JP5372736B2 - Structure to prevent clogging of decomposer nozzle in road paving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clogging prevention structure of a decomposing agent nozzle in a road paving machine, capable of surely preventing clogging of the decomposing agent nozzle smaller in nozzle opening than an emulsion nozzle by effectively preventing, in spraying of an emulsion, scattering of the emulsion to the decomposing agent nozzle set to a non-spray state at a portion where two spray bars are overlapped according to the expansion/contraction amount thereof. <P>SOLUTION: In the clogging prevention structure of a decomposing nozzle in a road paving machine, a cover 15a, 15b is provided on a decomposing agent nozzle 14 set to the non-spray state on at least one spray bar 7A and/or 7B at the portion where the two extensible spray bars 7A, 7B are overlapped according to the expansion/contraction amount thereof, the cover having a required length for preventing the scattering of the emulsion sprayed from the emulsion nozzle 10 on the other spray bar 7B or 7A to prevent the clogging of the decomposing agent nozzle. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a structure for preventing clogging of a decomposing agent nozzle in a road pavement machine, and in particular, at the time of emulsion spraying, it is set in a non-spraying state at a portion where two spray bars overlap according to the amount of expansion / contraction. The present invention relates to a structure for preventing clogging of a decomposing agent nozzle in a road pavement machine capable of effectively preventing the emulsion from splashing into the decomposing agent nozzle and preventing clogging of the decomposing agent nozzle whose nozzle diameter is smaller than that of the emulsion nozzle. Is.

  A configuration example of a telescopic spray bar portion in a conventional road paving machine will be described with reference to FIG. This figure shows the telescopic spray bar portion in section. In the figure, a lower surface plate 3 is fixed immediately behind a rear wheel 2 on the rear side of the airframe 1 in a road paving machine, and lower frames 4a and 4b are provided at lower portions of the lower surface plate 3 in the traveling direction of the airframe 1. It is fixed. Below the lower surface plate 3, a spray bar cover 6 suspended from the body 1 via a support shaft 5 extends in the width direction of the body 1. In the spray bar cover 6, a pair of spray bars 7A, 7B are slidably supported by a pair of rollers 8a, 8a and 8b, 8b and slide members 9a and 9b, respectively, with their positions shifted in the traveling direction of the machine body 1. It is provided so as to be extendable in the width direction of the machine body 1 by a hydraulic cylinder or the like (not shown). A plurality of emulsion nozzles 10 are attached to the lower surfaces of the spray bars 7A and 7B at equal intervals along the length direction (perpendicular to the drawing sheet).

  In such a telescopic spray bar, a portion where two spray bars overlap each other according to the amount of expansion and contraction and a single spray bar portion other than the overlapping portion per unit length at the time of spraying the emulsion. The number of emulsion nozzles in the spraying state is set to be approximately the same. For this reason, in a portion where the two spray bars overlap each other, an emulsion nozzle that is in a non-spraying state is generated in at least one of the two spray bars.

  Conventionally, a configuration of a telescopic spray bar portion similar to that shown in FIG. 9 is known from a gazette disclosing a retaining plate device for a road paving machine. In this prior art, a support member extending in the width direction of a machine main body is suspended and supported by the machine main body via a support shaft, and the slide member slides on a pair of support rollers attached to the support member so as to be able to roll. The left spray bar is fixed to the lower part of the slide member. Further, another slide member is slidably supported by another pair of support rollers attached to the support member so as to be able to roll, and a right spray bar is fixed to a lower portion of the other slide member. On the lower surfaces of the left and right spray bars, a plurality of pairs of emulsion nozzles having different nozzle diameters are attached at equal intervals along the length direction thereof (see, for example, Patent Document 1).

JP 2007-303189 A (page 5, FIG. 3).

  In the conventional telescopic spray bar described in FIG. 9, a unit at the time of emulsion spraying includes a portion where two spray bars overlap each other according to the amount of expansion and contraction and a single spray bar portion other than the overlapping portion. The number of emulsion nozzles in a spraying state per length is set to be approximately the same.

  By the way, recently, a plurality of emulsion nozzles mounted at equal intervals on the lower surface of each spray bar are each provided with a decomposing agent nozzle having a smaller nozzle diameter than the emulsion nozzle, and after the emulsion is sprayed from the emulsion nozzle, A decomposition agent is sprayed from a decomposer nozzle attached thereto to accelerate hardening of the dispersed emulsion. However, at a portion where the two spray bars overlap each other, an emulsion nozzle that is in a non-spraying state is generated in at least one of the two spray bars. Then, the emulsion nozzle and the decomposer nozzle set in the non-spreading state receive the scattering of the emulsion from the emulsion nozzle set in the spraying state on the other spray bar. At this time, when the decomposer nozzle having a nozzle diameter smaller than that of the emulsion nozzle is subjected to scattering of the emulsion on its nozzle tip, it tends to solidify and cause clogging.

  This problem also occurs when a plurality of emulsion nozzles in the prior art described in Patent Document 1 are each provided with a decomposer nozzle.

  Therefore, at the time of emulsion spraying, the spray nozzle is effectively prevented from splashing to the decomposer nozzle that is set to the non-spraying state in the part where the two spray bars overlap according to the amount of expansion and contraction. There is a technical problem to be solved in order to reliably prevent clogging of the decomposer nozzle smaller than the emulsion nozzle, and the present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is characterized in that a plurality of emulsion nozzles are provided at an appropriate interval and the plurality of emulsion nozzles are connected to the emulsion nozzles. Road pavement machine having a telescopic spray bar in which two spray bars each provided with a decomposing agent nozzle for spraying a decomposing agent for accelerating the hardening of the dispersed emulsion are arranged in parallel in the longitudinal direction of the machine. In the structure for preventing clogging of the decomposing agent nozzle, the non-spraying state is set on at least one of the spray bars in a portion where the two spray bars overlap according to the expansion / contraction amount of the expansion / contraction type spray bar. The decomposing agent nozzle is clogged by preventing scattering of the emulsion sprayed from the emulsion nozzle on the other spray bar. Clogging prevention structure of the decomposition agent nozzles in road paving machine having a required length of the cover to prevent to provide.

  According to this configuration, in the telescopic spray bar, the portion where two spray bars overlap each other according to the amount of expansion / contraction and the single spray bar portion other than the overlapping portion per unit length at the time of emulsion dispersion The number of emulsion nozzles (decomposing agent nozzles) in the spraying state is set to be approximately the same. For this reason, at the portion where the two spray bars overlap each other, at least one of the two spray bars has an emulsion nozzle and a decomposing agent nozzle that are in a non-spraying state. Then, the emulsion nozzle and the decomposer nozzle set in the non-spreading state receive the scattering of the emulsion from the emulsion nozzle set in the spraying state on the other spray bar. At this time, the decomposition agent nozzle having a nozzle diameter smaller than that of the emulsion nozzle is likely to be clogged due to solidification of the emulsion when the nozzle tip receives scattering of the emulsion. However, by providing a cover of the required length to prevent the emulsion from scattering on the part of the decomposing agent nozzle that is set in a non-spraying state at the part where the two spray bars overlap according to the amount of expansion and contraction, Dispersion of the emulsion to the decomposer nozzle is prevented and clogging of the decomposer nozzle is prevented.

  According to a second aspect of the present invention, in the first aspect of the invention, the non-spraying state is set on both spray bars in a portion where the two spray bars overlap each other according to the amount of expansion / contraction of the telescopic spray bar. Provided is a structure for preventing clogging of a decomposition agent nozzle in a road pavement machine in which a cover having a required length is provided for each of the decomposition agent nozzle portions.

  According to this configuration, there are, for example, five emulsion nozzles (decomposing agent nozzles) on each spray bar at the portion where two spray bars overlap according to the amount of expansion and contraction. In one of the basic spray bars, three emulsion nozzles (decomposing agent nozzles) are set to the spraying state, and the remaining two emulsion nozzles (decomposing agent nozzles) are set to the non-spraying state. Then, in the other spray bar, on the contrary, the three emulsion nozzles (decomposing agent nozzles) are set in the non-spreading state, and the remaining two emulsion nozzles (decomposing agent nozzles) are set in the spraying state. . At this time, on the part of the two decomposing agent nozzles set in the non-spreading state on one spray bar and the part of the three decomposing agent nozzles set in the non-spreading state on the other spray bar, By providing a cover having a required length, the emulsion is prevented from being scattered to the decomposer nozzle set in the non-spreading state on both spray bars, and the decomposer nozzle is not clogged.

  According to a third aspect of the present invention, in the first aspect of the present invention, the non-spraying state is brought about only on one spray bar in a portion where the two spray bars overlap each other according to the amount of expansion / contraction of the telescopic spray bar. When the decomposer nozzle is set, a structure for preventing clogging of the decomposer nozzle in a road pavement machine provided with a cover having a required length for the portion of the decomposer nozzle that is in the non-spraying state is provided.

  According to this configuration, there are, for example, three emulsion nozzles (decomposing agent nozzles) on each spray bar in the portion where two spray bars overlap according to the amount of expansion and contraction. If all three emulsion nozzles (decomposition agent nozzles) are set to the non-spraying state in one spray bar of the original spray bar, the other three spray nozzles in the other spray bar. All of the (decomposing agent nozzles) are set to the spraying state. At this time, the cover of the required length is provided only on one spray bar side where all the three decomposer nozzles are set to the non-spraying state, so that the non-spraying state is set on the one spray bar. Thus, the emulsion is prevented from scattering to the decomposer nozzle, and clogging of the decomposer nozzle is prevented.

  According to a fourth aspect of the present invention, in the first or second aspect of the invention, the cover having the required length provides a structure for preventing clogging of the decomposing agent nozzle in a road pavement machine attached to the lower frame portion of the fuselage. To do.

  According to this configuration, even if the length of the overlapping portion of the two spray bars changes according to the amount of expansion / contraction, the cover of the required length is attached to the lower frame portion of the fuselage. The portion of the decomposing agent nozzle set in the non-spreading state on the spray bar is surely covered with the cover having the required length, so that the emulsion is prevented from scattering to the decomposing agent nozzle.

  The invention according to claim 5 is the invention according to claim 1 or 3, wherein the cover having the required length is attached to be movable on a guide rail provided on a lower frame portion of the fuselage via a guide roller, and There is provided a structure for preventing clogging of a decomposing agent nozzle in a road pavement machine that is moved by a support arm from one of the other spray bars far from the cover having the required length.

  According to this configuration, the disintegrating agent nozzle that is in a non-spraying state is set only on one spray bar in a portion where two spray bars overlap according to the amount of expansion / contraction, and all emulsion nozzles are set on the other spray bar. When the spraying state is set, the cover having a required length that prevents the emulsion from splashing to the disintegrating agent nozzle that is in the non-spraying state on the one spray bar is moved in accordance with the movement of the other spray bar. As a result, even if the length of the overlapping part of the two spray bars changes, the disintegrant nozzle set in the non-spray state is securely covered with the cover of the required length, and the disintegrant nozzle The emulsion is prevented from scattering.

  The invention according to claim 1 is set to a non-spraying state on at least one of the spray bars in a portion where the two spray bars overlap each other according to the amount of expansion / contraction of the telescopic spray bar during the dispersion of the emulsion. By providing a cover with a required length for the part of the decomposer nozzle that is present, it is possible to effectively prevent the emulsion from scattering to the decomposer nozzle whose nozzle diameter is smaller than that of the emulsion nozzle. There is an advantage that nozzle clogging can be reliably prevented.

  The invention according to claim 2 is a decomposition agent that is set in a non-spraying state on both spray bars in a portion where two spray bars overlap each other according to the amount of expansion / contraction of the telescopic spray bar during emulsion dispersion. By providing a cover of the required length for each nozzle part, it is possible to effectively prevent the emulsion from splashing into these decomposer nozzles and to reliably prevent clogging of the decomposer nozzles. There is an advantage that you can.

  In the invention according to claim 3, when the emulsion is sprayed, a decomposing agent nozzle that is in a non-spraying state is set only on one spray bar in a portion where two spray bars overlap according to the amount of expansion / contraction of the expandable spray bar. In this case, by providing a cover with a required length for the decomposer nozzle, it is possible to effectively prevent the emulsion from scattering to the decomposer nozzle, and the decomposer is in a non-sprayed state. There is an advantage that nozzle clogging can be reliably prevented.

  In addition to the effects of the invention described in claim 1 or 2, the invention described in claim 4 can further reduce the length of the portion where the two spray bars overlap according to the amount of expansion or contraction. The portion of the decomposing agent nozzle set in the non-spraying state on the spray bar can be surely covered with the cover of the required length, and the emulsion can be effectively prevented from scattering to the decomposing agent nozzle. There is an advantage.

  In addition to the effect of the invention described in claim 1 or 3, the invention described in claim 5 can also be applied to the emulsion spraying even if the length of the overlapping portion of the two spray bars changes according to the amount of expansion / contraction. Advantageous in that the disintegrant nozzle set in the non-spraying state on the spray bar can be surely covered with a cover of a required length, and the dispersion of the emulsion to the disintegrant nozzle can be effectively prevented. There is.

FIGS. 1-8 shows the clogging prevention structure of the decomposition agent nozzle in the road paving machine based on the Example of this invention.
The figure which shows the clogging prevention structure of the decomposition agent nozzle in the road paving machine which concerns on Example 1 by a cross section. The top view of the expansion-contraction type spray bar part equivalent to the XX cross section in FIG. FIG. 5 is a diagram for describing the emulsion scattering prevention effect by the cover with respect to the decomposing agent nozzle set in a non-spraying state according to the expansion / contraction length of the expansion / contraction spray bar in Example 1, using specific numerical examples. (A) When the telescopic spray bar is contracted, all the emulsion nozzles and disintegrant nozzles in the left and right spray bars are not sprayed. (B) When the telescopic spray bar is contracted, the left and right sprays When the emulsion nozzle and disintegrant nozzle in the bar are in a sprayed state, (c) is when the extension amount is set to 3250 mm, and (d) is when the extension amount is set to 3500 mm. Using a specific numerical example, the cover prevents the emulsion from being scattered by the cover for the decomposer nozzle set to the non-spraying state in accordance with the expansion / contraction length of the expansion / contraction spray bar following (a) to (d) in FIG. It is a figure for demonstrating, (a) is the case where the expansion | extension amount is set to 3750 mm, (b) is the time of the maximum expansion | extension, and the expansion amount is set to 6000 mm. The figure which shows the clogging prevention structure of the decomposition agent nozzle in the road paving machine which concerns on Example 2 by a cross section. The top view of the expansion-contraction type spray bar part equivalent to the YY cross section in FIG. FIG. 5 is a diagram for explaining the emulsion scattering prevention effect by the cover with respect to the decomposing agent nozzle set to a non-spraying state according to the extension amount of the telescopic spray bar in Example 2 using specific numerical examples; (A) is when the telescopic spray bar is contracted, (b) is when the extension is set to 3250 mm, (c) is when the extension is set to 3750 mm, (d) is when the extension is When set to 4500 mm. Using a specific numerical example, the cover prevents the emulsion from scattering by the cover for the decomposer nozzle set to the non-spraying state according to the expansion / contraction length of the expansion / contraction spray bar following (a) to (d) of FIG. It is a figure for demonstrating, (a) is a case where the expansion | extension amount is set to 5500 mm, (b) is the time of the maximum expansion | extension, and a case where the expansion amount is set to 6000 mm. Sectional drawing of the expansion-contraction type spray bar part in the conventional road paving machine.

  When spraying the emulsion, the spray nozzle is effectively prevented from splashing into the decomposer nozzle, which is set to the non-spraying state, where the two spray bars overlap according to the amount of expansion and contraction. In order to achieve the object of reliably preventing clogging of smaller decomposer nozzles, a plurality of emulsion nozzles are provided at appropriate intervals, and the plurality of emulsion nozzles are sprayed from the emulsion nozzles Decomposing agent for road pavement machines having two types of spray bars, each having a decomposing agent nozzle for spraying a decomposing agent for promoting emulsion hardening, each having a telescopic spray bar arranged in parallel in the longitudinal direction of the machine. A nozzle clogging prevention structure, at least in a portion where the two spray bars overlap according to the amount of expansion / contraction of the expansion / contraction spray bar For the decomposer nozzle set in a non-spraying state on one of the spray bars, the spray of the emulsion sprayed from the emulsion nozzle on the other spray bar is prevented, and the eyes of the decomposer nozzle are prevented. This was achieved by providing a cover with the required length to prevent clogging.

  Hereinafter, the clogging prevention structure of the decomposition agent nozzle in the road paving machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2 and FIG. 5 and FIG. 6 showing a second embodiment to be described later, the same or equivalent members and parts in FIG. Omitted. First, the structure of the clogging prevention structure of the decomposition agent nozzle in the road paving machine according to the present embodiment will be described with reference to FIGS. 1 and 2.

  In FIG. 1, below the lower surface plate 3, a support member 11 extending in the width direction of the body 1 is suspended and supported by the body 1 via a support shaft 5. The left spray bar cover 13a is movably supported by a pair of guide rollers 12a and 12a on one end side (left side in the figure) of the support member 11, and the left spray bar 7A is mounted in the left spray bar cover 13a. It has been. Further, the right spray bar cover 13b is movably supported by a pair of guide rollers 12b and 12b on the other end side (right side in the figure) of the support member 11, and the right spray bar 7B is mounted in the right spray bar cover 13b. It has been.

  As shown in FIG. 2, the left and right spray bars 7A, 7B are arranged in parallel before and after the traveling direction of the airframe 1, and are arranged in the width direction of the airframe 1 by a hydraulic cylinder or the like. The telescopic spray bar 7 is configured to be telescopic. In the example of FIG. 2, six emulsion nozzles 10 are provided at equal intervals on each spray bar 7A, 7B.

Each emulsion nozzle 10 is provided with a decomposition agent nozzle 14 for applying a decomposition agent that accelerates hardening of the emulsion distributed from the emulsion nozzle 10. The decomposer nozzle 14 has a nozzle diameter smaller than the nozzle diameter of the emulsion nozzle 10, and in the example of FIG. 1, each decomposer nozzle 14 is attached to each of the outer surface portions of the left and right spray bar covers 13a and 13b. It has been. As indicated by a two-dot chain line in FIG. 1, the decomposing agent is sprayed from each decomposing agent nozzle 14 on the area of the emulsion sprayed from the emulsion nozzle 10.

  Here, in the telescopic spray bar 7, the left and right spray bars 7 </ b> A and 7 </ b> B overlap with each other according to the amount of expansion / contraction (portion indicated by W in FIG. 2) and a single spray other than the overlapping portion W. In the bar 7A or 7B portion, the number of the emulsion nozzles 10 and the decomposing agent nozzles 14 that are in a sprayed state per unit length at the time of spraying the emulsion is set to be the same. Therefore, in the portion W where the left and right spray bars 7A and 7B overlap, at least one of the left and right spray bars 7A and 7B is not sprayed on the emulsion nozzle 10 And a decomposer nozzle 14 is produced.

  The emulsion nozzle 10 and the decomposing agent nozzle 14 set in the non-spreading state receive the scattering of the emulsion from the emulsion nozzle 10 set in the spraying state on the other spray bar 7B or 7A. At this time, the decomposition agent nozzle 14 having a nozzle diameter smaller than that of the emulsion nozzle 10 is likely to be clogged due to solidification of the emulsion when the nozzle tip receives scattering of the emulsion.

  On the other hand, in this embodiment, the left and right spray bars 7A and 7B are not sprayed on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap according to the amount of expansion and contraction of the telescopic spray bar 7. Covers 15a and 15b of required lengths are provided for the set part of the decomposing agent nozzle 14 in order to prevent the emulsion from scattering and clogging. As shown in FIG. 1, one cover 15a is attached to a portion of the lower frame 4a, and the other cover 15b is attached to a portion of the lower frame 4b.

  Next, the action of the clogging prevention structure of the decomposing agent nozzle in the road paving machine configured as described above will be concretely described with reference to FIGS. 3 (a) to 3 (d) and FIGS. 4 (a) and 4 (b). A description will be given together with typical numerical examples. In these drawings, the black circles indicate the emulsion nozzles and the decomposer nozzles in the sprayed state, and the white circles indicate the emulsion nozzles and the decomposer nozzles in the non-sprayed state.

  (FIG. 3 (a)) When the telescopic spray bar 7 is contracted, a switch (not shown) is set so that all the emulsion nozzles 10 and the decomposing agent nozzles 14 in the left and right spray bars 7A and 7B are not sprayed. Is turned off. In this case, the phenomenon of clogging of the decomposer nozzle 14 does not occur.

  (FIG. 3B) When the telescopic spray bar 7 is contracted as in FIG. 3A, the emulsion nozzles 10 and the decomposing agent nozzles 14 in the left and right spray bars 7A and 7B are in a sprayed state. A switch (not shown) for switching is turned on. In this case, the overlapping portion W of the left and right spray bars 7A and 7B has substantially the entire length. In the overlapping portion W, there are six emulsion nozzles 10 and decomposer nozzles 14 on the left and right spray bars 7A and 7B, respectively. In the left and right spray bars 7A and 7B, the three emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a spraying state, and the remaining three emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a non-spraying state. . At this time, the three decomposing agent nozzles 14 set in the non-spraying state on the left spray bar 7A are covered with the cover 15a, and the three decomposing agents set in the non-spraying state on the right spray bar 7B. The nozzle 14 is covered with a cover 15b. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spreading state on the left and right spray bars 7A and 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 3C) This is a case where the extension amount L of the telescopic spray bar 7 is set to 3250 mm. In this case, there are five emulsion nozzles 10 and five decomposing agent nozzles 14 on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. When the emulsion spraying is performed in which the switches for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state are turned on, in the overlapping portion W, the three emulsion nozzles 10 in the left spray bar 7A. And the decomposing agent nozzle 14 are set in a spraying state, and the remaining two emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a non-spraying state. In the right spray bar 7B, on the contrary, the three emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a non-spraying state, and the remaining two emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a spraying state. At this time, the two decomposing agent nozzles 14 set in the non-spraying state on the left spray bar 7A are covered with the cover 15a, and the three decomposing agents set in the non-spraying state on the right spray bar 7B. The nozzle 14 is covered with a cover 15b. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spreading state on the left and right spray bars 7A and 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 3D) This is a case where the extension amount L of the telescopic spray bar 7 is set to 3500 mm. In this case, five emulsion nozzles 10 are provided on each of the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap, as in the case of FIG. And a decomposer nozzle 14 is present. When the emulsion spraying is performed in which the switches for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state are turned on, in the overlapping portion W, the two spray nozzles 10 in the left spray bar 7A. In the right spray bar 7B, on the contrary, the three emulsion nozzles 10 and the decomposing agent nozzle 14 are set in the non-spraying state. At this time, the two decomposing agent nozzles 14 set in the non-spraying state on the left spray bar 7A are covered with the cover 15a, and the three decomposing agents set in the non-spraying state on the right spray bar 7B. The nozzle 14 is covered with a cover 15b. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spreading state on the left and right spray bars 7A and 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 4A) This is a case where the extension amount L of the telescopic spray bar 7 is set to 3750 mm. In this case, there are four emulsion nozzles 10 and four decomposing agent nozzles 14 on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. When the emulsion spraying is performed in which the switches for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state are turned on, in the overlapping portion W, the two spray nozzles 10 in the left spray bar 7A. And the decomposing agent nozzle 14 are set in a spraying state, and the remaining two emulsion nozzles 10 and the decomposing agent nozzle 14 are set in a non-spraying state. In the right spray bar 7B, similarly, the two emulsion nozzles 10 and the decomposing agent nozzle 14 are set in the non-spreading state, and the remaining two emulsion nozzles 10 and the decomposing agent nozzle 14 are set in the spraying state. At this time, the two decomposing agent nozzles 14 set in the non-spraying state on the left spray bar 7A are covered with the cover 15a, and the two decomposing agents set in the non-spraying state on the right spray bar 7B. The nozzle 14 is covered with a cover 15b. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spreading state on the left and right spray bars 7A and 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 4B) This is a case where the extension amount L at the time of the maximum extension of the telescopic spray bar 7 is set to 6000 mm. In this case, since there is no portion W where the left and right spray bars 7A and 7B overlap, there is no decomposing agent nozzle 14 to be covered with the covers 15a and 15b.

As described above, even if the length of the portion W where the left and right spray bars 7A, 7B overlap varies according to the amount of expansion / contraction, the required length of the covers 15a, 15b
Since each of the decomposing agent nozzles 14 set in the non-spraying state on the left and right spray bars 7A and 7B is fixedly attached to the portion 15b, the covers 15a and 15b having the required lengths are used. Each is reliably covered to prevent the emulsion from scattering to the decomposer nozzle 14.

  As described above, in the structure for preventing clogging of the decomposing agent nozzle in the road paving machine according to the present embodiment, the left and right spray bars 7A and 7B are provided in accordance with the amount of expansion / contraction of the extendable spray bar 7 during emulsion dispersion. By providing the cover 15a, 15b of the required length for the part of the decomposing agent nozzle 14 set in the non-spraying state on the left and right spray bars 7A, 7B in the overlapping part W, It is possible to effectively prevent the emulsion from being scattered to the decomposing agent nozzles 14 and to reliably prevent the decomposing agent nozzles 14 from being clogged.

  Further, even if the length of the portion W where the left and right spray bars 7A and 7B overlap is changed according to the amount of expansion and contraction of the telescopic spray bar 7, the length of the left and right spray bars 7A and 7B is not changed when the emulsion is dispersed. The part of the decomposing agent nozzle 14 set in the spraying state can be reliably covered with the covers 15a and 15b having a required length.

  A clogging prevention structure for a decomposing agent nozzle in a road paving machine according to Embodiment 2 of the present invention will be described with reference to FIGS. 5 and 6, the same or equivalent members and parts in FIGS. 1 and 2 are denoted by the same reference numerals as above unless otherwise indicated. First, the structure of the clogging prevention structure of the decomposition agent nozzle in the road paving machine according to the present embodiment will be described with reference to FIGS. 5 and 6.

  In the present embodiment, in accordance with the amount of expansion / contraction of the telescopic spray bar 7, the portion of the decomposer nozzle 14 set to the non-spraying state on the right spray bar 7B in the portion W where the left and right spray bars 7A and 7B overlap. On the other hand, in order to prevent emulsion scattering and clogging, a cover 15 having a length substantially equal to the entire length of the right spray bar 7B is provided from the left spray bar 7A side to the right spray bar 7B side. As shown in FIGS. 5 and 6, the cover 15 is movably mounted on a guide rail 16 provided on the lower frame 4b via a guide roller 17, and is attached to the end of the left spray bar 7A. It is supported by the support arm 18 and moves integrally with the movement of the left spray bar 7A.

  The cover 15 may be provided from the right spray bar 7B side to the left spray bar 7A side contrary to the above. That is, the cover 15 is movably mounted on a guide rail provided on the lower frame 4a via a guide roller, and supported by a support arm attached to the end of the right spray bar 7B so that the right spray bar 7B moves. It is also possible to move it together.

  Next, the action of the clogging prevention structure of the decomposing agent nozzle in the road paving machine configured as described above will be concretely described with reference to FIGS. 7 (a) to (d) and FIGS. 8 (a) and 8 (b). A description will be given together with typical numerical examples.

(FIG. 7A) When the telescopic spray bar 7 is contracted, the switch for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state is turned on. . In this case, the overlapping portion W of the left and right spray bars 7A and 7B has substantially the entire length. In the overlapping portion W, there are six emulsion nozzles 10 and decomposer nozzles 14 on the left and right spray bars 7A and 7B, respectively. In the left spray bar 7A, all of the six emulsion nozzles 10 and the decomposing agent nozzle 14 are set in the spraying state, and in the right spray bar 7B, all of the six emulsion nozzles 10 and the decomposing agent nozzle 14 are set in the non-spreading state. Is done. At this time, the six decomposing agent nozzles 14 set in the non-spraying state on the right spray bar 7B are covered with the cover 15. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spraying state on the right spray bar 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 7B) This is a case where the extension amount L of the telescopic spray bar 7 is set to 3250 mm. In this case, there are five emulsion nozzles 10 and five decomposing agent nozzles 14 on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. When the emulsion spraying is performed in which the switches for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state are turned on, in the overlapping portion W, the five emulsion nozzles 10 in the left spray bar 7A. All of the decomposing agent nozzles 14 are set in the spraying state, and in the right spray bar 7B, on the contrary, all of the five emulsion nozzles 10 and the decomposing agent nozzles 14 are set in the non-spraying state. At this time, the five decomposing agent nozzles 14 set in the non-spraying state on the right spray bar 7B are covered with the cover 15. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set in the non-spraying state on the right spray bar 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 7C) This is a case where the extension amount L of the telescopic spray bar 7 is set to 3750 mm. In this case, there are four emulsion nozzles 10 and four decomposing agent nozzles 14 on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. When the emulsion nozzles 10 and the decomposer nozzles 14 in the left and right spray bars 7A and 7B are turned on, the four spray nozzles 10 in the left spray bar 7A are overlapped at the overlapping portion W. All of the decomposing agent nozzles 14 are set in the spraying state, and in the right spray bar 7B, on the contrary, all of the four emulsion nozzles 10 and the decomposing agent nozzles 14 are set in the non-spraying state. At this time, the four decomposing agent nozzles 14 set in the non-spraying state on the right spray bar 7B are covered with the cover 15. As a result, the emulsion is prevented from scattering to the decomposing agent nozzle 14 set to the non-spraying state on the right spray 7B, and the decomposing agent nozzle 14 is prevented from being clogged.

  (FIG. 7D) This is a case where the extension amount L of the telescopic spray bar 7 is set to 4500 mm. In this case, there are three emulsion nozzles 10 and three decomposing agent nozzles 14 on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. When the emulsion spraying is performed in which the switches for switching the emulsion nozzle 10 and the decomposing agent nozzle 14 in the left and right spray bars 7A and 7B to the spraying state are turned on, in the overlapping portion W, the three emulsion nozzles 10 in the left spray bar 7A. All of the decomposing agent nozzles 14 are set in the spraying state, and in the right spray bar 7B, on the contrary, all of the three emulsion nozzles 10 and the decomposing agent nozzles 14 are set in the non-spraying state. At this time, the three decomposing agent nozzles 14 set in the non-spraying state on the right spray bar 7B are covered with the cover 15. As a result, the emulsion is prevented from splashing to the three decomposer nozzles 14 set in the non-spraying state on the right spray bar 7B, and the three decomposer nozzles 14 are prevented from being clogged.

(FIG. 8A) This is a case where the extension amount L of the telescopic spray bar 7 is set to 5500 mm. In this case, one emulsion nozzle 10 and one decomposing agent nozzle 14 exist on the left and right spray bars 7A and 7B in the portion W where the left and right spray bars 7A and 7B overlap. At the time of emulsion spraying, in the overlapping portion W, one emulsion nozzle 10 and decomposing agent nozzle 14 are set in the spraying state in the left spray bar 7A, and conversely in the right spray bar 7B, one emulsion nozzle 10 And the decomposition agent nozzle 14 is set to a non-spreading state. At this time, the single decomposer nozzle 14 set in the non-spraying state on the right spray bar 7B is covered with the cover 15. As a result, the emulsion is prevented from scattering to one disintegrant nozzle 14 set in the non-spraying state on the right spray bar 7B, and the one disintegrant nozzle 14 is prevented from being clogged.

  (FIG. 8B) This is a case where the extension amount L at the time of maximum extension of the telescopic spray bar 7 is set to 6000 mm. In this case, since there is no portion W where the left and right spray bars 7A and 7B overlap, there is no decomposing agent nozzle 14 to be covered with the cover 15.

  As described above, in the structure for preventing clogging of the decomposing agent nozzle in the road paving machine according to the present embodiment, the left and right spray bars 7A and 7B are provided in accordance with the amount of expansion / contraction of the extendable spray bar 7 during emulsion dispersion. When the decomposer nozzle 14 that is in a non-spraying state is set only on one of the spray bars 7A or 7B in the overlapping portion W, a cover 15 having a required length is provided for the decomposer nozzle 14 portion. As a result, it is possible to effectively prevent the emulsion from being scattered to the decomposer nozzle 14 and to reliably prevent clogging of the decomposer nozzle 14 in a non-sprayed state.

  As described above, depending on the type of road paving machine, the required length of the cover 15 may be provided only on the spray bar 7A or 7B side of the left or right spray bar 7A or 7B. The number of parts is reduced, and the configuration becomes easy.

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

  When there is a device that prevents the emulsion from splashing in addition to the decomposer nozzle at the portion where the two spray bars overlap each other according to the amount of expansion and contraction when the emulsion is spread, It can be applied to applications where it is essential to prevent them reliably.

DESCRIPTION OF SYMBOLS 1 Airframe 2 Rear wheel 3 Bottom plate 4a, 4b Lower frame 5 Support shaft 6 Spray bar cover 7 Telescopic spray bar 7A, 7B Left and right spray bar 8a, 8b Rollers 9a, 9b Slide member 10 Emulsion nozzle 11 Support member 12a , 12b Guide roller 13a, 13b Left and right spray bar cover 14 Decomposition agent nozzle 15 Cover 16 Guide rail 17 Guide roller 18 Support arm

Claims (5)

A plurality of emulsion nozzles are provided at appropriate intervals, and each of the plurality of emulsion nozzles is provided with a spray bar provided with a decomposer nozzle for spraying a decomposer that accelerates hardening of the emulsion sprayed from the emulsion nozzle. The two are structures for preventing clogging of the decomposing agent nozzle in a road pavement machine having a telescopic spray bar arranged in parallel before and after the aircraft traveling direction,
Depending on the amount of expansion / contraction of the telescopic spray bar, the other spray is applied to the decomposing agent nozzle set in a non-spraying state on at least one of the two spray bars in the overlapping portion. A clogging of the decomposing agent nozzle in a road pavement machine, comprising a cover having a required length to prevent the emulsion spraying from the emulsion nozzle on the bar from scattering and preventing the decomposing agent nozzle from clogging. Prevention structure.   According to the amount of expansion / contraction of the telescopic spray bar, a cover having a required length is provided for each part of the decomposing agent nozzle that is set in a non-spraying state on both spray bars in a portion where the two spray bars overlap each other. The clogging prevention structure of the decomposition agent nozzle in the road pavement machine according to claim 1 provided.   In the case where the disintegrant nozzle that is in a non-spraying state is set only on one spray bar in a portion where the two spray bars overlap according to the amount of expansion / contraction of the telescopic spray bar, the non-spraying state is set. 2. The structure for preventing clogging of a decomposing agent nozzle in a road paving machine according to claim 1, wherein a cover having a required length is provided for the decomposing agent nozzle portion.   3. The structure for preventing clogging of a decomposition agent nozzle in a road pavement machine according to claim 1, wherein the cover having the required length is attached to a lower frame portion of the airframe.   The cover of the required length is attached to be movable on a guide rail provided on the lower frame portion of the fuselage via a guide roller, and from the other spray bar on the side far from the cover of the required length. 4. The structure for preventing clogging of a decomposing agent nozzle in a road pavement machine according to claim 1, wherein the structure is moved by a support arm.

Images