JP2008255643A - Screed device of construction machinery for pavement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screed device of construction machinery for pavement, which can suppress an increase in weight for the securement of rigidity by enabling the structural securement of the rigidity of a supporting mechanism. <P>SOLUTION: The one-side expansion screed 22 and the other-side expansion screed 23 are provided on the central main screed 21 in such a manner as to be movable in a widening direction, respectively. The supporting mechanisms 24 and 25 are provided between the one-side and other-side portions of the main screed 21 and the expansion screeds 22 and 23, respectively. In the supporting mechanisms 24 and 25, guide frame bodies 26 are integrally provided in the one-side and other-side portions of the main screed 21, respectively, and width-direction guide shafts 28 are fitted into the guide frame bodies 26 in a such a manner as to be slidable in a width direction, respectively. Height-direction guide shafts 32 are integrally provided along the opposite sides of first supporting frame bodies 31 which are integrally provided from one end of each of the width-direction guide shafts 28 to the other end thereof, respectively. A second supporting frame body 33 is fitted into each of the height-direction guide shafts 32 in such a manner as to be slidable in a height direction, and width-direction guide shafts 34 of the expansion screeds 22 and 23 are slidably fitted into the second supporting frame bodies 33, respectively. <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).

The support mechanism of this screed device is such that the support support portions on one side and the other side can be adjusted in height with respect to the main screed, and the expandable screed on one side and the other side are provided on these support support portions. The telescoping screed is installed through all widening means for moving in the width direction.
Japanese Patent No. 3383908 (page 4, Fig. 1-2)

  In this structure of the support mechanism, all the widening means and the expansion / contraction screed load are applied to the support support part, so it is necessary to secure a large rigidity in the support support part, and the weight of the support support part must be increased. Absent.

  The present invention has been made in view of such points, and by making it possible to structurally ensure the rigidity of the support mechanism, the screed device for a paving construction machine that can suppress an increase in weight for securing the rigidity. The purpose is to provide.

  According to the first aspect of the present invention, the main screed, the one-side telescoping screed provided so as to be movable in the widening direction from one side end of the main screed, and the movable in the widening direction from the other side end of the main screed. The other side of the provided screed is provided between the one side and the other side of the main screed and the one side and the other side screed, and the one side and the other side screed in the width direction. The one side and the other side support mechanisms are movably supported, and the one side and the other side support mechanisms include a guide frame body integrally provided on each of the one side portion and the other side portion of the main screed, and one A first width direction guide shaft on one side and the other side slidably fitted in the width direction on the side and other side guide frames, and a first width direction guide shaft on the one side and the other side. From one end to the other One side and the other first support frame provided integrally with each other, and one side provided integrally in the height direction along the opposite surface side of the one side and the other side first support frame, and The other side height direction guide shaft, the one side and the other side height direction guide shaft respectively fitted to the one side and the other side second direction support frame slidably in the height direction, one side and A second width-direction guide shaft on one side and the other side which are slidably fitted to the second support frame on the other side and are integrally provided in the width direction of the one-side and other-side telescoping screed, respectively; Is a screed device for a paving construction machine.

  According to a second aspect of the present invention, there is provided a screed device for a paving construction machine according to the first aspect, wherein the first support frame body is disposed on the main screed side from the main plate and the one end and the other end of the main plate. A width direction bracket that projects integrally and fixes and supports one end and the other end of each of the plurality of first width direction guide shafts, and a plurality of height directions that project integrally from the upper end and lower end of the main body plate toward the telescoping screed side. A height direction bracket for fixing and supporting the upper and lower ends of the guide shaft is provided.

  According to a third aspect of the present invention, the width direction bracket and the height direction bracket fold the metal plate against the main body plate of the first support frame body in the screed device for a paving construction machine according to the second aspect. It is formed by bending.

  According to the first aspect of the present invention, the guide frame, the first width direction guide shaft, the first support frame, the height direction guide shaft, the second support frame, and the second The width-direction guide shaft forms one-side and other-side support mechanisms that support the one-side and other-side telescoping screeds so that they can move in the width direction, so the guide shaft and the support frame are repeated alternately. With the closed frame structure used, the rigidity of the support mechanism can be secured, and an increase in weight for securing the rigidity can be suppressed.

  According to the second aspect of the present invention, the first support frame body includes the main body plate, the width direction brackets respectively protruding from the one side end and the other side end to the main screed side, and the plurality of first frames. The width direction guide shaft constitutes a closed frame body, and on the opposite side, a main body plate, height direction brackets projecting from the upper end and lower end thereof to the telescoping screed side, and a plurality of height direction guide shafts Since the closed frame body is configured as described above, a highly rigid support mechanism can be configured in a compact manner.

  According to the third aspect of the present invention, the width direction bracket and the height direction bracket are formed on the body plate of the first support frame body by bending the metal plate, so that it is lightweight and robust. Such a first support frame can be obtained.

  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. The support mechanisms 24 and 25 on one side and the other side supported by 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 disposed close to the rear side of the main screed 21 via the one-side support mechanism 24, and the other-side telescoping screed 23 is connected to the one-side telescoping screed 22 via the other-side support mechanism 25. It is arranged close to the rear side.

  These one-side and other-side support mechanisms 24, 25 are provided with a guide frame 26 on one side and the other side of the main screed 21 and at a position biased toward the vehicle body as shown in FIG. Recesses 27 are formed on the one side and the other side of the main screed 21, respectively, and at the positions biased toward the telescoping screed 22 as shown in FIG. The first width direction guide shaft 28 on one side and the other side for guiding the movement in the width direction of the one side and the other side screed screeds 22 and 23 are slidably fitted in the width direction. The one-side and the other-side step adjustment portions 29 that support the one-side and the other-side telescoping screeds 22 and 23 so as to be movable in the height direction can be respectively adjusted in the width direction. It is installed so that it can move.

  These one-side and other-side step adjustment portions 29 are integrated with one-side and other-side first support frame bodies 31 from one end to the other end of the one-side and other-side first width direction guide shaft 28, respectively. Along with the opposite surface side of the first support frame 31 on the one side and the other side, the height direction guide shafts 32 on the one side and the other side are respectively integrally provided in the height direction. The one side and the other side second support frame bodies 33 are fitted to the one side and the other side height direction guide shafts 32 so as to be slidable in the height direction.

  A second width on the one side and the other side provided integrally with each other over the entire width direction on the one side and the other side screed screeds 22 and 23 with respect to the second support frame 33 on the one side and the other side. Each direction guide shaft 34 is slidably fitted.

  The first width-direction guide shaft 28, the height-direction guide shaft 32, and the second width-direction guide shaft 34 are each used as a pair, so that the rigidity against rotation around the axis and the rigidity against bending Secure.

  The first width direction guide shaft 28 on one side and the other side is on the main screed that is fitted and arranged linearly in the width direction on the guide frame 26 on one side and the other side of the main screed 21. It is a guide shaft, and supports the movable screeds 22 and 23 on one side and the other side so as to be movable in the width direction by the movement guide of these guide shafts on the main screed.

  As shown in FIG. 3, the second width-direction guide shafts 34 on one side and the other side are stretchable screeds integrated by mounting frames 35 above the stretchable screeds 22, 23 on the one side and the other side, respectively. It is an upper guide shaft, and the extension screeds 22 and 23 on one side and the other side are respectively guided to move in the width direction by these extension screed upper guide shafts.

  As shown in FIG. 4, the first support frame 31 has one end and the other end of the plurality of first width direction guide shafts 28 on the main screed side from the one end and the other end of the body plate 41. Each of the width direction brackets 43 fixedly held by a plurality of mounting holes 42 is integrally projected, and the upper end of the plurality of height direction guide shafts 32 and the telescoping screed side from the upper end and lower end of the main body plate 41, respectively. Height direction brackets 45 each having a lower end fixed and held by a plurality of mounting holes 44 are integrally projected.

  These first support frames 31 can form a width direction bracket 43 and a height direction bracket 45 with respect to the main body plate 41 by forming and bending a single metal plate such as an iron plate. Although desirable, the width direction bracket 43 and the height direction bracket 45 may be welded to the main body plate 41 and integrated.

  The second support frame 33 has an upper end and a lower end on the main screed side of the main body 46 formed in a plate shape (in the case of the support mechanism 24 on one side) or a box shape (in the case of the support mechanism 25 on the other side). A plurality of height direction slide plates 48 each having a plurality of height direction guide shafts 32 and a plurality of slide holes 47 slidably fitted to the height direction guide shafts 32 are provided in a projecting manner. Width direction slide plate 50 having a plurality of sliding holes 49 slidably fitted to a plurality of second width direction guide shafts 34 on one side end and the other side end of expansion / contraction screed side of portion 46 However, each is integrally projected.

  The height direction guide shaft 32 fitted between the upper and lower height direction brackets 45 of the first support frame 31 is a mounting hole drilled at a location deviated from the center of the main body plate 41 toward the wider side. Fixed to 44. As a result, the step adjustment portions 29 on the one side and the other side are provided so as to be able to protrude from the one end and the other end of the main screed 21 in the widening direction, respectively.

  That is, as shown in the change from FIG. 6 to FIG. 7, the one side and the other side support mechanisms 24, 25 can be protruded from the one side end and the other side end of the main screed 21 in the widening direction. And a first support frame 31 on the other side, and at one of the first support frame 31 on the other side and the other side, the first and second side support frame 31 can protrude from the main screed 21 in the widening direction. The second support frame bodies 33 on one side and the other side that support 22 and 23 so as to be movable in the width direction are connected to each other. In short, the one side and the other side screed screeds 22, 23 are supported so as to be movable in the width direction at positions projecting from the one side end and the other side end of the main screed 21, respectively.

  The support mechanisms 24 and 25 on one side and the other side are a driving means (not shown) for moving the first support frame 31 in the width direction with respect to the main screed 21 and a second support for the first support frame 31. Drive means (not shown) for moving the frame 33 in the height direction and drive means (not shown) for moving the telescoping screeds 22 and 23 in the width direction with respect to the second support frame 33 are provided. Yes. As these drive means, a hydraulic cylinder or a screw feed mechanism is used, but the illustration is omitted.

  For example, the step adjustment portion 29 on one side and the other side adjusts the movement of the one side and the other side of the screed screeds 22 and 23 with respect to the main screed 21 along the plurality of height direction guide shafts 32 in the height direction. A hydraulic cylinder or a screw-type lifting mechanism.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 8 (a), when not in operation, the first support frame 31 on one side and the other side is stored on one side and the other side of the main screed 21, respectively. The right and left telescoping screeds 22 are moved leftward to the limit and the left telescoping screed 23 is moved rightward to the limit with respect to the second support frame 33 on one side and the other side. The screeds 22 and 23 are accommodated within the full width of the main screed 21.

  At the time of work, first, as shown in FIG. 8 (b), the one side and the other side of the screed screeds 22, 23 are moved in the widening direction with respect to the one side and the other side second support frame 33, Further, as shown in FIG. 8C, the first support frame 31 on the one side and the other side are moved in the widening direction with respect to the guide frame 26 on the one side and the other side on the main screed 21, respectively. And half of them protrude from the left and right ends of the main screed 21. As a result, the step adjustment portions 29 on the one side and the other side move outward from the full width of the main screed 21.

  By using these step adjustment parts 29, the second support frame 33 on one side and the other side is moved and adjusted in the height direction with respect to the first support frame 31 on the one side and the other side, thereby expanding and contracting with respect to the main screed 21. Adjust the level difference between screeds 22 and 23.

  Next, the effect of this embodiment will be described.

  The one-side and other-side support mechanisms 24, 25 are provided with a step adjustment portion 29 for moving and adjusting the one-side and other-side telescoping screeds 22, 23 in the height direction with respect to the main screed 21, respectively. Since it is provided so that it can protrude in the widening direction from the side end and the other side end, the step adjustment portion 29 of the main screed 21 is compared with the step adjustment portion 29 at the time of widening fixed at a fixed position in the main screed 21. The load moment acting on the step adjustment section 29 can be reduced by shortening the distance from the step adjustment section 29 to the tip of the expansion / contraction screed at the time of widening by the amount projected from the one end and the other end in the widening direction. In addition, the strength of the step adjustment portion 29 can be easily secured.

  Furthermore, the strength of the step adjustment portion 29 that receives the load moment can be easily secured by the plurality of height direction guide shafts 32.

  Further, the one side and the other side support mechanisms 24 and 25 are provided to guide movement of the one side and the other side main screed upper guide shafts (first width direction guide shafts 28) arranged linearly on the main screed 21. Because the first and the other screed screeds 22 and 23 are supported so as to be movable in the width direction, the main screed 21 and the main screed upper guide shaft, and the one and the other main screed upper guide shafts are mutually connected. It is possible to prevent the generation of useless front and rear space between them, and the support mechanisms 24 and 25 on one side and the other side can be compactly integrated on the main screed 21 side to reduce the overall length in the front and rear direction and Can easily adjust the weight balance. That is, the weight balance between the vehicle body 12 and the screed device 17 can be maintained. It is also possible to suppress an increase in the weight of the vehicle body side counterweight.

  In addition to the main screed upper guide shaft installed on the main screed 21, the support mechanisms 24, 25 on the one side and the other side are further integrated on the extension screeds 22, 23 on the one side and the other side, respectively. Since it has a guide shaft (second width direction guide shaft 34) on the extendable screed, it is possible to prevent unnecessary space from being generated between the extendable screeds 22, 23 and the guide shaft in the front-rear direction. The overall length dimension in the front-rear direction can be suppressed, and the weight balance in the front-rear direction can be easily adjusted.

  Further, the one side and the other side support mechanisms 24 and 25 are arranged so that the one side and the other side extendable screeds 22 and 23 respectively protrude from the one side end and the other side end of the main screed 21 in the widening direction. Since it is supported so as to be movable in the width direction, the amount of overlap between the main screed 21 and the telescoping screeds 22 and 23 can be minimized when the telescoping screed is widened, and the telescoping screeds 22 and 23 on one side and the other side can be widened more than before. .

  Furthermore, one side and the other side second support frame body 33 for supporting the stretchable screed are connected to each other at the projecting portions of the first side support frame 31 and the other side first support frame 31 that can project from the main screed 21 in the widening direction. As a result, the maximum widening position of the first and second telescoping screeds 22 and 23 can be adjusted by the amount of attachment deviation in the widening direction of the second support frame 33 relative to the first support frame 31.

  The support mechanisms 24 and 25 on one side and the other side are provided with a guide frame body 26 and a recess 27 on the main screed 21 so that the first width direction guide shaft 28 can be moved in the width direction on the guide frame body 26. Since the step adjustment part 29 for adjusting the movement in the height direction is installed in the recess 27 so as to be movable in the width direction, means for moving the telescoping screeds 22, 23 on the main screed 21 is provided on the main screed 21. Space-efficient and compact installation.

  Further, there is no sufficient plane space on the main screed 21 by the guide frame body 26 provided on the main screed 21 so as to be biased toward the vehicle body 12 and the recess 27 formed so as to be biased on the side of the stretchable screeds 22, 23. However, the first width direction guide shaft 28 and the step adjustment portion 29 can be provided side by side.

  Further, the guide frame body 26, the first width direction guide shaft 28, the first support frame body 31, the height direction guide shaft 32, the second support frame body 33, and the second width direction guide shaft 34 are provided. As a result, the support mechanisms 24 and 25 on the one side and the other side that respectively support the one-side and other-side telescoping screeds 22 and 23 so as to be movable in the width direction are formed. In order to maintain the weight balance between the vehicle body 12 and the screed device 17, it is possible to secure the rigidity of the support mechanisms 24 and 25 by the closed frame structure repeatedly used for the The weight increase of the vehicle body side counterweight can also be suppressed.

  Further, the first support frame 31 includes a main body plate 41, a width direction bracket 43 protruding from the one side end and the other side end to the main screed 21 side, and a plurality of first width direction guide shafts 28. To form a closed frame body, and on the opposite side, a main body plate 41, brackets 45 for height direction projecting from the upper end and lower end thereof toward the extendable screeds 22 and 23, respectively, and a plurality of height direction guide shafts Since the closed frame body is constituted by 32, the highly rigid support mechanisms 24 and 25 can be compactly constituted.

  In addition, since the metal plate such as an iron plate is bent, the width direction bracket 43 and the height direction bracket 45 are formed on the main body plate 41 of the first support frame 31. One support frame 31 can be obtained.

  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 the rear view which looked at the screed apparatus same as the above from the back side. It is a disassembled perspective view which shows the support mechanism of a screed apparatus same as the above. It is a side view of a screed apparatus same as the above. It is a perspective view which shows the accommodation state of a screed apparatus same as the above. It is a perspective view which shows the largest widening state 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.

Explanation of symbols

21 Main screed
22, 23 Expandable screed
24, 25 Support mechanism
26 Guide frame
28 First width direction guide shaft
31 First support frame
32 Height direction guide shaft
33 Second support frame
34 Second widthwise guide shaft
41 Body plate
43 Width bracket
45 Height bracket

Claims (3)

The main screed,
One side telescoping screed provided so as to be movable in the widening direction from one side end of the main screed;
A telescoping screed on the other side provided to be movable in the widening direction from the other end of the main screed;
One side and the other side that are provided between one side and the other side of the main screed and the one side and the other side screed, respectively, and that support the side and the other side screed so as to be movable in the width direction. And a support mechanism of
The support mechanism on one side and the other side is
A guide frame provided integrally on one side and the other side of the main screed,
A first width direction guide shaft on one side and the other side slidably fitted in the width direction on the one side and the other side guide frame bodies,
A first support frame on one side and the other side integrally provided from one end to the other end of the first width direction guide shaft on one side and the other side;
A height direction guide shaft on one side and the other side integrally provided in the height direction along opposite surfaces of the first support frame on the one side and the other side;
A second support frame on one side and the other side, which is slidably fitted in the height direction guide shafts on the one side and the other side, respectively,
The second width direction of the one side and the other side, which is slidably fitted to the second support frame on the one side and the other side, and is integrally provided in the width direction of the expandable screed on the one side and the other side, respectively. A screed device for a paving construction machine, characterized by comprising a guide shaft. The first support frame is
A body plate,
A width direction bracket integrally projecting from the one side end and the other side end of the main body plate to the main screed side and fixing and supporting one end and the other end of the plurality of first width direction guide shafts
2. A height direction bracket that integrally projects from the upper end and the lower end of the main body plate toward the telescoping screed side and that fixes and supports the upper end and the lower end of each of the plurality of height direction guide shafts. Screed equipment for construction machines for paving. The screed device for a paving construction machine according to claim 2, wherein the width direction bracket and the height direction bracket are formed by bending a metal plate with respect to the main body plate of the first support frame. .

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