Drum

Abstract

To provide a drum capable of improving assembly efficiency.SOLUTION: A drum 1 includes a cylindrical body 3 with a linear member W wound around its outer circumference, and a pair of flanges 5, 5 formed integrally with the body 3 on both axial sides of the body 3. The pair of flange portions 5, 5 are formed in a disc shape. An opening 7 is provided on the flange portion 5 side of the body 3, into which the end of the linear member W is inserted inward. The opening 7 is inclined relative to a straight line L perpendicular to the rotational axis of the body 3.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a drum. [Background technology]

[0002] Conventionally, a drum has been known that includes a cylindrical body around which a conductive path as a linear member is wound, and a pair of disk-shaped flanges that are integral with the body and are provided on both axial sides of the body (see Patent Document 1). In this drum, the flanges are provided with openings into which the ends of the conductive path are inserted. When winding the conductive path around the body of such a drum, first, a string is tied to the end of the conductive path, and the string is fixed to the conductive path with tape, leaving an excess length. Next, the end of the conductive path is inserted into the opening in the flange, and the excess length of the string is fixed to the flange with a fixing member such as a nail. The drum is then rotated by a winding device or the like to wind the conductive path around the body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-138840 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with a drum such as that disclosed in Patent Document 1, many assembly steps are required before winding the linear member around the body, such as tying a string to the linear member, inserting the linear member into the opening of the flange, and fixing the excess length of the string to the flange, reducing ease of assembly. In addition, even after the linear member is pulled out from the body, the string must be removed from the linear member, reducing ease of assembly.

[0005] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a drum that can be easily assembled. [Means for solving the problem]

[0006] The drum of this embodiment comprises a cylindrical body around which a linear member is wound, and a pair of disk-shaped flanges formed integrally with the body on both axial sides of the body, with an opening on the flange side of the body through which the end of the linear member is inserted, and the opening is inclined with respect to a line perpendicular to the rotation axis of the body. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a drum that can be easily assembled. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the drum according to the embodiment. [Figure 2] FIG. 2 is a front view of the drum according to the embodiment. [Figure 3] 4 is a cross-sectional view showing a state in which a linear member is being wound around the drum according to the embodiment. FIG. [Figure 4] FIG. 2 is a cross-sectional view of the drum according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The drum according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0010] As shown in Fig. 1, the drum 1 according to this embodiment is used to store or transport a long and heavy linear member W (see Fig. 3), such as a cable. The drum 1 is stored or transported with the linear member W wound around it.

[0011] As shown in FIGS. 1 to 4, the drum 1 includes a body 3, a pair of flanges 5, 5, and an opening .

[0012] The body 3 is made of wood, for example. The body 3 is formed into a hollow columnar (cylindrical) shape by stacking multiple plates of equal length in the circumferential direction. The body 3 is not limited to wood, and may be formed from a metal material or the like. In addition, the body 3 may be formed into a hollow columnar shape from a single piece of wood (or a single piece of metal) instead of being formed by stacking multiple plates. A linear member W is wound around the outer circumferential surface of the body 3 in multiple turns as the drum 1 rotates using a winding device (not shown) or the like.

[0013] The pair of flanges 5, 5 are disposed on both axial sides of the body 3, and are each formed integrally with the body 3. The pair of flanges 5, 5 are formed symmetrically, and the following description will focus on one of the flanges 5, and the description of the other flange 5 will be omitted.

[0014] The flange 5 is made of wood, for example. The flange 5 is formed into a disk shape by overlapping multiple plates of different lengths in a planar direction so that the outer shape is circular. The outer diameter of the flange 5 is set to be larger than the outer diameter of the body 3. The flange 5 is not limited to wood, and may be formed of a metal material or the like. In addition, the flange 5 may be formed into a disk shape from a single piece of wood (or a single piece of metal) rather than being formed by overlapping multiple plates. For example, the axial end of the body 3 is disposed on the center side of the flange 5, and the body 3 is fixed thereto by a fixing means (not shown) such as a bolt, nail, adhesive, or press fit. Therefore, the body 3 and the pair of flanges 5, 5 rotate integrally.

[0015] The pair of flanges 5, 5 prevent the linear member W from falling off the body 3 when the linear member W is wound around the body 3, and guide the winding of the linear member W around the body 3. Before winding the linear member W around the body 3, it is necessary to fix the end of the linear member W to the body 3. For this purpose, an opening 7 is provided in the body 3.

[0016] The opening 7 is formed as a through-hole penetrating the body 3 so as to connect the outside and the inside of the body 3. The inside diameter of the opening 7 is the same. The opening 7 is located on the flange 5 side of the body 3 so as to be adjacent to the flange 5. By locating the opening 7 on the flange 5 side, the starting point when winding the linear member W around the body 3 is the flange 5 side, and the linear member W can be wound evenly around the body 3 by rotation of the drum 1. A plurality of openings 7 (two in this example) are provided on at least the pair of flanges 5, 5 side of the body 3 so as to be adjacent to the pair of flanges 5, 5. By providing an opening 7 on each of the pair of flanges 5, 5, the end of the linear member W can be fixed to one of the openings 7, eliminating the need to determine the orientation when installing the drum 1 and improving assembly ease. Although one opening 7 is provided in the circumferential direction of the body 3 on one flange 5 side, this is not limiting, and multiple openings 7 may be provided in the circumferential direction of the body 3. In this case, it is not necessary to determine the rotation direction when installing the drum 1, which further improves the ease of assembly.

[0017] The inner surface of the opening 7 is inclined with respect to a line L perpendicular to the rotation axis of the body 3. By inclining the opening 7, when the end of the linear member W is inserted into the opening 7, the end of the linear member W can move along the inner circumferential surface of the body 3. For example, if the opening 7 is formed along the line L, the end of the linear member W inserted into the opening 7 moves toward the center of the body 3. In this case, the linear member W and the opening 7 are likely to be arranged parallel to each other inside the body 3, and when an external pull-out force is applied to the linear member W, the linear member W is likely to come out of the opening 7. In contrast, when the linear member W is inserted into the inclined opening 7, the end moves along the inner circumferential surface of the body 3, and the linear member W is therefore arranged so that the linear member W and the opening 7 intersect inside the body 3. Therefore, even when an external pull-out force is applied to the linear member W, the linear member W is less likely to come out of the opening 7, and the linear member W can be stably held in the body 3.

[0018] The inner surface of the hole of the opening 7 is inclined at an angle θ between the rotation axis of the body 3 and a straight line L perpendicular thereto, in the range of 10° to 45°. If the angle θ is less than 10°, when starting to wind the linear member W around the body 3, a load is likely to be applied to the linear member W due to the winding, which may cause damage to the linear member W. In addition, as described above, the linear member W inserted in the opening 7 is likely to come out of the opening 7. If the angle θ is more than 45°, the torque when winding the linear member W around the body 3 is not easily applied to the linear member W, which may cause the linear member W to come out of the opening 7 when winding begins. Therefore, by setting the angle θ in the range of 10° to 45°, the linear member W can be stably wound around the body 3 without being damaged or coming out of the opening 7.

[0019] The opening 7 is opened in a range of 150% to 200% of the diameter of the linear member W. If the opening of the opening 7 is less than 150% of the diameter of the linear member W, the inner surface of the opening 7 may interfere with the linear member W when the linear member W is inserted into the opening 7, possibly causing damage to the linear member W. If the opening of the opening 7 is more than 200% of the diameter of the linear member W, the linear member W may easily vibrate inside the opening 7 when inserted into the opening 7, possibly causing damage to the linear member W. Therefore, by setting the opening of the opening 7 in a range of 150% to 200% of the diameter of the linear member W, the linear member W will not be damaged and can be stably held in the opening 7. It is more preferable to set the opening of the opening 7 in a range of 150% to 190% of the diameter of the linear member W.

[0020] An end of the linear member W is inserted into this opening 7 before winding the linear member W around the body 3. The opening 7 is inclined with respect to a line L perpendicular to the rotation axis of the body 3, and therefore the linear member W and the opening 7 are positioned inside the body 3 so as to intersect. Therefore, even if an external force is applied to the linear member W to pull it out, the linear member W is less likely to come out of the opening 7, and the linear member W can be stably held in the body 3. By inserting the linear member W into the opening 7 in this way, the linear member W can be fixed to the body 3, eliminating the need for a process such as tying a string to the linear member W, thereby improving assembly efficiency. In addition, even after pulling out the linear member W from the body 3, there is no need to remove the string or the like from the linear member W, thereby improving assembly efficiency. Furthermore, because no string, tape, or other removed material remains, the appearance of the linear member W can be maintained. Furthermore, since the linear member W is simply inserted into the opening 7, manual work by an operator is not required, and the process can be automated, thereby reducing the number of workers required.

[0021] Such a drum 1 includes a cylindrical body 3 around which a linear member W is wound, and a pair of disk-shaped flanges 5, 5 formed integrally with the body 3 on both axial sides of the body 3. An opening 7 is provided on the flange 5 side of the body 3, into which an end of the linear member W is inserted. The opening 7 is inclined with respect to a straight line L that is perpendicular to the rotation axis of the body 3.

[0022] An end of the linear member W is inserted into the opening 7 before the linear member W is wound around the body 3. The opening 7 is inclined with respect to a line L that is perpendicular to the rotation axis of the body 3, and therefore the linear member W and the opening 7 are positioned so as to intersect inside the body 3. Therefore, even if an external force is applied to pull out the linear member W, the linear member W is unlikely to come out of the opening 7, and the linear member W can be stably held in the body 3.

[0023] Therefore, in such a drum 1, the linear member W can be fixed to the body 3 by inserting the linear member W into the opening 7, eliminating the need for a process such as tying a string to the linear member W, thereby improving assembly efficiency. In addition, even after the linear member W is pulled out from the body 3, there is no need to remove the string or the like from the linear member W, thereby improving assembly efficiency.

[0024] A plurality of openings 7 are provided so as to be positioned at least on the pair of flange portions 5, 5 sides, respectively.

[0025] Therefore, the end of the linear member W can be fixed to either one of the openings 7, and there is no need to determine the orientation when installing the drum 1, thereby improving ease of assembly.

[0026] The opening 7 is opened in the range of 150% to 200% of the diameter of the linear member W.

[0027] Therefore, when the linear member W is inserted into the opening 7 or while the linear member W is inserted into the opening 7, no damage occurs to the linear member W, and the linear member W can be stably held in the opening 7.

[0028] Moreover, the opening 7 is inclined such that the angle θ formed between the rotation axis of the body 3 and a straight line L perpendicular thereto is in the range of 10° to 45°.

[0029] Therefore, when the linear member W is wound around the body 3, the linear member W is not damaged or comes off through the opening 7, and the linear member W can be wound around the body 3 stably.

[0030] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0031] For example, the linear member is a cable, but this is not limited to this, and the linear member may be, for example, a wire or a rope, and the linear member wound around the body may be any member. [Explanation of symbols]

[0032] 1 drum 3. Torso 5. Tsuba 7 Openings L straight line W Linear member θ angle

Claims

1. a cylindrical body around which a linear member is wound; a pair of flanges formed in a disk shape and integrally provided with the body on both axial sides of the body; Equipped with an opening into which an end of the linear member is inserted toward the inside is provided on the flange side of the body; The opening is inclined with respect to a line perpendicular to the rotation axis of the drum body.

2. The drum according to claim 1 , wherein a plurality of the openings are provided so as to be positioned on at least one of the pair of flange portions.

3. 3. The drum according to claim 1, wherein the opening has a size in the range of 150% to 200% of the diameter of the linear member.

4. The drum according to claim 1 or 2, wherein the opening is inclined at an angle between the rotation axis of the body and a line perpendicular thereto in a range of 10° to 45°.

Images