JP2008291443A - Screed apparatus of paving construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screed apparatus of a paving construction machine. <P>SOLUTION: Between a set of one side part and the other side part of a main screed 21 and a set of one side and the other side expansible screeds 22, 23, support mechanisms 24, 25 are disposed and supported to move the expansible screeds 22, 23 respectively in the width direction. One support mechanism 24 is located between one side part of the main screed 21 and one side expansible screed 22, and provided with a step adjusting part 28 on one side for moving and adjusting one side expansible screed 22 in the direction of height to the main screed 21. The other side support mechanism 25 is located between the other side part of the main screed 21 and the other side expansible screed 23, and provided with a step adjusting part 30 on the other side for moving and adjusting the other side expansible screed 23 in the direction of height through a support 29 integrated with the main screed 21, which is disposed close to the other side expansible screed 23 side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a screed device for a construction machine for pavement, in which a telescoping screed is movably provided in a widening direction from a main screed.

  The main main screed pulled by the vehicle body, the one-side telescoping screed provided so as to be movable in the widening direction from one side end of the main screed, and provided in the widening direction from the other side end of the main screed. The other-side telescoping screed, and the one-side and other-side support mechanisms for supporting the one-side and other-side telescoping screed between the one-side portion of the main screed and the other-side portion and the one-side and other-side telescoping screed There is known a screed device for a construction machine for paving equipped with (for example, see Patent Document 1).

In this screed device, a step adjustment portion (lifting means) for moving and adjusting the one side and the other side of the main screed in the height direction is placed at a fixed position on one side end and the other side end of the main screed. It is installed.
Japanese Patent No. 3383908 (page 4, Fig. 1-2)

  In the conventional screed device, since the step adjustment parts (lifting means) on one side and the other side are both installed on the main screed side, the one provided between the main screed and the telescoping screed on one side and the other side respectively. Since the lengths of the support support portions on the side and the other side are different and the support support portion on the telescoping screed side located at the rear is longer, an excessive load moment acts on the step adjustment portion on the same side. For this reason, it is necessary to ensure sufficient strength of the step adjustment portion on one side, and it is not possible to share parts.

  The present invention has been made in view of such points, and the load moment acting on the step adjustment portion that moves and adjusts one side and the other side of the main screed in the height direction can be made the same. An object of the present invention is to provide a screed device for a construction machine for paving, which can share a step adjustment part on one side and the other side.

  According to the first aspect of the present invention, there is provided a main screed, a one-side expansion / contraction screed provided to be movable in a widening direction from one side end of the main screed on the rear side in the traveling direction of the main screed, and one-side expansion / contraction The main screed is located between the other side of the main screed and the one side of the main screed and the one side of the main screed. The main screed is located between the one side support mechanism provided with a step adjustment part on one side for adjusting the movement of the one side expansion / contraction screed in the height direction, and the other side of the main screed and the expansion screed on the other side. For the pavement provided with a support mechanism on the other side in which a step adjustment part on the other side for adjusting the movement of the other side of the screed screed in the height direction is arranged on the other side of the screed screed side. Construction machinery It is a Creed apparatus.

  The invention described in claim 2 is the main frame structure in which the support in the screed device of the construction machine for paving described in claim 1 is integrated with the main screed.

  According to the first aspect of the present invention, the support mechanism on the other side moves the telescoping screed on the other side in the height direction via the support integrated with the main screed. Since the other side step adjustment part to be adjusted is arranged on the other extension screed side, that is, both the one side and the other side support mechanisms are arranged close to each extension screed immediately before each extension screed. The load moment acting on the step adjustment part on the side and the other side can be made the same, in other words, conventionally, there is a long support structure between the step adjustment part on the main screed side and the telescoping screed. A large load moment is acting on the step adjustment part on the main screed side, but the step adjustment part on one side and the other side is placed close to the expansion and contraction screed on one side and the other side. Side step adjustment The same force can be applied to both sides, so that the step adjustment parts on both sides can be made common, and one of the step adjustment parts can be strengthened via a support integrated with the main screed. It can suppress that a difference generate | occur | produces in the deformation amount of the expansion-contraction screed of both sides by the pressure from a compound material.

  According to the invention described in claim 2, since the support body is a main frame structure integrated with the main screed, the rigidity of the support body can be improved, and the other side of the support body can be improved. Can be attached under the same conditions as the step adjustment portion on one side, that is, without special reinforcement.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

  As shown in FIGS. 1 and 2, an asphalt finisher 11 as a paving construction machine is provided with a hopper 13 that receives a mixture supplied from a dump truck at the front of a vehicle body 12. A feeder conveyor device 14 is provided for transferring the mixture over the rear portion of the vehicle body 12. A screw conveyor device 15 provided with a spiral blade for diffusing the mixed material in the width direction is provided at the rear portion of the vehicle body 12, and the rear of the screw conveyor device 15 is connected to the vehicle body 12 via a traction means 16. A screed device 17 for compacting the mixed material is provided.

  Then, the composite material transferred from the hopper 13 to the rear part of the vehicle body 12 by the feeder conveyor device 14 is diffused in the screed width direction by the spiral blades of the screw conveyor device 15, and the predetermined road width is increased by the vibration action of the screed device 17. Molded to paving thickness.

  The screed device 17 includes a central screed 21 pulled by the vehicle body 12 such that one side of the screed screed 22 can be moved in the widening direction from one side end of the main screed 21, and the other side screed screed 23 The other side end of the main screed 21 is provided so as to be movable in the widening direction. Furthermore, between the one side and the other side of the main screed 21 and the one side and the other side elastic screeds 22, 23, the one side and the other side elastic screeds 22, 23 can be moved in the width direction, respectively. A support mechanism 24 on one side and a support mechanism 25 on the other side are provided. The main screed 21 and the telescoping screeds 22 and 23 incorporate a vibration mechanism (not shown).

  The one-side telescoping screed 22 is arranged in close proximity via the one-side support mechanism 24 so as to be movable in the widening direction from the one side end of the main screed 21 on the rear side in the traveling direction of the main screed 21, and the other side telescoping screed The screed 23 is arranged via a support mechanism 25 on the other side so as to be movable in the widening direction from the other side end of the main screed 21 on the rear side in the traveling direction with respect to the one-side telescoping screed 22.

  As shown in FIGS. 3 and 4, the main screed 21 is integrally provided with a mounting frame 26 at a position biased toward the vehicle body, and a recess 27 is formed at a position biased toward the telescoping screed 22. .

  The support mechanism 24 on one side has a step adjustment portion 28 on one side that moves and adjusts one side of the expansion / contraction screed 22 in the height direction with respect to the main screed 21 on one side of the attachment frame body 26 of the main screed 21. is set up.

  The support mechanism 25 on the other side has a box-shaped structure support body 29 integrated with the main screed 21 attached to the other side portion of the attachment frame body 26 of the main screed 21, and through this support body 29, A step adjustment portion 30 on the other side for adjusting the movement of the other stretchable screed 23 in the height direction is provided on the other stretchable screed 23 side. The support 29 is a main frame structure integrated with the attachment frame 26 of the main screed 21 by welding or the like.

  The step adjustment portions 28 and 30 on the one side and the other side are provided at fixed positions in the widening direction of the one side portion and the other side portion of the main screed 21, and their structures are shown in FIG. A pair of height direction guide shafts 32 is attached in parallel to the letter-shaped attachment frame 31, and a holding body 33 is fitted to these height direction guide shafts 32 so as to be slidable in the height direction. By using two guide shafts 32 in the height direction as a set, rigidity against rotation around the axis and rigidity against bending are ensured.

  The holding body 33 has a pair of sliding plates 35 that are vertically movable within the mounting frame 31 welded to the upper and lower portions on one side of the main body plate 34 and a pair of sliding plates on the other side. 36 is welded, the slide plate 35 is provided with a slide hole 37 for fitting with the height direction guide shaft 32, and the slide plate 36 is provided with a slide hole 38.

  As shown in FIGS. 3 to 5, the support mechanisms 24 and 25 on one side and the other side are arranged in a vertical direction and are slidably fitted in a holding body 33 as a member on the main screed 21 side so as to be slidable in the widening direction. A plurality (2) of main-side guide shafts 41 and a plurality of vertically arranged (2) fittingly slidably fitted in the widening direction slidable body 42 with the sliding screeds 22 and 23 on one side and the other side. Book) expansion / contraction side guide shaft 43, and the main side guide shaft 41 and the expansion / contraction side guide shaft 43 are held in parallel, and one side end and the other side end are integrated with each other. Box structures 46 and 47 with 44 and 45, respectively.

  In short, the support mechanisms 24 and 25 on the one side and the other side are provided with holding bodies 33 at fixed positions in the widening direction on one side and the other side of the main screed 21 side. 47, two main side guide shafts 41 are slidably fitted over the entire length so as to be slidable in the widening direction, and further, one side and the other side over the entire length of the two expansion / contraction side guide shafts 43 of the box structures 46, 47. A sliding body 42 integral with the telescoping screeds 22 and 23 is slidably fitted in the widening direction.

  The one side support mechanism 24 and the other side support mechanism 25 include a driving means (not shown) for moving the holding body 33 of the step adjusting portions 28 and 30 in the height direction with respect to the main screed 21, and the step adjusting portions 28 and 30. Drive means (not shown) for moving the box structures 46, 47 in the widening direction with respect to the holding body 33, and the expansion screeds 22, 23 on one side and the other side with respect to the box structures 46, 47 are moved in the widening direction. Drive means (not shown) are provided respectively. As these drive means, a hydraulic cylinder or a screw feed mechanism is used, but the illustration is omitted.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 7 (a), when not working, the box structures 46 and 47 on one side and the other side are accommodated within the range of the main screed 21, respectively, and the expansion and contraction on the one side and the other side is further performed. The screeds 22 and 23 are accommodated within the box structures 46 and 47.

  At the time of work, first, as shown in FIG. 7 (b), the box structures 46, 47 are moved in the widening direction with respect to the holding bodies 33 of the step adjustment portions 28, 30 on one side and the other side. As shown in FIG. 7 (c), the expandable screeds 22, 23 on one side and the other side of the box structures 46, 47 are moved in the widening direction.

  When retracting the telescoping screed, the box structures 46 and 47 are stored and moved in the center with respect to the step adjustment parts 28 and 30 on the one side and the other side, The telescoping screeds 22 and 23 are stored and moved.

  Further, by moving and adjusting the holding body 33 in the height direction along the height direction guide shaft 32 with respect to the mounting frame 31 of the step adjusting portions 28 and 30 on the one side and the other side, the main screed 21 can be adjusted. Adjust the level difference between the expandable screeds 22 and 23 on one side and the other side.

  Next, the effect of this embodiment will be described.

  The other side support mechanism 25 is different from the one side support mechanism 24 in that the other side extendable screed 23 is moved and adjusted in the height direction via a support 29 integrated with the main screed 21. Since the part 30 is arranged on the other side of the elastic screed 23, that is, both the one side and the other side support mechanisms 24, 25, the step adjustment parts 28, 30 are arranged close to each of the elastic screeds 22, 23. Therefore, the load moment acting on the step adjustment portions 28 and 30 on the one side and the other side can be made the same. In other words, conventionally, a long length is required between the step adjustment portion on the main screed side and the telescoping screed. Since there is a support structure, a large load moment is applied to the step adjustment portion on the main screed side, but the step adjustment portions 28 and 30 on one side and the other side are connected to the expansion and contraction screeds 22 and 23 on one side and the other side. Since it is placed close to, the step on one side and the other side from the composite The forces acting on the adjusting portions 28 and 30 can be made the same, so that the step adjusting portions 28 and 30 on both sides can be made common, and one of the step adjusting portions 28 and 30 is connected to the main screed. By firmly supporting through the support body 29 integrated with 21, it is possible to suppress the occurrence of a difference in the deformation amount of the expandable screeds 22 and 23 on both sides due to the pressure from the composite material.

  Furthermore, since the support 29 is a main frame structure integrated with the main screed 21, the rigidity of the support 29 can be improved, and the other side of the telescoping screed 23 side of the support 29 can be improved. The step adjustment part 30 can be attached under the same conditions as the step adjustment part 28 on one side, that is, without any special reinforcement.

  Further, the support mechanism 24, 25 on one side and the other side is a box including a plurality of main guide shafts 41, a plurality of extendable guide shafts 43, and one side and other side plates 44, 45. Since each of the structures 46 and 47 is provided, the box structures 46 and 47 that can ensure rigidity can be easily manufactured using only the plurality of guide shafts 41, 41, 43, and 43 and the side plates 44 and 45.

  Further, as shown in FIG. 8A, the support mechanisms 24 and 25 on one side and the other side slide a plurality of main side guide shafts 41 over the entire length on the holding body 33 on the main screed 21 side. A sliding body that fits freely, and is integral with one and the other extensible screeds 22 and 23 over the entire length of a plurality of extensible guide shafts 43 provided in parallel and integrally with the main guide shaft 41. Since 42 are slidably fitted in the widening direction, the expansion / contraction strokes of these expansion / contraction screeds 22 and 23 can be made larger than the conventional example described in Patent Document 1 shown in FIG. .

  That is, even if the total length L of the main screed 21 is the same, the maximum extension stroke Lmax of the one-side and other-side telescoping screeds 22 and 23 is related to the present invention shown in FIG. It can be made larger than the conventional example shown in FIG.

  The present invention can be used for paving construction machines such as asphalt finishers.

It is a top view which shows one Embodiment of the construction machine for paving provided with the screed apparatus which concerns on this invention. It is a side view of the construction machine for paving same as the above. It is one side view of a screed apparatus same as the above. It is another side view of a screed apparatus same as the above. It is a rear view of a screed apparatus same as the above. It is a disassembled perspective view which shows the level | step difference adjustment part of a screed apparatus same as the above. (A) is a top view which shows the accommodation state of the same screed apparatus, (b) is a top view which shows the semi-widened state of the same screed apparatus, (c) is a top view which shows the maximum widened state of the same screed apparatus. (A) is a top view which shows the maximum widening state of a screed apparatus same as the above, (b) is a top view which shows the maximum widening state of the conventional screed apparatus.

Explanation of symbols

21 Main screed
22, 23 Expandable screed
24, 25 Support mechanism
28, 30 Step adjustment part
29 Support

Claims (2)

The main screed,
A telescoping screed on one side provided to be movable in the widening direction from one side end of the main screed on the rear side in the traveling direction of the main screed;
A telescoping screed on the other side provided so as to be movable in the widening direction from the other side end of the main screed on the rear side in the traveling direction from the telescoping screed on one side;
One side support mechanism provided with a step adjustment part on one side between one side part of the main screed and one side of the screed screed and moving and adjusting the one side of the main screed in the height direction;
There is a step adjustment part on the other side between the other side part of the main screed and the other side screed screed, which moves and adjusts the other side screed screed in the height direction via a support integrated with the main screed. A screed device for a paving construction machine, comprising: a support mechanism on the other side arranged on the side of the side expandable screed side. The screed device for a paving construction machine according to claim 1, wherein the support is a main frame structure integrated with the main screed.

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