JP2010090973A - Penetration type wire chuck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a penetration type wire chuck stabilizing a positioning state with a wire being hardly slipped, and suitably maintaining a holding force over a long period of time. <P>SOLUTION: The penetration type wire chuck 10 includes: a body 30 having an irregular diameter hole 20 formed through; a sleeve 40 stored in the irregular diameter hole 20 with a wire 5 being inserted to a wire insert hole 41 in such a manner as to be capable of advancing and recessing; a gear 60 supported by the sleeve 40; and a biasing means such as a coil spring 70 disposed within the body 30 to bias the sleeve 40 toward the minor diameter side of the irregular diameter hole 20. The wire 5 is fixed within the sleeve 40 by pressing the gear 60 between the wire 5 inserted to the sleeve 40 and the irregular diameter hole 20. Teeth having a crest-trough shaped section which are formed on the circumferential surface of the gear 60 are bitten into the wire 5, whereby a high holding force is exhibited. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire used for a hanging tool for suspending a ceiling plate, a lighting fixture, an advertising board, a guide board, a hanging curtain, a decorative article, a display tool and other various articles from a high place via a wire. The present invention relates to a chuck, and more particularly, to a so-called through-type wire chuck that can easily and safely fix a wire inserted in an axial direction at an arbitrary position.

  Suspension tools that can be freely fixed at an arbitrary position by inserting a wire are widely known, including those disclosed in the following patent documents. This type of suspension uses a so-called pull-out type wire chuck mechanism. The basic structure of the mechanism is shown in FIG.

In the wire chuck 1, the wire 5 is inserted into a cylindrical body 3 in which a different diameter hole 2 having a tapered portion 21 at least partially penetrates, and a wire insertion hole 41 formed to penetrate along an axis. In this state, the sleeve 4 is movably accommodated in the different diameter hole 2, the two to four balls 6 are supported on the sleeve 4 so as to be movable in the direction perpendicular to the axis, and the different diameter hole 2. An urging means such as a coil spring 7 disposed inside is provided. Then, by pressing the sleeve 4 toward the reduced diameter side of the different diameter hole 2 by the biasing means, the ball 6 is clamped between the wire 5 inserted into the sleeve 4 and the taper portion 21, and the clamping pressure To fix the wire 5 in the sleeve 4. Further, when the sleeve 4 is moved to the diameter expansion side of the different-diameter hole 2 against the biasing means, the pinching force of the ball 6 is released, the wire 5 is loosened, and the position of the hanging tool can be adjusted freely. Can do.
Japanese Utility Model Publication No. 57-107472 Japanese Utility Model Publication No. 58-73162 Japanese Utility Model Publication No. 4-47454 Japanese Patent Laid-Open No. 11-247948

  In the conventional wire chuck that fixes the wire by the pinching force of the ball, the wire is loosened and the position is adjusted, and after a slight operation from the tension of the wire to the ball pinching force acting on the wire. The contact surface between the ball and the wire may slip, and the fixing position of the wire may be slightly shifted (several millimeters).

  Moreover, the fixed position of the wire may be gradually lowered due to vibration, shaking, impact, or the like acting in the suspended state.

  Accordingly, an object of the present invention is to provide a pull-out type wire chuck in which a wire is less slippery, the positioning state is more stable than before, the holding force of the wire is improved, and the wire chuck is suitably maintained over a long period of time. .

  In order to achieve the above-described object, the through-type wire chuck of the present invention has a wire inserted through a body through which a different diameter hole having a tapered portion is formed and a wire insertion hole formed through the axis. In this state, the sleeve accommodated in the different diameter hole so as to be able to advance and retreat in the axial direction of the different diameter hole, and at least one sleeve supported by the sleeve so as to be movable in a direction perpendicular to the axial center of the sleeve. A locking member; and an urging means disposed in the body for urging the sleeve toward the small diameter side of the different diameter hole, between the wire inserted into the sleeve and the different diameter hole In a pull-out type wire chuck that fixes a wire in a sleeve by clamping the locking member, the locking member is a gear having teeth of a cross-sectionally valley shape formed on a peripheral surface of a cylindrical body. And

  That is, according to the present invention, a ball that acts to clamp a wire in a conventional wire chuck is replaced with a gear. According to this configuration, when the peripheral surface of the gear in which the teeth in the form of peaks and valleys come into contact with the surface of the wire, it immediately bites the wire and exerts a large frictional force with the wire. Therefore, in comparison with the conventional ball, the disadvantage that the wire slips and the fixing position of the wire slightly shifts can be greatly improved. In addition, since the gear teeth bite into the wire, the wire is less likely to loosen even when subjected to shaking or vibration, and a high clamping force can be obtained over a long period of time.

  It is realistic that the number of gears in this invention is 1 to 3. When there is one gear, one side of the wire is pinched. If the two gears are arranged to face each other, the side surface of the wire is pinched from both sides, and a mechanically preferable pinching state is obtained. However, the two gears may be arranged so as to face each other while being slightly shifted in the axial direction of the sleeve so that the wire is bent in an S-shape in a side view and pinched. In this case, the size of the two gears may be changed. When there are three gears, it is preferable to arrange the three gears so that the cross-sectional shape of the wire is sandwiched between triangles.

  In this through-type wire chuck, the sleeve has a tapered shaft portion that has a tapered shape that matches the tapered portion of the different diameter hole and is inserted into the tapered portion, and the taper shaft portion has an axis center of the sleeve. A gear mounting hole having a rectangular shape in a side view penetrating through the tapered shaft portion is formed in a direction orthogonal to the gear mounting hole, and the gear can be mounted in the gear mounting hole. According to this configuration, when two gears are arranged to face each other, each gear can be suitably held so as to be able to smoothly move in a direction perpendicular to the axis and to stabilize its posture.

  Further, in this through-type wire chuck, a gear guide groove extending in the axial direction of the different diameter hole is formed on the inner peripheral surface of the different diameter hole of the body, and in a state where the gear is mounted in the gear mounting hole of the sleeve, When the sleeve is inserted into the different-diameter hole of the body, a part of the gear protruding to the side of the sleeve may be guided to the back of the different-diameter hole along the gear guide groove. According to this configuration, in the assembling work in which the gear is mounted in the gear mounting hole of the sleeve and inserted into the different diameter hole of the body, the gear position is not shifted or dropped, and workability is improved. In addition, the sleeve on which the gear is mounted does not rotate around the shaft in the different diameter hole, the pinching posture of the gear is always stable, and malfunction due to gear shift or catching is less likely to occur.

 Further, in the pull-out type wire chuck of the present invention, one end of the sleeve may be extended to the outside of the body toward the large diameter side of the different diameter hole. If this configuration is adopted, when the article is suspended with the large-diameter portion of the different-diameter hole facing downward, the lower end of the sleeve is projected below the article while the lower end of the body is connected to the article. I can leave. If the wire is pulled through the sleeve in this state from the top to the bottom, the operation of loosening the fixing of the wire by pulling the lower end of the sleeve downward while supporting the weight of the article from the lower side of the article becomes possible. Therefore, even if the article to be suspended is, for example, a large plate-like member or a lighting fixture, and it is difficult for the operator to reach his / her hand up to the article, the article can be easily and alone from the lower side of the article. The attachment / detachment work and the height adjustment work can be performed.

  According to the pull-out type wire chuck of the present invention using a gear instead of a ball as a locking member, the peripheral surface of the gear formed with a mountain-like tooth is suitably engaged with the surface of the wire, Exhibits a large frictional force. As a result, even in the wire position adjustment work, the contact surface between the gear and the wire slips and the fixing position of the wire shifts from the loosened state to the tensioning of the wire and the application of the pinching force of the gear. This can eliminate the inconvenience. In addition, since the gear teeth bite into the wire, the wire is less likely to loosen even when subjected to shaking or vibration, and a high clamping force can be obtained over a long period of time.

  The best mode for carrying out the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a pull-through wire chuck according to the present invention, FIG. 2 is an exploded perspective view of the pull-through wire chuck, and FIG. 3 is a cross-sectional view of the same.

  The wire chuck 10 according to the exemplary embodiment includes a body 30 in which a hole 20 having a different diameter is formed, a hollow shaft-like sleeve 40 accommodated in the hole 20 having a different diameter, and two gears supported by the sleeve 40. 60 and a coil spring 70 as an urging means for urging the sleeve 40.

  The body 30 is substantially cylindrical and has an outer shape in which the upper end in the drawing is partially reduced in diameter. (In FIG. 1, the body 30 is drawn in a half state to show the internal shape of the body 30.) The different-diameter hole 20 formed inside the body 30 has a tapered portion at the top. 21, and a cylindrical portion 22 having a diameter equal to the large diameter side of the tapered portion is continuous below the tapered portion. A female screw 23 is formed in a substantially lower half of the cylindrical portion 22. A gear guide groove 24 for guiding the gear 60 is formed on the inner peripheral surface of the different diameter hole 20 so as to face each other with the shaft center of the different diameter hole 20 therebetween and to extend in the axial direction of the different diameter hole 20. ing. Further, as shown in FIG. 3, a D-cut process 31 is applied to the lower half of the body 30 so as to be convenient for joining with various other members.

  The sleeve 40 is a part formed by, for example, cutting a round bar, and a wire insertion hole 41 having a diameter slightly larger than the thickness of the wire 5 is formed through the shaft center from the upper end to the lower end. ing. A taper shaft portion 42 having a taper angle similar to that of the taper portion 21 of the different-diameter hole 20 is provided in the middle portion of the sleeve 40, and has a diameter equal to that of the small diameter side on the upper side, that is, on the small diameter side. The diameter shaft portion 43 is continuous, and a small diameter shaft portion 44 that is thinner than the medium diameter shaft portion 43 is continuous below the taper portion 21, that is, on the large diameter side.

  With the tapered shaft portion 42 inserted into the tapered portion 21 of the different diameter hole 20, the medium diameter shaft portion 43 projects with a sufficient length from the upper end opening of the body 30, and the small diameter shaft portion 44 is sufficiently extended from the lower end opening of the body 30. It is formed to protrude with a long length. The opening of the wire insertion hole 41 at the upper end of the medium-diameter shaft portion 43 has an inner peripheral surface that is enlarged in a trumpet shape to facilitate the insertion of the wire 5. In addition, although illustration is omitted, in order to facilitate gripping with a fingertip, for example, the diameter is partially increased or an anti-slip process is performed in the vicinity of the lower end portion of the small-diameter shaft portion 44 protruding from the body 30. Appropriate knobs that have been applied may be formed.

  A gear mounting hole 45 is formed in the taper shaft portion 42 of the sleeve 40 so as to face the shaft center of the sleeve 40. The gear mounting hole 45 has a uniform cross-sectional shape having a rectangular shape in side view from the wire insertion hole 41 to the outer peripheral surface, and penetrates the tapered shaft portion 42 in a direction perpendicular to the axis of the sleeve 40. A pair of gears 60 are mounted in the gear mounting holes 45 so as to face each other with the shaft center therebetween.

  The gear 60 is a cylindrical member made of ceramic, metal, or the like, and a plurality of teeth having a mountain-valley cross section extending in the generatrix direction are formed on the peripheral surface thereof. The gear 60 is accommodated in the gear mounting hole 45 in a posture in which the central axis thereof is horizontal, and is held so that it can move in a direction perpendicular to the axis of the sleeve 40 while rolling in the gear mounting hole 45. The

  The coil spring 70 is formed so that the winding diameter becomes thinner, and is accommodated in the different diameter hole 20 while being inserted into the small diameter shaft portion 44 of the sleeve 40. The upper end of the coil spring 70 abuts on the lower stepped surface of the taper shaft portion 42 and urges the sleeve 40 in the push-up direction. The lower end of the coil spring 70 abuts against a presser member 80 mounted on the cylindrical portion 22 of the different diameter hole 20 and is restrained so as not to drop out or jump out from the different diameter hole 20.

  The pressing member 80 is a short cylindrical member having a male screw formed on the outer peripheral surface thereof, and is screwed into the female screw 23 formed in the cylindrical portion 22 of the different diameter hole 20. A cylindrical hole 81 through which the small-diameter shaft portion 44 of the sleeve 40 can be loosely inserted is formed in the center portion of the pressing member 80. On the lower surface of the pressing member 80, a slit 82 or the like that can be engaged with an appropriate tool is formed.

  Below the presser member 80, a connection bolt 91 and the like for connecting the body 30 to the article 9 to be suspended are attached as necessary. The connection bolt 91 according to the illustrated embodiment is a member having a cut-out shape in which the length of the pressing member 80 is appropriately extended. For example, as shown in FIG. 1, an appropriate attachment formed on an article 9 such as a lighting fixture. The nut 92 is fastened by being inserted through the hole, so that it is fixed integrally with the article 9. However, the connection form with the article 9 is not limited to this, and a known connection form corresponding to each article shape can be appropriately adopted.

  In assembling the pull-out type wire chuck 10, the sleeve 40 is inserted into the different diameter hole 20 of the body 30 with the gear 60 mounted in the gear mounting hole 45 of the sleeve 40. A part of the gear 60 protruding to the side of the sleeve 40 is guided to the back of the different diameter hole 20 along the gear guide groove 24 formed in the different diameter hole 20, so that the gear 60 is displaced or dropped. Without setting, it is set in the tapered portion 21 of the different diameter hole 20 in a correct posture. When the sleeve 40 and the gear 60 are set in the different-diameter hole 20, the coil spring 70 is subsequently inserted into the small-diameter shaft portion 44 of the sleeve 40, and the presser member 80 is screwed to prevent it from coming off.

  In the hanging operation using the pull-out type wire chuck 10, the article 9 to be hung and the pull-out type wire chuck 10 are connected in advance via a connecting bolt 91 or the like. Then, the wire 5 suspended from the ceiling is inserted into the wire insertion hole 41 from above the sleeve 40. When the wire 5 is pushed in while the article 9 is supported with one hand and the sleeve 40 is pushed down slightly, the gear 60 is pushed outward in the gear mounting hole 45, and the tip of the wire 5 is easily inserted into the wire insertion hole. Pass under 41. Then, when the article 9 is lifted and released to a predetermined height while pulling the lower end of the wire 5 that has passed downward, the gear 60 is pinched between the wire 5 and the different-diameter hole 20, and the wire 5 The wire 5 is fixed by biting into the side surface.

  When adjusting the suspending height, the article 9 is supported by hand from below while pulling the lower end of the wire 5, and the sleeve 40 is pushed down to release the pinched state of the gear 60. At this time, if it is difficult to push down the intermediate diameter shaft portion 43 of the sleeve 40 from above the article 9, the protruding portion of the small diameter shaft portion 44 of the sleeve 40 can be grasped and pulled down from below the article 9. When the article 9 is positioned at a desired height, the article 60 held by the hand is gently released, or the sleeve 40 is pushed up slightly, so that the gear 60 bites into the wire 5 and the chuck function is immediately activated. Demonstrated.

  Since the punch-out type wire chuck 10 of the present invention is configured in this way, the peripheral surface of the gear 60 that forms the teeth in the form of valleys quickly digs into the side surface of the wire 5, and the friction between the wire 5 and the wire 5 is large. Demonstrate power. Therefore, it is possible to prevent the wire 5 from slipping during positioning to shift the fixing position of the wire 5. Further, the wire 5 is less likely to loosen due to shaking or vibration, and a high clamping force is exhibited over a long period of time.

  Further, since the gear guide groove 24 is formed in the body 30, the assembling work for inserting the sleeve 40 fitted with the gear 60 into the different diameter hole 20 of the body 30 is facilitated, and the clamping posture of the gear 60 is also improved. At all times, the malfunction is less likely to occur due to the gear 60 being displaced or caught.

FIG. 1 is a longitudinal sectional view showing a structure of a pull-out type wire chuck according to an embodiment of the present invention. 2 is a partially broken and exploded perspective view of the pull-through wire chuck shown in FIG. 3 is a cross-sectional view taken along the line A-A ′ in FIG. 1. FIG. 4 is a longitudinal sectional view showing a basic structure of a conventional pull-out type wire chuck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pull-out type wire chuck 20 Different diameter hole 21 Tapered part 24 Gear guide groove 30 Body 40 Sleeve 41 Wire insertion hole 42 Tapered shaft part 45 Gear mounting hole 60 Gear (locking member)
5 wire 70 coil spring (biasing means)

Claims (4)

In the axial direction of the different diameter hole in the different diameter hole in a state where the wire is inserted through the body through which the different diameter hole having the tapered portion is formed and the wire insertion hole formed through the axis. A sleeve accommodated so as to be able to advance and retreat; at least one locking member supported by the sleeve so as to be movable in a direction perpendicular to the axis of the sleeve; and the sleeve disposed in the body and having the different diameter. And a biasing means for biasing toward the small diameter side of the hole, and fixing the wire in the sleeve by clamping the locking member between the wire inserted into the sleeve and the hole of different diameter In through wire chuck,
The pull-out type wire chuck, wherein the locking member is a gear having teeth having a cross-sectional shape in the circumferential surface of a cylindrical body. The punch-out type wire chuck according to claim 1,
The sleeve includes a tapered shaft portion that has a tapered shape that matches the tapered portion of the different-diameter hole and is inserted into the tapered portion, and the tapered shaft portion has a tapered shaft portion in a direction orthogonal to the axial center of the sleeve. A through-type wire chuck characterized in that a rectangular gear mounting hole penetrating in a side view is formed, and a gear is mounted in the gear mounting hole. The punch-out type wire chuck according to claim 2,
A gear guide groove extending in the axial direction of the different-diameter hole is formed on the inner peripheral surface of the different-diameter hole of the body, and the sleeve is inserted into the different-diameter hole of the body in a state where the gear is attached to the gear attachment hole of the sleeve. In this case, a part of the gear protruding to the side of the sleeve is guided to the back of the different diameter hole along the gear guide groove. The pull-out type wire chuck according to any one of claims 1 to 3,
A pull-out type wire chuck characterized in that one end of the sleeve is extended to the outside of the body toward the larger diameter side of the different diameter hole.

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