Hand tie tamper

Abstract

To provide a hand tie tamper capable of efficiently performing the work of thrusting ballast (crushed stone).SOLUTION: A vibration-generating part 10 and a handle part 11 to be gripped by a worker are provided, a main beater 13 is fixed to one lateral side surface of a vibrating body 10b by a main beater fixing bracket 12, and a sub-beater 15 is detachably fixed to the other lateral side surface of the vibrating body 10b via a sub-beater fixing bracket 14, the sub-beater fixing bracket 14 has a beater mounting state changing bracket 14b for setting and fixing the sub-beater 15 in a working state or setting the sub-beater 15 in a flip-up state so as not to be used for work, and a beater fixing bracket body 14a for fixing the beater mounting state changing bracket 14b to the other lateral side face of the vibrating body 10b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hand tamper that is gripped by an operator to tamp down ballast (crushed stone) on a railway track bed. [Background technology]

[0002] On ballasted tracks, the ballast (crushed stone) that makes up the ballast track bed can collapse or shift as trains pass by daily, causing the track to sink and the sleepers to float off the ballast track bed, a phenomenon known as "floating sleepers." If trains continue to operate in this condition, the ballast track bed will deteriorate further, so repair work is generally carried out to compact the ballast (crushed stone) on the track bed using a tool called a tie tamper. The device used to carry out this type of repair work is called a tie tamper, and there are large multiple tie tampers that travel on the rails and compact the crushed stone, and small hand tie tampers that workers can hold and work with.

[0003] A hand tamper consists of a vibration generating unit that is vibrated by an engine or motor, a beater that is attached to the vibration generating unit and vibrates, and an operating handle unit that is attached to the top of the vibration generating unit. The worker grasps the operating handle and enters the beater into the ballast while vibrating it with the vibration of the beater, compacting the ballast (crushed stone). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-74691 A [Patent Document 2] JP 2023-74690 A [Patent Document 3] Utility Model Registration No. 3225954 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the hand tamper devices in the above-mentioned Patent Documents 1 to 3 are equipped with only one beater, and therefore may not be able to efficiently tamp down the ballast (crushed stone), for example, when the roadbed is still loose immediately after new ballast (crushed stone) has been spread.

[0006] In other words, when the roadbed is still loose immediately after new ballast (crushed stone) has been spread, a type of tamping work called "soft tamping" is carried out on the ballast (crushed stone) rather than the main tamping work, commonly known as "soft tamping", before the main tamping work of compacting the ballast (crushed stone) with a single beater is carried out. However, in cases such as "soft tamping", it is inefficient to use a hand tamper with a single beater, so it is more efficient to use multiple beaters to tamper the new ballast (crushed stone).

[0007] The present invention has been made in light of these points, and has an object to provide a hand tamper that can efficiently perform the task of compacting ballast (crushed stone). [Means for solving the problem]

[0008] In order to solve the above problems, the hand tamper of the present invention comprises a vibration generating unit that generates vibrations using an engine or motor, and a handle unit that is grasped by an operator, and is characterized in that a main beater is fixed to the vibration generating unit via a main beater fixing bracket, while a sub beater is removably fixed via a sub beater fixing bracket. In addition, the hand tamper of the present invention is also characterized in that the sub-beater fixing bracket has a beater attachment state changing bracket that has a working state set fixing portion that sets and fixes the sub-beater in a working state, and a lifted state set portion that sets the sub-beater in a lifted state with its tip lifted up so that it is not used for work. Furthermore, in the hand tie tamper according to the present invention, the sub beater has at least two or more beater side pin holes that are parallel to the surface of the beater and extend laterally at a predetermined interval in the vertical direction, while the beater attachment state changing bracket has a pair of opposing beater attachment plate portions, each of which has an attachment plate side upper pin hole and an attachment plate side lower pin hole that are provided at upper and lower positions with the same interval as the predetermined interval between the beater side pin holes, and a mounting plate side upper pin hole at a position diagonally above the mounting plate side upper pin hole. The sub beater is set to a working state by passing a sub beater set pin through the upper pin hole on the mounting plate side, the lower pin hole on the mounting plate side and the beater side pin hole of the sub beater as the working state set fixing part, while the sub beater is set to a jumped-up state by passing a sub beater set pin through the upper pin hole on the mounting plate side, the diagonal upper pin hole on the mounting plate side and the beater side pin hole of the sub beater as the jumped-up state set part. In addition, in the hand tie tamper of the present invention, a bolt through hole for passing a sub-beater fixing bolt is provided between the multiple beater side pin holes of the sub beater, while a bolt fixing portion with a female thread portion that screws into the male thread portion of the sub-beater fixing bolt is provided between the upper pin hole on the mounting plate side and the lower pin hole on the mounting plate side of the beater mounting state changing bracket, and the sub beater is fixed to the beater mounting state changing bracket by aligning the multiple beater side pin holes with the upper pin hole on the mounting plate side and the lower pin hole on the mounting plate side to pass the sub beater set pin through, and aligning the sub beater with the female thread portion of the bolt through hole in the beater mounting state changing bracket and passing the sub beater fixing bolt through, screwing its male thread portion into the female thread portion. In the hand tie tamper according to the present invention, the sub-beater fixing bracket further has a beater fixing bracket main body that detachably fixes the beater attachment state changing bracket to the vibration generating section. Effect of the Invention

[0009] The hand tamper of the present invention makes it possible to compact ballast (crushed stone) using two beaters, a main and a sub beater, or to compact ballast (crushed stone) using only the main beater, thereby enabling efficient compaction of ballast. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a front view showing a hand tie tamper according to an embodiment of the present invention with a sub-beater attached. [Diagram 2] FIG. 1 is a front view showing a hand tie tamper according to an embodiment of the present invention with a sub-beater removed. [Diagram 3] FIG. 2 is a left side view showing the hand tie tamper of the embodiment according to the present invention with a sub-beater attached. [Figure 4] FIG. 1 is a plan view showing a hand tie tamper according to an embodiment of the present invention with a sub-beater attached. [Diagram 5] 1A to 1C are a front view, a side view, and a plan view, respectively, of a main beater that constitutes a hand tie tamper according to an embodiment of the present invention. [Figure 6] 2A to 2D are a front view, a left side view, a cross-sectional view along line AA, and a bottom view, respectively, of a beater attachment state changing bracket of a sub-beater fixing bracket that constitutes a hand tie tamper according to an embodiment of the present invention. [Figure 7] 3A to 3C are a left side view, a front view, and a plan view, respectively, of a sub-beater that constitutes a hand tie tamper according to an embodiment of the present invention. [Figure 8] FIG. 2 is a front view of a sub-beater set pin that constitutes the hand tie tamper of the embodiment according to the present invention. [Figure 9] 1A and 1B are a front view and a left side view, respectively, of a beater fixing bolt that constitutes a hand tie tamper according to an embodiment of the present invention. [Figure 10]FIG. 1 is a front view showing a state in which the sub-beater has been removed from the beater attachment state changing bracket in the hand tie tamper according to the embodiment of the present invention and ballast (crushed stone) is being compacted using only the main beater. [Figure 11] FIG. 1 is a front view showing a state in which the sub-beater is set in a raised state (standby state) and ballast (crushed stone) is being compacted using only the main beater in the beater attachment state changing bracket of the hand tie tamper according to an embodiment of the present invention. [Figure 12] FIG. 1 is a front view showing a state in which the sub-beater is set to a usable state and fixed in place in the beater attachment state changing bracket of a hand tie tamper according to an embodiment of the present invention, and ballast (crushed stone) is being compacted using both the main beater and the sub-beater. [Figure 13] FIG. 1 is a front view showing the state in which the main beater and the beater mounting state changing bracket have been removed from the main beater fixing bracket and the sub beater fixing bracket of a hand tie tamper according to an embodiment of the present invention, and a double beater has been attached to each, resulting in a set of four beaters. [Figure 14] FIG. 1 is a side view showing the state in which the main beater and the beater mounting state changing bracket have been removed from the main beater fixing bracket and the sub beater fixing bracket of the hand tie tamper according to the embodiment of the present invention, and a double beater has been attached to each, resulting in a set of four beaters. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a hand tamper 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the hand tamper 1 according to the embodiment described below is merely one example of the present invention, and the present invention is not limited to the following embodiment, and can be modified as appropriate within the scope of the technical concept of the present invention.

[0012] <Configuration of the hand tamper 1 according to the embodiment> As shown in Figures 1 to 7, the hand tamper 1 of the embodiment is configured to include a vibration generating unit 10, a handle unit 11, a main beater fixing bracket 12, a main beater (hereinafter referred to as the main beater) 13, a sub beater fixing bracket 14, a sub beater (hereinafter referred to as the sub beater) 15, a short bolt 16a and nut 16b for fixing the bracket, a long bolt 17a and nut 17 for fixing the bracket, a sub beater set pin 18, a sub beater fixing bolt 19, etc.

[0013] (Vibration generating unit 10) The vibration generating unit 10 vibrates the main beater 13 and sub beater 15 etc. using an engine 10a driven by gasoline or the like to generate vibrations, and a vibrating body 10b which is vibrated by the engine 10a. The main beater 13 is fixed to one side of the vibrating body 10b via a main beater fixing bracket 12, while the other side of the vibrating body 10b facing the main beater 13 is configured to fix the sub beater 15 in a working state or set it in a lifted state via a sub beater fixing bracket 14 having a beater mounting state changing bracket 14b.

[0014] Therefore, short bolt penetration portions 10b1 through which short bracket fixing bolts 16a pass are provided on both the left and right sides of the upper part of the vibrating body 10b, while a long bolt penetration portion 10b2 through which long bracket fixing bolts 17a pass is provided on the lower part of the vibrating body 10b. The main beater 13 is fixed via the main beater fixing bracket 12 by the short bracket fixing bolts 16a and nuts 16b and the long bracket fixing bolts 17a and nuts 17, etc., while the sub beater 15 is fixed in the usage state via the sub beater fixing bracket 14.

[0015] (Handle part 11) The handle portion 11 is a portion that is grasped by an operator, and is provided so as to protrude above the engine 10a with respect to the vibration generating portion 10 via a vibration absorbing portion 11a such as rubber or a spring.

[0016] Since vibrations occur between the handle portion 11 and the vibrating body 10b, a vibration absorbing portion 11a such as rubber or a spring is provided to minimize the transmission of vibrations to the handle portion 11.

[0017] (Main beater fixing bracket 12) The main beater fixing bracket 12 is a bracket that fixes the main beater 13 by pressing it against one of the lateral surfaces of the vibrating body 10b, and has a back plate portion that clamps and fixes the beater side fixing plate portion 13a of the main beater 13 between itself and one of the lateral surfaces of the vibrating body 10b, and a pair of side plate portions that extend at 90 degrees from both sides of the back plate portion.

[0018] The back plate portion of the main beater fixing bracket 12 is provided with bolt through holes, through which a short bolt 16a for bracket fixing and a long bolt 17a for bracket fixing pass, respectively, at the intervals between an upper mounting hole 13a1 and a lower mounting hole 13a2 of the main beater 13 described later.

[0019] Incidentally, the main beater fixing bracket 12 is the same as a beater fixing bracket body 14a of the sub beater fixing bracket 14, as will be described later.

[0020] (Main Beat 13) The main beater 13 is a beater that is directly fixed to the main beater fixing bracket 12 of the vibration generating unit 10 by bolts, nuts, etc., and is composed of a beater side fixing plate portion 13a that is fixed to the main beater fixing bracket 12 as shown in Figures 5(a) to (c), an inclined plate portion 13b that extends diagonally from the lower end of the beater side fixing portion 13a, and a compacting plate portion 13c that extends parallel to the beater side fixing plate portion 13a from the lower end of the inclined plate portion 13b and is inserted between the ballast (crushed stone) to compact the ballast (crushed stone).

[0021] The beater side fixing plate portion 13a is provided with an upper mounting hole 13a1 into which an upper bolt 11b4 above the main beater fixing bracket 12 is inserted, and a lower mounting hole 13a2 into which a lower fully-threaded bolt 11b2 passing through a lower fully-threaded bolt through hole 11b11 in a lower fully-threaded bolt through portion 11b1 below the main beater fixing bracket 12 is inserted, and is fixed to the main beater fixing bracket 12 by the lower fully-threaded bolt 11b2, nut 11c2, and upper bolt 11b4, etc.

[0022] (Subbeater fixing bracket 14) The sub-beater fixing bracket 14 is composed of a beater fixing bracket main body 14a which has a back plate portion and a pair of side plate portions, similar to the main beater fixing bracket 12, and a beater mounting state changing bracket 14b which sets the sub-beater 15 in an operating state and a raised state.

[0023] The beater fixing bracket body 14a, like the main beater fixing bracket 12, is composed of a back plate portion that clamps and fixes the sub-beater 15 between the other opposing lateral side surface of the vibrating body 10b, and a pair of side plate portions extending and bending at 90 degrees from both sides of the back plate portion, and the back plate portion is provided with bolt through holes through which the short bracket fixing bolt 16a and the long bracket fixing bolt 17a pass, respectively.

[0024] The beater mounting state changing bracket 14b is a bracket that is detachably fixed to the other lateral side of the vibrating body 10b by the sub-beater fixing bracket 14 and sets the sub-beater 15 in a working state and a lifted-up state. As shown in Figures 6(a) to (c), the bracket has a back plate portion 14b1 that is sandwiched and fixed between the other lateral side of the vibrating body 10b and the sub-beater fixing bracket 14, a pair of beater mounting plate portions 14b2, 14b2 that extend at a 90-degree angle from both sides of the back plate portion 14b1, a top plate portion 14b3 that is joined by welding or the like to the upper end portion of the back plate portion 14b1 and the upper ends of the pair of beater mounting plate portions 14b2, 14b2, and a bolt fixing portion 14b4.

[0025] The back plate portion 14b1, like the beater side fixing plate portion 13a of the main beater 13, is provided with an upper mounting hole 14b11 into which a short bracket fixing bolt 16a is inserted, and a lower mounting hole 14b12 into which a long bracket fixing bolt 17a is inserted below the sub-beater fixing bracket 14, and is fixed by the short bracket fixing bolt 16a, the long bracket fixing bolt 17a, nuts 17b, etc.

[0026] Each of the pair of beater mounting plate portions 14b2, 14b2 has an upper pin hole 14b21 and a lower pin hole 14b22 on the mounting plate side that are arranged vertically at a predetermined distance from each other the same as the predetermined distance between the beater side pin holes, and a diagonally upper pin hole 14b23 on the mounting plate side that is arranged diagonally above the upper pin hole 14b21 on the mounting plate side.

[0027] The bolt fixing portion 14b4 is provided between the upper pin hole 14b21 on the mounting plate side and the vertically lower pin hole 14b2 on the mounting plate side in the back plate portion 14b1 between a pair of beater mounting plate portions 14b2, 14b2, and is provided with a female thread portion 14b41 into which the beater fixing bolt screws, and reinforcing plates 14b42, 14b42 are joined to both sides of the female thread portion 14b4 and provided on the back plate portion 14b1.

[0028] (Subbeata 15) The sub-beater 15, like the main beater 13, is composed of a beater side fixed plate portion 15a, an inclined plate portion 15b extending diagonally from the lower end of the beater side fixed plate portion 15a, and a compacting plate portion 15c extending parallel to the beater side fixed plate portion 15a from the lower end of the inclined plate portion 15b and inserted between the ballast (crushed stone) to compact the ballast (crushed stone).

[0029] Unlike the main beater 13, the beater side fixing plate portion 15a of the sub-beater 15 has a beater side first mounting portion 15a1 and a beater side second mounting portion 15a2 which extend parallel to the back surface of the beater side fixing plate portion 15a and have a beater side first pin hole 15a11 and a beater side second pin hole 15a21 facing both the left and right sides of the beater side fixing plate portion 15a, and are provided at the same intervals as the mounting plate portion side upper pin hole 14b21 and the mounting plate portion side vertically lower pin hole 14b2.

[0030] Further, the beater side fixing plate portion 15a of the sub-beater 15 is provided with a beater side fixing bolt through hole 15a3, through which a beater fixing bolt passes, between the beater side first mounting portion 15a1 and the beater side second mounting portion 15a2.

[0031] (Short bolt 16a and nut 16b for bracket fixing) The short bolts 16a for fixing the bracket are inserted into the short bolt penetration portions 10b1 on both the left and right sides of the upper part of the vibrating body 10b, and fix the upper part of the main beater 13 via the main beater fixing bracket 12 with nuts 16b, while also fixing the upper parts of the sub-beater fixing bracket 14, which is the beater fixing bracket main body 14a and the beater mounting state changing bracket 14b.

[0032] (Long bolt 17a and nut 17b for bracket fixing) The long bolt 17a for fixing the bracket is inserted into the long bolt penetration portion 10b2 at the bottom of the vibrating body 10b, and fixes the bottom of the main beater 13 via the main beater fixing bracket 12 with a nut 17b, while also fixing the bottom of the sub-beater fixing bracket 14, which is the beater fixing bracket main body 14a and the beater mounting state changing bracket 14b.

[0033] (Subbeater set pin 18) As will be described later, the sub-beater set pin 18 is inserted into the beater side first pin hole 15a11 and beater side second pin hole 15a21 of the sub-beater 15, and into the mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 or the mounting plate side diagonally upper pin hole 14b23 of the pair of beater mounting plate portions 14b2, 14b2 of the beater mounting state change bracket 14b, and is a pin for setting the sub-beater 15 in an in-use state or a flipped-up state (standby state) on the beater mounting state change bracket 14b. As shown in FIG. 8, the tip of the sub-beater set pin 18 is provided with anti-fall-out preventing springs 18a, 18a which are biased outward by a spring (not shown) or the like, and a ring 18b is provided at the rear end.

[0034] (Subbeater fixing bolt 19) The sub-beater fixing bolt 19 is a bolt for fixing the sub-beater 15 to the beater mounting state changing bracket 14b in an in-use state, and as shown in Figures 9(a) and (b), a rod-shaped handle portion 19c is joined by welding or the like to a head 19b of a shaft portion 19a having a male thread portion 19a1. Thus, the bolt is formed into an overall T-shape.

[0035] <Operation of the hand tamper 1 according to the embodiment> Next, the operation of the hand tamper 1 according to the embodiment configured as above will be described.

[0036] (In the case of "main tamping" work, the sub beater 15 is removed and the ballast (crushed stone) B is tamped only by the main beater 13.)

[0037] In this case, as shown in Fig. 10, the sub-beater 15 is removed from the beater mounting state changing bracket 14b fixed to the lateral side opposite the vibrating body 10b via the beater fixing bracket body 14a, and the tamping work of the ballast (crushed stone) B is performed only by the main beater 13. In the figure, M is a sleeper and R is a rail.

[0038] In other words, the worker turns on the drive switch of the engine 10a in the vibration generating unit 10 to vibrate the vibrating body 10b, thereby vibrating the beater fixing bracket main body 14a and the beater mounting state changing bracket 14b that constitute the main beater fixing bracket 12 and the sub beater fixing bracket 14 fixed to the side surface of the vibrating body 10b. However, since the sub beater 15 is removed from the beater mounting state changing bracket 14b and the main beater 13 is fixed to the main beater fixing bracket 12, only the compacting plate portion 13c at the tip of the main beater 13 is inserted into the gaps in the ballast (crushed stone) B to perform compaction.

[0039] (In the case of "main tamping" work, the sub beater 15 is set in the raised state (standby state) and the ballast (crushed stone) B is tamped only by the main beater 13.)

[0040] In this case, a sub-beater 15 is attached to a beater mounting state changing bracket 14b fixed via a beater fixing bracket main body 14a to the opposite lateral side of the vibrating body 10b, but as shown in Figure 11, the sub-beater 15 is set in a raised state (standby state) and the ballast (crushed stone) B is compacted using only the main beater 13.

[0041] In other words, the sub-beater 15 is aligned with the beater side first pin hole 15a11 (see Figures 7(a) to (c)) and the beater side second pin hole 15a21 (see Figures 7(a) to (c)) provided at a predetermined distance on the back side of the beater side fixing plate portion 15a, respectively, in the pair of beater mounting plate portions 14b2, 14b2 of the beater mounting state changing bracket 14b, and the sub-beater set pins 18 (see Figure 8) are inserted respectively, so that the compacting plate portion 15c of the sub-beater 15 is set in a jumped-up state (standby state) in which it jumps up diagonally upward as shown in Figure 11.

[0042] In this case, since the sub-beater 15 is in the raised state and is not used for tamping the ballast (crushed stone) B, the sub-beater 15 is not fixed to the beater mounting state changing bracket 14b by the sub-beater fixing bolt 19.

[0043] Then, when the worker turns on the drive switch of the engine 10a in the vibration generating unit 10, the sub-beater 15 is attached to the beater mounting state changing bracket 14b of the sub-beater fixing bracket 14, but since it is attached in a raised position, the worker can perform the work of compacting the ballast (crushed stone) B using only the main beater 13, just as if the sub-beater 15 was not attached.

[0044] (In the case of "ramping" work in which both the main beater 13 and the sub beater 15 efficiently ram the ballast (crushed stone) B.)

[0045] In this case, as shown in Figure 12, the sub-beater 15 is set to the beater mounting state changing bracket 14b in the usage state, and the two beaters 13, 15, the main beater 13 and the sub-beater 15, are used to efficiently tamp down the ballast (crushed stone) B. In other words, when using two beaters 13, 15 to efficiently tamp down the (crushed stone) B, twice as many beaters are used, and the "tamp down" work of the ballast (crushed stone) B can be done with half the manpower or half the work time, which significantly improves workability.

[0046] Specifically, the beater side first pin hole 15a11 and beater side second pin hole 15a21 (see Figures 7(a) to (c)) of the beater side first mounting portion 15a1 and beater side second mounting portion 15a2, which are provided at a predetermined distance on the back side of the beater side fixing plate portion 15a of the sub-beater 15, are aligned with the mounting plate side upper pin hole 14b21 and mounting plate side vertically lower pin hole 14b2 (see Figures 6(a) to (c)) of a pair of beater mounting plate portions 14b2, 14b2 of the beater mounting state changing bracket 14b, and the sub-beater set pins 18, 18 are inserted respectively to set the sub-beater 15 in its usage state so that the compacting plate portion 15c faces vertically downward as shown in Figure 12.

[0047] Next, the sub-beater fixing bolt 19 is passed through the beater side fixing bolt through hole 15a3 (see Figures 7(a) to (c)) of the beater side fixing plate portion 15a of the sub-beater 15, and the male threaded portion 19a1 of its shaft portion 19a is screwed into the female threaded portion 14b41 of the bolt fixing portion 14b4 (see Figures 6(a) to (c)) to fix the sub-beater 15 in its usage state, i.e., in a vertical position facing the main beater 13.

[0048] In this case, since the sub-beater 15 is attached in an usable state to the beater mounting state changing bracket 14b of the sub-beater fixing bracket 14, when the worker drives the engine 10a with the vibration generating unit 10, the main beater fixing bracket 12 and the sub-beater fixing bracket 14 vibrate, and the two beaters, the main beater 13 and the sub-beater 15, can perform a "pounding" operation to compact the ballast (crushed stone) B.

[0049] <Summary of the hand tamper 1 according to the embodiment of the present invention> As described above, the hand tamper 1 of an embodiment of the present invention comprises a vibration generating unit 10 that generates vibrations using an engine 10a, and a handle unit 11 that is grasped by an operator. A main beater 13 is fixed to one lateral side of the vibrating body 10b by a main beater fixing bracket 12, while a sub-beater 15 is detachably fixed to the other lateral side of the vibrating body 10b by a sub-beater fixing bracket 14 so as to face the main beater 13.

[0050] Therefore, in the hand tie tamper 1 of the embodiment, when the trackbed is still loose, for example, immediately after new ballast (crushed stone) has been spread, the two main and sub beaters 13, 15 perform a "casual pounding" operation to pound the ballast (crushed stone) B, whereas when performing a "full pounding" operation to compact the ballast (crushed stone) B under the sleepers M, the sub beater 15 is not attached and only the main beater 13 can be used to pound the ballast (crushed stone) B, so that the operation of compacting the ballast (crushed stone) B can be performed efficiently. In particular, when the sub beater 15 is attached and the two main and sub beaters 13, 15 perform a "casual pounding" operation to pound the ballast (crushed stone) B, the number of beaters used is doubled, and the "casual pounding" operation of the ballast (crushed stone) B can be performed in half the manpower or in half the work time, so that the workability can be significantly improved.

[0051] In addition, in the hand tamper 1 of the embodiment of the present invention, the sub-beater fixing bracket 14 has a beater attachment state changing bracket 14b that fixes the sub-beater 15 in a working state and sets the sub-beater 15 to a lifted state so that it is not used for work.

[0052] Therefore, with the hand tie tamper 1 of the embodiment according to the present invention, the sub-beater 15 can be set to the raised state by the beater attachment state changing bracket 14b of the sub-beater fixing bracket 14 without removing the sub-beater 15, and work can be performed using only the main beater 13. As a result, it becomes possible to quickly switch between a "soft beat" operation of hitting ballast (crushed stone) B with the two beaters, the main and sub, and a "full beat" operation of tamping the ballast (crushed stone) B below the sleepers M, improving usability and improving work efficiency.

[0053] Moreover, in the hand tie tamper 1 according to the embodiment of the present invention, the sub-beater 15 has at least two or more beater-side pin holes that are parallel to the surface of the beater at a predetermined interval in the vertical direction and extend in the horizontal direction, while the beater attachment state changing bracket 14b has a pair of opposing beater attachment plate portions 14b2, 14b2, and the pair of beater attachment plate portions 14b2, 14b2 respectively have attachment plate portion side upper pin hole 14b21, attachment plate portion side lower pin hole 14b22, and attachment plate portion side upper pin hole 14b23 that are provided at a predetermined interval in the vertical direction the same as the interval between the beater-side pin holes. The mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 are provided at a position diagonally above the mounting plate side lower pin hole 14b22, and the sub-beater 15 is fixed in a working state using the mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 as a working state set fixing part, while the mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 and the mounting plate side diagonal upper pin hole 14b23 are used to fix the sub-beater 15 in a jumped-up state out of the mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 as a jumped-up state set part.

[0054] Therefore, according to the hand tamper 1 of the embodiment, even if the sub-beater 15 is not removed, the beater attachment state changing bracket 14b can be used to easily set the sub-beater 15 in a lifted state using the sub-beater set pin 18 so that it is not used for work, and work can be performed using only the main beater 13, which improves usability and therefore improves work efficiency.

[0055] In the hand tie tamper 1 according to the embodiment of the present invention, a beater-side fixing bolt through hole 15a3 through which the sub-beater fixing bolt 19 passes is provided between the beater-side first mounting portion 15a1 and the beater-side second mounting portion 15a2 in the beater-side fixing plate portion 15a of the sub-beater 15, while a bolt fixing portion 14b4 having a female screw portion 14b41 that screws into the male screw portion 19a1 of the shaft portion 19a of the sub-beater fixing bolt 19 is provided between the mounting plate portion side upper pin hole 14b21 and the mounting plate portion side lower pin hole 14b22 in the beater mounting state changing bracket 14b. The beater 15 is fixed to the beater mounting state changing bracket 14b by aligning the beater side first mounting portion 15a1, the beater side second mounting portion 15a2 with the mounting plate side upper pin hole 14b21 and the mounting plate side lower pin hole 14b22 of the beater mounting state changing bracket 14b and passing the sub-beater set pin 18 through them, and aligning the beater side fixing bolt through hole 15a3 with the female threaded portion 14b41 of the bolt fixing portion 14b4 of the beater mounting state changing bracket 14b and passing the sub-beater fixing bolt 19 through and screwing the male threaded portion 19a1 into the female threaded portion 14b41.

[0056] Therefore, according to the hand tamper 1 of the embodiment of the present invention, even if the sub-beater 15 is not removed, the beater attachment state changing bracket 14b, sub-beater set pin 18, sub-beater fixing bolt 19, etc. can be used to easily set the sub-beater 15 to a lifted state so that it is not used for work, and can also be easily fixed in a usable state, thereby improving usability and improving work efficiency.

[0057] In the hand tamper 1 according to the embodiment of the present invention, the beater attachment state changing bracket 14b is detachably attached to the other lateral surface of the vibrating body 10b by a beater fixing bracket main body 14a having the same shape as the main beater fixing bracket 12.

[0058] Therefore, not only can the beater attachment state-changing bracket 14b be fixed to the other side surface of the vibrating body 10b to fix the sub-beater 15 in the usage state or set to a flipped-up state (standby state), but it is also possible to remove the beater attachment state-changing bracket 14b and fix the sub-beater 15 to the other side surface of the vibrating body 10b by the beater fixing bracket main body 14a to work with two beaters, or to remove both the beater attachment state-changing bracket 14b and the beater fixing bracket main body 14a to work with only one beater, the main beater 13.This also improves usability and improves work efficiency.

[0059] In the explanation of the operation of the hand tie tamper 1 in the above embodiment, when the trackbed is still loose immediately after new ballast (crushed stone) has been spread, a "soft beat" operation is performed in which the ballast (crushed stone) B is hammered using two beaters, the main beater 13 and the sub beater 15, and when a "full beat" operation is performed to compact the ballast (crushed stone) B under the sleepers M, the ballast (crushed stone) B is compacted using only the main beater 13. However, the present invention is not limited to such operation (use), and it is of course possible to use two beaters, the main beater 13 and the sub beater 15, to compact the ballast (crushed stone) B, or to use only the main beater 13 to compact the ballast (crushed stone) B, as appropriate, depending on the situation or condition at the site.

[0060] Furthermore, in the description of the hand tamper 1 of the above embodiment, the main beater 13 is fixed to one lateral side of the vibrating body 10b by the main beater fixing bracket 12, while the sub-beater 15 is detachably fixed to the other lateral side of the vibrating body 10b by the sub-beater fixing bracket 14 so as to face the main beater 13. However, the present invention is not limited to this, and a beater attachment state changing bracket 14b may also be fixed to one lateral side of the vibrating body 10b by the main beater fixing bracket 12, so that the main beater 13 can be fixed to the usage state or set to a flipped-up state (standby state) via the beater attachment state changing bracket 14b. Alternatively, the sub-beater 15 may be detachably fixed to the other lateral side of the vibrating body 10b by a beater fixing bracket main body 14a having the same shape as the main beater fixing bracket 12, without attaching the beater attachment state changing bracket 14b.

[0061] In addition, in the description of the above embodiment of the hand tamper 1, the main beater 13 is fixed to the left and right side surfaces of the vibrating body 10b by the main beater fixing bracket 12 and the sub beater fixing bracket 14, respectively, and the sub beater 15 is fixed in the usage state or set in the raised state (standby state). However, as shown in Figures 13 and 14, it is of course also possible to configure the double beater units 20, 20, each of which has two beaters 20b, 20b fixed to each of double beater bases 20a, 20a assembled from steel by bolts or the like, to be fixed to the left and right side surfaces of the vibrating body 10b by the main beater fixing bracket 12 and the beater fixing bracket body 14a of the sub beater fixing bracket 14, which has the same configuration as the main beater fixing bracket 12, respectively, so that the four beaters 20b can be vibrated simultaneously by driving a single engine 10a to perform the compaction work of ballast (crushed stone) B.

[0062] Furthermore, in the description of the hand tie tamper 1 of the above embodiment, it was described that the beater mounting plate portion 14b2, 14b2 of the beater mounting state changing bracket 14b of the sub-beater fixing bracket 14 is provided with the mounting plate portion side upper pin hole 14b21, the mounting plate portion side lower pin hole 14b22 and the mounting plate portion side oblique upper pin hole 14b23, and that the sub-beater 15 is provided with the beater side first pin hole 15a11 and the beater side second pin hole 15a21 and the sub-beater 15 is set to the use state or the flipped-up state by passing the sub-beater set pin 18 through these pin holes, but the present invention is not limited to this, and it is of course also possible to configure the sub-beater 15 to be rotatable about the sub-beater fixing bolt 19 passed through the beater side fixing bolt through hole 15a3, which is the center of the beater side fixing plate portion 15a of the sub-beater 15, and to set the sub-beater 15 to the use state or the flipped-up state by rotation about the sub-beater fixing bolt 19.

[0063] In addition, in the description of the hand tamper 1 of the above embodiment, the vibration generating unit 10 has been described as vibrating the vibrating body 10b using the engine 10a, setting the vibrating body 10b to a usable state using the main beater 13 and sub beater fixing bracket 14 fixed to the side of the vibrating body 10b using the main beater fixing bracket 12, and performing the compaction work of ballast (crushed stone) B using the sub beater 15 fixed using a sub beater fixing bolt 19 or the like, however, the present invention is not limited to this, and it is of course also possible to vibrate the vibrating body 10b using a motor to vibrate the main beater 13 and sub beater 15, and the motor may of course be of either a cord type that connects to an outlet or a rechargeable battery type. [Explanation of symbols]

[0064] 1 Hand Tie Tamper 10 Vibration generating unit 10a Engine 10b Vibrating body 10b1 Short bolt penetration 10b2 Long bolt penetration 11 Handle 11a Vibration absorbing part 12 Main beater fixing bracket 12a Back plate part 12b Side plate part 13 Main Beata 13a Beater side fixing part 13a1 Upper mounting hole 13a2 Lower mounting hole 13b Inclined plate part 13c Tamping plate section 14 Subbeater fixing bracket 14a Beater fixing bracket body 14a1 Back plate part 14a2 Side plate part 14b Beater mounting state change bracket 14b1 Back plate part 14b11 Upper mounting hole 14b12 Lower mounting hole 14b2 Beater mounting plate 14b21 Upper pin hole on mounting plate side (fixed part for working state set, lifted state set part) 14b22 Lower pin hole on mounting plate side (working state set fixing part) 14b23 Pin hole at diagonal top on mounting plate side (flip-up state set part) 14b3 Top plate 14b4 Bolt fixing part (working state set fixing part) 14b41 Female thread 14b42 Reinforcement plate 15 Subbeat 15a Beater side fixing plate 15a1 Beater side first attachment part 15a11 Beater side first pin hole 15a2 Beater side second mounting part 15a21 Beater side 2nd pin hole 15a3 Beater side fixing bolt through hole 15b Inclined plate part 15c Tamping plate section 16a Short bolt for fixing bracket 16b Nut 17a Long bolt for fixing bracket 17b Nut 18 Subbeater set pin 18a Anti-slip biasing protrusion 18b Ring 19 Subbeater fixing bolt 19a1 Male thread 19b Head 19c Handle 20 Double Beater Unit 20a double beater base 20b Vita B Ballast (crushed stone) M Sleeper R rail

Claims

1. A hand tamper comprising a vibration generating unit that generates vibrations using an engine or motor, and a handle portion that is grasped by an operator, wherein a main beater is fixed to the vibration generating unit via a main beater fixing bracket, while a sub beater is removably fixed to the vibration generating unit via a sub beater fixing bracket.

2. The hand tie tamper according to claim 1, The sub-beater fixing bracket is This hand tamper is characterized by having a beater attachment state changing bracket that has a working state set fixing part that sets and fixes the sub beater in a working state, and a lifted state set part that sets the sub beater in a lifted state with its tip lifted up so that it is not used for work.

3. The hand tie tamper according to claim 2, The sub beater has at least two or more beater side pin holes that are parallel to the surface of the beater at a predetermined interval in the vertical direction and extend in the horizontal direction, The beater mounting state changing bracket has a pair of opposing beater mounting plate portions, The pair of beater mounting plates each have a mounting plate upper pin hole and a mounting plate lower pin hole that are spaced apart at upper and lower positions by the same distance as the predetermined distance between the beater pin holes, and a mounting plate diagonally upper pin hole that is located diagonally above the mounting plate upper pin hole, A hand tamper characterized in that the working state set fixing part sets the sub beater in a working state by passing a sub beater set pin through the upper pin hole on the mounting plate side, the lower pin hole on the mounting plate side and the beater side pin hole of the sub beater, while the jumped-up state set part sets the sub beater in a jumped-up state by passing a sub beater set pin through the upper pin hole on the mounting plate side, the diagonally upper pin hole on the mounting plate side and the beater side pin hole of the sub beater.

4. The hand tie tamper according to claim 3, A bolt through hole for passing a sub-beater fixing bolt is provided between the plurality of beater side pin holes of the sub-beater, a bolt fixing portion having a female thread portion that screws into a male thread portion of the sub-beater fixing bolt is provided between the mounting plate portion side upper pin hole and the mounting plate portion side lower pin hole in the beater mounting state changing bracket, A hand tie tamper characterized in that the sub beater is fixed to the beater mounting state changing bracket by aligning the multiple beater side pin holes with the upper pin hole on the mounting plate side and the lower pin hole on the mounting plate side and passing the sub beater set pin through them, and aligning them with the female threaded portion of the bolt through hole in the beater mounting state changing bracket, passing the sub beater fixing bolt through and screwing the male threaded portion into the female threaded portion.

5. The hand tie tamper according to any one of claims 2 to 4, The sub-beater fixing bracket further includes: a beater fixing bracket main body that detachably fixes the beater attachment state changing bracket to the vibration generating portion.

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