Vibratory compaction device

Abstract

In conventional vibratory compaction devices, because a blade part is connected to a base part by welding, thermal distortion occurs, thus presenting the problem in that it is difficult to reduce production costs.　In a vibratory compaction device 10 according to the present invention, a base part 41 and a blade part 42 of a compaction unit 15 are formed as an integral structure by casting using, for example, spherical graphite cast iron. During the production of the base part 41, a step for welding with the blade part 42 is omitted, and thermal distortion does not occur on the inner surface of the base part 41. As a result, during a step for assembling the vibratory compaction device 10, a step for removing the distortion of the base part 41 is omitted, so that work steps and work time are reduced for a worker, thereby reducing the production cost.

Description

Vibration compaction equipment

[0001] The present invention relates to a vibratory compaction device.

[0002] A conventional vibration compaction device 100 has a structure shown in Fig. 6. Fig. 6 is a cross-sectional view illustrating the conventional vibration compaction device 100.

[0003] 6, the vibration compaction device 100 includes a drive unit (not shown) formed of, for example, an engine, and transmits power from the drive unit as vibrations to a compaction unit 102 attached to the tip of a housing unit 101. An operator then pushes the compaction unit 102 into the ballast and vibrates the compaction unit 102 to compact the ballast.

[0004] The compacting unit 102 has an attachment unit 103 and a vibration transmission unit 104. The vibration transmission unit 104 has a cylindrical base 105, a generally conical tip 106, and blades 107. The two blades 107 are welded to the outer circumferential surface of the base 105 (see, for example, Patent Document 1).

[0005] JP 2023-103700 A

[0006] In the vibration compaction device 100, the compaction unit 102 is attached in surface contact with the outer peripheral surface of the housing unit 101. In other words, the housing unit 101 is configured to be fitted into the inside of the base unit 105, and the outer peripheral surface of the housing unit 101 and the inner peripheral surface of the base unit 105 are in close contact with each other. The bearing 109 and the vibration plate 110, which form the vibration unit 108, are assembled so as to be in surface contact with the inner peripheral surface of the housing unit 101.

[0007] As described above, during the assembly of the vibration compaction device 100, the blade 107 is joined to the outer peripheral surface of the base 105 by welding. Therefore, the inner peripheral surface of the base 105 at the welded portion may be distorted toward the inside of the base 105 due to heat generated during welding. If thermal distortion occurs in the base 105, the inner diameter of the base 105 becomes narrower than the design value, making it impossible for the housing 101 to fit inside the base 105. As a result, the assembly work requires a worker to perform a so-called distortion removal process, in which the distorted area on the inner peripheral surface of the base 105 is removed. The additional distortion removal process increases the assembly work time and manufacturing costs.

[0008] The present invention was made in consideration of the above circumstances, and provides a vibration compaction device that shortens assembly time and reduces manufacturing costs by making the blade portion of the compaction section an integrated cast structure as part of the base.

[0009] The vibration compaction device of the present invention comprises a vibration unit, a housing unit that houses the vibration unit inside, a compaction unit that is attached to the tip side of the housing unit, and a plug unit that is arranged inside the compaction unit and fixed to the tip side of the housing unit, and the compaction unit comprises a base unit into which the housing unit is inserted and an attachment unit that is joined to the base, and the base unit has an integral blade unit that protrudes outward from its outer circumferential surface.

[0010] In the vibration compaction device of the present invention, the blade section is integrally formed as part of the base, eliminating the need for a welding process during the manufacture of the base of the compaction unit. This structure eliminates the occurrence of thermal distortion in the base due to the welding process, preventing the inner diameter of the base's internal space from becoming narrower than designed. As a result, workers do not need to perform the distortion removal process when assembling the vibration compaction device, improving work efficiency and reducing manufacturing costs.

[0011] Fig. 1 is a side view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 2 is a side view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 3 is a cross-sectional view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 4 is a perspective view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 5 is an exploded perspective view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 6 is a cross-sectional view illustrating a vibration compaction device according to one embodiment of the present invention. Fig. 7 is a cross-sectional view illustrating a conventional vibration compaction device.

[0012] A vibration compaction device 10 according to one embodiment of the present invention will be described in detail below with reference to the drawings. In describing this embodiment, the same reference numerals will be used for the same components, and repeated explanations will be omitted. The vertical direction of the page indicates the height of the vibration compaction device 10, the horizontal direction of the page indicates the width of the vibration compaction device 10 when viewed from the front, and the front-to-back direction of the page indicates the depth of the vibration compaction device 10 when viewed from the front.

[0013] Figure 1 is a side view illustrating the vibration compaction apparatus 10 of this embodiment, showing the vibration compaction apparatus 10 as viewed from the rear. Figure 2 is a side view illustrating the vibration compaction apparatus 10 of this embodiment, showing the vibration compaction apparatus 10 as viewed from the left side. Figure 3 is a cross-sectional view illustrating the vibration unit 13 of the vibration compaction apparatus 10 of this embodiment. Figure 4A is a perspective view illustrating the plug unit 36 ​​of the vibration compaction apparatus 10 of this embodiment. Figure 4B is an exploded perspective view illustrating the vibration unit 13 of the vibration compaction apparatus 10 of this embodiment. Figure 5 is a cross-sectional view illustrating the connection mechanism 16 of the vibration compaction apparatus 10 of this embodiment.

[0014] As shown in Figures 1 and 2, the vibration compaction device 10 mainly comprises a drive unit 11 consisting of an engine, a fuel tank 12 that stores fuel to be supplied to the drive unit 11, a vibration unit 13 (see Figure 3) that vibrates using power from the drive unit 11, a housing unit 14 that houses the vibration unit 13 inside, a compaction unit 15 that is attached to the tip of the housing unit 14, a connecting mechanism 16 (see Figure 5) that connects the drive rotation shaft 21B (see Figure 5) and the vibration rotation shaft 27 (see Figure 3), vibration-damping rubber 17 that damps vibrations generated by the vibration unit 13 etc., a handle unit 18 that operates the housing unit 14, a support frame 19 that connects to the vibration-damping rubber 17, and an accelerator lever 20.

[0015] An example of the vibratory compaction device 10 is a tie tamper. In the case of a tie tamper, part of the housing 14 and the compaction unit 15 are inserted into the ballast (not shown). The vibratory compaction device 10 mainly transmits vibrations to the ballast below the sleepers (not shown) to compact the ballast. Note that the vibrations transmitted from the vibrating unit 13 are also transmitted to the ballast via the housing 14.

[0016] The drive unit 11 may be, for example, a freely tiltable four-stroke engine such as the GX35 or GX50 manufactured by Honda Motor Co., Ltd., and is driven by fuel supplied from a fuel tank 12. The drive unit 11 is fixed to a first support frame 19A, which is part of the support frame 19, and is disposed in the interior space of the handle portion 18. The fuel tank 12 is disposed adjacent to the side of the drive unit 11, and supplies fuel to the drive unit 11 via a fuel hose (not shown).

[0017] In the vibratory compaction device 10, an accelerator lever 20 is used as the engine lever of the handle portion 18. With this structure, when starting the vibratory compaction device 10, the operator operates the accelerator lever 20 once to lower the accelerator lever 20, and the accelerator lever 20 is maintained in the lowered state. Then, the operator does not need to operate the accelerator lever 20 during work after the start-up, improving convenience.

[0018] With this structure, the vibratory compaction device 10 does not require power to be supplied to the drive unit 11 from an external power source such as a generator, and therefore does not require a power cord to connect the drive unit 11 to the external power source. As a result, the vibratory compaction device 10 is cordless, eliminating the need for workers to transport and install generators and power cords, and also eliminating the need for workers to extend the power cord depending on the work area.

[0019] Furthermore, the operator does not need to handle the power cord carefully to prevent it from getting tangled in the rail (not shown) or the sleepers during operation. As a result, the operator can insert the compaction unit 15 into the ballast via the handle 18 from the direction that is easiest for working on the sleepers, improving work efficiency.

[0020] The housing 14 is a cylindrical pipe member made of, for example, aluminum or an aluminum alloy. The housing 14 has, for example, an inner diameter of 60 mm, a length of 690 mm, and a plate thickness of 5 mm. The upper end of the housing 14 is fixed to the second support frame 19B that constitutes the support frame 19. As will be described in detail later, the vibration rotation shaft 27 and the vibration unit 13 are housed inside the housing 14, causing the housing 14 itself around the vibration unit 13 to vibrate. In other words, the vibration generated by the vibration unit 13 is transmitted to the compaction unit 15 via the housing 14.

[0021] The compaction unit 15 is detachably fixed to the lower end of the housing 14. The user of the vibration compaction device 10 can replace the compaction unit 15 depending on the degree of wear of the compaction unit 15, and can use the vibration compaction device 10 repeatedly.

[0022] The compaction unit 15 includes a base 41 into which the housing 14 is inserted, a blade 42 protruding outward from the outer peripheral surface 41B of the base 41, a mounting portion 43 for attaching and detaching the compaction unit 15 to the housing 14, a mounting plate 44 formed on the mounting portion 43, and a fastener 45 for fastening the mounting plate 44. The base 41 and the blade 42 are formed as an integral structure by casting, for example, using spheroidal graphite cast iron. Furthermore, during the fabrication of the base 41, the welding process for the blade 42 is omitted, and thermal distortion does not occur on the inner surface of the base 41. As a result, during the assembly process of the vibration compaction device 10, the worker does not need to perform a distortion removal process for the base 41, reducing the number of work steps and work time, thereby reducing manufacturing costs. The fastener 45 is, for example, a bolt and nut.

[0023] As shown in the figure, two blade portions 42 are formed on the outer peripheral surface 41B of the base portion 41, and the blade portions 42 are arranged approximately 180 degrees apart. When the vibratory compaction device 10 is in use, a rotational repulsion generated by the drive unit 11 is applied to the handle portion 18, but when the blade portion 42 is inserted into the ballast and catches on the ballast, the rotational repulsion is absorbed by the surface of the blade portion 42. As a result, the rotational reaction force received by the operator from the handle portion 18 is reduced, improving the operability of the vibratory compaction device 10 and improving work efficiency.

[0024] In this embodiment, the mounting plate 44 protrudes in the same direction as the blade 42 (left-right direction on the page). This structure allows the worker to insert the blade 42 below the rail to compact the ballast, but the mounting plate 44 and its fastening hardware 45 are less likely to interfere with the rail. As a result, the worker can easily insert the entire compaction unit 15 into the ballast, even in narrow areas at rail branch points, and the expanded working area improves work efficiency. Furthermore, the compaction unit 15 can be easily inserted below a sleeper (not shown), compacting the ballast below the sleeper and preventing the sleeper from lifting up.

[0025] The mounting portion 43 has a cylindrical shape that is substantially the same as the housing portion 14, and is disposed so as to cover the entire circumference of the housing portion 14. The housing portion 14 is clamped and disposed inside the mounting portion 43. The mounting plate portions 44, which are disposed at both circumferential ends of the mounting portion 43, are fastened with fastening metal fittings 45, thereby mounting the mounting portion 43 to the housing portion 14. The mounting portion 43 is formed, for example, from a carbon steel pipe for mechanical structures, and the mounting portion 43 and the base portion 41 are connected by spot welding.

[0026] 3, the vibration unit 13 is disposed inside the housing 14, and mainly comprises bearings 31, 32, and 33 that rotatably support the vibration rotation shaft 27, and a plurality of vibration plates 34 disposed between the bearings 31, 32, and 33. The bearings 31, 32, and 33 are each disposed inside a bearing housing 39 in a rotatable state, as will be described in detail later.

[0027] The vibration rotation shaft 27 is disposed in the longitudinal direction of the housing 14. The vibration rotation shaft 27 is, for example, a round bar member made of aluminum or an aluminum alloy. Here, the dashed-dotted line 30 indicates the axis 14A of the housing 14, and the vibration rotation shaft 27 is supported by the housing 14 via a plurality of bearings 23 (see FIG. 5), 31, 32, and 33 so that the axis 27A of the vibration rotation shaft 27 substantially coincides with the axis 14A. The vibration rotation shaft 27 is a round bar member, and its torsional strength is improved, making the bearings 23, 31, 32, and 33 less likely to break.

[0028] A plurality of vibration plates 34 are individually fastened to the vibration rotation shaft 27 with bolts. The vibration plates 34 are plate-like bodies that are approximately semicircular in top view and are so-called eccentric cams. With this structure, the vibration plates 34 rotate integrally with the vibration rotation shaft 27, generating vibrations in the vibration unit 13. The vibrations generated in the vibration unit 13 are then transmitted to the housing unit 14 and the compaction unit 15, causing the housing unit 14 and the compaction unit 15 to vibrate. Furthermore, as described above, since the vibration rotation shaft 27 is a round bar member, the mounting length of the bolts that secure the vibration plates 34 is increased, improving mounting strength.

[0029] In this embodiment, the bearings 23, 31, 32, and 33 are disposed inside a ring-shaped bearing housing 39. The bearing housing 39 is disposed inside the housing 14 by, for example, shrink fitting, thereby being fixed to the housing 14 without rotating. Furthermore, the bearing housing 39 is screwed to the housing 14. The bearings 23, 31, 32, and 33 rotate in contact with the bearing housing 39 and support the vibration rotation shaft 27. As shown in FIG. 4 , the bearings 23, 31, 32, and 33 are prevented from falling out of the bearing housing 39 by a locking member 39A. The bearing housing 39 may also be press-fitted into the housing 14 using, for example, a press or the like.

[0030] With this structure, in the area where the vibrating unit 13 is located, the housing unit 14 is supported from its interior side in the extension direction of the housing unit 14 by three bearing housing units 39. When the vibration compaction device 10 is in use, the housing unit 14 is subjected to large stresses due to the vibrations of the vibrating unit 13, but the reinforcing structure using the bearing housing units 39 increases the rigidity of the housing unit 14. As a result, it is possible to use the aluminum alloy mentioned above for the housing unit 14, and the weight of the vibration compaction device 10 can be reduced.

[0031] 3, a storage space 35 for storing the plug portion 36 and the tip side of the housing portion 14 is formed inside the base 41 of the compacting portion 15. The storage space 35 includes a first space 35A that abuts against a tip surface 36C (see FIG. 4A) of the main body portion 36A of the plug portion 36 to position the plug portion 36, and a second space 35B that is formed continuously with the first space 35A. The first space 35A and the second space 35B are each cylindrical, and the centers of the first space 35A and the second space 35B are located on the axis 14A of the housing portion 14, as indicated by the dashed line 30.

[0032] On the other hand, the plug portion 36 is formed, for example, from aluminum or an aluminum alloy, and its surface is anodized. As shown in FIG. 4A , the plug portion 36 includes a main body portion 36A housed in the first space 35A and a mating portion 36B housed in the second space 35B. The main body portion 36A is formed in a cylindrical shape, and its outer peripheral surface 41B is externally threaded, while the inner peripheral surface of the housing portion 14 is internally threaded. The plug portion 36 is fixed to the tip side of the housing portion 14 by screw fastening. The tip surface 36C of the main body portion 36A abuts against the positioning surface 41A of the base portion 41 of the first space 35A, thereby positioning the plug portion 36 and the housing portion 14 relative to the compacting portion 15.

[0033] On the other hand, the fitting portion 36B of the plug portion 36 has an elliptical shape in a plan view and is formed into a substantially elliptical cylindrical shape. The fitting portion 36B is inserted into the second space 35B and fitted into the base 41 so as to bridge the second space 35B. Similarly, the main body portion 36A located outside the housing 14 is fitted into the base 41 of the first space 35A.

[0034] With this structure, vibrations generated in the vibrating unit 13 are also transmitted to the base 41 via the plug 36. As described above, the bearing housing 39 of the bearings 31, 32, and 33 of the vibrating unit 13 is also in close contact with the housing 14. As a result, the compacting unit 15 and the housing 14 vibrate as a unit, reducing the amount of attenuation of the vibrations generated in the vibrating unit 13 and allowing the vibrations to be transmitted efficiently to the ballast.

[0035] 3, in the base 41, the vertical distance L1 from the outer peripheral surface 41B to the corner 35C of the second space 35B is longer than the vertical distance L2 from the outer peripheral surface 41B to the corner 35D of the first space 35A. In other words, in the base 41, the thickness between the outer peripheral surface 41B and the second space 35B is thicker than the thickness between the outer peripheral surface 41B and the first space 35A. Specifically, the vertical distance L1 is approximately 13 mm, and the vertical distance L2 is approximately 9 mm.

[0036] Furthermore, the corners 35C of the second space 35B of the base 41 are curved. As described above, the worker inserts the base 41 into the ballast and compacts it while transmitting vibrations from the vibrating unit 13 to the ballast. Therefore, when the vibration compaction device 10 is in use, stresses such as vibrations and impacts with the ballast are applied to the base 41 from both inside and outside. Therefore, in the base 41 of this embodiment, the thickness around the corners 35C, which are the tip side of the base 41, is increased, thereby increasing durability and making the base 41 less likely to break. Furthermore, by curving the corners 35C, stress is less likely to concentrate on the corners 35C, making the base 41 less likely to break at the corners 35C.

[0037] As indicated by dotted line 37, corner portion 35D of first space 35A of base 41 is formed at a position that overlaps the formation area of ​​blade portion 42 in the horizontal direction of base 41. When using vibration compaction device 10, an operator can also use blade portion 42 to transmit vibration to the ballast and level the ballast by hooking it with blade portion 42. As a result, in the area where blade portion 42 is located, ballast actively comes into contact with blade portion 42, and stress is less likely to be applied to base 41 around corner portion 35D from the inside and outside, making it less likely to break.

[0038] 3, in the vibrating unit 13, a plurality of vibration plates 34 are arranged on the lower end side of the vibration rotation shaft 27. Two of the vibration plates 34 are fixed between bearings 31 and 32, and two other vibration plates 34 are fixed between bearings 32 and 33. In other words, the two vibration plates 34 are arranged inside the housing unit 14, separated by the bearing 32.

[0039] In this embodiment, in the longitudinal direction of the vibrating rotation shaft 27 (the vertical direction on the page), the overlapping area L4 between the arrangement area L3 of the vibration plate 34 and the blade portion 42 of the base 41 is 25% or less of the arrangement area L3, so that vibrations generated in the vibration portion 13 are easily transmitted to the blade portion 42. As described above, the worker can use the blade portion 42 to perform the ballast compaction work, thereby improving work efficiency.

[0040] In other words, by dividing the vibrating plate 34, the amount of vibration generated is reduced compared to when the vibrating plate 34 is integrally arranged, but by widening the overlapping region L4 as much as possible, it is possible to minimize vibration transmission loss and maintain the vibration characteristics of the vibrating compaction device 10. In the vibrating compaction device 10, the length of the overlapping region L4 can be adjusted within a range of 0% to 25% by adjusting the length L5 of the main body 36A of the plug portion 36. For example, by increasing the length L5 of the main body 36A, the length of the overlapping region L4 becomes shorter.

[0041] 5, the drive unit 11 is disposed inside the handle portion 18 and fixed to the first support frame 19A. The drive transmission portion 21 of the drive unit 11 is disposed on the bottom side of the drive unit 11 and transmits power from the drive unit 11 to the vibration rotation shaft 27.

[0042] The drive transmission unit 21 mainly includes a clutch housing 21A that is attached to a clutch (not shown) on the bottom side of the drive unit 11, a drive rotation shaft 21B that is located in the center of the clutch housing 21A, and a bearing 21C that rotatably supports the drive rotation shaft 21B. As the rotation speed of the drive unit 11 increases, a clutch drum inside the clutch housing 21A comes into contact with the clutch and rotates, causing the drive rotation shaft 21B to also rotate. As shown in the figure, the drive transmission unit 21 is inserted into an opening 22 that opens in the center of the first support frame 19A. The drive unit 11 is fastened to the first support frame 19A with bolts.

[0043] The second support frame 19B is disposed below the first support frame 19A. Four vibration-isolating rubber pieces 17 are bolted between the first support frame 19A and the second support frame 19B. The second support frame 19B also has an opening 24 that opens in its center. As described above, the housing 14 is inserted into the opening 24, and the housing 14 is welded to the second support frame 19B. The drive rotation shaft 21B of the drive transmission unit 21 is disposed inside the housing 14.

[0044] The connecting mechanism 16 mainly has a first shaft coupling part 26 attached to the drive rotation shaft 21B of the drive transmission part 21, a second shaft coupling part 28 attached to the vibration rotation shaft 27, and a connecting member 29 connecting the first shaft coupling part 26 and the second shaft coupling part 28.

[0045] The first shaft coupling 26 is, for example, a cylindrical metal cover member, into whose center the drive rotation shaft 21B is inserted. The first shaft coupling 26 and the drive rotation shaft 21B are connected by inserting the tip of a fixing bolt 26B that passes through the first shaft coupling 26 into a rotation prevention groove 26A provided in the drive rotation shaft 21B.

[0046] The second shaft coupling 28 is, for example, a cylindrical metal cover member, into whose center the vibrating rotation shaft 27 is inserted. Then, by inserting a fixing bolt 26B that passes through the second shaft coupling 28 up to a rotation-preventing recess (not shown) provided in the vibrating rotation shaft 27, the second shaft coupling 28 and the vibrating rotation shaft 27 are connected.

[0047] The connecting member 29 is a cylindrical rubber member, and a continuous wave shape is formed on the outer peripheral surface 41B of the connecting member 29 in the circumferential direction. The upper end side of the connecting member 29 is inserted into the first shaft coupling part 26, and the lower end side of the connecting member 29 is inserted into the second shaft coupling part 28. The inner peripheral surfaces of the first and second shaft coupling parts 26, 28 also have wave shapes formed thereon to fit with the wave shapes. With this structure, the vibration rotation shaft 27 rotates integrally with the drive rotation shaft 21B of the drive part 11 via the connection mechanism 16, thereby transmitting the power of the drive part 11 to the vibration part 13.

[0048] Furthermore, the drive rotation shaft 21B and the vibration rotation shaft 27 are connected via the connecting member 29, and a structure is realized in which they are not directly connected to each other. As a result, vibrations generated in the vibrating section 13 are damped by the connecting member 29, and the vibrations transmitted from the vibration rotation shaft 27 to the drive rotation shaft 21B are significantly reduced.

[0049] Here, the dashed-dotted line 30 indicates the axis 14A of the housing 14, and in the drive unit 11, the drive rotation shaft 21B is less susceptible to the influence of vibrations from the vibrating rotation shaft 27, and the drive rotation shaft 21B rotates stably approximately coaxially with the axis 14A indicated by the dashed-dotted line 30. As a result, damage to the components of the drive unit 11 and a shortening of the lifespan of the drive unit 11 are prevented, and the generation of abnormal noise from the drive unit 11 is also prevented.

[0050] As shown in the figure, a bearing 23 is disposed near the connecting member 29 on the upper end side of the vibrating rotation shaft 27, and the vibrating rotation shaft 27 is supported by the housing 14. With this structure, the vibrating rotation shaft 27 rotates stably on approximately the same axis as the axis 14A indicated by the dashed line 30.

[0051] The handle portion 18 has a box-like structure with an internal space, and the tip of the handle portion 18 is fixed to the first support frame 19A. As described above, the first support frame 19A and the second support frame 19B are connected via four vibration-isolating rubbers 17. With this structure, the vibrations transmitted from the vibrating portion 13 to the handle portion 18 are significantly reduced by the vibration-isolating rubbers 17. As a result, vibrations at the worker's hands are significantly reduced, making it easier for the worker to grasp subtle ballast hardness and condition during work, improving work efficiency.

[0052] In this embodiment, an engine is used as the drive unit 11, but the present invention is not limited to this. For example, a battery-powered motor may be used as the drive unit 11. Even in this case, by placing the battery that drives the motor on the top surface of the motor, a cordless power cord can be realized, and the same effects as those described above can be obtained. In addition, various modifications are possible within the scope of the present invention.

[0053] Finally, the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. Furthermore, configurations obtained by combining the configurations of different embodiments described in this specification are also included in the scope of the present invention.

[0054] REFERENCE SIGNS LIST 10 Vibration compaction device 11 Drive unit 12 Fuel tank 13 Vibration unit 14 Housing unit 14A Shaft center 15 Compaction unit 16 Connecting mechanism 17 Anti-vibration rubber 18 Handle unit 19 Support frame 19A First support frame 19B Second support frame 20 Accelerator lever 21 Drive transmission unit 21A Clutch housing 21B Drive rotating shaft 22 Opening 23 Bearing 24 Opening 26 First shaft coupling unit 26A Anti-rotation groove 26B Fixing bolt 27 Vibration rotating shaft 27A Shaft center 28 Second shaft coupling unit 29 Connecting member 31 Bearing 32 Bearing 33 Bearing 34 Vibration plate 35 Storage space 35A First space 35B Second space 35C Corner portion 35D Corner portion 36 Plug portion 36A Body portion 36B Fitting portion 36C Tip surface 39 Bearing housing portion 39A Locking member 41 Base portion 41A Positioning surface 41B Outer circumferential surface 42 Blade portion 43 Mounting portion 44 Mounting plate portion 45 Fastening metal fitting

Claims

1. A vibration compaction device comprising: a vibrating unit; a housing unit that houses the vibrating unit inside; a compaction unit attached to the tip side of the housing unit; and a plug unit that is disposed inside the compaction unit and fixed to the tip end of the housing unit, wherein the compaction unit comprises a base unit into which the housing unit is inserted and an attachment unit that is joined to the base unit, and the base unit has an integral blade unit that protrudes outward from its outer circumferential surface.

2. The vibration compaction device described in claim 1, characterized in that the compaction section comprises a first space that positions the plug section inside the base and a second space that is formed continuous with the first space, the first space and the second space are formed on the same axis, and the vertical distance from the outer peripheral surface of the base to the corner of the second space is longer than the vertical distance from the outer peripheral surface of the base to the corner of the first space.

3. A vibration compaction device according to claim 2, characterized in that the corners of the second space are curved.

4. A vibration compaction device as described in claim 2, characterized in that the corner portion of the first space is located in the formation area of ​​the blade portion in the horizontal direction of the compaction portion.

5. A vibration compaction device as described in claim 1 or claim 2, characterized in that the vibration section is a vibration plate fixed to a vibration rotation shaft arranged in the housing section, the vibration plate is arranged in sections in the extension direction of the vibration rotation shaft, and the overlap area between the vibration plate and the blade section in the extension direction is 25% or less of the arrangement area of ​​the vibration plate.

6. A vibration compaction device as described in claim 1 or claim 2, characterized in that the mounting portion is formed with a mounting plate portion that attaches and detaches the compaction portion to the housing portion, and when the compaction portion is mounted, the mounting plate portion is arranged in the same direction as the blade portion relative to the compaction portion.

Images