JP7264479B2 - drum - Google Patents

Description

The present invention relates to a drum on which a long object can be wound.

2. Description of the Related Art Conventionally, there has been known a drum for winding and storing a flexible long object. The drum includes, for example, a substantially cylindrical body and substantially disc-shaped flanges provided at both ends of the body and having a larger diameter than the body, and a long object is wound around the body. (See, for example, Patent Document 1, etc.). The body and collar are formed separately and stored and transported separately prior to assembly into the drum.

Further, a substantially annular groove portion into which the end portion of the body portion is fitted is provided on the rear surface of the collar portion (the surface facing the body portion). The end of the barrel is provided with a positioning projection that protrudes outward (in the longitudinal direction of the barrel) from the end of the barrel and is inserted into the groove of the flange. Further, the groove of the flange is provided with a positioning recess that is deeper than the groove and into which the positioning protrusion is fitted.

As a procedure for assembling the drum, first, the flange is installed with the rear surface facing upward, and the body is placed on the flange by inserting the positioning projection into the groove of the flange. At this time, for example, when the leading end (lower end) of the positioning projection abuts the bottom surface (upper surface) of the groove, the end of the body is separated from the bottom surface of the groove, and the positioning projection In such a manner that the body portion is guided by the groove portion, the body portion is made to be rotatably displaceable relative to the collar portion. As a result of rotating and displacing the barrel, the positions of the positioning projection and the positioning recess of the groove are aligned, so that the positioning projection is inserted into and fitted into the positioning recess, and the barrel is moved. It is inserted until the end of the portion abuts the bottom surface of the groove portion of the collar portion. As a result, the relative displacement between the body portion and the collar portion in the inward and outward directions of the body portion is more preferably regulated, and the relative rotational displacement between the body portion and the collar portion is also regulated. state.

Next, prepare another collar, place it on top of the body with the back side facing downward, and fit the positioning protrusion of the body into the positioning recess of the lower collar in the same way. (This time, the upper collar is moved instead of the body), and the positioning projection of the body is fitted into the positioning recess of the upper collar. After that, the drum is assembled by fixing between the pair of flanges and the body using bolts and nuts.

JP-A-2002-37532

However, in the drum assembly work, when the positioning projections are brought into contact with the bottom surface of the groove portion and the body portion is pivotally displaced relative to the flange portion, the positioning projections may be damaged. is concerned.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems exemplified above, and an object of the present invention is to provide a drum in which the assembled state can be stabilized and the durability can be improved. .

Hereinafter, each means suitable for solving the above object will be described separately. It should be noted that actions and effects specific to the corresponding means will be added as necessary.

Means 1. A trunk around which a long object is wound, and flanges provided at both ends of the trunk and protruding outward from the outer peripheral surface of the trunk, wherein the trunk and the flange is configured as a separate body, and a drum formed by assembling the body and a pair of the flanges,
The trunk portion includes a substantially cylindrical main body portion and trunk-side abutting portions provided at least at both ends of the main body portion or in the vicinity thereof and protruding inward from the inner surface of the main body portion. ,
On the back surface of the collar portion facing the body portion,
a first engaging portion that engages with an end portion of the body portion in the assembled state of the drum;
a second engaging portion that engages with the body portion side contact portion in the assembled state of the drum;
In the engaged state between the end portion of the main body portion and the first engaging portion, relative displacement between the body portion and the flange portion in the inward and outward directions of the main body portion is restricted,
In the engaged state between the body side contact portion and the second engaging portion, rotational displacement of the body portion along the back surface of the collar portion is restricted,
In the process of assembling the drum, the end of the body portion and the first engagement portion face each other, and the end portion of the body portion engages with the first engagement portion. In an assembly preparation state in which the trunk-side abutment portion and the second engaging portion are not opposed to each other, the distal end portion of the trunk-side abutment portion in the extending direction of the main body portion a flange-side abutting portion that abuts;
In the assembly preparation state, the body portion is rotated along the back surface of the collar portion while maintaining the contact state between the front end portion of the body portion side contact portion and the collar portion side contact portion. A guide portion that can be guided until positions of the body portion side contact portion and the second engaging portion are aligned by dynamically displacing the body portion side contact portion,
From the assembly preparation state, the positions of the trunk-side abutment portion and the second engaging portion are brought into a state of matching, so that the distal end portion of the trunk-side abutment portion and the collar portion are aligned. A state in which the contact state with the side contact portion is released, the end portion of the body portion engages with the first engaging portion, and the body portion side contact portion engages with the second engaging portion and
The distal end portion of the trunk-side contact portion is located at the same position as the end portion of the main body portion in the extending direction of the main body portion, or at the center of the extending direction of the main body portion relative to the end portion of the main body portion. located on the side of the
The body portion has a stacking protrusion that protrudes inward from the inner surface of the main body portion and protrudes from one end of the main body portion to the outside in the extending direction of the main body portion,
When the trunk portions are stacked with the stacking projection projecting upward, the stacking projection of the lower trunk portion is inserted inside the upper trunk portion,
In the assembly preparation state, the collar part is configured to rotate the body part along the back surface of the collar part while bringing the body-side contact part into contact with the collar-side contact part. (2) a drum , further comprising a permissive portion that permits relative displacement of the stacking protrusion with respect to the flange portion ;

According to Means 1, when assembling the drum, even if it is not attempted to assemble the body and the collar so that the positions of the body-side abutting portion and the second engaging portion match from the beginning, By simply fitting the end of the main body to the first engaging portion, the tip of the trunk-side abutting portion and the collar-side abutting portion come into contact with each other, and the end of the main body and the first engaging portion are brought into contact with each other. While maintaining the state in which the parts are opposed to each other, an assembly preparation state can be established in which the rotational displacement of the body part along the back surface of the collar part is allowed. Further, in the assembly preparation state, the rotational displacement of the trunk along the back surface of the flange is guided until the positions of the trunk-side abutting portion and the second engaging portion are aligned. Therefore, it is possible to improve the assembling workability of the drum.

In addition, the trunk-side contact portion does not protrude from the end of the main body portion to the outside in the extending direction of the main body portion, so that the strength and rigidity of the front end portion of the trunk-side contact portion can be easily ensured. It is possible to prevent a situation in which the front end portion of the trunk-side contact portion is caught in a predetermined portion and the trunk-side contact portion is damaged. Therefore, it is possible to prevent the body-side contact portion from being damaged or deformed during the drum assembly work, and the body-side contact portion is engaged with the second engaging portion in the assembled state of the drum. By aligning them, the function of restricting the rotational displacement of the body portion along the back surface of the collar portion can be exhibited more reliably. As a result, the assembled state of the drum can be stabilized and the durability can be improved.
Furthermore, it is possible to prevent the stacking projections for stably stacking the drums from becoming a hindrance to the drum assembly work.
In addition, "the guide part is provided in the collar part, and in the assembly preparation state, a collar part side guide part that abuts or approaches the inner end part of the main body part among the stacking protrusions. , and the stacking protrusion. In the case of adopting this configuration, in this case, it is possible to provide the guide portion while suppressing the complication of the configuration of the trunk portion even in the configuration provided with the stacking protrusion.

Means 2. The drum according to means 1, wherein the flange-side contact portion is provided in an annular shape.

According to the means 2, in the assembly preparation state, the relative rotational displacement of the body with respect to the collar can be made smooth.

It should be noted that the term "annular" is meant to include an annular ring that is partially lacking. Further, "the guide part is provided in the body part, and in the assembly preparation state, the body side guide part that abuts or is close to the outer peripheral surface of the collar side contact part and the collar side contact part. It may be said that "it is configured by the department". In the case of adopting this configuration, when the barrel is rotated along the back surface of the flange in the assembly preparation state, the barrel-side guide portion can be brought into sliding contact with the ring-shaped flange-side contact portion. The function and effect of the means 2, such as making the rotational displacement of the part smoother, are further exhibited.

Means 3. The flange-side contact portion is configured in an annular shape and is continuously provided along the entire circumference,
The second engaging portion is configured by partially displacing the flange-side contact portion inwardly of the flange-side contact portion,
In the assembly preparation state, the front end portion of the trunk side contact portion contacts the back side edge of the collar portion side contact portion,
In the assembled state, a side surface of the trunk side contact portion extending in a direction intersecting the circumferential direction of the main body portion is positioned at the second engaging portion of the collar portion side contact portion. 3. The drum according to means 1 or 2, characterized in that the drum contacts or approaches a side surface extending in a direction intersecting the circumferential direction of the flange side contact portion.

According to the means 3, since the flange-side contact portion is provided continuously over the entire circumference of the ring, for example, compared to a shape in which the flange-side contact portion is partially missing, the flange-side contact portion The strength and rigidity of the side contact portion can be increased. In addition, in both the assembled state and the ready-to-assemble state of the drum, the body side contact portion and the flange side contact portion are configured to be in contact with each other. The contact portion (direction of contact) between the body-side contact portion and the collar-side contact portion differs from that in the preparation state. Therefore, it is possible to prevent a situation in which the (bad) effect of the contact (sliding contact) between the trunk side contact portion and the collar portion side contact portion in the assembly preparation state is exerted after the assembly state. can be done. It should be noted that the term "annular" is meant to include not only a circular ring but also a ring having corners.

Figure 3 is a perspective view of a drum; It is a perspective view of the surface side of a collar part. It is a perspective view including a partial cross section which shows the surface side of a collar part. It is a perspective view of the back side of a collar part. It is a perspective view including a partial cross section which shows the back side of a collar part. FIG. 4 is a perspective view of a torso; It is a perspective view including the partial cross section of a trunk|drum. It is sectional drawing which shows the state which stacked the collar parts. It is sectional drawing which shows the state which stacked the trunk|drums. FIG. 4 is a perspective view including a partial cross-section showing a state in which the end of the body is engaged with the engaging portion for assembly of the collar. FIG. 4 is a partially enlarged cross-sectional view showing a state (assembled state) in which the end portion of the body portion is engaged with the engaging portion for assembly of the collar portion; FIG. 4 is a cross-sectional view of the trunk in a state (assembled state) in which the end of the trunk is engaged with the engaging portion for assembly of the collar. FIG. 4 is a perspective view including a cross-section when cutting the trunk in a state (assembled state) in which the end of the trunk is engaged with the engaging portion for assembly of the collar. FIG. 3 is a perspective view including a partial cross-section showing a trunk portion and a collar portion in an assembly preparation state; FIG. 3 is a partially enlarged perspective view including a partial cross-section showing a trunk portion and a collar portion in an assembly preparation state; FIG. 3 is a perspective view including a partial cross-section showing a trunk portion and a collar portion in an assembly preparation state;

An embodiment will be described below with reference to the drawings. As shown in FIG. 1, a drum 1 used for transporting and storing a flexible long object has a substantially cylindrical body 2 around which the long object is wound, and It is provided at both ends with a substantially disc-shaped flange 3 having an outer diameter larger than that of the body 2 . The drum 1 is constructed by assembling the drum 1 so that the centers of the diameters of the drum 1 and the pair of flanges 3 are aligned on the same straight line. It is configured. Further, the barrel 2 and the pair of flanges 3 are connected using a bolt 4 and a nut 5 provided so as to pass through the barrel 2 and the pair of flanges 3 . The body portion 2 and the collar portion 3 of this embodiment are integrally formed of polypropylene.

As shown in FIGS. 4, 5, etc., a rear surface 6 of the flange 3 facing the body 2 has a first engaging portion that engages with the end of the body 2 when the drum 1 is assembled. As shown in FIG. 8, when the assembly engaging portion 11 and the flange portions 3 are directly stacked (stacked) with the back surface 6 facing upward, the upper flange portion 3 on the opposite side to the back surface 6 A stacking engagement portion 13 is provided which engages a recess 12 provided in the surface 7 .

More specifically, as shown in FIGS. 2 to 5, the flange portion 3 includes a substrate portion 14 made of a substantially annular flat plate, and an inner peripheral edge of the substrate portion 14 extending from the surface 7 side to the substrate portion 14. A circular frame-shaped (cylindrical) first inner peripheral rib 15 protruding in a direction perpendicular to the first inner peripheral rib 15 and a circular frame shape one size smaller than the first inner peripheral rib 15, and the inner side of the first inner peripheral rib 15 A second inner peripheral rib 16 provided so as to be concentric with the first inner peripheral rib 15, a connecting portion 17 that connects the first inner peripheral rib 15 and the second inner peripheral rib 16, and a second inner A central plate portion 18 having a substantially annular plate shape protrudes inward from the inner peripheral surface of the second inner peripheral rib 16 over the entire circumference of the peripheral rib 16 in the peripheral direction. The connecting portion 17 connects the first inner peripheral rib 15 and the portion of the second inner peripheral rib 16 closer to the central portion in the thickness direction than the edge of the second inner peripheral rib 16 on the back surface 6 side. In terms of form, the first inner peripheral rib 15 , the second inner peripheral rib 16 , and the connecting portion 17 constitute the engaging portion for assembly 11 that opens on the rear surface 6 side of the flange portion 3 . In addition, as shown in FIG. 5 and the like, the second inner circumferential rib 16 of the present embodiment has a portion on the front surface 7 side from the portion connected to the connecting portion 17 that is closer to the second inner circumferential portion than the portion on the back surface 6 side. Although the diameter is reduced by the thickness of the rib 16 and has a substantially crank-shaped cross section, it may be configured to have a straight cross-section.

In addition, as shown in FIG. In the thickness direction of the collar portion 3, the connecting inner peripheral portion 17a is closer to the edge of the first inner peripheral rib 15 on the surface 7 side, and the connecting outer peripheral portion 17b is closer to the first inner peripheral rib 15. A stepped shape is formed so as to be close to the edge of the peripheral rib 15 on the back surface 6 side. The connecting portion 17 includes a retaining wall portion 17c that connects the outer peripheral edge of the connecting inner peripheral portion 17a and the inner peripheral edge of the connecting outer peripheral portion 17b. It extends obliquely toward the outer peripheral portion 17b toward the back surface 6 and outward in the inner and outer directions of the flange portion 3 (the radial direction, the direction orthogonal to the central axis of the drum 1).

Further, as shown in FIG. 8 and the like, the edge of the second inner peripheral rib 16 on the surface 7 side is closer to the central portion in the thickness direction of the flange 3 than the edge of the first inner peripheral rib 15 on the surface 7 side. The center plate portion 18 is connected to the edge of the second inner circumferential rib 16 on the surface 7 side. Furthermore, as shown in FIGS. 2 and 4, etc., a circular central opening 21 penetrating through the central plate portion 18 is provided in the central portion of the central plate portion 18 . In addition, a circular frame-shaped shaft tube portion 22 protruding in a direction orthogonal to the central plate portion 18 from the peripheral portion of the central opening portion 21 on the back surface 6 side of the central plate portion 18 is provided.

The recessed portion 12 of the present embodiment is provided concentrically with the second inner peripheral rib 16 and the like at an intermediate position between the central opening 21 of the central plate portion 18 and the second inner peripheral rib 16, and the flange portion 3 is configured to have a substantially U-shaped cross section that is open on the surface 7 side of 3 . In addition, the stacking engaging portion 13 of the present embodiment protrudes in a direction perpendicular to the central plate portion 18 over the entire circumference of the recess 12 from the back surface 6 side of the wall portion that forms the bottom of the recess 12 . In this way, it is provided in the shape of a circular frame.

5 and 8, in the present embodiment, in the thickness direction of the flange portion 3, the edge of the stacking engagement portion 13 on the side of the back surface 6 is the back surface 6 of the second inner circumferential rib 16. It protrudes to the back surface 6 side (upper side in FIG. 8) from the side edge. Further, the rear surface 6 of the substrate portion 14 (the edge of the first inner peripheral rib 15 on the rear surface 6 side) is positioned at the same position as the edge of the second inner peripheral rib 16 on the rear surface 6 side. In addition, in the thickness direction of the flange portion 3 , the edge of the shaft tube portion 22 on the back surface 6 side is positioned at the same position as the edge of the second inner peripheral rib 16 on the back surface 6 side and the back surface 6 of the substrate portion 14 . It's becoming The second inner peripheral rib 16 and the shaft tube portion 22 are connected by an inner peripheral side reinforcing rib 23 via the stacking engaging portion 13 and the recessed portion 12. The edge of the rib 23 on the side of the back surface 6 is also at the same position as the edge of the cylindrical shaft portion 22 on the side of the back surface 6 in the thickness direction of the collar portion 3 .

In addition, as shown in FIGS. 3 and 8 , the collar portion 3 has a circular frame-shaped outer peripheral rib 24 that protrudes from the outer peripheral edge of the base plate portion 14 on the side of the surface 7 . In the thickness direction of the flange portion 3 , the edge of the outer peripheral rib 24 on the side of the surface 7 is at the same position as the edge of the first inner peripheral rib 15 on the side of the surface 7 . In addition, the outer peripheral rib 24 and the first inner peripheral rib 15 are connected by an outer peripheral reinforcing rib 25, and the edge of the outer peripheral reinforcing rib 25 on the side of the surface 7 also extends in the thickness direction of the flange 3. It is located at the same position as the edge of the outer peripheral rib 24 and the first inner peripheral rib 15 on the side of the surface 7 .

As shown in FIG. 8, when the flanges 3 are stacked with the rear surface 6 facing upward, the rear surface 6 of the substrate portion 14 of the lower flange 3 is aligned with the first inner circumference of the upper flange 3. The rib 15 , the outer peripheral rib 24 , and the edge of the outer peripheral reinforcing rib 25 on the surface 7 side are brought into contact with each other. Furthermore, the edge of the stacking engagement portion 13 of the lower flange portion 3 on the side of the back surface 6 is inserted into the recess 12 of the upper flange portion 3, and the inner peripheral surface of the stacking engagement portion 13 is inserted. , and the outer peripheral surface abuts or approaches (engages with) the side portion of the recess 12 .

In addition, on the surface 7 side of the central plate portion 18, a functional portion 26 that has undergone texturing so as to straddle the recessed portion 12 (in this example, the entire range of the surface 7 side of the central plate portion 18 and the second 2) is provided at the edge of the inner circumferential rib 16 on the surface 7 side. As described above, the central plate portion 18 is positioned closer to the central portion in the thickness direction of the flange portion 3 than the edge of the first inner peripheral rib 15 on the surface 7 side, and the fine unevenness of the functional portion 26 is also , the first inner peripheral rib 15 , the outer peripheral rib 24 , and the outer peripheral rib 25 are located closer to the central portion in the thickness direction of the collar portion 3 than the edges of the outer peripheral rib 25 on the surface 7 side.

In addition, as shown in FIGS. 2 and 4 , the flange 3 is provided with four bolt insertion portions 27 for inserting the bolts 4 in the assembly engaging portion 11 . The bolt insertion portion 27 is provided between the first inner peripheral rib 15 and the second inner peripheral rib 16 . is flush with the surface on the back surface 6 side of the . It should be noted that the surface of the bolt insertion portion 27 on the back surface 6 side should not protrude toward the back surface 6 side from the surfaces of the connection inner peripheral portion 17a and the holding wall portion 17c on the back surface 6 side (for example, the back surface of the connection inner peripheral portion 17a It may be configured to be flush with the surface on the 6 side).

Further, as shown in FIGS. 4, 5, etc., the flange 3 is provided with a rotation restricting portion 28 as a second engagement portion on the rear surface 6 side corresponding to each bolt insertion portion 27. . The rotation restricting portion 28 of the present embodiment is configured by displacing the portion of the second inner peripheral rib 16 corresponding to each bolt insertion portion 27 toward the inner side of the flange portion 3 , and the engaging portion 11 for assembly. A pair of restricting wall portions 29 are provided so as to sandwich each bolt insertion portion 27 in the circumferential direction, and a reinforcing wall portion 30 that connects the inner edge of the flange portion 3 of the restricting wall portions 29. , has a substantially U-shaped cross section. Further, the second inner circumferential rib 16 is provided continuously over the entire circumference while being deformed at the rotation restricting portion 28 .

As shown in FIGS. 6 and 7 , the body portion 2 includes a cylindrical main body portion 41 and an inner peripheral surface of the main body portion 41 extending over the entire circumferential direction of the main body portion 41 at an intermediate position in the extending direction of the main body portion 41 . A substantially annular plate-shaped partition portion 42 that protrudes inward from the main body portion 41, and a main body portion 41 that protrudes inward from the inner peripheral surface of the main body portion 41 and extends in the extending direction of the main body portion 41 through the partition portion 42. It has a first trunk-side rib 43 and a second trunk-side rib 44 extending from one end to the other end of 41 . The first trunk-side ribs 43 are formed by four sets of first trunk-side ribs 43 arranged around the main body 41, with two first trunk-side ribs 43 facing each other in the circumferential direction of the main body 41 forming one set. It is provided at four locations in the direction. The first trunk-side ribs 43 of the present embodiment are provided at equal positions around the central axis of the body portion 41 so as to correspond to the bolt insertion portions 27 of the collar portion 3 . The second trunk-side ribs 44 are appropriately provided (in this example, five rows each) in the range between each set of the first trunk-side ribs 43 .

In addition, in the present embodiment, both ends of the first trunk-side rib 43 are configured to be at the same positions as both ends of the body portion 41 in the extending direction of the body portion 41 . Furthermore, in the extending direction of the body portion 41 , one end of the second trunk side rib 44 is configured to be at the same position as the end of the body portion 41 , and the other end is located at the same position as the body portion 41 . extends to the outside (upward in FIGS. 6 and 7). Hereinafter, the part of the second trunk side rib 44 that protrudes from the other end of the main body 41 to the outside in the extending direction of the main body 41 is referred to as a "stacking protrusion 46". In addition, although the projection lengths of the first trunk-side rib 43 and the second trunk-side rib 44 from the inner peripheral surface of the main body 41 are the same, the second trunk-side rib 44 has Approximately L-shaped notch portions 45 are provided in the inner side of the main body portion 41 of both ends in the extending direction of the main body portion 41 in a rectangular shape. The notch 45 is formed in a range of the second trunk side rib 44 that is closer to the central portion of the main body 41 than the end of the main body 41 .

The end portion of the second body portion side rib 44 in the extending direction of the main body portion 41 is orthogonal to the extending direction of the main body portion 41 from the end portion of the main body portion 41 toward the inner side of the main body portion 41 . It has a retraction side portion 44a extending in the direction (to be flush with the end portion of the main body portion 41). Further, the stacking protrusion 46 provided at the end of the second trunk side rib 44 extends toward the inner side of the main body 41 from the tip of the retracting side 44a toward the outer side in the extending direction of the main body 41. and a protruding inclined side portion 46a extending at an angle to the direction orthogonal to the extending direction of the main body portion 41 from the tip portion of the protruding inclined side portion 46a to the notch portion 45 toward the inner side of the main body portion 41. and a protruding tip side portion 46b extending to the .

As shown in FIG. 9, when the trunks 2 are directly stacked (stacked) with the stacking projections 46 facing upward, the stacking projections 46 of the lower trunk 2 are aligned with the upper stacking projections 46. The body portion 41 of the upper body portion 2 is inserted into the inner side of the body portion 41 of the body portion 2, and the body portion 41 of the body portion 41 of the upper body portion 2 faces downward with respect to the end facing upward of the body portion 41 of the lower body portion 2. The protruding inclined side portion 46a of the lower trunk portion 2 and the inner peripheral surface of the main body portion 41 of the upper trunk portion 2 are opposed to each other and close to each other, or come into contact with each other. It has become. The length of the retracting side portion 44a of the stacking protrusion 46 is slightly shorter than the thickness of the body portion 41, and the projecting inclined side portion 46a of the lower body portion 2 and the main body of the upper body portion 2 are separated from each other. The main body part 41 of the upper body part 2 does not come off from the main body part 41 of the lower body part 2 even if the inner peripheral surface of the part 41 abuts thereon. In addition, in the stacking state of the trunk portion 2, the lower portion of the trunk portion 2 is not provided with the stacking protrusion 46 projecting downward from the main body portion 41, but instead is provided with the second trunk-side rib 44. The end portion is flush with the end portion of the main body portion 41 . Therefore, the body part 2 is stabilized in a state where it is installed on a flat installation surface.

In addition, as shown in FIG. 7 and the like, the partition portion 42 has a bolt through hole that penetrates the partition portion 42 at a position sandwiched between the pair of first trunk side ribs 43 and allows the bolt 4 to pass therethrough. 47 is provided. Further, on the inner side of the main body portion 41 with respect to the bolt through hole 47 , an auxiliary rib 48 protruding from the partition portion 42 in the extending direction of the main body portion 41 and an edge of the bolt through hole 47 extending from the auxiliary rib 48 are provided. A triangular guide reinforcing rib 49 is provided with an inclined leading end edge in the projecting direction from the partition portion 42 .

As shown in FIG. 10, the end portion of the body portion 41 and the flange portion 3 are engaged with each other (the relative positional relationship between the body portion 2 and the flange portion 3 is the same even in the assembled state of the drum 1). 10 is also used as a diagram showing the positional relationship between the body portion 2 and the flange portion 3 in the assembled state of the drum 1 for convenience of explanation). It is in a state of being inserted (engaged) in the engagement portion 11 for the camera. As a result, the outer peripheral surface of the end portion of the main body portion 41 and the inner peripheral surface of the first inner peripheral rib 15 face each other in the inner and outer directions (radial direction) of the main body portion 41 (flange portion 3), or As a result, the relative displacement between the trunk portion 2 and the flange portion 3 in the inside-outside direction of the main body portion 41 is restricted.

In particular, when the end portion of the main body portion 41 on which the stacking protrusion 46 is provided is engaged with the flange portion 3, the stacking protrusion 46 is positioned within the assembly engaging portion 11. , the connecting inner peripheral portion 17a, the holding wall portion 17c, and the second inner peripheral rib 16. As shown in FIG. As a result, the inner edge of the main body portion 41 of (the notch portion 45 of) the second body side rib 44 and the stacking protrusion 46 and the outer peripheral surface of the second inner peripheral rib 16 are aligned with each other. 41 facing each other in the inside-outside direction, or come close to each other, and the relative displacement between the trunk portion 2 and the collar portion 3 in the inside-outside direction of the main body portion 41 is restricted.

10 to 13, in the assembled state of the drum 1, the ends of the pair of first body side ribs 43 are inserted (engaged) in the rotation restricting portions 28 of the collar portion 3. state (the state inserted between the pair of restricting wall portions 29). As a result, the side surfaces of the first trunk-side ribs 43 extending in a direction substantially perpendicular to the circumferential direction of the body portion 41 (assembly engaging portion 11 ) are aligned with the pair of restriction walls of the rotation restriction portion 28 . It abuts or approaches the portion 29, and the rotational displacement of the trunk portion 2 along the back surface 6 of the collar portion 3 is restricted. In this embodiment, the end of the first trunk-side rib 43 engaged with the rotation restricting portion 28 as the second engaging portion corresponds to the trunk-side contact portion.

Further, in the work of assembling the drum 1, particularly in the work of engaging the end of the main body 41 on which the stacking protrusion 46 is provided with the flange 3, the first body portion side of the body portion 2 14 to 16, even if the ends of the ribs 43 and the rotation restricting portion 28 of the collar portion 3 are aligned from the beginning and the body portion 2 and the collar portion 3 are not combined. , the stacking protrusion 46 is shallowly inserted into the assembly engaging portion 11 and the first body portion side rib 43 is pushed by simply fitting the end portion of the main body portion 41 to the assembly engaging portion 11 . Among them, the end portion in the extending direction of the main body portion 41 (hereinafter referred to as "tip portion 43a") and the edge of the second inner peripheral rib 16 on the back surface 6 side are in contact with each other. As a result, the edge of the stacking projection 46 on the inner side of the main body 41 and the outer peripheral surface of the second inner peripheral rib 16 face each other and abut or approach each other, and the main body 41 (flange) 3), the relative displacement between the body portion 41 and the flange portion 3 in the inward and outward directions is restricted. In the present embodiment, the second inner peripheral rib 16 (particularly, the edge on the back surface 6 side) that abuts on the distal end portion 43a of the first torso side rib 43 as the torso side abutting portion It corresponds to the abutting part.

As described above, in the process of assembling the drum 1, the end of the main body 41 (in the extending direction of the main body 41) and the assembly engaging portion 11 face each other. A state in which the first trunk-side rib 43 and the rotation restricting portion 28 are not opposed to each other (hereinafter referred to as "assembly preparation state"), instead of the engagement state between the end portion and the assembly engaging portion 11. , the tip portion 43a of the first trunk-side rib 43 abuts the edge of the second inner circumferential rib 16 on the back surface 6 side, so that the stacking protrusion 46 is shallowly attached to the assembly engaging portion 11. Although it is inserted, it is positioned closer to the central portion in the extending direction of the body portion 41 than the bolt insertion portion 27 (connection portion 17), and the stacking protrusion 46 and the bolt insertion portion 27 (connection portion 17) contact is avoided. As a result, the trunk portion 2 is allowed to rotate along the rear surface 6 of the flange portion 3 while maintaining the state in which the end portion of the body portion 41 and the assembly engagement portion 11 face each other. Rotational displacement is guided until the positions of the first trunk side rib 43 and the rotation restricting portion 28 match. Since the second trunk side rib 44 is provided with the notch 45, it does not come into contact with the edge of the second inner peripheral rib 16 on the back surface 6 side in the assembly preparation state. In addition, in this embodiment, the stacking projection 46 (torso-side guide portion) that can be slidably contacted with the second inner circumferential rib 16 when the trunk 2 is rotated and displaced in the assembly preparation state, and the second inner circumferential rib 16 ( The guide portion is configured by the flange side guide portion).

Then, as shown in FIGS. 10, 12, 13, etc., the position of the first body side rib 43 and the rotation restricting portion 28 are brought into alignment from the assembly preparation state. The abutting state between the tip portion 43 a of the body portion side rib 43 and the edge of the second inner circumferential rib 16 on the back surface 6 side is released, and the end portion of the body portion 41 is engaged with the assembly engaging portion 11 . , the portion including the tip portion 43a of the first trunk side rib 43 is engaged with the rotation restricting portion 28. As shown in FIG. Further, the end portion of the body portion 41 and the retreating side portion 44a of the second trunk side rib 44 are in contact with the connection outer peripheral portion 17b of the connection portion 17 of the assembly engaging portion 11, and the second trunk portion side rib The edge of the second inner peripheral rib 16 on the back surface 6 side is inserted into the notch 45 of 44, and the edge of the second inner peripheral rib 16 on the back surface 6 side is inserted into the second body side rib. It abuts on a portion of 44 corresponding to the notch 45 . In this embodiment, when the body portion 2 is rotated and displaced in the assembly preparation state, the assembly engagement portion 11, particularly the connection inner peripheral portion 17a, which allows the relative displacement of the stacking protrusion 46 with respect to the flange portion 3, A region of the holding wall portion 17c on the side of the back surface 6 constitutes an allowance portion. Further, when the drum 1 is in an assembled state, there is no particular restriction on the portion where the body 2 and the flange 3 abut in the extending direction of the body 2, but the assembled state is stabilized. Therefore, at least one of the end portion of the main body portion 41 and the end portion of the second trunk side rib 44 is aligned with the flange portion 3 (the connecting portion 17 and the second inner peripheral rib) in the extending direction of the trunk portion 2. 16). In addition, for example, the stacking protrusion 46 (the protruding inclined side portion 46a and the protruding tip side portion 46b) may contact the connecting portion 17, and when the drum 1 is in the assembled state, the second Either one or both of the connecting inner peripheral portion 17a and the edge of the second inner peripheral rib 16 on the side of the back surface 6 may be configured so as not to abut on the trunk portion side rib 44. The front end portion 43a of the portion-side rib 43 may be configured to contact the peripheral portion of the bolt insertion portion 27. As shown in FIG.

Further, as shown in FIGS. 10 to 12, the portion including the distal end portion 43a of the first barrel-side rib 43 is engaged with the rotation restricting portion 28, so that the bolt insertion portion 27 of the collar portion 3 and the pair of bolt insertion portions 27 are engaged. and the area between the first trunk side ribs 43 are in communication with each other. The trunk portion 2 is basically centered on an imaginary straight line that passes through the central portion in the extending direction of the main body portion 41 and the central portion in the radial direction and is perpendicular to the extending direction of the main body portion 41. It has a rotationally symmetrical shape (only the stacking projection 46 is different), and the flange 3 is engaged with the end of the body 2 on the side where the stacking projection 46 is not provided. can do.

After the flanges 3 are engaged with both ends of the body 2, the bolt 4 is passed from the bolt insertion portion 27 of one flange 3 through the bolt through hole 47 of the body 2 to the other flange 3. , and the nut 5 is tightened to the end of the bolt 4 projecting to the surface 7 side of the flange 3 on the other side. As described above, as shown in FIG. 1, the body portion 2 and the pair of flange portions 3 are connected, and the drum 1 is assembled.

As described in detail above, according to this embodiment, when assembling the drum 1, the end of the main body 41 on the side where the stacking projection 46 is provided is engaged with the flange 3. Therefore, the end portion of the main body portion 41 can be adjusted without trying to combine the body portion 2 and the collar portion 3 so that the positions of the first body portion side rib 43 and the rotation restricting portion 28 are aligned from the beginning. is fitted to the assembly engaging portion 11, the tip portion 43a of the first trunk side rib 43 and the edge of the second inner circumferential rib 16 on the back surface 6 side abut, and the end portion of the main body portion 41 Then, while maintaining the state in which the engaging portion for assembly 11 is opposed, an assembly preparation state in which the rotational displacement of the trunk portion 2 along the back surface 6 of the collar portion 3 is allowed can be established. Further, in the assembly preparation state, the rotational displacement of the trunk portion 2 along the back surface 6 of the collar portion 3 is guided until the positions of the first trunk portion side rib 43 and the rotation restricting portion 28 are aligned. . Therefore, it is possible to improve the assembling workability of the drum 1 and the like.

Further, the distal end portion 43a of the first trunk-side rib 43 is provided at the same position as the end portion of the main body portion 41 in the extending direction of the main body portion 41, and the end portion of the first trunk-side rib 43 is located at the main body portion. It is configured so that it does not protrude from the end of the portion 41 to the outside in the extending direction of the main body portion 41 . As a result, the strength and rigidity of the tip 43a of the first trunk-side rib 43 can be easily ensured, and the tip 43a of the first trunk-side rib 43 can be caught in a predetermined portion, causing damage to the first trunk-side rib 43. It is possible to suppress the situation such as Therefore, it is possible to prevent the first body side rib 43 from being damaged or deformed when the drum 1 is assembled. By engaging with the portion 28, the function of restricting the rotational displacement of the body portion 2 along the back surface 6 of the collar portion 3 can be exhibited more reliably. As a result, the assembled state of the drum 1 can be stabilized and the durability can be improved.

Furthermore, the second inner circumferential rib 16 that abuts on the distal end portion 43a of the first trunk side rib 43 in the assembly preparation state is provided in an annular shape. Therefore, in the assembly preparation state, the relative rotational displacement of the body portion 2 with respect to the collar portion 3 can be made smooth. In addition, in the assembly preparation state, the edge portion of the stacking protrusion 46 on the inner side of the main body portion 41 contacts or approaches the outer peripheral surface of the annular second inner peripheral rib 16, so that the main body Since the relative displacement between the body portion 2 and the collar portion 3 in the inward and outward directions of the portion 41 is restricted, the operational effect of smoothing the rotational displacement of the body portion 2 in the assembly preparation state is further achieved.

In addition, since the second inner peripheral rib 16 is provided continuously over the entire circumference, for example, compared to a shape in which the second inner peripheral rib 16 is partially missing, the second inner peripheral rib 16 is Strength and stiffness can be increased. In addition, the first body-side rib 43 and the second inner peripheral rib 16 are configured to be in contact with each other in both the assembled state and the assembly preparation state of the drum 1. , the contact portion (the direction of contact) between the first trunk side rib 43 and the second inner circumferential rib 16 is different between the state of preparation for assembly and the state of preparation for assembly. That is, in the assembly preparation state, the tip portion 43a of the first trunk-side rib 43 and the edge of the second inner peripheral rib 16 on the back surface 6 side are in contact with each other, and in the assembled state, the first trunk-side rib 43 is in contact with the rear surface 6 side edge. The side surface and the restricting wall portion 29 of the rotation restricting portion 28 provided on the second inner circumferential rib 16 are in contact with each other. Therefore, it is possible to prevent a situation in which the contact (sliding contact) between the first trunk side rib 43 and the second inner peripheral rib 16 in the assembly preparation state affects the assembled state after the assembly state. be able to.

The stacking protrusion 46 that contributes to the stacking of the trunks 2 protrudes from the end of the main body 41 to the outside in the direction in which the main body 41 extends. 46 is shallowly inserted into the assembly engagement portion 11 to allow displacement of the stacking protrusion 46 accompanying the rotational displacement of the body portion 2 along the back surface 6 of the collar portion 3. The projecting portion 46 is inserted (substantially fitted) into a region surrounded by the connecting inner peripheral portion 17 a of the assembly engaging portion 11 , the holding wall portion 17 c and the second inner peripheral rib 16 . Therefore, it is possible to prevent the stacking protrusion 46 for stably stacking the drums 2 from becoming a hindrance to the assembly work of the drum 1 . Furthermore, as described above, the stacking protrusion 46 of the present embodiment contacts or is close to the outer peripheral surface of the second inner peripheral rib 16 in the assembly preparation state, and the body portion 41 in the inward and outward directions of the body portion 41 It also has the function of preventing relative displacement between the portion 2 and the collar portion 3 . For this reason, even with a configuration including the stacking protrusion 46, while suppressing complication of the configuration of the body portion 2, the distance between the body portion 2 and the flange portion 3 in the inner and outer directions of the main body portion 41 in the assembly preparation state is reduced. relative displacement can be prevented.

In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not exemplified below are naturally possible.

(a) In the above embodiment, for example, in the extending direction of the main body 41, the end of the second trunk-side rib 44 on the side where the stacking protrusion 46 is not provided, and the first trunk-side rib 43 is positioned closer to the central portion of the body portion 41 than the end portion of the body portion 41, and the tip portion 43a of the first body-side rib 43 and the second inner peripheral rib 16 of the collar portion 3 are aligned. In the assembly preparation state in which the edge on the back surface 6 side is in contact, the end portion of the main body portion 41 is shallowly inserted into the assembly engaging portion 11, and the outer peripheral surface of the end portion of the main body portion 41 and the It may be configured so that the inner peripheral surface of the first inner peripheral rib 15 faces and abuts or approaches. In this case, even in the assembly preparation state in which the end portion of the body portion 41 on the side where the stacking protrusion 46 is not provided is engaged with the flange portion 3, the trunk portion 2 in the inside and outside direction of the body portion 41 is and the flange portion 3 can be prevented from being displaced relative to each other, and the assembly workability can be further improved. When adopting this configuration, in the extending direction of the body portion 41, the end portion of the second body portion side rib 44 (when the notch portion 45 is formed) is the end portion of the body portion 41. , or may be positioned closer to the central portion of the body portion 41 than the end portion of the body portion 41 .

Furthermore, it is possible to omit the stacking protrusion 46 . When adopting such a configuration, both ends of the first trunk side rib 43 are positioned closer to the central portion of the body portion 41 than both ends of the body portion 41 in the extending direction of the body portion 41. Regarding both end portions of the main body portion 41, the outer peripheral surface of the main body portion 41 and the inner peripheral surface of the first inner peripheral rib 15 may face and abut or come close to each other in the assembly preparation state. . Even when such a configuration is employed, the first trunk-side rib 43 does not protrude outside in the extending direction of the main body 41, so that the first trunk-side rib 43 can be protected. With the stacking projection 46 left, the tip 43a of the first trunk side rib 43 is located at the end of the main body 41 on the side where the stacking projection 46 is provided. It may be positioned closer to the central portion in the extending direction of the main body portion 41 than the portion.

(b) In the above-described embodiment, the trunk portion 2 (main body portion 41) is configured in a substantially cylindrical shape, but it may be formed in a shape having corners such as a substantially square cylindrical shape. Furthermore, in the above-described embodiment, the first trunk-side rib 43 and the second trunk-side rib 44 are provided so as to extend over the entire extending direction of the trunk 2 (main body portion 41). However, it is sufficient if they are provided at least at both ends of the body portion 41 or in the vicinity thereof. In addition, in the above-described embodiment, the body portions 2 are configured to be stackable, but may be configured not to be stackable. The length and thickness of the trunk portion 2 (body portion 41) can also be changed as appropriate. is the direction in which the inner space penetrates.

(c) In the above embodiment, the second inner peripheral rib 16 is provided continuously in an annular shape, but has a shape that is partially missing (or is scattered on an imaginary circular line). shape). However, by forming it into an annular shape, it is possible to improve assembly workability, etc., and by providing it continuously over the entire circumference of the annular shape, it is possible to improve durability, etc. Further, the second inner peripheral rib 16 abuts against the tip end portion 43a of the first trunk side rib 43 in the assembly preparation state to maintain the state in which the stacking protrusion 46 is shallowly inserted into the assembly engaging portion 11. , The assembly engaging portion 11 is not limited to being a component of the assembly engaging portion 11, and the assembly engaging portion 11 and the second inner peripheral rib 16 are provided at different positions in the inner and outer directions of the body portion 2. may be

Moreover, the flange 3 is configured in a substantially disc shape, but it is provided with an assembly engaging portion 11 and can be connected to the body 2, so that the long object wound around the body 2 can be grounded (as much as possible). It is sufficient that the drum 1 can be supported without being bent. For example, it may have a shape having corners such as a substantially rectangular cylindrical shape. Incidentally, it is also possible to omit the concave portion 12 and the stacking engagement portion 13 so that stacking between the flange portions 3 is impossible.

(d) In the above embodiment, the body portion 2 and the collar portion 3 are made of polypropylene, but they may be made of other resin materials such as polyethylene, PET, and polyamide. Also, the long object wound around the drum 1 and stored is not particularly limited, and any object that can be wound around the body 2 may be used.

DESCRIPTION OF SYMBOLS 1... Drum, 2... Body part, 3... Collar part, 6... Back surface, 7... Front surface, 11... Engagement part for assembly, 15... First inner peripheral rib, 16... Second inner peripheral rib, 17... Connecting part , 17a... Connection inner peripheral part 17b... Connection outer peripheral part 17c... Holding wall part 28... Rotation control part 29... Control wall part 30... Reinforcing wall part 41... Main body part 43... First body part Side ribs, 43a... Tip part, 44... Second trunk side rib, 46... Projection for stacking.

Claims (3)

A trunk around which a long object is wound, and flanges provided at both ends of the trunk and protruding outward from the outer peripheral surface of the trunk, wherein the trunk and the flange is configured as a separate body, and a drum formed by assembling the body and a pair of the flanges,
The trunk portion includes a substantially cylindrical main body portion and trunk-side abutting portions provided at least at both ends of the main body portion or in the vicinity thereof and protruding inward from the inner surface of the main body portion. ,
On the back surface of the collar portion facing the body portion,
a first engaging portion that engages with an end portion of the body portion in the assembled state of the drum;
a second engaging portion that engages with the body portion side contact portion in the assembled state of the drum;
In the engaged state between the end portion of the main body portion and the first engaging portion, relative displacement between the body portion and the flange portion in the inward and outward directions of the main body portion is restricted,
In the engaged state between the body side contact portion and the second engaging portion, rotational displacement of the body portion along the back surface of the collar portion is restricted,
In the process of assembling the drum, the end of the body portion and the first engagement portion face each other, and the end portion of the body portion engages with the first engagement portion. In an assembly preparation state in which the trunk-side abutment portion and the second engaging portion are not opposed to each other, the distal end portion of the trunk-side abutment portion in the extending direction of the main body portion a flange-side abutting portion that abuts;
In the assembly preparation state, the body portion is rotated along the back surface of the collar portion while maintaining the contact state between the front end portion of the body portion side contact portion and the collar portion side contact portion. A guide portion that can be guided until positions of the body portion side contact portion and the second engaging portion are aligned by dynamically displacing the body portion side contact portion,
From the assembly preparation state, the positions of the trunk-side abutment portion and the second engaging portion are brought into a state of matching, so that the distal end portion of the trunk-side abutment portion and the collar portion are aligned. A state in which the contact state with the side contact portion is released, the end portion of the body portion engages with the first engaging portion, and the body portion side contact portion engages with the second engaging portion and
The distal end portion of the trunk-side contact portion is located at the same position as the end portion of the main body portion in the extending direction of the main body portion, or at the center of the extending direction of the main body portion relative to the end portion of the main body portion. located on the side of the
The body portion has a stacking protrusion that protrudes inward from the inner surface of the main body portion and protrudes from one end of the main body portion to the outside in the extending direction of the main body portion,
When the trunk portions are stacked with the stacking projection projecting upward, the stacking projection of the lower trunk portion is inserted inside the upper trunk portion,
In the assembly preparation state, the collar part is configured to rotate the body part along the back surface of the collar part while bringing the body-side contact part into contact with the collar-side contact part. (2) a drum , further comprising a permissive portion that permits relative displacement of the stacking protrusion with respect to the flange portion ; 2. The drum according to claim 1, wherein the flange-side contact portion is provided in an annular shape. The flange-side contact portion is configured in an annular shape and is continuously provided along the entire circumference,
The second engaging portion is configured by partially displacing the flange-side contact portion inwardly of the flange-side contact portion,
In the assembly preparation state, the front end portion of the trunk side contact portion contacts the back side edge of the collar portion side contact portion,
In the assembled state, a side surface of the trunk side contact portion extending in a direction intersecting the circumferential direction of the main body portion is positioned at the second engaging portion of the collar portion side contact portion. 3. The drum according to claim 1, wherein the side surface of the flange-side contact portion that extends in a direction intersecting the circumferential direction is in contact with or is close to the side surface.

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