Road paving machine and moldboard height adjustment structure used therein

Abstract

To provide a road paving machine capable of easily adjusting the height of a moldboard by integrating the height adjustment mechanism inside and outside the moldboard into the outside of the road paving machine.SOLUTION: A height adjustment mechanism inside moldboards 5a and 5b includes an external rod 30 at the upper part of the moldboards 5a and 5b, an internal rod 40 slidably inserted into the external rod 30, a height adjustment bolt 10 screwed into the inner periphery of the internal rod 40, a rail 60, and a humanoid link 50. The height adjustment mechanism on the outside of the moldboards 5a and 5b includes fixing means attached to the outside of the moldboards 5a and 5b and a height adjustment bolt 20 screwed into the fixing means. By turning the height adjustment bolt 10, the link mechanism is moved to adjust the height of the inside of the moldboards 5a and 5b, and by turning the height adjustment bolt 20, the height of the outside of the moldboards 5a and 5b can be adjusted.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a structure for adjusting the height of a moldboard used in a road paving machine. [Background technology]

[0002] The moldboard is a partition plate that adjusts the amount of mix material poured under the bottom plate of the screed device by adjusting its height from the ground.

[0003] Fig. 9 is a diagram showing a structure for adjusting the height of a moldboard used in a conventional road paving machine. Fig. 9 shows the moldboard and its height adjustment structure on the left side, but a similar structure exists on the right side. As shown in Fig. 9, a conventional road paving machine is provided with mechanisms for adjusting the height of the moldboard at four locations on the left and right sides of the main bottom plate side and the end side of the extended bottom plate. The adjustment mechanism on the main bottom plate side is the inner adjustment bolt shown in Fig. 9. The adjustment mechanism on the end side of the extended bottom plate is the outer adjustment bolt shown in Fig. 9.

[0004] In the case of the structure shown in Figure 9, the height of the inside (referring to the main base plate side of the road paving machine; same below) and outside (referring to the outer surface side of the extended base plate of the road paving machine; same below) of the moldboard can be fine-tuned, making it possible to fine-tune the amount of mix put into the bottom of the base plate and improving the construction accuracy of the road surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-020215 A [Patent Document 2] Patent No. 3713247 [Patent Document 3] JP 2008-190180 A [Patent Document 4] JP 2010-043424 A [Patent Document 5] JP 2010-043425 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of the conventional mechanism shown in FIG. 9, every time the height of the moldboard was adjusted, the operator had to move to the main bottom plate side or to the end side of the extended bottom plate, which resulted in poor work efficiency.

[0007] Patent documents 1 to 5 disclose mechanisms for adjusting the height of the moldboard from a single location on the outside by providing an operating unit on the outside. Although the height of the moldboard may be adjusted by the operating unit described in Patent documents 1 to 5, it is preferable for operators who are accustomed to the operation shown in Fig. 9 to adopt the operating mechanism for finely adjusting the height of the inside and outside of the moldboard as is, since construction accuracy can be maintained.

[0008] Therefore, the present invention aims to provide a road paving machine that can easily adjust the height of the moldboard by consolidating the inner and outer height adjustment mechanisms of the moldboard on the outside of the road paving machine. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention has the following features: The present invention is a height adjustment structure for adjusting the inner and outer heights of a moldboard that slides in accordance with the extension and contraction of a screed device of a road paving machine, which is characterized in that it includes an inner height adjustment mechanism for the moldboard and an outer height adjustment mechanism for the moldboard, and the adjustment means of the inner height adjustment mechanism and the adjustment means of the outer height adjustment mechanism are provided on the side portion of the road paving machine.

[0010] In a preferred embodiment, the inner height adjustment mechanism includes an outer rod provided on the top of the moldboard, an inner rod slidably inserted inside the outer rod, a first height adjustment bolt screwed into the inner circumference of the inner rod and having a head provided on the side of the road paving machine, a rail for sliding the moldboard, and a link mechanism connecting the tip of the inner rod and the rail. It is preferable that the link mechanism be moved by turning the first height adjustment bolt, thereby adjusting the inner height of the moldboard.

[0011] In a preferred embodiment, the outer height adjustment mechanism includes a fixing means attached to the outer side of the moldboard and a second height adjustment bolt screwed into the fixing means. The outer height of the moldboard can be adjusted by turning the second height adjustment bolt.

[0012] In a preferred embodiment, the link mechanism is a humanoid link, an upper portion of the humanoid link is rotatably attached to the rail, one lower portion of the humanoid link is rotatably attached to the inner rod, and the other lower portion of the humanoid link is rotatably attached to the outer rod.

[0013] Preferably, an inner height indication rod is attached to the inner rod, and as the inner rod moves, the tip of the inner height indication rod indicates the inner height gauge, thereby indicating the inner height of the moldboard.

[0014] Preferably, an outer height indication rod is attached to the outside of the moldboard, and by turning the second height adjustment bolt, the outer height indication rod moves up and down to indicate the outer height gauge, thereby indicating the outer height of the moldboard.

[0015] Preferably, the external rod is provided with a grease nipple.

[0016] The present invention also relates to a road paving machine equipped with the above-mentioned moldboard height adjustment structure. Effect of the Invention

[0017] According to the present invention, the adjustment means of the inner height adjustment mechanism and the adjustment means of the outer height adjustment mechanism are provided on the side portions of the road paving machine, so that the inner and outer height adjustment mechanisms of the moldboard are concentrated on the outside of the road paving machine, thereby providing a road paving machine that can easily adjust the height of the moldboard.

[0018] The mechanism for adjusting the inside height of the moldboard using an outer rod, an inner rod, and a first height adjustment bolt, as well as a link mechanism, is practical because it allows the inside height adjustment to be reliably adjusted.

[0019] The mechanism for adjusting the outer height of the moldboard using the fixing means and the second height adjustment bolt is practical because it allows the outer height adjustment to be reliably adjusted.

[0020] By using a human-shaped link as the link mechanism, the inner height adjustment can be reliably adjusted, which is practical.

[0021] Using an inside height gauge, the inside height of the moldboard can be easily checked even from the side of the road paving machine.

[0022] Using an outside height gauge, the outside height of the moldboard can be easily checked even from the side of the road paver.

[0023] The use of grease nipples makes it easy to maintain the inner rod sliding within the outer rod.

[0024] These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0025] [Figure 1A]FIG. 1A is a perspective view of a road paving machine 1 according to an embodiment of the present invention, as viewed from diagonally above and to the right rear. [Figure 1B] FIG. 1B is an enlarged perspective view of the inner height-adjusting bolt 10 and the outer height-adjusting bolt 20 of the right moldboard 5a in FIG. 1A. [Figure 2A] Fig. 2A is a rear view of a portion having the left and right moldboards 5a, 5b. Note that in Fig. 2A and subsequent figures, the rotation prevention brackets 10a, 20a for the height adjustment bolts 10, 20 on the moldboard 8a side are omitted. [Figure 2B] FIG. 2B is an enlarged rear view of a portion of the mold board 5a on the right side in FIG. 2A. [Diagram 3] FIG. 3 is a front view of a portion having left and right mold boards 5a and 5b. [Figure 4] FIG. 4 is a perspective view of a portion having left and right moldboards 5a, 5b as viewed from diagonally above and behind on the right. [Diagram 5] FIG. 5 is a perspective view of a portion having left and right moldboards 5a, 5b as viewed from diagonally above and to the front on the right. [Figure 6] FIG. 6 is a perspective view showing only the height adjustment mechanisms of the mold boards 5a and 5b in FIG. [Figure 7] FIG. 7 is a longitudinal sectional view taken along the A plane of FIG. [Figure 8] Fig. 8 is a vertical cross-sectional view taken along the B surface of Fig. 6. Fig. 8 also shows a conceptual diagram of relief when the inside and outside of the mold board 5a are higher. [Figure 9] FIG. 9 is a diagram showing a structure for adjusting the height of a moldboard used in a conventional road paving machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] As shown in Figures 1A and 2A, a road paving machine 1 according to one embodiment of the present invention generally includes a hopper 2, a bar feeder 3, a screw 4, left and right moldboards 5a, 5b, a screed device 6, a working step 7, and a center board 8.

[0027] The asphalt mixture placed in the hopper 2 is sent to the rear of the vehicle by the bar feeder 3. The asphalt mixture sent from the bar feeder 3 is spread to the left and right by the screw 4. The asphalt mixture spread to the left and right is sent in front of the central board 8 and the left and right moldboards 5a, 5b. As the road paving machine 1 moves forward, the asphalt mixture is sent to the screed device 6 from below the central board 8 and the moldboards 5a, 5b. The screed device 6 spreads and levels the sent asphalt mixture.

[0028] This embodiment is characterized by a structure for adjusting the height of the inside and outside of the moldboards 5a and 5b. This height adjustment structure will be described in detail below. In addition, the height adjustment structure of the right moldboard 5a and the height adjustment structure of the left moldboard 5b are similar, so in the following description, unless otherwise specified, the height adjustment structure of the right moldboard 5a will be mainly described, and the description of the height adjustment structure of the moldboard 5b will be omitted.

[0029] Here, left and right refer to the left and right with respect to the traveling direction of the road paving machine (diagonally upper right direction in FIG. 1A). The effect can be obtained if the height adjustment structure of the present invention is adopted for at least one of the left and right moldboards 5a, 5b, and preferably, the height adjustment structure of the present invention is adopted for both.

[0030] As shown in Fig. 1B, the height adjustment of the moldboard 5a is achieved by height adjustment bolts 10 and 20. The height adjustment bolts 10 and 20 are provided on the outside of the moldboard 5a. Anti-rotation brackets 10a and 20a for preventing the height adjustment bolts 10 and 20 from rotating unintentionally are rotatably attached to the moldboard 5a. When turning the height adjustment bolts 10 and 20, the anti-rotation brackets 10a and 20a are raised and operated.

[0031] The height adjustment bolts 10 are height adjustment means for adjusting the inner height of the moldboards 5a, 5b.

[0032] The height adjustment nuts 20 are height adjustment means for adjusting the outer height of the moldboards 5a, 5b.

[0033] As shown in Figures 2A to 6, the height adjustment structure of the moldboards 5a, 5b includes height adjustment bolts 10, 10, height adjustment bolts 20, 20, outer rods 30, 30, inner rods 40, 40, human-shaped links 50, 50, rails 60, 60, an inner height control rod 70, an inner height gauge 71, an outer height control rod 72, and an outer height gauge 73.

[0034] The height adjustment bolt 10 is a bolt for adjusting the inner height (arrow a in FIG. 2A) of the mold boards 5a and 5b.

[0035] The height adjustment bolt 20 is a bolt for adjusting the outer height (arrow b in FIG. 2A) of the moldboards 5a and 5b.

[0036] Moldboards 5a, 5b are fixed to the external rods 30, 30. A height adjustment bolt 10 and internal rods 40, 40 are inserted into the external rods 30, 30. An internal height adjustment structure is present inside the external rods 30, 30. The external rods 30, 30 may be provided with grease nipples for injecting grease as appropriate.

[0037] The upper ends of the human-shaped links 50,50 are slidably attached to the rails 60,60. A well-known mechanism such as a bearing is used for the sliding structure. One lower end of the human-shaped links 50,50 is rotatably attached to one end of the inner rod 40,40. The other lower end of the human-shaped links 50,50 is rotatably attached to the outer rod 30,30.

[0038] The inner height indication rods 70, 70 are attached parallel to the inner rods 40, 40. The inner height gauges 71 are attached to the outside of the moldboards 5a, 5b.

[0039] As described later, when the height adjustment bolt 10 is rotated, the inner rods 40, 40 move left and right inside the outer rods 30, 30, and the opening and closing interval of the human-shaped links 50, 50 changes accordingly, adjusting the inner height of the moldboards 5a, 5b. At that time, the control rods 70, 70 move together with the inner rods 40, 40, so the position indicated by the inner height gauge 71 indicated by the tip of the control rods 70, 70 changes. This makes it possible to check the inner height of the moldboards 5a, 5b.

[0040] The outside height indication rod 72 is attached to the outside end of the moldboards 5a, 5b. The outside height gauge 73 is attached to a position that is not linked to changes in the height of the moldboards 5a, 5b. If the outside height of the moldboards 5a, 5b changes, the height of the outside height indication rod 72 changes, and the position indicated by the outside height gauge 73 changes. This makes it possible to check the outside height of the moldboards 5a, 5b.

[0041] Next, the mechanism for adjusting the height inside the moldboard 5a will be described in detail with reference to Fig. 7. The inner rod 40 is slidably inserted inside the outer rod 30. A thread groove is cut on the inner circumference of the inner rod 40 (only the height adjustment bolt 10 side is required). The height adjustment bolt 10 is inserted from the end of the outer rod 30 and screwed into the thread groove on the inner circumference of the inner rod 40.

[0042] A structure for supporting the external rod 30 is provided on the side of the screed device 6 as appropriate. The support structure for the external rod 30 is provided with a suitable amount of play (escape) for adjusting the height of the inside and outside. As an escape for adjusting the height of the moldboard 5a, a larger hole in the fixing part 23 is adopted here. Specifically, as shown in FIG. 8 when the inside is higher and when the outside is higher, the hole in the fixing part 23 is made larger so that the moldboard 5a can be tilted inward and outward. The long hole 80 provided in the moldboard 5a functions when the moldboard 5a follows the extension / retraction direction when the screed is extended and also functions during the escape described above. However, since there are various escape means, the escape means is not limited to the above.

[0043] When the height adjustment bolt 10 is turned, the internal rod 40 moves in the direction of the arrow c in Fig. 7. Accordingly, the human-shaped link 50 opens and closes in the direction of the arrow d. At that time, the upper end of the human-shaped link 50 slides in the direction of the arrow e. With this link structure, the height of the inside of the moldboard 5a in the direction of the arrow a can be adjusted by turning the height adjustment bolt 10.

[0044] Next, the mechanism for adjusting the height of the outside of the moldboard 5a will be described in detail with reference to Fig. 8. The fixing part 23 is fixed to the external rod 30. The support part 24 is attached to the side of the screed device 6. A thread groove is cut in the part between the support part 24 and the height adjustment nut 20.

[0045] A height adjustment bolt 20 is inserted into the fixed portion 23. A nut 21 is provided at the bottom of the fixed portion 23 with the height adjustment bolt 20 inserted therein. The nut 21 is not fixed to the fixed portion 23. The fixed portion 23 and the nut 21 are collectively referred to as the fixing means.

[0046] By turning the height adjustment bolt 20, the height of the fixing part 23 resting on the nut 21 changes. Since the fixing part 23 is fixed to the moldboard 5a, the outer height of the moldboard 5a is adjusted.

[0047] In this way, according to this embodiment, the inner and outer heights of the moldboards 5a, 5b can be adjusted separately. And, since these height adjustment functions are concentrated on the outer left and right sides of the road paving machine 1, it becomes possible to easily adjust the heights of the moldboards 5a, 5b.

[0048] (Modification) In the above embodiment, the mandrel links 50, 50 are used to adjust the inner height of the moldboards 5a, 5b, but links other than mandrel links may be used as long as the link changes in height by rotating the height adjustment bolt 10. That is, in the present invention, it is sufficient to use a link mechanism that changes the inner height of the moldboards 5a, 5b when the height adjustment bolt 10 for adjusting the inner height of the moldboards 5a, 5b is rotated.

[0049] In the above embodiment, the height adjustment bolts 10, 20 are illustrated as having heads that can be turned with a hexagonal spanner, but they may also have heads that can be turned with a hexagonal wrench or a screwdriver.

[0050] The height adjustment bolts 10, 20 may be wing bolts.

[0051] The present invention is a height adjustment structure for adjusting the inner and outer heights of a moldboard that slides in accordance with the expansion and contraction of a screed device of a road paving machine, and is provided with an inner height adjustment mechanism of the moldboard and an outer height adjustment mechanism of the moldboard. The adjustment means (e.g., bolts) of the inner height adjustment mechanism and the adjustment means (e.g., bolts) of the outer height adjustment mechanism are provided on the side of the road paving machine. Therefore, the inner and outer height adjustment functions shown in the above embodiment are merely examples, and any structure may be used.

[0052] Although the present invention has been described in detail above, the above description is merely illustrative of the present invention in every respect and is not intended to limit the scope of the present invention. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. Each of the constituent elements of the invention disclosed in this specification is considered to be an independent invention. Inventions in which each of the constituent elements is combined in any combination method are also included in the present invention. [Industrial Applicability]

[0053] INDUSTRIAL APPLICABILITY The present invention relates to a road paving machine and a height adjustment structure for a moldboard used therein, and is industrially applicable. [Explanation of symbols]

[0054] 1. Road paving machines 2 Hopper 3. Bar Feeder 4 Screw 5a,5b Moldboard 6 Screeding equipment 7 Working Steps 8. Center Board 10 Height adjustment bolt for adjusting the inner height of the mold boards 5a and 5b (first height adjustment bolt, inner height adjustment means) 10a, 20a Anti-rotation bracket 20 Height adjustment bolt for adjusting the outer height of the moldboards 5a and 5b (second height adjustment bolt, outer height adjustment means) 21 Nut 23 Fixed part 24 Support part 30 External Rod 40 Inner Rod 50 Humanoid Links 60 Rail 70 Inner height indication rod 71 Inner Height Gauge 72 Outside height indication rod 73 Outside Height Gauge 80 Slot

Claims

1. A height adjustment structure for adjusting the inner and outer heights of a sliding moldboard in accordance with the expansion and contraction of a screed device of a road paving machine, A height adjustment mechanism on the inside of the mold board and a height adjustment mechanism on the outside of the mold board, A moldboard height adjustment structure, characterized in that the adjustment means of the inner height adjustment mechanism and the adjustment means of the outer height adjustment mechanism are provided on the side portions of the road paving machine.

2. The inner height adjustment mechanism is an external rod provided on the upper portion of the moldboard; an inner rod slidably inserted within the outer rod; A first height adjustment bolt that is screwed into the inner periphery of the inner rod and has a head provided on a side surface of the road paving machine; a rail for sliding the moldboard; a link mechanism that connects a tip of the internal rod and the rail, 2. The moldboard height adjustment structure according to claim 1, wherein the link mechanism is moved by turning the first height adjustment bolt, thereby enabling the inner height of the moldboard to be adjusted.

3. The outer height adjustment mechanism is a fastening means attached to the exterior of the moldboard; a second height adjustment bolt screwed into the fixing means; 3. The moldboard height adjustment structure according to claim 2, wherein the outer height of the moldboard can be adjusted by turning the second height adjustment bolt.

4. the link mechanism is a human-shaped link, An upper portion of the human link is rotatably attached to the rail, One lower portion of the human link is rotatably attached to the inner rod, 4. The moldboard height adjustment structure according to claim 2, wherein the other lower part of the human link is rotatably attached to the external rod.

5. An inner height indicator rod is attached to the inner rod; The moldboard height adjustment structure according to any one of claims 2 to 4, characterized in that the tip of the inner height indication rod indicates an inner height gauge in accordance with the movement of the internal rod, thereby indicating the inner height of the moldboard.

6. An outer height indicator rod is attached to the outer side of the moldboard; 4. The moldboard height adjustment structure according to claim 3, characterized in that by turning the second height adjustment bolt, the outer height indication rod moves up and down to indicate the outer height gauge, thereby indicating the outer height of the moldboard.

7. 7. The moldboard height adjustment structure according to claim 2, wherein the external rod is provided with a grease nipple.

8. A road paving machine comprising the moldboard height adjustment structure according to any one of claims 1 to 7.

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