Plate compactor

Abstract

To provide a plate compactor that has improved retention of an asphalt anti-adhesion agent on the roll-pressing surface of a roll-pressing part.SOLUTION: The plate compactor has a roll-pressing part 11. Multiple grooves 114 are provided on a roll-pressing surface 111A that contacts to-be-roll-pressed objects of the roll-pressing part 11.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a plate compactor provided with a rolling part.

Background Art

[0002] Patent Document 1 discloses a plate compactor that compacts a paving body formed of an asphalt mixture by causing a rolling part to vibrate while traveling.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, an asphalt mixture is obtained by mixing asphalt with crushed stones, sand, etc. Since asphalt has high adhesiveness, there is a problem that the asphalt mixture adheres to the rolling surface on the lower surface of the rolling part.

[0005] Therefore, conventionally, by applying a liquid asphalt adhesion preventive agent to the rolling surface, a film is formed between the rolling surface and the asphalt mixture to prevent the adhesion of the asphalt mixture. However, since the asphalt adhesion preventive agent is liquid and easily falls off the rolling surface, it is necessary to frequently apply the asphalt adhesion preventive agent to the rolling surface.

[0006] An object of the present disclosure is to provide a plate compactor in which the holding power of an asphalt adhesion preventive agent on the rolling surface of a rolling part is improved.

Means for Solving the Problems

[0007] One aspect for achieving the above object is a plate compactor provided with a rolling part, Multiple grooves are provided on the pressure-pressing surface of the pressure-pressing part that comes into contact with the object being pressed. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a plate compactor in which the retention force of the asphalt adhesion inhibitor on the compacted surface of the compacted portion is improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a side view illustrating the configuration of the plate compactor according to this embodiment. [Figure 2] Figure 1 is a perspective view illustrating the configuration of the cushioning section. [Figure 3] This is a cross-sectional view showing the configuration of the section along line III-III in Figure 2, viewed from the direction of the arrow. [Figure 4] This is a bottom view of the cushioning area in Figure 2. [Figure 5] This is a partial cross-sectional view of the compression area, including the compression surface shown in Figure 2. [Figure 6] This is a bottom view showing a modified version of the compression section. [Modes for carrying out the invention]

[0010] The embodiments will be described in detail below with reference to the attached drawings. In the drawings used in the following description, the scale has been appropriately changed to make each element recognizable. In the drawings, arrow U indicates the upward direction of the illustrated structure. Arrow D indicates the downward direction of the illustrated structure. Arrow F indicates the forward direction of the illustrated structure. Arrow B indicates the backward direction of the illustrated structure. Arrow R indicates the rightward direction of the illustrated structure. Arrow L indicates the leftward direction of the illustrated structure. These directions are relative directions set for the plate compactor 10 shown in Figure 1, with the forward direction being the direction of travel of the plate compactor 10.

[0011] Figure 1 illustrates the configuration of the plate compactor 10 according to this embodiment. The plate compactor 10 is a device that vibrates as it travels over the object to be compacted, thereby compacting the object. The object to be compacted is, for example, a pavement formed from an asphalt mixture containing sand, crushed stone, stone powder, and asphalt.

[0012] As illustrated in Figure 1, the plate compactor 10 includes a compression unit 11, a prime mover 12, a base unit 13, a vibration unit 14, a connecting unit 15, and a handle 16.

[0013] The compression section 11 is a metal component that comes into contact with the object to be compressed. For example, the compression section 11 is formed by processing an iron plate or by casting. The compression section 11 has a front section 11A that supports the vibration section 14 and a rear section 11B that supports the prime mover 12.

[0014] The prime mover 12 is a drive source that generates power, such as an engine. As illustrated in Figure 1, a drive pulley 122 is attached to the output shaft 121 of the prime mover 12.

[0015] The base portion 13 is the part that fixes the prime mover 12 to the compression section 11. The base portion 13 is connected to the rear portion 11B of the compression section 11. The base portion 13 comprises a mounting portion 131 and side plate portions 132. The prime mover 12 is fixed to the upper surface of the mounting portion 131. The side plate portions 132 extend downward from the left and right ends of the mounting portion 131 and also extend along the front-rear direction. The side plate portions 132 are fastened to the reinforcing ribs 113 of the compression section 11 by bolts 133 via cushioning members (not shown).

[0016] The vibration generator 14 is configured to vibrate the compression unit 11 using the power of the prime mover 12. The vibration generator 14 has a vibration shaft 141. A driven pulley 142 is attached to the end of the vibration shaft 141. The vibration generator 14 further has a vibration case 143, as illustrated in Figure 2. In this example, the vibration case 143 is formed integrally with the compression unit 11.

[0017] As illustrated in FIG. 1, the connecting portion 15 is a member that rotatably connects the driving pulley 122 and the driven pulley 142. For example, the connecting portion 15 is an endless belt wound between the driving pulley 122 and the driven pulley 142. By the connecting portion 15, the rotational driving force of the output shaft 121 of the prime mover 12 is transmitted to the oscillating shaft 141 of the oscillating portion 14, and the oscillating portion 14 vibrates. The vibration of the oscillating portion 14 is transmitted to the compressing portion 11, and the object to be compressed is tightened by the vibrating compressing surface 111A of the compressing portion 11.

[0018] The handle 16 is gripped by an operator to operate the traveling direction of the plate compactor 10. The proximal end portion of the handle 16 is connected to the rear portion of the base portion 13. The handle 16 is configured to be tiltable in the front-rear direction as shown by the two-dot chain line in FIG. 1.

[0019] As illustrated in FIGS. 2 and 3, the compressing portion 11 has a substrate portion 111, an edge portion 112, and a reinforcing rib 113. The substrate portion 111 is a substantially rectangular plate-shaped member extending in the traveling direction (in this example, the front-rear direction) of the plate compactor 10. The lower surface of the substrate portion 111 contacts the object to be compressed. In other words, the lower surface of the substrate portion 111 forms a compressing surface 111A that contacts the object to be compressed. The compressing surface 111A extends in the traveling direction of the plate compactor 10.

[0020] The edge portion 112 extends upward from the outer peripheral edge of the substrate portion 111. The edge portion 112 suppresses the entry of asphalt mixture or the like into the upper surface of the compressing portion 11. The reinforcing rib 113 is formed to extend in a plate shape in the front-rear direction and to rise from the substrate portion 111. By providing the reinforcing rib 113, the substrate portion 111 extending in the traveling direction is made less likely to bend.

[0021] As illustrated in Figures 3 and 4, the pressure-bearing surface 111A is provided with a plurality of grooves 114. The plurality of grooves 114 are formed, for example, by casting the pressure-bearing section 11 using a mold in which grooves are formed. Alternatively, the plurality of grooves 114 can be formed by applying a processing method such as planar honing to the pressure-bearing surface 111A of the pressure-bearing section 11, which is formed by sheet metal processing or casting, or by grinding it using a grinder, belt sander, or file.

[0022] Each groove 114 is formed to extend along the direction of travel of the plate compactor 10. As used herein, the expression "extending along the direction of travel" means extending in a direction that intersects the direction of travel of the plate compactor 10 at an angle other than 90 degrees. In this example, each groove 114 extends parallel to the direction of travel of the plate compactor 10.

[0023] Multiple grooves 114 are provided in the region of the compression surface 111A that forms the lower surface of the rear portion 11B of the compression section 11. In this example, the multiple grooves 114 are provided behind the center in the longitudinal direction of the compression surface 111A. In other words, if the length of the compression surface 111A in the longitudinal direction is L, the grooves 114 are provided behind a position L / 2 in the longitudinal direction from the front end of the compression surface 111A.

[0024] Multiple grooves 114 are formed at intervals of P in a direction perpendicular to the longitudinal direction (in this example, the left-right direction). The interval P is, for example, 1 to 0.25 mm. For example, 5 to 20 grooves 114 are formed per 5 mm width, and a total of approximately 300 to 1200 grooves 114 are formed on the compaction surface 111A. Note that in Figure 4, for the sake of drawing, fewer grooves 114 are shown than the actual number.

[0025] Each groove 114 may be formed such that its cross-sectional shape perpendicular to the longitudinal direction is approximately semicircular, as shown in Figure 5, for example. The radius R1 of the semicircular cross-sectional shape is, for example, 100 μm to 200 μm. Note that the shape, spacing, number, and size of the grooves 114 are not limited to these examples. For example, if the grooves 114 are formed by grinding with a file or the like, they may not have the clean semicircular shape shown in Figure 5.

[0026] According to the plate compactor 10 of this embodiment, when applying an asphalt adhesion inhibitor to the compaction surface 111A, the asphalt adhesion inhibitor enters the grooves 114 formed in the compaction surface 111A, and is temporarily stored in these grooves 114. During the compaction process, the asphalt adhesion inhibitor stored in the grooves 114 can be supplied to the compaction surface little by little. As a result, the retention capacity of the asphalt adhesion inhibitor on the compaction surface 111A is improved, and the number of times the asphalt adhesion inhibitor needs to be applied to the compaction surface 111A can be reduced.

[0027] In this embodiment, the groove 114 is formed behind the center of the compaction surface 111A in the longitudinal direction. Here, the plate compactor 10 may lift the area in front of the center of the compaction surface 111A in the longitudinal direction from the object to be compacted, while making contact with the area behind the center of the compaction surface 111A in the longitudinal direction. For example, when compacting intensively or when changing the direction of travel, the area in front of the compaction surface 111A is lifted from the object to be compacted more often from the viewpoint of operability. Therefore, asphalt mixture tends to adhere particularly easily to the area behind the compaction surface 111A. However, according to the plate compactor 10 of this embodiment, since the groove 114 is provided behind the center in the longitudinal direction of the compaction surface 111A, the amount of asphalt adhesion inhibitor held increases in the area behind the compaction surface 111A where asphalt mixture is particularly likely to adhere, and adhesion of asphalt mixture to the compaction surface 111A can be suppressed.

[0028] Furthermore, in this embodiment, the groove 114 is provided in the region of the compaction surface 111A that forms the lower surface of the rear portion 11B that supports the motor 12 of the compaction section 11. Here, since the motor 12 is heavier than other parts, the lower surface of the rear portion 11B that supports the motor 12 of the compaction surface 111A contributes efficiently to compaction. For this reason, the lower surface of the rear portion 11B of the compaction surface 111A is often used for compaction. By providing the groove 114 in the region of the compaction surface 111A that forms the lower surface of the rear portion 11B of the compaction section 11, it is possible to efficiently prevent the asphalt mixture from adhering to the compaction surface 111A.

[0029] In this example, the groove 114 is formed in the region that forms the lower surface of the rear portion 11B of the compression surface 111A. In the example described above, the region that forms the lower surface of the rear portion 11B of the compression surface 111A was described as the region that forms the lower surface of the rear portion 11B that supports the prime mover 12 in the compression section 11. That is, in this example, since the front end of the part that supports the prime mover 12 is located near the center in the longitudinal direction, the rear portion 11B of the compression surface 111A is defined as the part that is rearward from the front end of the part that supports the prime mover 12 in the longitudinal direction of the compression surface 111A. However, if the front end of the part supporting the prime mover 12 is located in front of the longitudinal center of the pressure surface 111A (in this case, the rear part 11B is defined as the part from the position in front of the longitudinal center of the pressure surface 111A to the rear), the groove 114 may extend from the longitudinal rear of the lower surface of the pressure surface 111A to the longitudinal center. Alternatively, if the front end of the part supporting the prime mover 12 is located in rear of the longitudinal center of the pressure surface 111A (in this case, the rear part 11B is defined as the part from the position in rear of the longitudinal center of the pressure surface 111A to the rear), the groove 114 may extend from the longitudinal rear of the lower surface of the pressure surface 111A and be interrupted behind the longitudinal center.

[0030] Furthermore, in this embodiment, since the groove 114 extends along the direction of travel of the plate compactor 10, it is less likely that the asphalt adhesion inhibitor stored in the groove 114 will be excessively supplied to the object being compacted. Also, even if fine gravel enters the groove 114, the gravel will be discharged from the rear of the groove 114 as the plate compactor 10 moves, making it less likely for the groove 114 to become clogged with fine gravel.

[0031] The embodiments described above are merely illustrative examples to facilitate understanding of the present invention. The configurations of the embodiments described above can be modified or improved as appropriate without departing from the spirit of the present invention.

[0032] The configuration of the plate compactor 10 is not limited to the configuration illustrated in Figure 1. For example, the prime mover 12 and the vibration exciter 14 may have configurations different from those shown in Figure 1.

[0033] The compression section 11 may have a different configuration from that shown in Figure 2, provided that multiple grooves 114 are formed on the compression surface 111A as shown in Figure 4. For example, a configuration in which the vibration excitation case 143 of the vibration excitation section 14 is not integrated with the compression section 11 may also be adopted.

[0034] In the above embodiment, the multiple grooves 114 are formed parallel to the longitudinal direction of the compaction section 11, as shown in Figure 4. That is, the multiple grooves 114 are formed parallel to the direction of travel of the plate compactor 10. However, the multiple grooves 114 may be formed inclined with respect to the longitudinal direction of the compaction section 11. The multiple grooves 114 may be formed in the same direction or in different directions. Alternatively, the multiple grooves 114 may be formed inclined symmetrically across a center line CL that passes through the center in the width direction of the compaction section 11 and is parallel to the longitudinal direction, as illustrated in Figure 6.

[0035] In the above embodiment, the multiple grooves 114 are formed at regular intervals P apart. However, the multiple grooves 114 may be formed so that their arrangement intervals are not constant.

[0036] In the above embodiment, the multiple grooves 114 are located in the region of the compression surface 111A that forms the lower surface of the rear portion 11B of the compression part 11, and are formed behind the center in the longitudinal direction of the compression surface 111A. However, the multiple grooves 114 may be formed along the entire length in the longitudinal direction of the compression surface 111A, for example, as shown in Figure 6.

[0037] In the above embodiment, the entire area of ​​the lower surface of the substrate portion 111 forms a pressure-bearing surface 111A that contacts the object to be pressed. However, a portion of the lower surface of the substrate portion 111 may be configured to form a pressure-bearing surface 111A that contacts the object to be pressed. Alternatively, the lower surface of the edge portion 112 may also be configured to form a pressure-bearing surface 111A together with the lower surface of the substrate portion 111. [Explanation of Symbols]

[0038] 10: Plate Compactor 11: Pressure-reducing section 11A: Front 11B: Rear 111: Circuit board section 111A: Pressure surface 112: Edge 113: Reinforcement Ribs 114: Groove 12: Prime Engine 121: Output shaft 122: Drive pulley 13: Base section 131: Placement section 132: Side plate part 133: Bolt 14: Excitation part 141: Excitation axis 142: Driven pulley 143: Vibration case 15:Connection part 16: Handle

Claims

[Claim 1] The cushioning section and, The prime mover and A vibration generator that vibrates the pressing section using the power of the prime mover, A plate compactor comprising, The aforementioned pressure-carrying section is, The front part that supports the vibration exciter, It has a rear section that supports the prime mover, The area forming the lower surface of the rear portion of the pressure-pressing surface that contacts the object being pressed has a plurality of grooves. A plate compactor in which each of the plurality of grooves extends parallel to the direction of travel of the plate compactor.

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