement side edge. In addition, fixation to the top-plate frame 1g of the support | pillars 23 and 24 is reinforced by providing flange 23a, 24a inside.

  An inclined surface portion 25 for chamfering the shoulder portion of the pavement side edge portion is extended in the front-rear direction on the inner surface upper portion of the end compaction end plate 20 in the present embodiment. That is, in the case of the present embodiment, as described above, the shoulder portion of the pavement side edge portion is chamfered and formed by the shoulder portion molding template attached to the main end plate E, so that the inclined surface portion 25 is formed in accordance with the shape. Provided. The front end portion of the inclined surface portion 25 warps upward like a ski.

  As shown in FIG. 4, the end compaction screed 1 is urged by the urging means 30 toward the inside of the screed, that is, toward the inside of the pavement. The urging means 30 uses a brace material 31 for steel construction, and the brace material 31 can be adjusted in length by a central turn buckle 32. One end of the brace material 31 is locked to a board 33 provided at the rear of the center portion of the screed, and a coil spring 34 is connected to the other end of the brace material 31 so that the coil spring 34 is connected to the top frame 1g. It is locked to. This urging means 30 can adjust the urging force applied to the end compaction screed 1 by rotating the central turnbuckle 32. Alternatively, the urging force can be adjusted by replacing the coil spring 34.

  Since the end compaction screed 1 is urged toward the inside of the pavement by the urging means 30, a force in the direction of pressing the end compaction end plate 20 against the pavement side edge is applied. Working all the time. As a result, the end compaction end plate 20 advances along the shape while stroking the pavement side edge, so that the end compaction screed 1 and the end plate 20 automatically follow the pavement side edge shape such as curvature. Move forward while swinging. That is, the angle of the end compaction screed 1 and the end plate 20 is automatically adjusted inward or outward in accordance with the curved shape of the pavement formed by the main screed and end plate E in front. Then, the paved body edge is compacted along the curve. Since the end compaction screed 1 and the end plate 20 are pivoted inward and outward by the hinge H to adjust the angle, the inner periphery of the pavement at the curved portion is the outer periphery. In both cases, the side edge can be finished with high accuracy.

The side view which showed embodiment of the paving body edge part compaction apparatus. The top view which showed embodiment of the paving body edge part compaction apparatus. The rear view which showed embodiment of the pavement body edge part compaction apparatus. The top view of the paving body edge part compaction apparatus which showed the attachment form of the biasing means.

Explanation of symbols

H Hinge 1 End compaction screed 1g Top plate frame 10 Vibrating plate 11 Upper surface plate 12 Excitation means 20 End compaction end plate 21 Holding squares 23, 24 Posts 25 Inclined surface 30 Energizing means

Claims (2)

Located on the side of the screed that spreads and compacts the pavement material rolled up on the lower layer, extends in the direction of travel, protrudes downward from the lower surface of the screed, contacts the lower layer, and the pavement side An end plate that molds the edge;
A screed for end compaction, which is arranged behind the end of the screed so as to be swingable in the left-right direction by pivotally attaching the front, and vibrates up and down to compact the paved end.
The end compaction screed is disposed on the side of the end compaction screed so as to be swingable together with the end compaction screed, and extends in the advancing direction and protrudes downward from the lower surface of the end compaction screed. End plate for abutting the lower layer and forming the side edge of the pavement,
A biasing means for biasing the end compaction screed toward the inside of the pavement;
A paving body end compaction device comprising:   2. The paving body end compaction device according to claim 1, wherein the end compacting end plate has an inclined surface portion for chamfering a shoulder portion of a pavement side edge portion on an inner surface.

Images