JP4992875B2 - Cylindrical holder - Google Patents

Description

  The present invention relates to a jig used to hold a cylindrical object such as a take-up spool on a rotating shaft of a driving device such as a motor.

  Conventionally, when a cylindrical object such as a spool for winding an ultrafine wire such as a gold wire is fixed to a rotating shaft such as a motor, the outer shape of the cylindrical object holder provided on the rotating shaft is smaller than the inner diameter of the cylindrical object. This was done by attaching two pairs of plungers to this rotating object at intervals of 120 degrees. Since a cylindrical object such as a spool is usually used at a high speed, it is important that its weight balance is good.

However, since the inner diameters of spools and the like actually vary, it is necessary to adjust the balance with a plunger in order to maintain a good weight balance.
However, this balance adjustment is difficult because the variation of the inner diameter varies from spool to spool, and the inner wall of the spool may be damaged when it is attached to or detached from a rotating shaft such as a motor.

Therefore, a holder as shown in FIG. The holder is installed in the holder at intervals of 120 degrees by moving the tapered pipe 19 left and right along the central axis, and two sets of three pieces fitted into the guide 20 of the two round holes at both ends. The lower end of the shaft 21 is pushed, the shaft is moved in the circumferential direction of the spool, and the cylindrical object such as the spool is fixed without causing eccentricity.
Japanese Patent Laid-Open No. 10-9219

  However, this method has a limit in the angle of inclination when the tapered pipe pushes the shaft 21, the spring force does not act effectively, the holding force is weak, and a moment is generated in the shaft 21. When used for a period of time, the shaft 21 and the guide 20 are worn and a gap between the shaft and the guide is widened, causing problems such as malfunction.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to easily attach it to a rotating shaft such as a motor without causing eccentricity even if it is a cylindrical object such as a spool having a variation in inner diameter. It is possible to provide a cylindrical object holder such as a spool which has a large holding force and does not cause abnormal operation even when used for a long period of time.

In order to achieve the above object, the cylindrical object holder of the present invention is provided in two pairs of three at a 120 degree interval in order to hold a cylindrical object such as a take-up spool of an ultrafine wire such as a gold wire. A lever having the same length, a guide hole for holding a side surface of the upper end of the lever, a pin bar serving as a fulcrum for rotating the lever, and a lever inserted into the pin hole of the guide bar A pin that serves as a fulcrum, a groove that engages with the lower end of the lever to operate the lever, and is arranged in a straight line in the sliding direction, and the two cylindrical sliders are respectively viewed from one side. Two independent springs to be pressed, a cylindrical guide for guiding the cylindrical slider and a side surface of the lower end of the lever, and a pusher for pressing the two cylindrical sliders in a direction to be compressed with respect to the springs respectively in contact with each other When the pusher is unlocked, the two cylindrical sliders are pushed out by the force of the spring, and the lever is rotated by the groove of the two cylindrical sliders. by provoking, in which the distal end of said lever is configured so that pressed against the inner wall surface of the cylindrical object, such as a spool protruding from said guide bar.

  Further, in addition to the above, the cylindrical object holder of the present invention is such that the two cylindrical sliders are in contact with each other in the sliding direction, and the two pushers push the cylindrical slider in contact with the pusher with the pusher. The cylindrical slider is moved at the same distance simultaneously to operate the lever.

  If the cylindrical object holder of the present invention is used, a cylindrical object such as a spool can be fixed to a rotating shaft such as a motor without causing any eccentricity regardless of the inner diameter. In addition, the holding force of the holder of the present invention with respect to the cylindrical object is sufficient, and a smooth operation is possible even after long-term use. Furthermore, when the cylindrical object and the cylindrical object holder of the present invention are attached and detached, the inner wall surface of the cylindrical object is not damaged.

Hereinafter, the present invention will be described in detail with reference to FIGS.
FIG. 1 is a front view showing a configuration of a cylindrical holder such as a spool according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. However, the lower half of FIG. 2 is shown by rotating the lower half of FIG. 1 by 60 degrees. In the cylindrical object holder 1 of the present invention, the lever 3a and the lever 3b having the same shape for holding the cylindrical object 2 such as a spool are provided as a set of three at a 120 degree interval. If each of the three sets is a pair, two pairs are provided.
The levers 3 a and 3 b are held at the tip side by three guide bars 6 in which guide holes 4 and pin holes 5 are formed, and are rotatably held by pins 7 fixed to the guide bars 6. The side surface on the lower end side is guided by a long hole 9 processed in the outer periphery of the cylindrical guide 8.

  Inside the cylindrical guide 8, two cylindrical sliders 11a and 11b formed with grooves 10a and 10b for engaging the lower ends of the levers 3a and 3b and operating the levers 3a and 3b are slidably accommodated. . And the end surface of the cylindrical slider 11a and the end surface of the cylindrical slider 11b contact | abut. In addition, two springs 12 a and 12 b for pressing these two cylindrical sliders 11 a and 11 b from one side are provided inside the cylindrical guide 8. Further, a shaft 14 of a cylindrical slider 11a is fixed to the pusher 13. By pressing the pusher 13, a direction against the elastic force of the springs 12a and 12b contacting the cylindrical sliders 11a and 11b (in FIG. 2). It can be moved horizontally (to the left).

  Further, a groove 15 is formed on the outer peripheral surface of the cylindrical guide 8. By fitting a claw 16 provided on the pusher 13 into the groove 15, the positions of the cylindrical sliders 11a and 11b can be fixed. Yes. A spring 17 for fixing the claw 16 to the groove 15 of the cylindrical guide 8 is provided between the claw 16 and the pusher 13.

  Since the cylindrical object holder 1 of the present invention is configured in this way, when the claw 16 is disengaged from the groove 15 of the cylindrical guide 8, the two cylindrical sliders 11a and 11b are separated from each other by the independent springs 12a and 12b in FIG. It can be moved horizontally to the right. As a result, the lower ends of the two pairs of levers 3a and 3b, which are formed in equal shapes each having a 120-degree interval and engaged with the grooves 10a and 10b of the cylindrical sliders 11a and 11b, are pushed rightward. As a result, the levers 3 a and 3 b rotate counterclockwise, and the lever tips 3 a ′ and 3 b ′ project from the guide bar 6 so as to expand the inner diameter of the spool 2. As a result, it is possible to clamp the spool 2 having a variation in inner diameter evenly without decentering.

Further, by pushing the pusher 13 in the direction against the elastic force of the springs 12a and 12b, the tightening force of the levers 3a and 3b against the spool 2 is loosened, and the lever 3a and 3b are not brought into contact with the inner wall surface of the spool 2 Detachable.
In this structure, the levers 3a and 3b are only in contact with the grooves 10a and 10b of the cylindrical sliders 11a and 11b and the pin 7, so that wear is small and a smooth operation is performed.

3 (a) and 3 (b) are diagrams showing an outline of the cylindrical object holder 1 of the present invention shown in FIG. 2. The mechanism of the cylindrical object holder 1 of the present invention will be described in further detail with reference to FIG. Explained.
As shown in FIG. 3A, in the cylindrical object holder 1 of the present invention, when the pusher 13 is pressed, the claw 16 engages with the groove 15 of the cylindrical guide 8 and is locked. The cylindrical slider 11a is moved and fixed in the horizontal left direction in the figure. Since the cylindrical slider 11b is pressed by the cylindrical slider 11a, the cylindrical slider 11b is simultaneously moved at an equal distance and fixed.

  Further, in this state, the levers 3a and 3b are held at the side surfaces by the guide holes 4 and 9 formed in the guide bar 6 and the cylindrical guide 8, respectively, and the pin 7 attached to the guide bar 6 is used as a fulcrum. It is rotated clockwise as indicated by an arrow by grooves 10a and 10b formed in the cylindrical sliders 11a and 11b. Therefore, the diameters of the lever tips 3 a ′ and 3 b ′ formed by the three levers 3 a and 3 b are smaller than the inner diameter of the spool 2.

  After the cylindrical object holder 1 of the present invention is inserted into the spool 2 in this state, when the claw 16 of the pusher 13 is removed from the groove 15 of the cylindrical guide 8 as shown in FIG. The springs 12a and 12b are pushed out in the horizontal right direction in the figure, and the grooves 10a and 10b of the cylindrical sliders 11a and 11b rotate the levers 3a and 3b counterclockwise as indicated by arrows. When the levers 3a and 3b rotate with the pin 7 as a fulcrum, the lever tips 3a 'and 3b' rotate with the pin 7 as an axis. As a result, the lever tips 3a 'and 3b' protrude from the guide bar 6 and protrude inside the spool 2. The wall can be pressed.

  In this way, the spool 2 is strongly fixed by the lever tips 3a ′ and 3b ′ of the holder 1 regardless of the inner diameter thereof. At this time, the spool 2 is fixed to the holder 1 without being eccentric. Therefore, the weight balance is also improved. Therefore, by attaching the holder 1 to which the spool 2 is fixed in this manner to the rotating shaft 18 such as a motor, the spool 2 can be rotated in a good state. The levers 3a and 3b are formed so that the distance from the pin 7 to the lever tips 3a 'and 3b' is much shorter than the distance from the lever lower end. Inversely proportional to the size. However, the ratio of the distance from the pin 7 to the lever tip 3a ', 3b' and the distance from the pin 7 to the lower end of the lever is the force required to press the spool 2 or when the spool 2 is inserted into the holder 1. It can be appropriately selected depending on the required clearance.

  Next, when removing the spool 2 from the cylindrical object holder 1, as shown in FIG. 3A, if the pusher 13 is pushed again, the claw 16 of the pusher 13 is locked in the groove of the cylindrical guide 8, and the pipe 4a Moves in the horizontal left direction in the figure, and the lower end of the lever is rotated clockwise by the grooves 10a and 10b of the cylindrical sliders 11a and 11b, and the lever tips 3a 'and 3b' are lowered from the guide bar 6 to the inner wall surface of the spool 2. The spool 2 can be easily detached from the cylindrical object holder 1 without contacting the lever tips 3a ′ and 3b ′.

It is a front view which shows the structure of the cylindrical object holder of this invention. 2 is a cross-sectional view taken along line AA in FIG. 1 (however, the lower half is shown by rotating the lower half of FIG. 1 by 60 degrees). It is a figure for demonstrating the effect | action of the cylindrical holder of this invention, (a) is a state which the nail | pushing which pushes a pusher meshes with the groove | channel 15 of a cylindrical guide, and is locked, (b) is unlocked. It shows the state that is. It is a figure for demonstrating the structure of cylindrical object holders, such as the conventional extra fine wire winding spool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical object holder 2 Spool 3a, 3b Lever 3a ', 3b' Lever tip 4 Guide hole 5 Pin hole 6 Guide bar 7 Pin 8 Cylindrical guide 9 Guide hole 10a, 10b Groove 11a, 11b Cylindrical slider 12a, 12b Spring 13 Pusher 14 Shaft 15 Groove 16 Claw 17 Spring 18 Motor Shaft 19 Tapered Pipe 20 Round Hole Guide 21 Shaft

Claims (2)

In order to hold a cylindrical object such as a take-up spool of an ultrafine wire such as a gold wire, two pairs of levers of equal length provided in pairs of three at 120 degree intervals, and a guide hole for holding the side surface of the upper end of the lever And a guide bar formed with a pin hole serving as a fulcrum for rotating the lever, a pin inserted into the pin hole of the guide bar and serving as a fulcrum of the lever, and engaged with a lower end of the lever. Two cylindrical sliders that are linearly arranged in the sliding direction, and two independent springs that respectively press the two cylindrical sliders from one side, the cylindrical slider, and the lower end of the lever A cylindrical guide that guides the side surfaces of the two, a pusher that presses the two cylindrical sliders in a direction to be compressed against the springs that contact each other, and a claw that locks the pusher. Moni,
When the pusher is unlocked, the two cylindrical sliders are pushed out by the force of the spring, and the lever is rotated by the groove of the two cylindrical sliders so that the tip of the lever is moved from the guide bar. cylindrical target holder, characterized in that projects are configured so that pressed against the inner wall surface of the cylindrical object, such as a spool.   The two cylindrical sliders are in contact with each other in the sliding direction, and the pusher pushes the cylindrical slider that is in contact with the pusher to simultaneously move the two cylindrical sliders at the same distance. The cylindrical object holder according to claim 1, wherein the cylindrical object holder is operated.

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