Tamping tool

Abstract

An example of a tamping tool capable of performing proper tamping work is disclosed. [Solution] The tool body 2 is tapered so that the cross-sectional area in the vertical direction decreases from the upper end to the lower end, and at least one side of the tool body 2 in the vertical direction is made of an inclined surface 2A that is tilted with respect to the vertical direction, and it is desirable that the horizontal dimension of the inclined surface 2A is substantially constant in the vertical direction. As a result, when the tamping tool 1 is pressed downward, the tamping tool 1 can apply a "diagonally downward pressing force directed toward the underside of the sleeper" to the ballast. Therefore, if tamping work is performed using the tamping tool 1, it may be possible to perform proper tamping work.

Description

Technical Field

[0001] The present disclosure relates to a tamping tool used during tamping operations for compacting the ballast laid under the sleepers.

Background Art

[0002] For example, the tamping tool described in Patent Document 1 is configured in a pickaxe (tsurubashi) shape. This is because during the tamping operation, the tamping tool is stabbed into the ballast spread on the roadbed to perform the operation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] If the tamping operation is performed inappropriately, the repeated load acting on the rail as the train runs causes the rail to sink or become uneven. As a result of various tests and trials regarding the proper performance of the tamping operation, the inventor has discovered the following points.

[0005] That is, the inventors have discovered that in the tamping operation, it is important to "press the ballast obliquely downward at least toward the lower side of the sleeper". The present disclosure discloses an example of a tamping tool in view of this point.

Means for Solving the Problems

[0006] The tamping tool used during the tamping operation for compacting the ballast laid under the sleepers preferably includes at least one of the following constituent elements. In other words, the constituent element is a tool body (2) that is tapered such that the cross-sectional area in the direction perpendicular to the vertical direction (hereinafter referred to as the vertical width direction) decreases as you move from the upper end to the lower end in the vertical direction during tamping.

[0007] Furthermore, of the tool body (2), at least one side in the vertical direction is composed of an inclined surface (2A) that is tilted with respect to the vertical direction, and it is desirable that the dimensions of the inclined surface (2A) in the vertical direction and the horizontal direction perpendicular to the vertical direction be approximately constant in the vertical direction.

[0008] As a result, when the tamping tool is pressed downwards, it can apply a downward, oblique pressure to the ballast, directed towards the underside of the sleeper. Therefore, using this tamping tool to perform tamping work can enable proper tamping.

[0009] Incidentally, the symbols in each of the parentheses above are just examples showing the correspondence with the specific configurations etc. described in the embodiments described later, and this disclosure is not limited to the specific configurations etc. indicated by the symbols in the parentheses above. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows a tamping tool according to the first embodiment. [Figure 2] This figure shows an example of construction using the tamping tool according to the first embodiment. [Figure 3] This figure shows a tamping tool according to the first embodiment. [Figure 4] This figure shows a tamping tool according to the first embodiment. [Figure 5] This is an explanatory diagram of a construction example using the tamping tool according to the first embodiment. [Figure 6] This is a diagram illustrating the features of the tamping tool according to the first embodiment. [Figure 7] This figure shows a tamping tool according to a second embodiment. [Figure 8] It is an explanatory diagram showing the features of the tamping tool according to the second embodiment. [Figure 9] It is a diagram showing the tamping tool according to the third embodiment. [Figure 10] It is a diagram showing the tamping tool according to the fourth embodiment. [Figure 11] It is a diagram showing the tamping tool according to the fourth embodiment. [Figure 12] It is a diagram showing the tamping tool according to the fifth embodiment. [Figure 13] It is an explanatory diagram showing the features of the tamping tool according to the fifth embodiment. [Figure 14] It is a diagram showing the tamping tool according to the sixth embodiment. [Figure 15] A and B are diagrams showing the tamping tool according to the seventh embodiment. [Figure 16] A to C are diagrams showing the tamping tool according to the eighth embodiment. [Figure 17] It is a diagram showing the tamping tool according to the ninth embodiment. [Figure 18] A to D are diagrams showing the tamping tool according to the ninth embodiment. [Figure 19] It is a diagram showing the tamping tool according to the tenth embodiment.

Embodiments for Carrying Out the Invention

[0011] The following "Embodiments of the Invention" show an example of embodiments belonging to the technical scope of the present disclosure. That is, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0012] Note that the arrows indicating the directions attached to each figure indicate the directions during the operation using the tamping tool according to the present embodiment. Hereinafter, the vertical direction during the tamping operation is simply referred to as the "vertical direction". The direction orthogonal to the vertical direction is referred to as the "longitudinal width direction". The direction orthogonal to the longitudinal width direction and the vertical direction is referred to as the "lateral width direction".

[0013] At least one member or part described with a sign is provided, unless otherwise stated such as "one". And the tamping tool shown in the present disclosure includes at least one component such as a member or part described with a sign, and at least one of the illustrated structural parts.

[0014] (First Embodiment) <1. Overview of Tamping Tool> The tamping tool 1 shown in FIG. 1 is an example of the tamping tool according to the present disclosure. A tamping tool is a tool used when performing tamping work. The tamping work according to the present embodiment refers to the work of compacting the ballast laid under the sleeper.

[0015] As shown in FIG. 1, the tamping tool 1 includes at least a tool body 2 and a connecting tool 3. The tool body 2 is a member that contacts the ballast and applies a pressing force to the ballast when compacting the ballast.

[0016] As shown in FIG. 2, the connecting tool 3 is a member that connects a machine (for example, a multiple tamping machine) 4 that performs tamping work and the tool body 2. Thereby, the pressing force generated by the machine 4 is transmitted to the tool body 2 via the connecting tool 3.

[0017] <2. Details of Tamping Tool> <2.1 Details of Tool Body> As shown in FIG. 1, the tool body 2 according to the present embodiment is configured in a tapered shape such that the cross-sectional area in the vertical width direction decreases from the upper end side to the lower end side. In other words, the vertical width dimension W1 of the tool body 2 becomes smaller from the upper end side to the lower end side.

[0018] Note that the "cross-sectional area in the vertical width direction" refers to the area of the outer edge shape (in this embodiment, a rectangle) depicted by the cut end face when the tool body 2 is cut by a virtual plane orthogonal to the vertical direction. Therefore, whether the tool body 2 is made of a hollow member or a solid member, if the outer edge shapes are congruent, the "cross-sectional area in the vertical direction" is the same. Incidentally, the tool body 2 in this embodiment is made of a solid member.

[0019] Furthermore, at least one side of the tool body 2 in the vertical direction (in this embodiment, the side on one end and the other end in the vertical direction) is composed of inclined surfaces 2A and 2B that are tilted with respect to the vertical direction. These inclined surfaces 2A and 2B are configured to be planar.

[0020] Furthermore, as shown in Figure 3, the widthwise dimension W2 of the inclined surfaces 2A and 2B is approximately constant in the vertical direction. In other words, the tool body 2 according to this embodiment is configured in a so-called "gable" or "triangular prism" shape.

[0021] The angle θ1 between the inclined surface 2A and the vertical direction is 20 degrees or more. Similarly, the angle θ2 between the inclined surface 2B and the vertical direction is 20 degrees or more. In this embodiment, however, θ1 is 45 degrees and θ2 is 45 degrees.

[0022] <2.2 Linking Tools> As shown in Figure 4, a rectangular plate-shaped locking body 3A is provided on the lower end of the connecting tool 3. The tool body 2 is provided with an insertion opening 2C into which the locking body 3A is inserted. The connecting tool 3, and thus the locking body 3A, is prevented from coming out of the insertion opening 2C by fixing pins P1 and P2 attached to the tool body 2.

[0023] In other words, a rod-shaped gripping body 3B, which is gripped by the machine 4, is provided at the upper end of the locking body 3A. The width dimension of the gripping body 3B (the dimension of the part parallel to the width direction) is smaller than the width dimension of the locking body 3A (the dimension of the part parallel to the width direction).

[0024] The fixing pin P1 is located on one side in the lateral direction relative to the gripping body 3B and is locked (hooked) to the locking body 3A. The fixing pin P2 is located on the other end in the lateral direction relative to the gripping body 3B and is locked to the locking body 3A. This prevents the connecting tool 3 from coming out of the insertion opening 2C.

[0025] <3. Method of Use and Features of the Tamping Tool According to This Embodiment> In this embodiment, the tamping operation is performed using a set of four tamping tools 1, as shown in Figure 2.

[0026] Specifically, as shown in Figure 5, the person performing the tamping work (including an automated machine) places the tamping tool 1 on one side and the other side of the sleeper to be tamped, and also places the tamping tool 1 on one side and the other side of the rail.

[0027] Then, the person performing the tamping work (hereinafter referred to as the worker) presses each tamping tool 1 downwards while vibrating it, for example, in the vertical direction, as shown in Figure 6.

[0028] As a result, the tamping tool 1 can apply at least a "downward diagonal pressing force directed towards the underside of the sleeper" to the ballast. Therefore, performing tamping work using the tamping tool 1 may enable proper tamping work. .

[0029] (Second Embodiment) As shown in Figure 7, the tamping tool 1 according to this embodiment has curved inclined surfaces 2A and 2B. Components identical to those in the above-described embodiment are denoted by the same reference numerals. Therefore, redundant explanations are omitted in this embodiment.

[0030] As a result, even with the tamping tool 1 according to this embodiment, at least a "downward diagonal pressing force directed towards the underside of the sleeper" can be applied to the ballast, making it possible to perform proper tamping work.

[0031] Furthermore, in the tamping tool 1 according to this embodiment, as shown in Figures 8A to 8C, the inclined surfaces 2A and 2B are configured in a curved shape. Therefore, the normal direction of the inclined surfaces 2A and 2B changes depending on the contact depth with the ballast, and an increase in the force that pushes the ballast downwards from the sleepers, i.e., the pressing force, can be expected.

[0032] (Third embodiment) The tamping tool 1 according to the above embodiment had a configuration comprising two inclined surfaces 2A and 2B. In contrast, the tamping tool 1 according to this embodiment is a tamping tool having one inclined surface 2A or 2B, as shown in Figure 9.

[0033] In other words, the side of the tool body 2 on the other end in the vertical direction is composed of a plane that is approximately parallel to the vertical direction. Specifically, the tamping tool 1 shown on the left side of the page has only an inclined surface 2B. The tamping tool 1 shown on the right side of the page has only an inclined surface 2A.

[0034] This limits the flow of ballast to the underside of the sleeper to the target sleeper, and to the adjacent sleepers. This can help to suppress the impact on [the subject]. Note that components identical to those in the above-described embodiment are denoted by the same reference numerals. Therefore, redundant explanations are omitted in this embodiment.

[0035] (Fourth Embodiment) The tamping tool 1 according to this embodiment is an example in which at least the inclined surfaces 2A and 2B are provided with a protrusion 2D or a recess 2E. Figure 10 shows an example in which at least the inclined surfaces 2A and 2B are provided with a protrusion 2D. Figure 11 shows an example in which at least the inclined surfaces 2A and 2B are provided with a recess 2E.

[0036] Furthermore, in a tamping tool 1 equipped with a protrusion 2D, the contact area between the ballast and the tool body 2 increases, thus increasing the amount of pressure the ballast receives from the tamping tool 1. This can facilitate the movement of the ballast, potentially enabling proper tamping work.

[0037] In this embodiment, the convex portion 2D is composed of a smooth, spherical shape. However, the shape of the convex portion 2D is not limited to a spherical shape. For example, the convex portion 2D may be composed of a cone shape.

[0038] Furthermore, in the tamping tool 1 provided with the recessed portion 2E, similar to the tamping tool 1 provided with the convex portion 2D, the contact area between the ballast and the tool body 2 is increased, and the weight of the tool body 2 can be reduced.

[0039] (Fifth embodiment) As shown in Figure 12, the tamping tool 1 according to this embodiment has a flange portion 2F provided on the upper end side of the tool body 2. The flange portion 2F is a flange portion that protrudes from the tool body 2 in directions perpendicular to the vertical direction, that is, in the vertical and horizontal directions.

[0040] As a result, in this embodiment, as shown in Figure 13A, the ballast that moves upward is held down by the flange portion 2F, making it possible to reliably move the ballast to the underside of the sleepers. Consequently, it may be possible to perform proper tamping work.

[0041] Incidentally, if flange portion 2F is not provided, as shown in Figure 13B, the ballast, subjected to a downward pressure from vertically above, may move upwards.

[0042] Note that components identical to those in the above-described embodiments are denoted by the same reference numerals. Therefore, redundant explanations are omitted in this embodiment. (Sixth Embodiment) This embodiment and subsequent embodiments are specific examples relating to the connection structure between the tool body 2 and the connecting tool 3.

[0043] In the following description, components identical to those in the above-described embodiment are denoted by the same reference numerals. Therefore, redundant explanations are omitted in this embodiment.

[0044] Furthermore, in the tamping tool 1 according to this embodiment, as shown in Figure 14, a washer block 3C is interposed between the locking body 3A and the fixing pins P1 and P2. The washer block 3C is a block that indirectly increases the contact area between the locking body 3A and the fixing pins P1 and P2. This allows the tool body 2 and the connecting tool 3 to be firmly connected.

[0045] (Seventh Embodiment) In the tamping tool 1 according to this embodiment, as shown in Figure 15A, the tool body 2 can be divided into a first body portion 21 and a second body portion 22 in the vertical direction. The locking body 3A is connected to the tool body 2 while being sandwiched between the first body portion 21 and the second body portion 22 (see Figure 15B).

[0046] The first main body 21 and the second main body 22 are fastened and fixed together by fixing pins P1 and P2. The fixing pins P1 and P2 are made of bolts. However, the method of fixing the first main body 21 and the second main body 22 is not limited to the fixing pins (bolts) P1 and P2.

[0047] (Eighth embodiment) This embodiment is a modified version of the seventh embodiment. In this embodiment, as shown in Figures 16A and 16B, washer blocks 23A and 23B are provided between the first main body 21 and the second main body 22. The locking body 3A is then sandwiched between the first main body 21 and the second main body 22 via the washer blocks 23A and 23B (see Figure 16C).

[0048] The washer blocks 23A and 23B indirectly increase the contact area between the locking body 3A and the first main body portion 21 and the second main body portion 22. The method of fixing the first main body portion 21 and the second main body portion 22 is not specified, as in the seventh embodiment.

[0049] (Ninth Embodiment) This embodiment utilizes the fact that the locking body 3A and the gripping body 3B form a roughly T-shape, as shown in Figure 17. The insertion opening 2C is configured such that when the locking body 3A is inserted and rotates, the tool body 2 and the locking body 3A can be locked together.

[0050] Specifically, as shown in the order of Figures 18A → 18B → 18C → 18D, when the locking body 3A inserted into the tool body 2 from the insertion port 2C rotates approximately 90 degrees relative to the tool body 2 with the gripping body 3B as the rotational axis, the locking body 3A becomes locked to the tool body 2.

[0051] The anti-rotation pin 2G maintains the locking body 3A in a locked state with the tool body 2. Specifically, it is a bolt that restricts the locking body 3A from rotating in the opposite direction to the rotation shown in Figures 18A → 18B → 18C → 18D.

[0052] (Tenth embodiment) As shown in Figure 19, the tool body 2 according to this embodiment is provided with multiple insertion ports 2C. This makes it possible to set the connection position between the tool body 2 and the connecting tool 3 to a position appropriate for the construction site.

[0053] (Other embodiments) The tamping tool 1 according to the above embodiment was a tamping tool 1 for realizing a tamping work method that applies at least "a force that presses the ballast diagonally toward the underside of the sleeper" to the ballast. However, this disclosure is not limited thereto.

[0054] In other words, the disclosure may be, for example, a tamping method that applies only a force to the ballast that diagonally presses it toward the underside of the sleeper, or a tamping tool that realizes this tamping method.

[0055] The tamping tool 1 according to the above embodiment was provided with inclined surfaces 2A and 2B to realize the above tamping work method. However, this disclosure is not limited thereto.

[0056] In other words, if the machine 4 that generates pressing force on the tamping tool is capable of pressing the tamping tool diagonally toward the underside of the sleeper, the tamping method can be realized without providing inclined surfaces 2A and 2B on the tamping tool.

[0057] In the embodiments described above, the tool body 2 and the connecting tool 3 were separate parts. However, this disclosure is not limited thereto. That is, the disclosure may also include, for example, a tamping tool 1 in which the tool body 2 and the connecting tool 3 are manufactured as a single integrated part.

[0058] Furthermore, this disclosure is not limited to the embodiments described above, but is sufficient to be consistent with the intent of the disclosures described in the embodiments described above. Therefore, it may be a configuration in which at least two of the embodiments described above are combined, or a configuration in which any of the illustrated components or components described with reference numerals in the embodiments described above are omitted. [Explanation of Symbols]

[0059] 1… Tamping tool 2… Tool body 2A… Inclined surface 2B… Inclined surface 2C… Socket 3… Linking tool 3A… Locking body 3B... Gripping body

Claims

1. In tamping tools used during the tamping process to compact ballast laid beneath railway ties, The tool body is tapered such that the cross-sectional area in the direction perpendicular to the vertical direction (hereinafter referred to as the vertical width direction) decreases as you move from the upper end to the lower end in the vertical direction (hereinafter simply referred to as the "vertical direction") during tamping operations. Of the tool body, at least one side in the vertical direction is made up of an inclined surface that is tilted with respect to the vertical direction. Furthermore, the dimensions of the inclined surface in the horizontal direction perpendicular to the vertical and vertical directions are substantially constant in the vertical direction, in a tamping tool.

2. The tamping tool according to claim 1, wherein the inclined surface is configured to be planar.

3. The tamping tool according to claim 1, wherein the inclined surface is configured in a curved shape.

4. The tamping tool according to claim 2, wherein the side surface of the tool body on the other end in the vertical direction is configured as a plane substantially parallel to the vertical direction.

5. The tamping tool according to any one of claims 1 to 4, wherein the inclined surface is provided with a plurality of protrusions.

6. The tamping tool according to any one of claims 1 to 4, wherein the inclined surface is provided with a plurality of recesses.

7. The tamping tool according to any one of claims 1 to 4, wherein a flange portion is provided on the upper end of the tool body, projecting in a direction perpendicular to the vertical direction from the tool body.

8. The system includes a connecting tool that connects the tamping machine to the tool body, The tool body is provided with an insertion slot into which the connecting tool is inserted. Furthermore, the tamping tool according to claim 1, wherein the connecting tool is prevented from coming out of the insertion opening by a fixing pin attached to the tool body.

9. The system includes a connecting tool that connects the tamping machine to the tool body, The tool body is divisible into a first body part and a second body part. The tamping tool according to claim 1, wherein the connecting tool is connected to the tool body while being sandwiched between the first body and the second body portion.

10. The tamping tool according to claim 8, wherein a plurality of insertion ports are provided.

11. In the tamping method for compacting ballast laid beneath railway ties, A tamping method that applies a force to the ballast that presses it diagonally, at least toward the underside of the sleeper.

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