Traveling drum

Abstract

To provide a traveling drum which can avoid repair or new formation of a bolt hole on a drum main body.SOLUTION: A traveling drum comprises a drum main body 20 which has a flange 21 extending to the outside AD1 in a drum axial direction, a mounting body 3 with which a traveling tire can contact, and a fastening member 6 which has a bolt hole 62 in which a screw groove 62a is formed. In the flange 21 and the mounting body 3, through-holes 22, 32 in which the screw groove is not formed are formed. A bolt 5 passing through the through-holes 22, 32 of the flange 21 and the mounting body 3 is fastened to the bolt hole 62 of the fastening member 6 disposed on the inside RD2 in a drum radial direction of the flange 21, whereby the mounting body 3 can be fixed to the drum main body 20. The portion of the fastening member 6 which faces an inner peripheral surface 21a of the flange 21 has a curved surface 6a curved in the same direction as a curvature direction of the inner peripheral surface 21a of the flange 21.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a running drum used in tire performance testing. [Background technology]

[0002] Conventionally, indoor drum tests have been carried out using an indoor drum testing machine equipped with a running drum to evaluate various tire performances. Patent Document 1 discloses that the running drum is composed of a drum body and a plate that is detachable from the drum body, and a simulated road surface is formed on the plate. The running drum is rotated while the tire is pressed against it, allowing the tire to run on the simulated road surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-218470 Summary of the Invention [Problem to be solved by the invention]

[0004] In an indoor drum test machine, various attachments are used depending on the driving conditions and the like, and are attached to the drum body. Examples of the attachments include a plate having the above-mentioned simulated road surface and a protruding piece that reproduces the tire climbing over a step. When an attachment such as a plate or a protruding piece having a simulated road surface is configured to be freely attached to and detached from the drum body via a fastener such as a bolt, the thread groove of the bolt hole formed in the drum body may be worn out by repeated attachment and detachment via the fastener. When the thread groove is worn out, it is necessary to repair the worn bolt hole or to separately form a bolt hole in the drum body. Repeated formation of bolt holes in the drum body may cause deterioration of the mass balance due to the circumferential deviation of the bolt holes in the drum body. It is preferable to avoid repairing or newly forming bolt holes in the drum body.

[0005] The present disclosure provides a traveling drum that can avoid the need to repair or form new bolt holes in the drum body. [Means for solving the problem]

[0006] The running drum of the present disclosure comprises a drum body having a flange at the drum axial end extending outward in the drum axial direction, a mounting body with which a running tire can contact, and a fastening member having a bolt hole with a thread groove formed therein, the flange and the mounting body have through holes without thread grooves formed therein, and the mounting body can be fixed to the drum body by fastening the bolts inserted into the through holes of the flange and the mounting body to the bolt holes of the fastening member positioned radially inward of the flange, and the portion of the fastening member facing the inner surface of the flange has a curved surface that is curved in the same direction as the curvature of the inner surface of the flange. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing an example of an indoor drum testing machine 1 equipped with a traveling drum 2. [Diagram 2] 2 is a schematic diagram showing the configuration of the traveling drum 2 with the mounting body 3 attached thereto, as viewed from the drum axial direction AD. FIG. [Diagram 3] 1 is a plan view of the drum main body 20 to which the mounting body 3 is attached, as viewed along the drum radial direction RD. [Figure 4] 2 is a side view of the drum main body 20 to which the mounting body 3 is attached, as viewed along the drum axial direction AD. FIG. [Diagram 5] FIG. 5 is a cross-sectional view of the VV portion in FIG. [Figure 6] 2 is a plan view of the fastening member 6 as viewed in the drum radial direction RD. FIG. [Figure 7] FIG. 7A is a side view of the fastening member 6 seen along the drum axial direction AD, FIG. 7B is a plan view of the fastening member 6 seen along the drum radial direction RD, and FIG. 7C is a plan view of the flange 21 of the drum body 20 seen from the drum radial outside RD1 towards the drum radial inside RD2. [Figure 8]Figure 8A is a side view of the fastening member 6 seen along the drum axial direction AD, Figure 8B is a plan view of the fastening member 6 seen along the drum radial direction RD, and Figure 8C is a plan view of the flange 21 of the drum body 20 seen from the drum radial outside RD1 towards the drum radial inside RD2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [First embodiment] Hereinafter, a first embodiment of the present disclosure will be described with reference to the drawings.

[0009] FIG. 1 is a schematic diagram showing an example of an indoor drum test machine 1 equipped with a traveling drum 2. FIG. 2 is a schematic diagram showing the traveling drum 2 with a mounting body 3 attached thereto, as viewed from the drum axial direction AD. As shown in FIG. 1, the indoor drum test machine 1 includes the traveling drum 2, the mounting body 3 that is detachable from the traveling drum 2, and a tire support 4 that supports the tire T by pressing it against the traveling drum 2 to which the mounting body 3 is attached. The traveling drum 2 is rotatably supported by a drum rotation shaft 11 that extends horizontally. A drum power source 12 such as a motor that rotates the traveling drum 2 is connected to the drum rotation shaft 11.

[0010] The tire support 4 supports the tire T by a tire rotation shaft 13 extending horizontally. A tire power source 14 such as a motor capable of applying a driving force or a braking force to the tire rotation shaft 13 is connected to the tire rotation shaft 13. As the tire power source 14, a brake may be used to apply a braking force, or a motor and a brake may be used in combination. A load cell 15 that measures torque and forces in three directions, i.e., front-rear force, left-right force, and vertical force of the tire T, and a fixing member 16 that fixes the tire rotation shaft 13 in the pressing direction (the up-down direction in FIG. 1 ) are attached to the tire rotation shaft 13.

[0011] The tire support 4 includes a lifting device 17 as a pressing means for pressing the tire T against the traveling drum 2. The lifting device 17 raises and lowers the tire power source 14. This allows the tire T attached to the tire rotating shaft 13 to be moved closer to or farther away from the traveling drum 2. The lifting device 17 configured to be able to raise and lower the traveling drum 2 may be used as the pressing means. The load of the tire T is adjusted to a predetermined value by the lifting device 17 based on the vertical force measurement result by the load cell 15, and then the tire rotating shaft 13 is fixed by the fixing member 16, whereby the tire T can be grounded on the drum main body 20 and the mounting body 3 with a predetermined load.

[0012] The indoor drum test machine 1 includes a control unit 18 that controls the operation of the indoor drum test machine 1. The control unit 18 can be configured using a computer such as a personal computer or a PLC (programmable logic controller). The control unit 18 is electrically connected to the drum power source 12, the tire power source 14, the load cell 15, the fixed member 16, and the lifting device 17, and is configured to be able to control the operation of each of these components.

[0013] The traveling drum 2 has a drum main body 20 and a mounting body 3 that is detachable from the drum main body 20. The mounting body 3 is a member with which a traveling tire can come into contact. The mounting body 3 in the first embodiment is a protruding piece that simulates a step that the tire T overcomes, and is formed in a rod shape extending in the drum axial direction AD, and is a member whose length in the drum axial direction AD is longer than its length in the drum circumferential direction CD. In the first embodiment, the mounting body 3 is attached to the drum main body 20 at one location on the circumference of the drum main body 20, and the tire comes into contact with the drum main body 20 and the mounting body 3. The number of mounting bodies 3 attached to the drum main body 20 can be changed as appropriate.

[0014] FIG. 3 is a plan view of the drum body 20 to which the mounting body 3 is attached, as viewed along the drum radial direction RD. FIG. 4 is a side view of the drum body 20 to which the mounting body 3 is attached, as viewed along the drum axial direction AD. FIG. 5 is a cross-sectional view of the VV portion in FIG. 4. FIG. 6 is a plan view of the fastening member 6, as viewed along the drum radial direction RD. As shown in FIG. 5, the drum axial end of the drum body 20 has a flange 21 extending to the outer side AD1 in the drum axial direction. As shown in FIG. 4, the inner peripheral surface 21a of the flange 21 is an arc with the drum center as a reference, as viewed from a line of sight parallel to the drum axial direction AD. As shown in FIGS. 1 to 5, the mounting body 3 is fixed to the flange 21 of the drum body 20 by a bolt 5 and a fastening member 6. The bolt 5 is a headed bolt having a shaft with a thread groove and a head, and fastens the mounting body 3 to the drum body 20. In this embodiment, the bolt 5 is a headed bolt, but a headless threaded bolt with a nut may be substituted. The fastening member 6 has a bolt hole 62 (so-called female thread) in which a screw groove 62a corresponding to the bolt 5 is formed. The head of the bolt 5 and the fastening member 6 sandwich the mounting body 3 and the flange 21. The mounting body 3 has a through hole 32 (so-called a blind hole) through which the bolt 5 passes and in which no screw groove is formed. The flange 21 has a through hole 22 (so-called a blind hole) through which the bolt 5 passes and in which no screw groove is formed. The through hole 32 of the mounting body 3 and the through hole 22 of the flange 21 are so-called drilled holes, which are larger in radial dimension than the radial dimension of the shaft of the bolt 5, and are less likely to wear even if the bolt 5 is repeatedly fastened and removed. As shown in FIG. 5, when the bolt 5 is fastened, the bolt 5 passes through the through holes 22, 32 of the flange 21 and the mounting body 3. The fastening member 6 is disposed on the drum radial inner side RD2 of the flange 21. The bolt 5 is fastened to the bolt hole 62 of the fastening member 6, whereby the mounting body 3 can be fixed to the traveling drum 2 (the flange 21 of the drum main body 20).

[0015] 4, the portion of the fastening member 6 facing the inner peripheral surface 21a of the flange 21 has a curved surface 6a that curves in the same direction as the curvature direction of the inner peripheral surface 21a of the flange 21. It is preferable that the radius of curvature of the inner peripheral surface 21a of the flange 21 and the radius of curvature of the curved surface 6a of the fastening member 6 match. Even if the two radii of curvature do not match, as long as the curvature directions of the inner peripheral surface 21a of the flange 21 and the curved surface 6a of the fastening member 6 are the same, it is possible to reduce damage to the inner peripheral surface 21a of the flange 21 by the fastening member 6. In one embodiment, the diameter of the drum is 1707.567 mm, and the circumference of the drum is 1 / 300 mile (=5364.480 mm). Although it is difficult to visually recognize the curved surface 6a in FIG. 4, the curved surface 6a is actually curved.

[0016] As shown in Figures 1, 3 and 4, three bolts 5 for fixing one mounting body 3 are arranged at intervals in the drum circumferential direction CD on one side of the drum axial direction AD. A plurality of through holes 22, 32 corresponding to the three bolts 5 are formed in the flange 21 and the mounting body 3 at intervals in the drum circumferential direction CD. In addition, as shown in Figure 6, the fastening member 6 has a plurality (three) bolt holes 62 corresponding to the plurality of through holes 22, 32. As a result, the fastening of the mounting body 3 to the drum main body 20 by the plurality of bolts 5 is stronger than when one bolt hole 62 is formed in one fastening member 6.

[0017] The drum body 20 including the flange 21 is formed of a magnetic material such as iron. The fastening member 6 is formed of a magnetic material such as iron. As shown in FIG. 6, the fastening member 6 has a magnet 63. For the magnet 63, for example, a material described in "JIS C2502:2019" can be used. The magnet 63 makes the fastening member 6 magnetic, and the fastening member 6 is configured to be attracted to the flange 21 by magnetic force. The worker who attaches the attachment body 3 needs to work from the drum radial outer side RD1 of the drum body 20 (flange 21) to the drum radial inner side RD2 of the flange 21, which makes it easy to drop the fastening member 6. However, if the fastening member 6 can be attracted to the flange 21 by magnetic force, it is possible to prevent the fastening member 6 from being accidentally dropped during the fastening work of the fastening member 6.

[0018] As shown in Figs. 4 to 6, the fastening member 6 has a positioning portion 61 that abuts against the end face 23 of the drum axial outer side AD1 of the drum body 20 when the fastening member 6 is in a fastening position where the bolt hole 62 and the through holes 22, 32 are overlapped (the state shown in Fig. 5). The positioning portion 61 of the first embodiment has a pair of L-shaped arms 61A that extend to the drum axial outer side AD1 and bend to the drum radial outer side RD1, and a connecting arm 61B that connects the tips of the pair of arms 61A. The pair of arms 61A are fixed to the fastening member 6 by a fastener 64. The length of the pair of arms 61A in the drum axial direction AD is set so that the bolt hole 62 overlaps with the through holes 22, 32 when the pair of arms 61A are brought into contact with the end face 23 of the drum axial outer side AD1 of the drum body 20. As a result, by simply bringing the positioning portion 61 into contact with the end face 23 of the drum body 20, it is possible to easily position the fastening member 6 at a position where the through holes 22, 32 and the bolt hole 62 overlap in the drum axial direction AD, making the installation work easier. Furthermore, since a U-shaped portion is formed by the pair of arms 61A and the connecting arm 61B, the U-shaped portion can be used as a handle. The members (arm 61A and connecting arm 61B) constituting positioning portion 61 are preferably made of a non-magnetic material such as aluminum to prevent them from being attracted to end surface 23 of flange 21 by magnetic force.

[0019] An example of a method for mounting the mounting body 3 will be described. The fastening member 6 is attracted by magnetic force to the inner circumferential surface 21a on the drum radially inner side RD2 of the flange 21 of the drum main body 20. At this time, the positioning portion 61 is brought into contact with the end surface 23 of the flange 21, thereby positioning the through hole 22 of the flange 21 and the bolt hole 62 of the fastening member 6 in the drum axial direction AD. Next, as necessary, the fastening member 6 is slid in the drum circumferential direction CD to align the through hole 22 of the flange 21 with the bolt hole 62 of the fastening member 6 in the drum circumferential direction CD, and the mounting body 3 is fastened with the bolt 5.

[0020] [Variations] (A) The mounting body 3 in the above embodiment is a protruding piece, but is not limited thereto. For example, as shown in Patent Document 1, the mounting body 3 may be a plate on which a simulated road surface is formed. When the mounting body 3 is a plate having a simulated road surface, the outer circumferential surface of the drum body 20 is covered with a plurality of plates over its entire circumference, and each plate is fixed to the drum body 20 by a bolt 5 and a fastening member 6.

[0021] (B) In the above embodiment, as shown in Fig. 4, the portion of the fastening member 6 facing the inner peripheral surface 21a of the flange 21 is preferably formed as a curved surface 6a, but is not limited thereto. For example, it may be a flat surface.

[0022] (C) In the above embodiment, three bolt holes 62 are formed in one fastening member 6, but the number of bolt holes 62 can be changed. One or more bolt holes 62 may be formed in one fastening member 6. In the above embodiment, for the sake of explanation, an example is given in which the drum main body 20 has through holes 22 for passing three bolts 5 therethrough on one side in the drum axial direction AD, but the number of through holes 22 for passing the bolts 5 therethrough can be changed as appropriate depending on the mounting body 3 to be mounted. Also, the number of through holes 32 formed in the mounting body 3 can be changed as appropriate.

[0023] (D) In ​​the above embodiment, the fastening member 6 is made of a magnetic material and the magnet 63 is embedded as a permanent magnet, but this is not limiting. For example, a mechanism capable of turning on and off the magnetic force may be provided. As a specific example, a magnetic chuck may be used in which the magnetic force can be turned on and off by making the permanent magnet movable and switching the formation of the magnetic circuit, or an electromagnet may be used in which the magnetic force can be turned on and off by passing current through it.

[0024] (E) An elastic member such as rubber may be disposed between the inner peripheral surface 21a of the flange 21 and the fastening member 6. By disposing an elastic member such as rubber, it is possible to prevent the fastening member 6 from damaging the inner peripheral surface 21a of the flange 21. An elastic member with magnetic force (such as magnet rubber) may be used. In this case, it is possible to prevent the fastening member 6 from damaging the inner peripheral surface 21a of the flange 21 and to prevent the fastening member 6 from falling off at the same time.

[0025] 7A-C and 8A-C, concave-convex shapes 161, 162 [261, 262] for positioning the fastening member 6 in the drum circumferential direction CD and the drum axial direction AD with respect to the drum body 20 may be formed between the fastening member 6 and the inner peripheral surface 21a of the flange 21. The concave-convex shape 161 (261) formed on the fastening member 6 and the concave-convex shape 162 (262) formed on the inner peripheral surface 21a of the flange 21 fit together, thereby enabling the fastening member 6 to be positioned. One example is shown in Figures 7A, 7B, and 7C. Figure 7A is a side view of the fastening member 6 seen along the drum axis direction AD, Figure 7B is a plan view of the fastening member 6 seen along the drum radial direction RD, and Figure 7C is a plan view of the flange 21 of the drum body 20 seen from the drum radial outer side RD1 toward the drum radial inner side RD2. As shown in Figures 7A, 7B, and 7C, the uneven shape 161 of the fastening member 6 is a linear protrusion extending in the drum axis direction AD. In Figure 7B, the linear protrusion is shown by hatching. In this example, the linear protrusion extends from one end of the fastening member 6 in the drum axis direction AD to the other end, but it does not have to reach the member end. As shown in Figure 7C, the uneven shape 162 formed on the inner peripheral surface 21a of the flange 21 is a linear recess. As shown in the figure, the linear recess extends from the end face 23 of the flange 21 in the drum axis direction AD. The linear protrusion and the linear recess fit together to position the fastening member 6 in the drum circumferential direction CD. The inner end (162a) of the linear recess (162) in the drum axial direction AD enables the fastening member 6 to be positioned in the drum axial direction AD. The linear recess does not have to open to the end face 23 of the flange 21. Another example is shown in Fig. 8A, Fig. 8B, and Fig. 8C. Fig. 8A is a side view of the fastening member 6 seen along the drum axial direction AD, Fig. 8B is a plan view of the fastening member 6 seen along the drum radial direction RD, and Fig. 8C is a plan view of the flange 21 of the drum body 20 seen from the drum radial outer side RD1 toward the drum radial inner side RD2. As shown in Fig. 8A, Fig. 8B, and Fig. 8C, the uneven shape 261 of the fastening member 6 is a plurality of protrusions. In Fig. 8B, the plurality of protrusions are hatched. As shown in Fig. 8C, the uneven shape 262 formed on the inner circumferential surface 21a of the flange 21 is a plurality of recesses. The plurality of protrusions and recesses fit together to enable the fastening member 6 to be positioned in the drum circumferential direction CD and the drum axial direction AD. In this embodiment, three combinations of recesses and protrusions are provided, but the number can be changed as long as there are a plurality of combinations of recesses and protrusions. The cross-sectional shape of the projections and recesses can be various shapes such as a square, a triangular, a trapezoidal, a semicircular dome, or the like. In the above, a protrusion is formed on the fastening member 6 and a recess is formed on the flange 21, but a recess may be formed on the fastening member 6 and a protrusion may be formed on the flange 21. It is also possible to provide both a protrusion and a recess on the fastening member 6 and provide a recess and a protrusion on the flange 21 that correspond to the protrusion and recess of the fastening member 6.

[0026] (G) The axes of the bolts 5 inserted through the bolt holes 62 of the fastening member 6, the through holes 22 of the flange 21, and the through holes 32 of the mounting body 3 preferably extend in a direction toward the center of curvature of the drum body 20 in accordance with the curvature of the outer circumferential surface and the inner circumferential surface 21a of the flange 21 of the drum body 20 in the drum circumferential direction CD, but are not limited to this. The axes of the bolts 5 may be parallel to each other.

[0027] [1] As described above, in the above embodiment, the traveling drum 2 comprises a drum body 20 having a flange 21 extending toward the outer side AD1 in the drum axial direction at its drum axial end, and a fastening member 6 having a bolt hole 62 in which a thread groove 62a is formed, and the flange 21 and the mounting body 3 are formed with through holes 22, 32 in which no thread groove is formed, and the bolt 5 inserted into the through holes 22, 32 of the flange 21 and the mounting body 3 is fastened to the bolt hole 62 of the fastening member 6 arranged on the inner side RD2 in the drum radial direction of the flange 21, thereby fixing the mounting body 3 to the drum body 20, and the portion of the fastening member 6 facing the inner surface 21a of the flange 21 may have a curved surface 6a curved in the same direction as the curvature direction of the inner surface 21a of the flange 21.

[0028] In this way, the through holes 22, 32 are formed in the drum body 20 and the mounting body 3, and the bolt hole 62 having the thread groove 62a is formed in the fastening member 6. Therefore, even if the thread groove 62a becomes worn, it is only necessary to replace the fastening member 6, and it is possible to avoid repair work on the drum body 20 or the formation of a new bolt hole. Furthermore, a curved surface 6a is formed in the fastening member 6 at a portion corresponding to the inner surface 21a of the flange 21 of the drum body 20, the curved surface 6a being curved in the same direction as the curvature of the inner surface 21a of the flange 21. This makes it possible to prevent the fastening member 6 from damaging the inner surface 20a of the drum body 20 compared to when the fastening member 6 is formed as a flat surface.

[0029] [2] In the traveling drum 2 described in [1] above, the fastening member 6 may have a positioning portion 61 that abuts against the end face 23 of the drum axially outer side AD1 of the drum body 20 when the fastening member 6 is in a fastening position where the bolt hole 62 and the through holes 22, 32 overlap. By simply placing the positioning portion 61 against the end face 23 of the drum body 20 in the drum axial direction outside AD1, the fastening member 6 can be positioned at the fastening position where the bolt hole 62 and the through holes 22, 32 overlap in the drum axial direction AD, making the fastening work easier.

[0030] [3] The traveling drum 2 described in [1] or [2] above may have a plurality of through holes 22, 32 formed in the flange 21 and the mounting body 3 at intervals in the drum circumferential direction CD, and the fastening member 6 may have a plurality of bolt holes 62 corresponding to the plurality of through holes 22, 32. Since the fastening member 6 has a plurality of bolt holes 62, the mounting body 3 can be firmly fastened to the drum body 20 by a plurality of bolts 5.

[0031] [4] The traveling drum 2 may be as described in any one of [1] to [3] above, wherein the flange 21 is formed of a magnetic material, the fastening member 6 has a magnet 63, and the fastening member 6 is configured to be attracted to the flange 21 by magnetic force. It is possible to prevent the fastening member 6 from being accidentally dropped during the fastening operation of the fastening member 6.

[0032] [5] The traveling drum 2 may be as described in [1] to [4] above, wherein uneven shapes 161, 162 [261, 262] are formed between the fastening member 6 and the inner surface 21a of the flange 21 for positioning the fastening member 6 in the drum circumferential direction CD and the drum axial direction AD relative to the drum main body 20. The recessed and protruding shapes 161, 162 [261, 262] fit together to position the fastening member 6 relative to the drum main body 20 in the drum circumferential direction CD and the drum axial direction AD, making the fastening member 6 easy to fasten.

[0033] Although the embodiments of the present disclosure have been described above based on the drawings, the specific configurations should not be considered to be limited to these embodiments. The scope of the present disclosure is indicated not only by the description of the above-mentioned embodiments but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

[0034] The structures employed in the above-described embodiments may be employed in any other embodiment. The specific configurations of the components are not limited to the above-described embodiments, and may be modified in various ways without departing from the spirit of the present disclosure. [Explanation of symbols]

[0035] 2: Traveling drum 3: Wearable body 5: Bolt 6: Fastening member 20: Drum body 21: Flange 22, 32: Through holes 23: End face 61: Positioning section 62: Bolt hole 62a: Thread groove 63: Magnet 161: Uneven shape 162: Uneven shape 261: Uneven shape 262: Uneven shape AD: Drum axial direction AD1: Outer side of drum axis CD: Drum circumferential direction RD: Radial direction of drum RD2: Radial inner side of drum T: Tire

Claims

1. a drum body having a flange at an axial end of the drum body and extending outward in the axial direction of the drum; A mounting body that can be contacted by a traveling tire; A fastening member having a bolt hole with a thread groove formed therein, The flange and the mounting body have through holes that are not threaded, a bolt inserted through the through hole of the flange and the attachment body is fastened to the bolt hole of the fastening member arranged on the inner side of the flange in the drum radial direction, whereby the attachment body can be fixed to the drum main body; A traveling drum, wherein a portion of the fastening member facing the inner circumferential surface of the flange has a curved surface that is curved in the same direction as the curvature of the inner circumferential surface of the flange.

2. The traveling drum according to claim 1 , wherein the fastening member has a positioning portion that abuts on an outer end surface of the drum body in the drum axial direction when the fastening member is in a fastening position where the bolt hole and the through hole overlap.

3. The traveling drum according to claim 1 or 2, wherein the flange and the mounting body have a plurality of through holes formed at intervals in the drum circumferential direction, and the fastening member has a plurality of bolt holes corresponding to the plurality of through holes.

4. 2. The traveling drum according to claim 1, wherein the flange is formed of a magnetic material, the fastening member has a magnet, and the fastening member is configured to be attracted to the flange by magnetic force.

5. The traveling drum according to claim 1 , wherein a concave-convex shape is formed between the fastening member and an inner peripheral surface of the flange for positioning the fastening member in the drum circumferential direction and the drum axial direction relative to the drum main body.

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