Wire chucking mechanism
By adopting a simple structure wire clamping mechanism, using slidable clamps and rotating clamps, the problem of high manufacturing cost of traditional wire clamping mechanisms is solved, precise clamping and stability of wires are achieved, and the manufacturing process is simplified.
Patent Information
- Application Number
- JP2023151027
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-19
- Publication Date
- 2025-04-01
AI Technical Summary
The traditional wire clamping mechanism requires high-precision metal processing during the manufacturing process, resulting in high manufacturing costs.
The wire clamping mechanism with a simple structure is adopted, and the clamping and adjustment of the wire is achieved by equipped with slidable clamps and rotating clamps, reducing the need for high-precision machining.
The manufacturing process is achieved while reducing manufacturing costs while maintaining the accuracy and stability of wire clamping, and simplifying the manufacturing process.
Smart Images
Figure 2025043628000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a wire chuck mechanism. [Background technology]
[0002] Conventionally, there has been known a wire chuck pallet in a wire chuck mechanism that grips an electric wire and moves it to a predetermined working position (see, for example, Patent Document 1). The wire chuck pallet described in Patent Document 1 has a clamp that grips the electric wire and can be opened and closed freely, and a cam mechanism that opens and closes the clamp.
[0003] An example of an electric wire chuck pallet having a cam mechanism is shown in FIG. 11. FIG. 11 is a front view showing a conventional electric wire chuck pallet 100. The conventional electric wire chuck pallet 100 shown in FIG. 11 includes a pair of gripping parts 101H, 101H provided so as to be freely opened and closed in the left-right direction X, a sliding part 102T slidable in the up-down direction Y, and a pair of L-shaped swinging parts 103L, 103L provided between the pair of gripping parts 101H, 101H and the sliding part 102T. Each L-shaped swinging part 103L is rotatably supported by a one-side shaft part 105 provided at the lower end of each gripping part 101H by a cam groove 104A formed at one end thereof, and is rotatably supported by a other-side shaft part 106 provided at the upper end of the sliding part 102T by a cam groove 104B formed at the other end thereof.
[0004] In such a conventional wire chuck pallet 100, when the slide portion 102T is moved downward Y2, the lower ends of the pair of L-shaped oscillating portions 103L, 103L are moved downward Y2 and the upper ends of the pair of L-shaped oscillating portions 103L, 103L are brought closer to each other; in other words, when the pair of L-shaped oscillating portions 103L, 103L oscillate about the one-side shaft portion 105 and the other-side shaft portion 106, the pair of gripping portions 101H, 101H are moved in the closing direction to grip the electric wire. [Prior art documents] [Patent documents]
[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-161445 Summary of the Invention [Problem to be solved by the invention]
[0006] However, the conventional electric wire chuck pallet 100 requires high-precision metal processing when forming the cam grooves 104A, 104B, etc., and therefore has high manufacturing costs.
[0007] An object of the present invention is to provide a wire chuck mechanism that has a simple configuration and can reduce manufacturing costs while achieving desired alignment properties. [Means for solving the problem]
[0008] In order to solve the above problems and achieve the object, the invention described in claim 1 provides an electric wire chuck mechanism having a pair of arms for gripping an electric wire, and gripping the electric wire by bringing the pair of arms close to each other, the electric wire chuck mechanism comprising: a slide section provided opposite the pair of arms and slidable in an orthogonal direction perpendicular to a direction in which the pair of arms are arranged; a pair of first bosses protruding from the slide section toward the pair of arms and arranged side by side on the slide section in the arranging direction; a pair of second bosses protruding from each of the pair of arms toward the slide section; and a third boss protruding from the slide section toward the pair of arms and capable of entering between the pair of second bosses as the slide section slides, the pair of first bosses, the pair of second bosses, and the third boss being positioned in the orthogonal direction in this order. the pair of second bosses are offset from each other, and the pair of second bosses are located at positions capable of abutting against the pair of first bosses and the third boss, and as the sliding portion slides in one of the orthogonal directions, the pair of first bosses move to the one side, each of the first bosses abuts against each of the second bosses, and each of the first bosses is pushed by each of the second bosses to bring the pair of second bosses closer to each other, thereby displacing the pair of arm portions in the approaching direction, and as the sliding portion slides in the other of the orthogonal directions, the third boss moves to the other side, each of the third bosses abuts against each of the second bosses, the third boss enters between the pair of second bosses, and the pair of second bosses are pushed by the third boss to move the pair of second bosses away from each other, thereby displacing the pair of arm portions in the separating direction. Effect of the Invention
[0009] According to the invention as recited in claim 1, it is possible to reduce manufacturing costs with a simple configuration and achieve desired alignability. [Brief description of the drawings]
[0010] [Figure 1]FIG. 1 is a perspective view showing an electric wire chuck mechanism according to a first embodiment of the present invention, illustrating a state in which a pair of arms are brought close to each other to grip an electric wire. [Diagram 2] FIG. 4 is a side view showing the electric wire chuck mechanism. [Diagram 3] FIG. 11 is a perspective view showing a state in which the pair of arms are close to each other to grip an electric wire, and shows a state in which a part of a support structure that constitutes the electric wire chuck mechanism is removed to expose a slide portion. [Figure 4] FIG. 13 is a perspective view showing a state in which the pair of arms are separated and the electric wires are released, and shows a state in which a part of the support structure is removed to expose the slide portion. [Diagram 5] FIG. 13 is a conceptual diagram showing a state in which the pair of arms are separated from each other. [Figure 6] FIG. 13 is a conceptual diagram showing a state in which the pair of arms are close to each other. [Figure 7] FIG. 13 is a conceptual diagram showing a modified example of the electric wire chuck mechanism. [Figure 8] FIG. 11 is a conceptual diagram showing a wire chuck mechanism according to a second embodiment of the present invention, illustrating a state in which the pair of arms are close to each other. [Figure 9] FIG. 4 is a conceptual diagram showing the electric wire chuck mechanism, illustrating a state in which the pair of arms are separated from each other. [Figure 10] FIG. 4 is a conceptual diagram showing a state in which a pair of the wire chuck mechanisms are arranged. [Figure 11] FIG. 1 is a front view showing a conventional electric wire chuck pallet.
[0011] Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 6. Fig. 1 is a perspective view showing an electric wire chuck mechanism 1 according to an embodiment of the present invention, illustrating a state in which a pair of arms 2L, 2R approach each other and grip an electric wire W. Fig. 2 is a side view showing the electric wire chuck mechanism 1.
[0012] As shown in FIGS. 1 and 6 , the electric wire chuck mechanism 1 of the present embodiment includes a base 10, an arm structure 12 that is uprightly provided on the base 10 and has a left arm 2L and a right arm 2R (a pair of arms) that are configured to be movable toward and away from each other in a left-right direction X and can grip an electric wire W, a cam structure 13 that has a slide portion 3 that moves the pair of arms 2L, 2R toward and away from each other by sliding in a vertical direction Y (orthogonal direction), a support structure 14 that supports the arm structure 12 and the cam structure 13, and a coil spring 15 (biasing means, shown in FIG. 6 ) that biases the slide portion 3 downward Y2 (one of the orthogonal directions) to maintain the electric wire W in a gripped state.
[0013] As shown in FIG. 1, the wire chuck mechanism 1 of the present embodiment is configured to hold an electric wire W between a pair of arms 2L, 2R by bringing the pair of arms 2L, 2R close to each other while the electric wire W is positioned between the pair of arms 2L, 2R, and to move the pair of arms 2L, 2R away from the electric wire W and release the electric wire W by moving the pair of arms 2L, 2R away from each other, as shown in FIG. 4.
[0014] In this embodiment, the arrows X, Y, and Z are directions perpendicular to each other. The arrow X is the direction in which the pair of arms 2L and 2R move toward and away from each other (the direction in which the pair of arms are aligned), and may be referred to as the "left-right direction." The arrow Y is the direction in which the sliding portion 3 slides (the perpendicular direction), and may be referred to as the "up-down direction." The arrow Z is the direction in which the sliding portion 3 faces the pair of arms 2L and 2R, and may be referred to as the "front-rear direction." In the front-rear direction Z, the direction in which the sliding portion 3 is located relative to the pair of arms 2L and 2R may be referred to as the "forward Z1," and the opposite direction may be referred to as the "backward Z2."
[0015] As shown in Figures 1 and 2, the base 10 is configured in a flat plate shape including a left-right direction X and a front-rear direction Z. An arm support section 20 (described later), which is a part of the arm structure section 12, and a support structure section 14 are fixed to the upper surface of the base 10. In addition, a through-hole 10a (shown in Figure 1) is provided in the center of the base 10, through which a spring mounting section 32 (described later) provided on the slide section 3 is inserted. The through-hole 10a is circular in plan view and configured to penetrate the base 10.
[0016] 3 and 4, the arm structure 12 includes a left arm 2L and a right arm 2R (a pair of arms) capable of gripping an electric wire W, and an arm support 20 provided upright on the base 10 to support the pair of arms 2L, 2R. Hereinafter, the left arm 2L and the right arm 2R may be referred to as a "pair of arms 2L, 2R," the left arm main body 21L and the right arm main body 21R may be referred to as a "pair of arm main bodies 21L, 21R," and the left gripping portion 22L and right gripping portion 22R described below may be referred to as a "pair of gripping portions 22L, 22R."
[0017] The left arm portion 2L comprises a left arm main body 21L formed in a rectangular plate shape, and a left gripping portion 22L extending upward Y1 from the left arm main body 21L and having a claw portion (not shown) that clamps the electric wire W together with the right gripping portion 22R described below.
[0018] The right arm portion 2R comprises a right arm main body 21R formed in a rectangular plate shape, and a right gripping portion 22R extending upward Y1 from the right arm main body 21R and having a claw portion (not shown) that clamps the electric wire W together with the left gripping portion 22L.
[0019] The left arm portion 2L and the right arm portion 2R are arranged side by side in the left-right direction X so as to be inverted about a chuck center P (described later) as an axis. A pair of passive cam followers 5L and 5R (described later) are supported on the pair of arm bodies 21L and 21R at positions symmetrical to the left and right with respect to the chuck center P as an axis.
[0020] In this embodiment, as shown in Figs. 5 and 6, the left gripping portion 22L is provided at the end of the left arm main body 21L on the right arm portion 2R side (left-right direction X), and the right gripping portion 22R is provided at the end of the right arm main body 21R on the left arm portion 2L side (left-right direction X). As shown in Fig. 5, the left gripping portion 22L and the right gripping portion 22R are provided so as to be able to approach and separate about a virtual line P (hereinafter sometimes referred to as a chuck center P) that passes through a center 6P of an opening cam follower 6 described later and extends in the up-down direction Y. That is, the pair of arms 2L, 2R are provided so as to be displaceable (able to approach and separate) between a close position where they approach each other and can grip the electric wire W therebetween, and a separated position where they are separated from each other and release the electric wire W, with the chuck center P as the center.
[0021] 3 and 4, the arm support part 20 is provided in a plate shape standing on the upper surface of the base 10. This arm support part 20 includes a pair of arm guide recesses 23L, 23R that guide the left arm main body 21L and the right arm main body 21R in the approaching and separating directions, and an insertion part 24 that is provided in the center of the arm support part 20 in the left-right direction X and is formed by cutting out the upper end of the arm support part 20, and through which the pair of grip parts 22L, 22R are inserted.
[0022] The pair of arm guide recesses 23L, 23R are recessed into the front surface 20f of the arm support part 20. The pair of arm guide recesses 23L, 23R are arranged side by side in the left-right direction X and are continuous in the left-right direction X of the arm support part 20. Each arm guide recess 23L (23R) is also arranged to extend in the left-right direction X with a predetermined width in the up-down direction Y, and is configured by cutting out each edge of the arm support part 20 in the left-right direction X.
[0023] The arm guide recesses 23L, 23R are configured to have a rectangular bottom surface 230 and a pair of upper and lower opposing surfaces 231, 231 that are continuous with the upper and lower edges of the bottom surface 230 and face each other in the vertical direction Y. The bottom surface 230 of each arm guide recess 23L, 23R is located rearward Z2 from the front surface 20f of the arm support part 20 by a dimension equal to the thickness dimension of each arm main body 21L (21R). The dimension between the pair of upper and lower opposing surfaces 231, 231 in the arm guide recesses 23L, 23R is configured to be approximately the same as the vertical dimension of each arm main body 21L (21R).
[0024] In this arm support section 20, when each arm body 21L (21R) is accommodated in each arm guide recess 23L (23R), the back surface of each arm body 21L (21R) contacts the bottom surface 230 of each arm guide recess 23L (23R), and the upper and lower end surfaces of each arm body 21L (21R) contact the pair of upper and lower opposing surfaces 231, 231, respectively. At this time, the front surface 2f of each of the pair of arms 2L, 2R and the front surface 20f of the arm support section 20 are located on the same plane. In addition, when each arm body 21L (21R) is accommodated in each arm guide recess 23L (23R), the upper and lower end faces of each arm body 21L (21R) are brought into sliding contact with a pair of upper and lower opposing surfaces 231, 231 provided in the pair of arm guide recesses 23L, 23R, respectively, so that the pair of arm portions 2L, 2R are slidably guided in the left-right direction (direction of approaching and separating) X.
[0025] As shown in Figures 5 and 6, the cam structure 13 comprises a slide portion 3 that is erected on the base 10 and supported so as to be slidable in the vertical direction Y, a pair of left and right closing cam followers 4L, 4R (a pair of first bosses) rotatably supported on the slide portion 3, a pair of left and right passive cam followers 5L, 5R (a pair of second bosses) rotatably supported on the left arm portion 2L and the right arm portion 2R, respectively, and an opening cam follower 6 (third boss) rotatably supported on the slide portion 3 below Y2 of the pair of closing cam followers 4L, 4R.
[0026] 5 and 6, the slide section 3 includes a slide section main body 31 that is provided upright on the base 10 and supported by a support structure 14 described below so as to be slidable in the up-down direction Y, and a spring mounting section 32 that is formed extending downward Y2 from the slide section main body 31 and is inserted into a through-hole 10a provided in the base 10 and to which a coil spring 15 is attached. As shown in FIG. 5, the slide section 3 is positioned at an upper position 3U when the pair of arms 2L, 2R are in a separated position, and as shown in FIG. 6, the slide section 3 is positioned at a lower position 3D when the pair of arms 2L, 2R are in a close position. That is, the slide section 3 is configured to slide in the up-down direction Y between the lower position 3D and the upper position 3U.
[0027] As shown in FIG. 4, the slide portion main body 31 is provided in front Z1 of the pair of arms 2L, 2R, and is provided opposite the pair of arms 2L, 2R across the cam followers 4L, 4R, 5L, 5R, and 6 described below.
[0028] As shown in FIG. 6, the slide portion main body 31 is formed in a rectangular plate shape and includes an opening cam support portion 310 that supports an opening cam follower 6 described below, and a pair of closing cam support portions 311L, 311R that are provided above the opening cam support portion 310 in the left-right direction X and that support a pair of closing cam followers 4L, 4R described below, respectively.
[0029] As shown in Figure 6, the spring mounting portion 32 comprises a mounting portion main body 321 that is formed to extend cylindrically downward Y2 from the sliding portion main body 31 and into which the coil spring 15 is extrapolated, and a flange portion 322 that extends radially outward at the end of the mounting portion main body 321.
[0030] As shown in Figures 5 and 6, the pair of closing cam followers 4L, 4R are formed in a cylindrical (or columnar) shape and are arranged side by side in the left-right direction X. Each closing cam follower 4L, 4R is configured to have a peripheral surface with a predetermined curvature with the front-rear direction Z as the central axis, and is supported rotatably with respect to each closing cam support portion 311L, 311R. In this embodiment, the pair of closing cam followers 4L, 4R are configured to have the same outer diameter dimension.
[0031] One of the pair of closing cam followers 4L, 4R (may be referred to as left closing cam follower 4L) is provided so as to protrude rearward Z2 from one of the pair of closing cam support portions 311L, 311R (may be referred to as left closing cam support portion 311L). The other of the pair of closing cam followers 4L, 4R (may be referred to as right closing cam follower 4R) is provided so as to protrude rearward Z2 from the other of the pair of closing cam support portions 311L, 311R (may be referred to as right closing cam support portion 311R).
[0032] As shown in Figs. 5 and 6, the pair of passive cam followers 5L, 5R are formed in a cylindrical (or columnar) shape, arranged side by side in the left-right direction X, and arranged at positions symmetrical with respect to the chuck center P. Each passive cam follower 5L, 5R is configured to have a peripheral surface with a predetermined curvature with the front-rear direction Z as the central axis, and is supported rotatably with respect to each arm main body 21L, 21R. In this embodiment, the pair of passive cam followers 5L, 5R are configured to have the same outer diameter. The passive cam followers 5L, 5R are configured to have an outer diameter slightly smaller than the outer diameter of each closing cam follower 4L, 4R.
[0033] One of the pair of passive cam followers 5L, 5R (sometimes referred to as the left passive cam follower 5L) is provided so as to protrude forward Z1 from the left arm main body 21L of the left arm section 2L. The other of the pair of passive cam followers 5L, 5R (sometimes referred to as the right passive cam follower 5R) is provided so as to protrude forward Z1 from the right arm main body 21R of the right arm section 2R.
[0034] The opening cam follower 6 is formed in a cylindrical (or columnar) shape and is provided so as to protrude rearward Z2 from the opening cam support portion 310. The opening cam follower 6 is configured to have a peripheral surface with a predetermined curvature with the front-rear direction Z as its central axis, and is supported rotatably relative to the opening cam support portion 310. The opening cam follower 6 is positioned below Y2 between the pair of closing cam followers 4L, 4R while being supported by the opening cam support portion 310.
[0035] In such a cam structure 13, the positional relationship between the pair of closing cam followers 4L, 4R, the pair of passive cam followers 5L, 5R, and the opening cam follower 6 is such that, from the top, the pair of closing cam followers 4L, 4R, the pair of passive cam followers 5L, 5R, and the opening cam follower 6 are shifted in position in this order as shown in Figures 5 and 6. Furthermore, the pair of closing cam followers 4L, 4R are provided above the pair of passive cam followers 5L, 5R and outward in the left-right direction X.
[0036] 5 and 6, the left closing cam follower 4L and the left passive cam follower 5L have peripheral surfaces that can slide against each other and are provided at positions where they can come into contact with each other, and the right closing cam follower 4R and the right passive cam follower 5R have peripheral surfaces that can slide against each other and are provided at positions where they can come into contact with each other. Also, the left passive cam follower 5L and the right passive cam follower 5R have peripheral surfaces that can slide against the opening cam follower 6 and are provided at positions where they can come into contact with the opening cam follower 6.
[0037] As shown in Figures 3 and 4, the support structure 14 includes a pair of first guide portions 141L, 141R located on both sides of the slide portion 3 in the left-right direction X and guiding the slide portion 3 in the up-down direction Y, and a second guide portion 142 located in the front X1 of the slide portion 3 and guiding the slide portion 3 in the up-down direction Y.
[0038] As shown in Figures 3 and 4, the pair of first guide portions 141L, 141R each have a first guide surface 141a that is erected in a rectangular column shape on the base 10 and is composed of inner surfaces facing each other, and a second guide surface 141b that is continuous with the first guide surface 141a and is composed of the rear Z2 side surface (rear surface) of each of the first guide portions 141L, 141R.
[0039] Each of the first guide surfaces 141a is formed of a plane including the front-rear direction Z and the up-down direction Y, and is provided facing a side surface 3a in the left-right direction X of the opening cam support portion 310 of the sliding portion 3. The distance between the pair of first guide surfaces 141a in the left-right direction X is configured to be approximately the same as the dimension of the opening cam support portion 310 in the left-right direction X, and each of the first guide surfaces 141a is provided in contact with each of the side surfaces 3a of the opening cam support portion 310. The side surfaces 3a of the opening cam support portion 310 are brought into sliding contact with each of the first guide surfaces 141a, so that the sliding portion 3 is slidably guided in the up-down direction Y.
[0040] The second guide surface 141b is formed of a plane including the up-down direction Y and the left-right direction X, and is provided at a position facing the front surface 20f of the arm support part 20. The second guide surface 141b is also provided at a position capable of contacting the front surface 20f of the arm support part 20, and is configured to prevent each arm main body 21L (21R) from falling off each arm guide recess 23L (23R).
[0041] As shown in Figures 3 and 4, the second guide portion 142 is erected on the base 10 and comprises a plate-shaped opposing plate portion 143 facing the forward direction Z1 of the slide portion 3, and an extension plate portion 144 formed by extending from the upper end of the opposing plate portion 143 toward the arm structure portion 12.
[0042] As shown in Figures 3 and 4, the extension plate portion 144 is configured in a plate shape extending in the front-rear direction Z and the left-right direction X, and is provided with a guide tip surface 144a formed from its tip surface and a step guide 145 provided on its side surface.
[0043] The guide tip surface 144a is formed of a plane including the up-down direction Y and the left-right direction X. This guide tip surface 144a is provided opposite to a position capable of contacting the front surface 2f of each arm main body 21L (21R), and is configured to prevent each arm main body 21L (21R) from falling off each arm guide recess 23L (23R).
[0044] As shown in FIGS. 3 and 4, the step guide 145 includes a guide side surface 145a formed from the side surface of the extending plate portion 144, and a guide rising surface 145b rising from the front end of the guide side surface 145a.
[0045] The guide side surface 145a is configured as a plane including the front-rear direction Z and the up-down direction Y. The guide side surface 145a is provided at a position opposite to the inner surfaces of the pair of closing cam support portions 311L and 311R of the sliding portion 3 so as to be able to come into contact with them.
[0046] The guide rising surface 145b is configured as a plane including the left-right direction X and the up-down direction Y. The guide rising surface 145b is provided at a position facing the front surfaces of the pair of closing cam support portions 311L and 311R of the sliding portion 3 so as to be able to come into contact with them.
[0047] As shown in Figure 1, this type of step guide 145 has the inner surface of each closing cam support portion 311L (311R) sliding against the guide side surface 145a and the front surface of each closing cam support portion 311L (311R) sliding against the guide raised surface 145b, so that the sliding portion 3 is guided in the vertical direction Y by the step guide 145.
[0048] 6, the coil spring 15 is mounted on a spring mounting portion 32 provided on the sliding portion 3. When the coil spring 15 is mounted on the spring mounting portion 32, the coil spring 15 is fitted onto the mounting portion main body 321, with the upper end 15a abutting against the lower surface of the base 10 and the lower end 15b abutting against the flange portion 322. The coil spring 15 is in a compressed state when the pair of arms 2L, 2R are in the close position, and is further compressed as the sliding portion 3 is slid upward Y1, thereby maintaining the pair of arms 2L, 2R in the close position.
[0049] Next, the operation of the pair of arms 2L, 2R of the electric wire chuck mechanism 1, which moves from the separated position to the close position, will be described with reference to FIGS.
[0050] As shown in Fig. 5, when the pair of arms 2L, 2R are in the separated position, the pair of closing cam followers 4L, 4R are provided above the pair of passive cam followers 5L, 5R in the Y1 direction and outwardly shifted in the left-right direction X. The left closing cam follower 4L is provided slightly spaced from the left passive cam follower 5L, and the right closing cam follower 4R is provided slightly spaced from the right passive cam follower 5R. The opening cam follower 6 is provided in contact with the pair of passive cam followers 5L, 5R.
[0051] From this state, the slide portion 3 is slid downward Y2 (one of the orthogonal directions). As the slide advances, the pair of closing cam followers 4L, 4R are moved downward Y2 together with the slide portion 3, and the pair of closing cam followers 4L, 4R come into contact with the pair of passive cam followers 5L, 5R, and the pair of closing cam followers 4L, 4R press the pair of passive cam followers 5L, 5R in a direction in which they approach each other. At this time, the pair of closing cam followers 4L, 4R are rotated while contacting the pair of passive cam followers 5L, 5R.
[0052] As the slide advances further, the pair of passive cam followers 5L, 5R are pushed by the pair of closing cam followers 4L, 4R, and the pair of passive cam followers 5L, 5R move in directions approaching each other.
[0053] At this time, each side surface 3a in the left-right direction X of the opening cam support portion 310 of the sliding portion 3 is in sliding contact with each first guide surface 141a of each first guide portion 141L (141R), the inner surfaces of the pair of closing cam support portions 311L, 311R of the sliding portion 3 are in sliding contact with the guide side surface 145a, and the front surfaces of each closing cam support portion 311L (311R) of the sliding portion 3 are in sliding contact with the guide upright surface 145b. This causes the sliding portion 3 to be slidably guided in the up-down direction Y. As the sliding proceeds further, the sliding portion 3 reaches a lower position 3D as shown in FIG. 6.
[0054] Accordingly, the upper and lower end faces of each arm body 21L (21R) of the pair of arms 2L, 2R are brought into sliding contact with the pair of upper and lower opposing surfaces 231, 231 provided on the pair of arm guide recesses 23L, 23R, respectively. As a result, the pair of arms 2L, 2R are slidably guided in the left-right direction (direction of approaching and separating) X, and the pair of arms 2L, 2R shown in FIG. 6 reach the close position.
[0055] In this manner, the pair of arms 2L, 2R are displaced from the separated position to the close position, and the pair of arms 2L, 2R shown in FIG. 6 are positioned at the close position.
[0056] Next, the operation of the pair of arms 2L, 2R in the electric wire chuck mechanism 1 to move from the close position to the separate position will be described with reference to FIGS.
[0057] 6, when the pair of arms 2L, 2R are in the close position, the pair of closing cam followers 4L, 4R are provided above the pair of passive cam followers 5L, 5R in a position Y1 and outwardly shifted in the left-right direction X. The left closing cam follower 4L abuts against the left passive cam follower 5L, the right closing cam follower 4R abuts against the right passive cam follower 5R, and the opening cam follower 6 is provided below the pair of passive cam followers 5L, 5R in a position Y2 not in contact with the passive cam followers 5L, 5R.
[0058] From this state, the sliding portion 3 is slid upward Y1 (the other orthogonal direction) against the biasing force of the coil spring 15. As the sliding progresses, the opening cam follower 6 moves upward Y1 together with the sliding portion 3, and the opening cam follower 6 comes into contact with the pair of passive cam followers 5L, 5R and enters between the pair of passive cam followers 5L, 5R. At this time, the opening cam follower 6 comes into contact with the pair of passive cam followers 5L, 5R and each of them is rotated.
[0059] As the slide advances further, the pair of passive cam followers 5L, 5R are pushed by the opening cam follower 6, and the pair of passive cam followers 5L, 5R move in directions away from each other.
[0060] At this time, each side surface 3a of the opening cam support portion 310 of the sliding portion 3 is in sliding contact with the first guide surface 141a of each first guide portion 141L (141R), the inner surfaces of the pair of closing cam support portions 311L, 311R of the sliding portion 3 are in sliding contact with the guide side surface 145a of the step guide 145, and the front surfaces of each closing cam support portion 311L (311R) of the sliding portion 3 are in sliding contact with the guide upright surface 145b. This causes the sliding portion 3 to be slidably guided in the vertical direction Y. As the sliding proceeds further, the sliding portion 3 reaches an upper position 3U as shown in FIG. 5.
[0061] Accordingly, the upper and lower end faces of each arm body 21L (21R) of the pair of arms 2L, 2R are brought into sliding contact with the pair of upper and lower opposing surfaces 231, 231 provided on the pair of arm guide recesses 23L, 23R, respectively. As a result, the pair of arms 2L, 2R are slidably guided in the left-right direction (direction of approaching and separating) X, and the pair of arms 2L, 2R reach the separated position.
[0062] In this manner, the pair of arms 2L, 2R are displaced from the close position to the separate position, and the pair of arms 2L, 2R shown in FIG. 5 are positioned at the separate position.
[0063] According to the above-mentioned embodiment, the electric wire chuck mechanism 1 can realize a configuration in which the pair of arms 2L, 2R are brought close to each other by the cam structure 13 having the slide portion 3 without using a pair of L-shaped swinging parts in the conventional technology, and the electric wire W is gripped. That is, by omitting the pair of L-shaped swinging parts in the conventional technology, it is possible to reduce the manufacturing cost as a simple configuration, and by linearly moving the pair of arms 2L, 2R, it is easy to adjust the movement amount of the pair of arms 2L, 2R with respect to the chuck center P, and it is possible to realize the desired alignability. In this embodiment, the "alignability" refers to a state in which the center (chuck center P) of the claw parts provided on the left arm 2L and the right arm 2R coincides with the central axis of the gripped electric wire W.
[0064] Also, a coil spring 15 (biasing means) is provided, and the sliding portion 3 is biased downward Y2 (one of the orthogonal directions) by the coil spring 15. This maintains the pair of arms 2L, 2R in a state where they are close to each other, i.e., the electric wire W is held between the pair of arms 2L, 2R, and prevents the electric wire W from falling off.
[0065] The pair of arms 2L, 2R are configured to move toward and away from each other about an imaginary line P that passes through the center 6P of the opening cam follower 6 (third boss) and extends in the vertical direction Y. This allows for a simple configuration that reduces manufacturing costs while achieving the desired alignment.
[0066] In the embodiment, the pair of closing cam followers 4L, 4R (pair of first bosses) and the opening cam follower 6 (third boss) are rotatably provided with respect to the slide portion 3, and the pair of passive cam followers 5L, 5R (pair of second bosses) are rotatably provided with respect to the pair of arms 3L, 3R. As a result, when the pair of arms 2L, 2R are displaced, the closing cam followers 4L, 4R, the passive cam followers 5L, 5R, and the opening cam follower 6 each rotate, thereby reducing friction generated between them. As a result, the pair of arms 2L, 2R can be displaced with good movability.
[0067] It should be noted that the present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and the following modified examples are also included in the present invention.
[0068] In the above embodiment, the pair of closing cam followers 4L, 4R and the opening cam follower 6 are rotatably provided with respect to the slide portion 3, and the pair of passive cam followers 5L, 5R are rotatably provided with respect to the slide portion 3, but the present invention is not limited to this. It is sufficient that at least one of the pair of closing cam followers 4L, 4R, the pair of passive cam followers 5L, 5R, and the opening cam follower 6 is configured to be rotatable. In this case, although the friction generated between them increases and the mobility is somewhat inferior compared to the above embodiment, a configuration in which the pair of arms 2L, 2R are displaced can be realized.
[0069] In the above embodiment, the pair of closing cam followers 4L, 4R are configured to have the same outer diameter dimension, and the pair of passive cam followers 5L, 5R are configured to have the same outer diameter dimension, but the present invention is not limited to this. As shown in FIG. 7, among the pair of closing cam followers 14L, 4R (pair of first bosses), the left closing cam follower 14L (one of the pair of first bosses) may have an outer diameter dimension smaller than that of the right closing cam follower 4R (the other), and among the pair of passive cam followers 15L, 5R (pair of second bosses), the left passive cam follower 15L (one of the pair of second bosses) may have an outer diameter dimension smaller than that of the right passive cam follower 5R (the other of the pair of second bosses). The left passive cam follower 15L may be provided at a position shifted downward Y2 from the right passive cam follower 5R. 7, the cam structure 13A in the electric wire chuck mechanism 1A includes a slide portion 3, a pair of left and right closing cam followers 14L, 4R (a pair of first bosses), a pair of left and right passive cam followers 15L, 5R (a pair of second bosses), and an opening cam follower 6 (a third boss). In such an electric wire chuck mechanism 1A, the chuck center PA may be configured to be at a position offset with respect to the imaginary line P.
[0070] According to this, the amount of displacement of the left arm 2L accompanying the sliding of the sliding portion 3 becomes smaller than the amount of displacement of the right arm 2R. That is, by changing the diameter dimensions of the closing cam followers 14L, 4R and the passive cam followers 15L, 5R to appropriate dimensions, or by setting the positions of the closing cam followers 14L, 4R and the passive cam followers 15L, 5R to appropriate positions, the amount of displacement of the pair of arms 2L, 2R can be adjusted, and the position of the chuck center PA (the closing position of the pair of arms 2L, 2R) can be easily changed. This improves the degree of freedom in designing the electric wire chuck mechanism 1A.
[0071] In the above embodiment, the slide body 31 is biased downward Y2 by the coil spring 15 (biasing means) to maintain the pair of arms 2L, 2R in a close position, but the present invention is not limited to this. The slide body 31 may be biased upward Y1 by the biasing means. In this case, the biasing force of the biasing means allows the pair of arms 2L, 2R to move away from each other smoothly.
[0072] Second embodiment A second embodiment of the present invention will be described below with reference to Figs. 8 and 9. Fig. 8 is a conceptual diagram showing an electric wire chuck mechanism 1B according to a second embodiment of the present invention, illustrating a state in which a pair of arms 102L, 102R are close to each other. Fig. 9 is a diagram illustrating a state in which a pair of arms 102L, 102R are separated from each other. The electric wire chuck mechanism 1B of the second embodiment and the electric wire chuck mechanism 1 of the first embodiment differ in the configuration of the pair of arms 102L (2L), 102R (2R). In the following, in the second embodiment, parts having the same configuration as those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.
[0073] The wire chuck mechanism 1B of the present embodiment includes a base 10, an arm structure 12 upright on the base 10 and having a left arm 102L and a right arm 102R (a pair of arms) configured to be movable toward and away from each other in a left-right direction X and capable of gripping an electric wire W, a cam structure 13 having a slide portion 3 that brings the pair of arms 2L, 2R toward and away from each other by sliding in a vertical direction Y (orthogonal direction), a support structure 14 that supports the arm structure 12 and the cam structure 13, and a coil spring 15 (biasing means) that urges the slide portion 3 downward Y2 (one of the orthogonal directions) to maintain the electric wire W in a gripped state.
[0074] The left arm portion 102L comprises a left arm main body 121L formed in a rectangular plate shape, and a left gripping portion 122L extending upward Y1 from the left arm main body 121L and having a claw portion (not shown) that clamps the electric wire W together with a right gripping portion 122R described later.
[0075] The left arm main body 121L is provided with a left extension 123L extending toward the right arm main body 121R. This left extension 123L is a portion of the left arm main body 121L that protrudes from the left grip 122L toward the right arm main body 121R. A left passive cam follower 5L is rotatably supported by the left extension 123L.
[0076] The left grip portion 122L is provided at an end of the left arm main body 121L away from the right arm main body 121R, which will be described later.
[0077] The right arm portion 102R comprises a right arm main body 121R formed in a rectangular plate shape, and a right gripping portion 122R extending upward Y1 from the right arm main body 121R and having a claw portion (not shown) that clamps the electric wire W together with the left gripping portion 122L.
[0078] The right arm body 121R is provided with an accommodation space 123R capable of accommodating the left extension portion 123L. The accommodation space 123R is formed by cutting out a lower corner of the right arm body 121R on the left arm body 121L side. The right grip portion 122R is provided at the end of the right arm body 121R on the left arm body 121L side. A right passive cam follower 5R is rotatably supported on the right arm body 121R.
[0079] 8 and 9, in the electric wire chuck mechanism 1B, the left gripping portion 122L and the right gripping portion 122R are configured to move toward and away from each other about a chuck center PB that is offset from the imaginary line P. This provides substantially the same effects as the electric wire chuck mechanism 1 of the first embodiment.
[0080] Furthermore, for example, when manufacturing a twisted pair cable having a pair of electric wires W, as shown in Fig. 10, a pair of electric wire chuck mechanisms 1B, 1B' of the second embodiment may be provided and arranged side by side in the left-right direction X so as to be inverted with respect to each other, with the space between the pair of electric wire chuck mechanisms 1B, 1B' as an axis. This allows the pair of electric wires W, W to be gripped in a state in which they are closer to each other than when the electric wire chuck mechanisms 1 of the first embodiment are arranged side by side.
[0081] In addition, the best configurations and methods for implementing the present invention are disclosed in the above description, but the present invention is not limited thereto. That is, the present invention has been mainly illustrated and described with reference to specific embodiments, but those skilled in the art can make various modifications to the above-described embodiments in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical idea and purpose of the present invention. Therefore, the descriptions limiting the shapes, materials, etc. disclosed above are illustrative descriptions for the purpose of facilitating understanding of the present invention, and do not limit the present invention, and therefore descriptions of the names of components that are free of some or all of the limitations on the shapes, materials, etc. are included in the present invention. [Explanation of symbols]
[0082] 1, 1A, 1B, 1B´ Wire chuck mechanism 2L(102L), 2R(102R) pair of arms 3 Slide section 4L (14L), 4R Pair of closing cam followers (pair of first bosses) 5L (15L), 5R Pair of passive cam followers (pair of second bosses) 6 Release cam follower (third boss) 15 Coil spring (biasing means) P Virtual line W electric wire X Left / Right direction (direction in which the pair of arms are lined up) Y Up / Down direction (orthogonal direction)
Claims
1. An electric wire chuck mechanism having a pair of arms for gripping an electric wire, the pair of arms being brought close to each other to grip the electric wire, a sliding portion provided opposite the pair of arms and slidable in an orthogonal direction perpendicular to the direction in which the pair of arms are arranged; a pair of first bosses protruding from the slide portion toward the pair of arm portions and arranged side by side in the arranging direction on the slide portion; A pair of second bosses protruding from each of the pair of arm portions toward the slide portion; a third boss that protrudes from the slide portion toward the pair of arm portions and can enter between the pair of second bosses as the slide portion slides, the pair of first bosses, the pair of second bosses, and the third boss are provided in this order with positions shifted in the perpendicular direction; the pair of second bosses are located at positions capable of contacting the pair of first bosses and the pair of third bosses, As the slide portion is slid in one of the orthogonal directions, the pair of first bosses are moved to the one of the orthogonal directions, each of the first bosses comes into contact with each of the second bosses, and each of the first bosses is pushed by each of the second bosses, causing the pair of second bosses to approach each other, thereby displacing the pair of arm portions in the approaching direction; a wire chuck mechanism configured to: as the sliding portion is slid in the other of the perpendicular directions, the third boss is moved in the other direction, the third boss abuts against each of the second bosses, the third boss enters between the pair of second bosses, and the third boss pushes the pair of second bosses, moving the pair of second bosses away from each other, thereby displacing the pair of arm portions in the direction away from each other.
2. A biasing means is provided.
2. The electric wire chuck mechanism according to claim 1, wherein the sliding portion is biased in one of the orthogonal directions by the biasing means.
3. The third boss is provided in a cylindrical or columnar shape, 3. The wire chuck mechanism according to claim 1, wherein the pair of arms are configured to move toward and away from each other about a virtual line that passes through a center of the third boss and extends in the perpendicular direction.
4. The third boss is provided in a cylindrical or columnar shape, 3. The wire chuck mechanism according to claim 1, wherein the pair of arms are configured to move toward and away from each other about a position that is offset from an imaginary line that passes through a center of the third boss and extends in the perpendicular direction.
5. one of the pair of first bosses and one of the pair of second bosses are located at positions capable of contacting each other, the pair of first bosses are each provided in a cylindrical or columnar shape, and one of the pair of first bosses is formed to have a smaller diameter dimension than the other, 5. The wire chuck mechanism according to claim 4, wherein each of the pair of second bosses is formed in a cylindrical or columnar shape, and one of the pair of second bosses is formed to have a smaller diameter dimension than the other.
6. 3. The wire chuck mechanism according to claim 1, wherein at least one of the pair of first bosses, the pair of second bosses, and the third boss is configured to be rotatable.
Citation Information
Patent Citations
Electric wire chuck pallet for automatic closed terminal working machine
JP1995161445A