JP2020152466A - Braking structure of reel for long body - Google Patents

Abstract

To provide a load-bearing structure of a reel for a long body which can perform effective braking with a simple structure.SOLUTION: In a reel for long body comprising a drum 31 to which a fixed-end 22 of a long body 21 is fixed and which rotates, braking is performed by use of change in a shape of the long body wound on the drum 31. A brake part 13 is located on a radial outer side of the drum 31. When the long body 21 is wound on the drum 31, the later wound long body 21 is wound so as to overlap a radial outer side of the earlier wound long body 21, and thus, the later wound long body 21 contacts the brake part 13, thereby braking rotation of the drum 31.SELECTED DRAWING: Figure 1

Description

The present invention relates to a braking structure for a long reel.

As the braking structure of the conventional long reel, those shown in Patent Documents 1 and 2 are known.
In the braking structure of Patent Document 1, a centrifugal brake is provided on the drum, and the brake shoe abuts on the drum due to the centrifugal force that increases as the rotation speed of the drum increases, and the rotation of the drum is braked. is there.
The braking structure of Patent Document 2 is formed by fastening a long sliding friction member, a brake rotating body in which the middle of the long sliding friction member is wound around an outer peripheral surface, and the other end of the long sliding friction member. A tightening control member that controls tightening of the dynamic friction member to the brake rotating body and a rotating damper are provided, and a force is generated in which the shaft of the rotating damper and the damper body rotate together in response to an input from a member on the external input side. The tightening control member is rotated in response to this force to control the tightening of the long sliding friction member with respect to the brake rotating body.
As described above, the conventional braking structure requires many members or has to take a complicated structure. In particular, no proposal has been made based on the idea of braking the rotation of the drum by utilizing the change in the shape of the long body wound around the drum.

Japanese Unexamined Patent Publication No. 8-268649 JP-A-2009-144456

An object to be solved by the present invention is to provide a braking structure for a long reel that can perform effective braking with a simple structure.

The present invention is a long body wound around a drum in a long body reel including a long body and a drum for winding the long body by fixing and rotating a fixed end of the long body. We propose a structure that enables effective braking with a simple structure by utilizing the change in the form of.
In the present invention, the brake portion is arranged on the outer side in the radial direction of the drum, and when the pulled-out long body is wound on the drum, the long body wound later is first. The drum is configured to brake the rotation of the drum by being wound so as to overlap the outer side of the wound long body in the radial direction and the later wound long body coming into contact with the brake portion. It proposes a braking structure.
In carrying out the present invention, by encouraging the elongated body wound around the drum to move in the axial direction of the drum, the elongated body is clogged between the drum and the brake portion. It is desirable to have a clogging suppressing structure for suppressing.
More specifically, as the clogging suppressing structure, by providing a tapered portion on the outer peripheral surface of the drum, the long body wound around the drum is easily moved in the axial direction of the drum. Can be done.
The brake portion can be arranged outside the drum, but by forming the inner wall surface of the casing for accommodating the drum, the brake portion can be braked without preparing a separate component for the brake portion. It is possible to provide a reel for a long body having a casing structure.

The present invention provides a braking structure for a reel for a long body by a new idea of utilizing a change in the shape of a long body wound around a drum, whereby effective braking with a simple structure is provided. Can be done.

A reel for a long body according to an embodiment of the present invention is shown, (A) is a plan view, and (B) is an enlarged left side view of a main part. (A), (B), and (C) show examples of modification of the long reel according to the embodiment of the present invention, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Overview)
The reel for a long body according to this embodiment includes a support such as a casing 11 and a drum 31 that is supported by the casing 11 and rotates, and the long body 21 having flexibility is wound up by the drum 31. It can be fed out. Various uses such as a cord reel, a hose reel, and a cable reel can be exemplified, but in this embodiment, it is implemented as a wire reel. More specifically, it is a wire reel for crime prevention, in which an engaging portion (not shown) is provided at the tip of the long body 21, and the long body 21 is looped into an engaging hole of a lock (not shown). It is implemented as a wire reel for crime prevention that can be locked by inserting it into the.

If the long body 21 wound around the drum 31 is flexible enough to be wound around the drum 31, the power cord, communication cord, hose, cable, etc. can be changed according to the application. Although it can be carried out, a wire is adopted in this embodiment. More specifically, a metal wire is used as a core material 21b, and a coated wire whose outer circumference is coated with a flexible synthetic resin tube constitutes a long body main body 21a. The drum 31 is rotatably supported by the casing 11 around the central axis 32, and the drive source 33 for rotation can be appropriately selected and implemented such as electric, manual, or semi-manual.

In this embodiment, the long body 21 is pulled out by hand so that the drum 31 is automatically rotated by the action of the drive source 33 only when the long body 21 is wound around the drum 31. As an example of the drive source 33, the use of the mainspring can be raised. Although not shown, the specific structure is such that the inner peripheral end of the mainspring is fixed to the central shaft 32 on the drum 31 side while the outer peripheral end is fixed to the casing 11, or conversely, the mainspring spring. An example can be exemplified of a structure in which the outer peripheral end is fixed to the drum 31 while the inner peripheral end thereof is fixed to the casing 11. Further, as an action of the mainspring, energy is stored by winding the mainspring when the drum 31 rotates in the direction in which the long body 21 is pulled out, and energy is stored when the long body 21 is rewound. When the mainspring is released by the energy generated, or on the contrary, when the drum 31 rotates in the direction in which the long body 21 is pulled out, the winding of the mainspring is released to store energy and lengthen. When the scale 21 is rewound, the stored energy can be used to wind the mainspring.

The support may be a casing 11 that can rotatably hold the drum 31, for example, a casing 11 that covers almost the entire drum 31, and is a frame that holds the drum 31 in an exposed state. It may be a part of the structure.

(Brake structure)
In the reel for a long body according to this embodiment, in order to prevent the long body 21 from being wound up rapidly, a braking structure for controlling the winding speed and ensuring safety is provided. It is provided.

In this braking structure, the brake portion 13 is arranged on the outside of the drum 31. The brake portion 13 is a separate body from the rotating drum 31, and in this embodiment, the brake portion 13 is fixed to a support such as a casing 11 or other members. Then, when the long body 21 is wound around the drum 31, the long body 21 wound later overlaps the outer peripheral side of the long body 21 wound earlier and comes into contact with the brake portion 13. The structure is such that the rotation of the drum 31 is braked by the frictional resistance.
Specifically, the position where the long body 21 is wound around the drum 31 once does not come into contact with the long body 21, but when the long body 21 is wound over two turns, it comes into contact with the long body 21. Is provided with a brake portion 13. More specifically, the distance between the surface of the wound portion of the drum 31 and the brake portion 13 is made larger than the outer diameter a of the main body of the long body 21 and smaller than twice the outer diameter a of the main body.
However, when the number of turns of the long body 21 around the drum 31 is set to be large, the long body 21 does not come into contact with the long body 21 when it is wound two times, but it is long when it is wound three times. The number of overlapping turns and the position of the stopper 23 can be variously changed, such as providing a brake portion 13 at a position where the body 21 comes into contact with the body 21.

(Clog control structure)
Since it is necessary for the drum 31 to be wound around the long body 21 by a predetermined length, it is appropriate that the long body 21 is wound side by side without overlapping the drum 31. It is desirable to make it act on. If the long body 21 overlaps and is wound only at the position where the brake portion 13 is located before the long body 21 overlaps the drum 31 and is wound well, the brake is applied unnecessarily quickly or the long body is wound. There is a risk that the drum 31 will not rotate because the 21 is clogged between the drum 31 and the brake portion 13.
In order to suppress the occurrence of such a situation, in this embodiment, a clogging suppressing structure that encourages the long body 21 wound around the drum 31 to move in the axial direction of the drum 31 is adopted.

Specifically, the tapered portion 35 is provided on the outer peripheral surface of the drum 31. Here, the tapered portion 35 refers to a portion where the outer diameter of the drum 31 gradually changes. In the positional relationship with the insertion opening 42 for pulling out the long body 21 from the casing 11, the tapered portion 35 gradually reduces the outer diameter of the drum 31 in the axial direction of the central axis 32 as the distance from the insertion opening 42 increases. It is desirable that the tapered portion 35 becomes. This encourages the elongated body 21 wound up from the insertion opening 42 to move in the axial direction of the central axis 32 to a portion of the drum 31 having a smaller outer diameter.

The tapered portion 35 may be provided over the entire axial direction of the drum 31, but may be provided on a part of the tapered portion 35. For example, as shown in FIG. 2 (A), a cylindrical portion 36 having no taper may be formed for 2 to 3 turns in the axial direction of the drum 31 from the immediate vicinity of the insertion opening 42, or from the outlet as shown in FIG. 2 (B). The position and range where the tapered portion 35 is provided is the drive source 33 such as a spring or the like, such as the cylindrical portion 36 for the farthest few turns or the tapered portion 35 only at the center as shown in FIG. 2 (C). It can be changed in consideration of the strength of the torque, the diameter of the long body 21, the elasticity, and the axial slipperiness of the wound long body 21 such as the coefficient of friction of the surface. ..
The angle of the tapered portion 35 is preferably about 10 to 45 degrees, more preferably about 30 degrees, but this is also changed in consideration of the hardness, surface friction coefficient, slipperiness, etc. depending on the material. Can be carried out.

The brake portion 13 may be formed by the inner wall surface of the casing 11, or may be provided separately from the inner wall surface. Further, the circumferential range in which the brake portion 13 is provided can be changed depending on the degree to which the brake is applied and the strength of the torque generated by the drive source 33 such as the mainspring, and may be the entire circumference or half the circumference. It may be a region of less than 90 degrees, or it may be divided into a plurality of locations. Similarly, the axial range in which the brake portion 13 is provided is a range in which it comes into contact with one long body 21, extends over the entire axial length of the drum 31, the degree to which a brake is applied, a mainspring, etc. It can be changed depending on the strength of the torque generated by the drive source 33.

(Load-bearing structure)
In the long body reel according to this embodiment, when the long body 21 is pulled out to the end, it is resistant to protect the fixed structure between the fixed end 22 of the long body 21 and the fixed portion 34 of the drum 31. A load structure is adopted. This load-bearing structure prevents the long body 21 from coming off the drum 31 when the long body 21 is pulled by a strong force, or prevents the fixed portion of the long body 21 and the drum 31 from being damaged. , Or, in a cord reel or the like, it can be adopted for various purposes such as preventing disconnection inside the cord.

In this load-bearing structure, a load receiving portion 41 having an insertion opening 42 through which the long body 21 is passed is provided at an outlet for pulling out the long body 21 from the casing 11. The load receiving portion 41 may be fixed to an object separate from the casing 11 as long as it can support the load, or may be provided on the outside of the drawer port. , It may be provided inside the casing 11 between the drawer port and the drum 31.

A stopper 23 is fixed in the vicinity of the fixed end 22 of the elongated body 21. The stopper 23 has a stopper outer diameter b larger than the main body outer diameter a of the long body 21.
The insertion opening 42 includes a small opening 43. The small opening inner diameter c of the small opening 43 is larger than the main body outer diameter a of the long body 21 and smaller than the stopper outer diameter b. Therefore, the long body 21 can be freely moved in the longitudinal direction into the insertion opening 42 and can be freely pulled out or wound up. However, when the long body 21 is pulled out to near the fixed end 22, the fixed end 22 is formed. The stopper 23 abuts on the edge 44 of the small opening 43 and the load is received between the edge 44 of the small opening and the stopper 23 before the tensile load is applied to the long body 21. Avoid being pulled out.
The distance between the fixed end 22 and the stopper 23 is set to the small opening 43 so that no force is applied to the fixed end 22 when the stopper 23 is in contact with the edge 44 of the small opening. It is appropriate to make it longer than the distance to the fixed portion 34.

(Large opening)
In this embodiment, in order to improve the workability of assembly, the insertion opening 42 is provided with a large opening 45 connected to the small opening 43. The large opening 45 has a large opening inner diameter d larger than the main body outer diameter a and the stopper outer diameter b. As a result, when assembling, the long body 21 and the stopper 23 can be passed through the large opening 45. In particular, when a large load is received at the insertion opening 42, it is advantageous to have a structure without joints such as a single sheet metal, but even in that case, the long body 21 and the stopper from the large opening 45 It is advantageous in that the efficiency of assembly can be improved by allowing the 23 to pass through.

It is desirable that the long body 21 is not located in the large opening 45 when the long body 21 is pulled out (particularly when it is pulled out near the fixed end 22). As a specific example, a structure can be shown in which the small opening 43 is brought closer to the fixed portion 34 of the drum 31 than the large opening 45 in the axial direction of the central axis 32. Specifically, the structure is such that the fixing portion 34 of the drum 31 is provided near one end of the drum 31 in the axial direction (arrow t1), and the insertion opening 42 is arranged near the other end of the drum 31 in the axial direction (arrow t2). .. Then, the small opening 43 is arranged closer to one end (arrow t1) in the axial direction of the drum 31 than the large opening 45. As another structure, a structure in which the large opening 45 is closed by a bushing or a closing plate can be shown.

In the above description, the expressions of large diameter and small diameter are used, but these are not necessarily intended to be applied to those of a perfect circle, and whether one has a shape or size that allows the other to pass through. It should be understood that the shape may be elliptical, polygonal, or amorphous.

11 Casing 13 Brake part 21 Long body 21a Long body body 21b Core material 22 Fixed end 23 Stopper 31 Drum 32 Central shaft 33 Drive source 34 Fixed part 35 Tapered part 36 Cylindrical part 41 Load receiving part 42 Insertion opening 43 Small opening 44 Edge 45 Large opening a Main body outer diameter b Stopper outer diameter c Small opening inner diameter d Large opening inner diameter

Claims (4)

In a reel for a long body including a long body and a drum for winding the long body by fixing and rotating a fixed end of the long body.
A brake portion is arranged on the outer side of the drum in the radial direction.
When the pulled-out long body is wound around the drum, the later wound long body is wound so as to overlap the outer side in the radial direction of the previously wound long body, so that the long body is wound later. A braking structure for a reel for a long body, characterized in that the rotation of the drum is braked when the long body is brought into contact with the brake portion. It is provided with a clogging suppressing structure that suppresses clogging between the drum and the brake portion by encouraging the long body wound around the drum to move in the axial direction of the drum. The braking structure for a long body reel according to claim 1, wherein the drum is characterized in that. The braking structure for a long reel according to claim 2, wherein the clogging suppressing structure is a tapered portion provided on an outer peripheral surface of the drum. The braking structure for a long reel according to any one of claims 1 to 3, wherein the braking portion is formed of an inner wall surface of a casing for accommodating the drum.