JP2011246278A - Yarn stretching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently suppress the initial elongation of a yarn used as a power transmission means of a mechanism.SOLUTION: This yarn stretching device includes: a drum support 50 which supports a bobbin drum 5 on which the yarn W used as the power transmission means of the mechanism is wound so as to be rotated; a winding drum 20 which can be contracted or expanded, and winds the yarn W from the bobbin drum 5 supported by the drum support 50; and a tension applying mechanism 30 for applying tension to the yarn W by expanding the winding drum 20 after winding the yarn W.

Description

  The present invention relates to a yarn stretching device that applies tension to a yarn used as a power transmission means for tension and stretches the yarn.

  An example of a mechanism using yarn as power transmission means is shown in FIG. This mechanism is a device for reciprocating the carriage 101 between the first position P1 and the second position P2, and a first pulley 103 and a second pulley 104 are provided on both sides of the movement range of the carriage 101. Yes. And the thread | yarn W is respectively hung on the 1st pulley 103 and the 2nd pulley 104, and the both ends of the thread | yarn W are mutually connected. That is, the thread W is formed in a belt shape and is hung on the first pulley 103 and the second pulley 104. A part Wt of the yarn W is connected to the carriage 101. Thereby, for example, when the first pulley 103 and the second pulley 104 rotate counterclockwise in FIG. 5, the carriage 101 is pulled by the thread W, and the right direction (solid arrow) from the first position P1 to the second position P2. Move to see). Further, by rotating the first pulley 103 and the second pulley 104 to the right, the carriage 101 is returned to the first position P1 (see the dotted arrow).

In general, nylon thread W is used in the Karakuri in consideration of processability and safety. However, since the nylon yarn W extends in the initial stage of use, the carriage 101 is displaced due to the elongation of the yarn W. For this reason, when updating the yarn W, it is necessary to frequently adjust the position of the carriage 101 until the yarn is fully stretched, which is troublesome.
In order to solve the above problem, it is conceivable that the yarn W used for the mechanism is stretched in advance.
In the techniques of Patent Documents 1 and 2, when a yarn is wound around a winding drum, a predetermined tension is applied so that the yarn can be wound while being stretched.

JP 2005-113291 A Japanese Utility Model Publication No. 6-6351

However, in the method of applying a predetermined tension when winding the yarn, it is difficult to continue applying tension to the yarn for a long time, and thus the yarn cannot be sufficiently stretched.
For this reason, even if it uses the thread | yarn after winding up to a winding drum as a mechanism, initial elongation cannot be suppressed effectively.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to efficiently suppress the initial elongation of the yarn used as the power transmission means of the mechanism. That is.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is configured to be capable of rotating and reducing a diameter or a diameter of a drum support portion that supports a wound drum around which a yarn used as a power transmission means for a mechanism is wound. The winding drum configured to wind the yarn from the winding drum supported by the drum support portion, and the winding drum after winding the yarn are expanded in diameter to apply tension to the yarn. And a tension applying mechanism.

  According to the present invention, after winding a yarn used as a power transmission means of a mechanism with a winding drum, the winding drum is expanded in diameter to apply tension to the yarn. For this reason, the tension applied to the yarn can be easily adjusted, and the time for applying the tension to the yarn can be freely set. Accordingly, the yarn can be sufficiently stretched, and the initial elongation of the yarn can be efficiently suppressed by using the yarn as a mechanism for transmitting power.

According to a second aspect of the present invention, a lock mechanism for holding the winding drum in an expanded state is provided.
For this reason, it can be left in a state where tension is applied to the yarn, and tension can be easily applied to the yarn for a long time.

According to the invention of claim 3, between the drum support portion and the winding drum, when the yarn is wound around the winding drum, the yarn between the winding drum and the winding drum is A yarn moving mechanism for moving in the axial direction of the winding drum is provided.
For this reason, the yarn wound on the take-up drum does not overlap in the radial direction of the take-up drum, and a uniform tension can be applied to the yarn when the diameter of the take-up drum is expanded. Become.

According to the invention of claim 4, when the yarn is wound around the take-up drum, the drum support portion is provided with a resistance applying portion that applies a rotational resistance to the bobbin drum supported by the drum support portion. Is provided.
For this reason, when winding the yarn on the winding drum, a predetermined tension can be applied to the yarn.

According to invention of Claim 5, the drum support part is comprised so that rotation can be supported in the state which separated the pincushion drum from the resistance provision part, It is characterized by the above-mentioned.
For this reason, it is possible to effectively wind up the yarn wound around the winding drum using the yarn winding drum.

  According to the present invention, it is possible to suppress the initial elongation of the yarn used as the power transmission means for the mechanism.

1 is an overall perspective view illustrating a yarn stretcher according to Embodiment 1 of the present invention. It is a side view showing the winding drum of the yarn drawing device. It is a side view showing the yarn moving mechanism of the yarn drawing device. It is a side view (A figure) showing the drum support part of the said yarn stretcher, and a perspective view (B figure) showing a mode that a thread | yarn is wound around a spool drum. It is a top view showing an example of the mechanism which uses a thread | yarn as a power transmission means.

[Embodiment 1]
Hereinafter, the yarn stretcher according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. The yarn stretcher 10 according to the present embodiment is a device that stretches a nylon yarn used for karakuri, and includes a T-type base 12, a yarn stretcher main body 10x, a yarn moving mechanism 40, a drum support 50, and the like. It is composed of
Here, front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down of the yarn stretcher 10.
The T-shaped base 12 includes a rectangular tube-shaped front and rear base piece 14 extending in the front-rear direction and a rectangular tube-shaped left and right base piece 13 extending in the left-right direction. The front end of the piece 14 is connected to form a plane T shape. On the front and rear base pieces 14 of the T-type base 12, the yarn stretcher main body 10x, the yarn moving mechanism 40, and the drum support portion 50 are arranged in order from the front side.

<About the yarn stretcher body 10x>
The yarn stretcher main body 10x is a portion that winds the yarn W and applies tension to the wound yarn W, and is installed on the front and rear base pieces 14 of the T-type base 12 in a horizontally rotatable state. The yarn stretcher main body 10x includes a winding drum 20 configured to wind the yarn W, and a tension applying mechanism 30 that expands the winding drum 20 to apply tension to the yarn W.
As shown in FIGS. 1 and 2, the winding drum 20 includes a rotating strut 21, four drum pieces 22 that are arranged around the rotating strut 21 at intervals of 90 °, and on which the yarn W is wound from the outside. , Each of the drum pieces 22 and the rotating support column 21 are connected to each other and four sets of link mechanisms 24 are configured.

As shown in FIG. 2, the rotary column 21 is formed in a cylindrical shape, and as shown in FIG. 2, the lower end 21 e of the rotary column 21 is rotated around the axis by a short tubular first bearing 14 j formed upward on the T-type base 12. Is rotatably supported. In addition, the rotary column 21 is provided with a pulley 21p on which the belt V is hung on the upper side of the lower end 21e, and a lower flange 21f is fixed on the upper side of the pulley 21p. And the square stay 21s which the link mechanism 24 corresponding to each drum piece 22 connects with the upper surface of the lower flange 21f is formed at intervals of 90 ° in the circumferential direction.
Further, an upper flange 32 configured to be movable along the rotary column 21 is provided on the upper portion of the rotary column 21, and a link mechanism corresponding to each drum piece 22 is provided on the lower surface of the upper flange 32. The rectangular stays 32s to be connected by the 24 are formed at intervals of 90 ° in the circumferential direction. The upper flange 32 includes a cylindrical portion 32e through which the rotary column 21 is inserted, and a through-hole 32w (female screw hole 32w) in which a female screw is formed on the side surface of the cylindrical portion 32e is formed in the radial direction. . The male screw 38n formed on the shaft portion of the lock handle 38 is screwed into the female screw hole 32w. Thus, by screwing the male screw 38n of the lock handle 38 into the female screw hole 32w of the upper flange 32, the outer peripheral surface of the rotary column 21 can be pressed with the tip of the male screw 38n. The vertical movement of the upper flange 32 is prohibited.

The four sets of link mechanisms 24 are mechanisms for connecting each drum piece 22 and the rotary support column 21 so that the four drum pieces 22 can be uniformly expanded or reduced in diameter. Each of the link mechanisms 24 has the same configuration, and includes an upper link 241 and a lower link 242 connected in an X shape. The upper link 241 and the lower link 242 are connected in a state in which their positions near their tips can be turned up and down by a connecting pin 24x. And the base end part of the upper side link 241 is connected with the square stay 32s of the upper flange 32 so that it can rotate up and down via the connection pin 24u etc. Further, the base end portion of the lower link 242 is connected to the square stay 21s of the lower flange 21f so as to be vertically rotatable by a connecting pin 24d or the like. Further, the upper end portion of the upper link 241 is connected to the lower portion of the link receiving portion 220 provided on the back side of the drum piece 22 so as to be vertically rotatable by a longitudinally long hole 221 and a connecting pin 24z. Further, the front end portion of the lower link 242 is connected to the upper portion of the link receiving portion 220 of the drum piece 22 so as to be vertically rotatable by a connecting pin 24y or the like.
With the above configuration, when the upper flange 32 is lowered along the rotary column 21, the base end portion of the upper link 241 of each link mechanism 24 is pushed down, and the upper link 241 and the lower link 242 are centered on the connecting pin 24x. In a direction approaching each other. Thereby, each link mechanism 24 operates to extend in the radial direction, and each drum piece 22 moves in the diameter expanding direction. Further, when the upper flange 32 rises along the rotary column 21, the base end portion of the upper link 241 of each link mechanism 24 is pulled up, and the upper link 241 and the lower link 242 are mutually connected around the connecting pin 24x. It rotates in the direction of separation. Thereby, the dimension of the radial direction of each link mechanism 24 reduces, and each drum piece 22 moves to a diameter reduction direction.

As shown in FIG. 1, the drum piece 22 is configured to wind up the yarn W by horizontally rotating around the rotary support column 21 as a set of four drum pieces 22. The drum piece 22 projects to the front side with respect to the bobbin winder vertical plate part 22d at the lower end position of the bobbin winder vertical plate part 22d, and the bobbin winder vertical plate part 22d, which is a square plate having a circular cross section in the shape of an arc. It is comprised from the shelf-shaped horizontal board part 22s formed in this way. The yarn W is wound around the surface of the vertical line portion 22d for bobbin winding, that is, the convex arc surface. Further, the above-described link receiving portion 220 is provided at the center of the concave arc surface which is the back surface of the bobbin winder vertical plate portion 22d.
Furthermore, a hook 22 f on which the end of the yarn W is hung is formed on the upper and lower portions of the back surface of the drum piece 22.

The tension applying mechanism 30 is a mechanism that applies a tension to the yarn W by pushing down the upper flange 32 to increase the diameter of each drum piece 22 after the yarn W is wound around the winding drum 20. The tension applying mechanism 30 is fixed to the upper end portion of the rotary support column 21 and protrudes in the lateral direction, and the operation arm 31 is connected to the support portion 34 through a connecting pin 34p so as to be vertically rotatable. And an oblique link 33 that connects an intermediate position of the operation arm 31 and an upper stay 32j provided on the upper surface of the upper flange 32. The upper end of the oblique link 33 is connected to the middle position of the operation arm 31 so as to be rotatable up and down by a connecting pin 33u, and the lower stay of the oblique link 33 is turned up and down by a connecting pin 33d. 32j.
With the above configuration, the upper flange 32 can be pushed down by the oblique link 33 by holding the operation end 31 t of the operation arm 31 and rotating the operation arm 31 downward. Thereby, each drum piece 22 moves in the diameter-expanding direction by the action of each link mechanism 24, and tension can be applied to the yarn W wound around the winding drum 20. In this state, the male screw 38n of the lock handle 38 is screwed into the female screw hole 32w of the upper flange 32, and the vertical movement of the upper flange 32 with respect to the rotary support column 21 is prohibited, thereby applying tension to the yarn W. Can be kept in a state.
Furthermore, the rotary support 21, the link mechanism 24, and the drum piece 22 can be horizontally rotated by holding the operation end 31 t of the operation arm 31.
That is, the male screw 38n of the lock handle 38 and the female screw hole 32w of the upper flange 32 correspond to the lock mechanism of the present invention.

<About the yarn moving mechanism 40>
When the yarn W is wound around the take-up drum 20, the yarn moving mechanism 40 gradually moves the yarn W before being taken up by the take-up drum 20 upward, so that the yarn W is taken up by the take-up drum. This is a mechanism that prevents the portion 20 from overlapping in the radial direction. As shown in FIG. 3, the yarn moving mechanism 40 includes a spiral strut 43 that moves the yarn W upward, a lower end bearing portion 44 that supports the spiral strut 43 so as to be rotatable about its axis, an upper end support portion 45, The rotating strut 43 is configured to rotate in synchronization with the winding drum 20.
The spiral strut 43 is formed in a cylindrical shape, and as shown in FIG. 3, the lower end portion 43 e of the spiral strut 43 is rotated around the axis by a short tubular lower end bearing portion 44 formed upward on the T-type base 12. Is rotatably supported. Further, the upper end portion 43u of the spiral support column 43 is supported by the upper end support portion 45 so as to be rotatable about the axis.

The upper end support portion 45 includes a support portion 45p erected in parallel with the spiral support column 43, and a beam portion 45h provided so as to project laterally from the upper portion of the support portion 45p. A bearing hole 45j through which the upper end portion 43u of the spiral column 43 is inserted is formed at the tip of the beam portion 45h.
The spiral strut 43 is provided with a pulley 43p on which the belt V of the rotation mechanism 47 is hung above the lower end portion 43e. Further, the spiral strut 43 is provided with a ridge 43r spirally from the upper side of the pulley 43p to the lower side of the beam portion 45h. Here, the protrusion 43r is configured by, for example, winding a string-like object around the outer peripheral surface of the spiral support column 43 and fixing it. And the space | interval of the protrusion 43r and the protrusion 43r is set so that the thread | yarn W which contact | abutted to the outer peripheral surface of the spiral support | pillar 43 may fit in the trough part of the protrusion 43r and the protrusion 43r. Further, the winding direction of the spiral protrusion 43r is set to a direction in which the thread W can be moved upward when the spiral support 43 rotates clockwise (see the arrow in FIG. 3) by the rotation mechanism 47. ing.

<Drum support 50>
As shown in FIGS. 4A and 4B, the drum support portion 50 is a portion that supports the bobbin drum 5 around which the yarn W used for karakuri is wound in a state of being horizontally rotatable. The drum support portion 50 includes a screw shaft 52 that serves as a rotation center of the bobbin drum 5 and an outer periphery presser portion 54 that presses the lower outer periphery 5r of the bobbin drum 5 from the outside in the radial direction and applies rotational resistance. . The screw shaft 52 is erected on the T-type base 12 by a fixing nut 51. A drum support nut 53u that supports the bobbin drum 5 from below in a state where the screw shaft 52 is passed through the center of the bobbin drum 5 is disposed at the upper center position of the screw shaft 52.
The outer periphery pressing portion 54 includes a horizontal bar portion 54y projecting laterally below the drum support nut 53u, and a plate spring 55 fixed to a spring receiving member 54f at the tip of the horizontal bar portion 54y. . A through hole (not shown) through which the screw shaft 52 passes is formed in the base end portion of the horizontal bar portion 54y. Then, the screw shaft 52 is passed through the through hole of the horizontal bar portion 54y, and the base end portion of the horizontal bar portion 54y is sandwiched from above and below by the fixing nuts 53m and 53d and tightened. It is fixed to the shaft 52. The tip of the leaf spring 55 is configured to press the lower outer peripheral portion 5r of the bobbin drum 5 from the outside in the radial direction while the horizontal bar portion 54y is fixed to the screw shaft 52.
That is, the leaf spring 55 of the outer periphery pressing portion 54 corresponds to the resistance applying portion of the present invention.

Further, by shifting the position of the drum support nut 53u upward, the bobbin drum 5 is rotatably supported in a state where the lower outer peripheral part 5r of the bobbin drum 5 is separated from the leaf spring 55 of the outer periphery pressing part 54. Is possible.
The drum support 50 is provided with an operation lever 58. As shown in FIG. 4B, the operation lever 58 is a lever that is attached to the upper surface of the bobbin drum 5 when the bobbin drum 5 is freely rotated, and a rotation center portion (not shown) of the operation lever 58 is provided. The upper end of the screw shaft 52 is fitted in a rotatable state.

<Handling of the yarn stretcher 10>
When the yarn W is stretched by the yarn stretcher 10, first, the bobbin drum 5 is set on the screw shaft 52 of the drum support 50 as shown in FIG. At this time, the height of the bobbin drum 5 is adjusted by the drum support nut 53u so that the lower outer periphery 5r of the bobbin drum 5 can be pressed from the outside in the radial direction by the leaf spring 55 of the outer periphery presser 54.
Next, the yarn W is pulled out from the bobbin drum 5, and as shown in FIG. 1, the yarn W is hung from the left side on the outer peripheral surface of the column part 45p of the yarn moving mechanism 40, and further, the outer periphery of the spiral column 43 is applied from the right side. Multiply. Then, the leading end (tip) of the yarn W is connected to the lower hook 22 f of the winding drum 20.
Next, the lock handle 38 of the yarn tensioning device main body 10x is rotated in the loosening direction to allow the upper flange 32 to move up and down with respect to the rotary column 21 (lock state is released), and the upper arm 32 is pulled up to the upper limit position by the operation arm 31. Thus, the winding drum 20 is reduced in diameter. In this state, the lock handle 38 is tightened, and the vertical movement of the upper flange 32 with respect to the rotating column 21 is prohibited (locked state).

  Next, the winding drum 20 is rotated clockwise using the operation arm 31 so that the yarn W is wound around the winding drum 20. At this time, since the lower outer peripheral portion 5r of the bobbin drum 5 is pressed from the outside in the radial direction by the leaf spring 55 of the drum support portion 50, tension is applied to the yarn W. Further, since the rotation of the winding drum 20 is transmitted from the pulley 21p of the rotating column 21 to the pulley 43p of the spiral column 43 via the belt V, the spiral column 43 rotates clockwise in synchronization with the winding drum 20. become. Thereby, the thread | yarn W which contact | abutted to the outer peripheral surface of the spiral support | pillar 43 and fitted into the valley part of the spiral protrusion 43r moves gradually upwards by the effect | action of the spiral protrusion 43r. As a result, the yarn W wound on the winding drum 20 does not overlap in the radial direction on the winding drum 20. In this way, the final end of the yarn W is connected to the upper hook 22 f of the winding drum 20 with the yarn W of the winding drum 5 wound on the winding drum 20.

Next, the lock handle 38 of the yarn tensioning device main body 10x is rotated in the loosening direction to release the locked state between the upper flange 32 and the rotary column 21, and the operation arm 31 is operated in the push-down direction. Thereby, each drum piece 22 moves in the diameter increasing direction by the action of each link mechanism 24 of the winding drum 20, and tension is applied to the yarn W wound on the winding drum 20. In this state, the lock handle 38 is rotated in the tightening direction to prohibit the vertical movement of the upper flange 32 with respect to the rotary support column 21 (locked state), and the tension is applied to the yarn W. Then, after being left for about 10 minutes, the locked state is released by the lock handle 38, and the operating arm 31 is operated again in the push-down direction to apply tension (tighten it). Further, after tightening, the lock handle 38 is again locked and left for about one day. Thereafter, the tightening is performed again. After the tightening, the thread is left for about one day to finish the yarn stretching operation.
In this way, when the yarn extending operation is completed, the drum support nut 53u of the drum support 50 is moved upward, and the empty bobbin drum 5 is set on the screw shaft 52 so as not to contact the leaf spring 55. Then, as shown in FIG. 4B, the operation lever 58 is set on the upper surface of the bobbin drum 5. Next, the final end of the yarn W of the take-up drum 20 is connected to the bobbin drum 5, and the bobbin drum 5 is rotated using the operation lever 58 so that the yarn W is wound from the take-up drum 20 to the bobbin drum 5. To. Then, the operation is completed in a state where the yarn W is wound around the bobbin drum 5.
Thus, since the yarn W used for the mechanism is stretched over time, even if this yarn W is used for the mechanism, problems caused by the initial elongation of the yarn W can be suppressed.

<Advantages of the yarn stretcher 10 according to this embodiment>
According to the yarn stretcher 10 according to the present embodiment, after winding the yarn used as the power transmission means for the karakuri around the winding drum 20, the winding drum 20 is expanded to apply tension to the yarn W. Can do. Therefore, the tension applied to the yarn W can be easily adjusted, and the time for applying the tension to the yarn W can be set freely. Therefore, the yarn W can be sufficiently stretched, and the initial elongation of the yarn W can be efficiently suppressed by using the yarn W as a mechanism for transmitting power.
In addition, since the lock handle 38 or the like (lock mechanism) that holds the winding drum 20 in the diameter-expanded state is provided, the yarn W can be left in a tensioned state, and the yarn W can be easily left for a long time. Tension can be applied.

Further, since the yarn moving mechanism 40 is provided between the drum support portion 50 and the take-up drum 20, the yarn W taken up by the take-up drum 20 does not overlap in the radial direction. When expanding the take-up drum 20, a uniform tension can be applied to the yarn W.
Further, the drum support portion 50 is provided with a leaf spring 55 (resistance applying portion) that applies rotational resistance to the yarn winding drum 5 when the yarn W is wound around the winding drum 20. A predetermined tension can be applied to the yarn W when the yarn W is wound around the winding drum 20.
Further, since the drum support portion 50 is configured to be able to rotatably support the pincushion drum 5 in a state separated from the leaf spring 55 (resistance applying unit), the winding drum 20 using the pincushion drum 5 is used. It becomes possible to effectively wind the yarn W wound around the wire.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the present embodiment, an example in which the take-up drum 20 is configured from four drum pieces 22 and four sets of link mechanisms 24 has been described, but three drum pieces 22 and three sets of link mechanisms 24 are illustrated. It is also possible to constitute the winding drum 20 from the above.
Further, in the present embodiment, an example in which the drum piece 22 is expanded by lowering the upper flange 32 with respect to the rotating column 21 by rotating (pressing down) the operation arm 31 downward has been shown. However, a male screw is formed on the rotating column 21 side, a female screw hole is formed on the upper flange 32 side, and the upper flange 32 is attached to the rotating column 21 by utilizing the screwing action of the male screw and the female screw hole. On the other hand, the structure which descend | falls is also possible.
Further, in the present embodiment, an example in which the lock mechanism is configured by the male screw 38n of the lock handle 38, the female screw hole 32w of the upper flange 32, and the like is shown. However, a configuration in which the upper flange 32 is connected to the lower flange 21f of the rotary column 21 by a hook or the like to hold the drum piece 22 in an expanded state is also possible.

5... Winding drum 20... Winding drum 22... Drum piece 24... Link mechanism 30.
38... Lock handle (lock mechanism)
38n ... Male thread (lock mechanism)
40... Yarn moving mechanism 50... Drum support 54.
55... Leaf spring (resistance applying part)
W ... Thread

Claims (5)

A drum support portion that supports a spool that is wound with a yarn used as a power transmission means of the mechanism in a rotatable state;
A take-up drum configured to be able to reduce the diameter or expand, and configured to wind up the yarn from a spool drum supported by the drum support;
A tension applying mechanism that expands the diameter of the winding drum after winding the yarn and applies tension to the yarn;
A yarn stretcher characterized by comprising: The yarn drawing device according to claim 1, wherein
A yarn stretcher comprising a lock mechanism for holding the winding drum in an expanded state. A yarn drawing device according to claim 1 or 2, wherein
Between the drum support portion and the winding drum, when the yarn is wound on the winding drum, the yarn between the winding drum and the winding drum is moved in the axial direction of the winding drum. A yarn stretcher comprising a yarn moving mechanism for moving the yarn. A yarn drawing device according to any one of claims 1 to 3,
The drum support portion is provided with a resistance applying portion that applies rotational resistance to the yarn winding drum supported by the drum support portion when the yarn is wound around the winding drum. A yarn stretcher characterized by comprising: The yarn stretcher according to claim 4, wherein
The yarn stretching device, wherein the drum support portion is configured to be able to rotatably support the bobbin drum in a state separated from the resistance applying portion.

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