JP4986668B2 - Surface mount equipment - Google Patents

Description

  The present invention relates to a surface mounting apparatus for mounting electronic components or the like on a printed circuit board or the like, and more particularly to a surface mounting apparatus capable of preventing a cable bear (registered trademark) from being lifted upward during acceleration / deceleration of a head unit.

  In surface mount devices, there is an increasing demand for improving the mounting speed of components, and there is also a demand for downsizing the devices.

  In order to improve the mounting speed of components, it is necessary to increase the speed of the head for picking and mounting the components. For this purpose, it is necessary to increase the acceleration of the head during acceleration / deceleration.

  On the other hand, the head unit of the surface mounting device is provided with a head for picking and mounting components. However, for this moving unit such as an industrial robot that moves on a certain track, a power supply line or signal is used. A cable bear (registered trademark) is generally used in order to ensure the connection of the line and not to disturb the movement.

  FIG. 1 is a perspective view showing components related to a head unit of a conventional surface mounting apparatus 100 and its moving mechanism.

  In FIG. 1, for example, a head unit 102 including a plurality of heads is supported by a linear motion guide 104 </ b> A of an X-direction moving mechanism 104 so as to be movable in the horizontal plane. The X-direction moving mechanism 104 is supported by a Y-direction moving mechanism 106 so as to be movable in the Y direction within a horizontal plane. As a result, the head unit 102 can be moved in the XY direction in the horizontal plane by the X direction moving mechanism 104 and the Y direction moving mechanism 106. The X direction and the Y direction are directions orthogonal to each other.

  A cable 108 including a power supply line and a signal line is connected to the head unit 102. The cable 108 passes through the cable bear 110, and even if the head unit 102 moves in the X direction in the horizontal plane along the linear motion guide 104A, the cable 108 is not damaged or entangled. In addition, the cable 108 does not hinder the movement of the head unit 102.

  The cable bearer 110 serves to prevent the cable 108 from hindering the movement of the head unit 102 while holding and protecting the cable 108 connected to the head unit 102 inside. The cable bearer 110 has a moving end 110 </ b> A that is one end thereof fixed to a moving end support member 102 </ b> A that is a component of the head unit 102, and a fixed end 110 </ b> B that is the other end is provided in parallel with the X-direction moving mechanism 104. It is fixed to the member 112. When the head unit 102 moves in the X direction along the linear guide 104A in the horizontal plane, the cable bear 110 moves along the support member 112 on the support member 112 while moving the bent portion. The support member 112 is fixed to the X-direction moving mechanism 104 and is disposed in parallel with the linear motion guide 104A.

  FIG. 2 is a side view of the cable bearer 110. The height H from the upper surface of the support member 112 to the upper surface of the moving end 110A of the cable bearer 110 is a bent portion when the cable bearer 110 is bent to the maximum. The height is twice the outer radius of curvature R. The fixed end 110 </ b> B of the cable bear 110 is fixed to the support member 112.

  In addition, the technique regarding a cable bear is described in patent documents 1-11, for example.

JP-A 63-3610 Japanese Utility Model Publication No. 5-45291 JP-A-7-52078 JP-A-9-137882 JP 9-326571 A Japanese Patent Laid-Open No. 11-82816 JP-A-11-122790 Japanese Patent Laid-Open No. 11-123691 JP 2002-151898 A JP 2002-185191 A JP 2003-13446 A

  The parts related to the head unit and the moving mechanism of the conventional surface mounting apparatus are configured as described above, but there are the following problems.

(1) When the head unit 102 is accelerated and moved from a lower right side to an upper left side (right to left in FIG. 2) by a driving source (not shown) in FIG. Lifted upward as shown. Further, when the head unit 102 decelerates and stops, forces are applied to the joint portions 110C of the cable bear 110 in the compression direction. As a result, each joint 110C is lifted further upward due to inertial force to overtake each from above, and there is a problem that a large space must be secured in the ceiling portion of the surface mount device. . Further, the lift amount increases with the progress of wear of each joint portion 110C of the cable bear 110, and thus the lift amount becomes larger as the use period of the surface mount device becomes longer.

  For this reason, in order to avoid the danger that the cable bearer 110 collides with the housing or ceiling cover of the surface mount device 100, it is necessary to replace the cable bearer 110 in a short period of time.

  Further, if the design is made in consideration of the fact that the amount by which the cable bearer 110 is lifted upward during acceleration / deceleration increases with wear of the cable bearer 110, the apparatus cannot be downsized.

(2) When the head unit 102 moves from the upper left to the lower right (from left to right in FIG. 2) in FIG. 1, the joint portions 110 </ b> C of the bent portion of the cable bear 110 are aligned while colliding with the support member 112. However, at this time, an impact sound or vibration was generated, which was uncomfortable for the user. In addition, since the impact sound and vibration increase with the progress of wear, they become larger as the usage period of the surface mount device becomes longer.

(3) When the X-direction moving mechanism 104 is moved in the Y direction by the Y-direction moving mechanism 106, the Y-direction inertial force received by the cable bear 110 due to acceleration / deceleration is concentrated at two locations, the moving end 110A and the fixed end 110B. Therefore, the wear of this portion is extremely severe, which causes the replacement time of the cable bear 110 to be advanced.

  Although the technique regarding a cable bear is described in patent documents 1-11, for example, it is not enough in order to solve the problems (1)-(3).

  The present invention has been made in view of such problems, and an object of the present invention is to provide a surface mount device that can hold a cable bear in a predetermined space even during acceleration / deceleration accompanying the movement of the cable bear. . It is another object of the present invention to provide a surface mount device that can suppress the generation of impact sound and vibration associated with the movement of the cable bear, and a surface mount device that can prevent wear from progressing only at specific joint portions of the cable bear. .

A surface mounting apparatus according to the present invention includes a head unit including a head that holds components and mounts on a substrate, a cable connected to the head unit, and a cable that holds the cable on the inner side along a straight path. In a surface mount device having a cable bear that is reciprocated in the horizontal direction and bent so as to protrude in the horizontal direction , and a linear support member that supports the cable bear from below , both ends of the cable bear are moved. A holding member that includes an upper end that is an end and a lower end that is a fixed end, the position of which can be adjusted in the vertical direction, and the cable bear is prevented from being lifted upward when the cable bear is moved. provided above the cable carrier, presser members are not connected to the said cable track, the presser members each joint of the cable carrier is the upper side of the cable track end By preventing located above the one in which has solved the above problems.

  Moreover, it is preferable to provide a vibration isolating material between the pressing member and the cable bear, and to provide a vibration isolating material between the linear support member and the cable bear.

  Furthermore, it is preferable to provide a guide for restricting movement of the cable bear in a direction orthogonal to the longitudinal direction of the linear support member on both sides of the pressing member and both sides of the linear support member. .

  According to the surface mount device of the present invention, since the holding member capable of adjusting the position in the vertical direction is provided, the cable bear can be prevented from being lifted upward when the cable bear is moved even if the wear of the cable bear progresses. Moreover, the phenomenon that the wear of the joint portion of the cable bear is further advanced by the cable bear being lifted upward can be suppressed.

  For this reason, it is possible to reduce the size of the surface mount device, and it is not necessary to replace the cable bear with a new one in a short period of time.

  In addition, when a vibration isolating material is provided between the presser member and the cable bear, and when a vibration isolating material is provided between the linear support member and the cable bear, an impact sound or vibration during movement of the cable bear is generated. Generation can be suppressed. In addition, the frictional force between the cable bear and the vibration isolator can bear part of the inertial force that acts on the cable bear when the head unit moves in the direction perpendicular to the linear support member. It can also be suppressed that wear of a specific joint of the bear is concentrated.

  Further, when guides for restricting the movement of the cable bear in the direction perpendicular to the longitudinal direction of the linear support member are provided on both sides of the presser member and both sides of the linear support member, the head unit The guide can bear a part of the inertial force acting on the cable bear when moving in a direction perpendicular to the linear support member, and wear of a specific joint of the cable bear can be concentrated. Can be suppressed.

  Hereinafter, a surface mounting apparatus 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. However, the same components as those of the conventional surface mounting apparatus 100 are denoted by the same reference numerals and description thereof is omitted. .

  4 and 5 are perspective views showing components related to the head unit and its moving mechanism of the surface mounting apparatus 10 according to the embodiment of the present invention, and FIG. 4 is a case where the head unit 102 is located at the left end. FIG. 5 shows a case where the head unit 102 is located at the right end.

  6 is a view of the cable bearer 110 viewed from the side when the head unit 102 is located at the left end, and FIG. 7 is a diagram when the head unit 102 is located near the middle of the X-direction moving mechanism 104. FIG. 8 is a view of the cable bearer 110 viewed from the side when the head unit 102 is located at the right end. 9 is a cross-sectional view taken along line AA in FIG.

  The surface mounting apparatus 10 according to the embodiment of the present invention includes (1) a point where the pressing member 12 and the lateral guide member 14 are provided, and (2) a support member 16 having a U-shaped cross section (see FIG. 9). The point provided in place of the support member 112, (3) The point that the vibration isolator 18 is provided between the holding member 12 and the cable bear 110, and the vibration isolator 20 is provided between the support member 16 and the cable bear 110. This is the main difference from the conventional surface mounting apparatus 100 shown in FIG.

Pressing member 12, the cable bearer 110 is responsible for regulating so as not et lifted up during acceleration and deceleration. The holding member 12 is connected to the moving end support member 102A by a stepped screw 12A and a screw 12B. Since the screw 12A is a stepped screw and the screw 12B passes through the long hole 12C, the screw 12B can be loosened and adjusted in the rotational direction using the stepped screw 12A as a fulcrum. After adjusting in the rotation direction, the presser member 12 can be fixed by tightening the screw 12B. The position of the pressing member 12 is set such that the vibration isolator 18 (see FIG. 9) slightly contacts the cable bear 110.

  As described above, when the head unit 102 is accelerated and moved from the lower right side to the upper left side in FIG. 1 (from right to left in FIG. 2) by a driving source (not shown), the bent portion of the cable bear 110 is caused by centrifugal force. As shown in FIG. Further, when the head unit 102 decelerates and stops, forces are applied to the joint portions 110C of the cable bear 110 in the compression direction. As a result, each joint part 110C is lifted further upward by an inertial force that attempts to overtake each joint part from above.

In contrast, the pressing member 12 is received upward force exerted on the cable carrier 110 by the centrifugal force during acceleration, the cable bearer 110 is regulated so as not et lifted upward. For this reason, since the holding member 12 prevents each joint part 110C from being positioned above the moving end 110A, it can also prevent each joint part 110C from being lifted further upward by an inertial force during deceleration.

  As shown in FIG. 9, the lateral guide member 14 includes a top plate 14A and a side plate 14B. The side plate 14B extends downward from both sides of the top plate 14A, and the lateral cross section of the lateral guide member 14 has an opening. It has a wide U shape. The lateral guide member 14 is fixed to the lower surface of the presser member 12. The lateral guide member 14 plays a role of receiving the inertia force in the Y direction generated in the cable bear 110 when the X direction moving mechanism 104 is accelerated and decelerated in the Y direction by the Y direction moving mechanism 106, and the side plate 14 </ b> B of the lateral guide member 14 is It becomes a guide for restricting the movement of the cable bear 110 in the Y direction. For this reason, by providing the lateral guide member 14, it is possible to prevent the inertia force in the Y direction generated in the cable bear 110 from being concentrated on the moving end 110A and the fixed end 110B, and the moving end 110A and the fixed end 110B. It is possible to prevent the wear of the joint portion 110C from proceeding intensively.

  The vibration isolator 18 is provided between the top plate 14 </ b> A of the lateral guide member 14 fixed to the lower surface of the presser member 12 and the cable bearer 110, and the cable bearer 110 moves as the head unit 102 moves in the X direction. It absorbs the impact when moving and collides with the presser member 12, and plays a role of reducing the generation of impact sound and vibration. For this reason, when the head unit 102 accelerates from a lower right side to an upper left side in FIGS. 4 and 5 (from right to left in FIGS. 6 to 8) by a driving source (not shown), the presser member 12 moves the cable bear 110 up. Even if pressed from the direction, by providing the vibration isolator 18, the generation of impact sound and vibration accompanying the movement of the cable bear 110 is reduced. As the vibration isolator 18, it is preferable to use rubber or the like having high vibration absorption in that it can effectively reduce the generation of impact sound and vibration.

  As shown in FIGS. 4, 5, and 9, the support member 16 is a linear member composed of a bottom plate 16 </ b> A and a side plate 16 </ b> B, and the side plate 16 </ b> B extends upward from both sides of the bottom plate 16 </ b> A. The surface is U-shaped. The support member 16 is fixed to the X-direction moving mechanism 104 so that the longitudinal direction thereof is parallel to the X direction, and plays a role of supporting the cable bearer 110 moving in the X direction from below. Further, the support member 16 plays a role of receiving the inertia force in the Y direction generated in the cable bear 110 when the X direction moving mechanism 104 is accelerated and decelerated in the Y direction by the Y direction moving mechanism 106, and the side plate 16B of the support member 16 is It becomes a guide for restricting the movement of the cable bear 110 in the Y direction. The conventional support member 112 does not have the side plate 16B, and by providing the support member 16 instead of the conventional support member 112, the Y-direction inertia force generated in the cable bear 110 is concentrated on the moving end 110A and the fixed end 110B. It is possible to prevent the wear, and wear of the joint portion 110C of the moving end 110A and the fixed end 110B can be prevented from intensively progressing.

  The vibration isolator 20 is provided between the bottom plate 16A of the support member 16 and the cable bearer 110, and absorbs an impact when the head unit 102 moves in the X direction and the cable bearer 110 moves. And play a role in reducing the occurrence of vibration. For this reason, when the head unit 102 is moved from the upper left to the lower right in FIGS. 4 and 5 (from left to right in FIGS. 6 to 8) by a drive source (not shown), each joint 110C of the cable bear 110 is bent. Even if the parts are aligned while colliding with the support member 16 from the portion, they are colliding with each other through the vibration isolating material 20, so that the generation of impact sound and vibration is reduced. As the anti-vibration material 20, like the anti-vibration material 18, it is preferable to use rubber or the like having high vibration absorption in that the generation of impact sound and vibration can be effectively reduced.

  As described above, by using the surface mounting apparatus 10, the cable bear can be held in a predetermined space even during acceleration / deceleration accompanying the movement of the cable bear, and the impact sound and vibration accompanying the movement of the cable bear can be maintained. However, if each joint 110C of the cable bear 110 is worn due to long-term use, a gap is generated between the presser member 12 and the cable bear 110, and the cable bear is prevented from lifting upward during acceleration / deceleration. There is a risk that it will not be possible to fully demonstrate the effect. If this effect cannot be sufficiently exhibited, the cable bear 110 jumps up more than expected and may come into contact with the ceiling cover of the surface mount device 10 or the like. Moreover, if each joint part 110C of the cable bear 110 is worn and the upward jump of the cable bear 110 is increased, the wear may be rapidly advanced.

  In this case, the screw 12B is loosened, the stepped screw 12A is used as a fulcrum to adjust the rotational direction, the height position of the presser member 12 is lowered, and the vibration isolator 18 (see FIG. 9) slightly slightly again. The cable bear 110 is brought into contact. When the presser member 12 is disposed at this position, the screw 12B is tightened to fix the position of the presser member 12.

  In addition, as a holding means of the pressing member 12, a spring that applies a downward force to the pressing member 12 may be provided instead of the screw 12B. Since the pressing member 12 is rotatably held with the stepped screw 12 </ b> A as a fulcrum, the pressing member 12 (vibration isolation material 18) always comes into contact with the cable bear 110.

  Further, as described above, the surface mounting apparatus 10 according to the present invention is provided with the lateral guide member 14 fixedly attached to the lower surface of the pressing member 12 and provided with guides (side plates 16B) on both sides of the support member 16. Thus, the transverse cross section of the support member 16 is U-shaped. Further, a vibration isolator 18 is provided between the lateral guide member 14 attached to the lower surface of the presser member 12 and the cable bearer 110, and a vibration isolator 20 is provided between the support member 16 and the cable bear 110. It has been.

  For this reason, when the X-direction moving mechanism 104 is accelerated or decelerated in the Y-direction by the Y-direction moving mechanism 106, the Y-direction inertial force generated in the cable bear 110 is not only the moving end 110A and the fixed end 110B, but also the holding member 12 and It is also received by the support member 16 and is also received by the frictional force between the vibration isolators 18, 20 and the cable bear 110. In this way, since the inertia force in the Y direction generated in the cable bear 110 is distributed and received, it is possible to prevent abrupt wear from progressing only at a specific joint portion 110C.

  When the head unit 102 is positioned at the right end, as shown in FIG. 5, the cable bearer 110 comes off from below the presser member 12, and the presser member 12 cannot receive the inertia force in the Y direction generated on the cable bearer 110. However, since two-thirds or more of the cable bear 110 receives the frictional force with the vibration isolator 20, the moving end 110A only needs to receive the inertial force for the remaining one-third or less. Wear does not progress rapidly at the joint 110C of 110A.

  In addition, the head unit 102 included in the surface mounting apparatus 10 described above has a plurality of heads mounted thereon, but the number of heads mounted on the head unit of the surface mounting apparatus according to the present invention is not limited, and a single unit may be used. There may be multiple. The mechanism for holding the component by the head is not particularly limited. For example, a mechanism for holding the component by suction or a mechanism for holding the component by pinching may be used.

The perspective view which shows the structural part relevant to the head unit of the conventional surface mounting apparatus, and its moving mechanism. View of cable bear from the side Diagram showing the jumping phenomenon of the cable bear The perspective view which shows the structural part relevant to the head unit of the surface mounting apparatus of embodiment which concerns on this invention, and its moving mechanism (when a head unit is located in the left end) The perspective view which shows the structural part relevant to the head unit of the surface mounting apparatus of embodiment which concerns on this invention, and its moving mechanism (when a head unit is located in a right end) View of the cable carrier from the side (when the head unit is located at the left end) View of the cable carrier from the side (when located near the middle of the X-direction moving mechanism) View of the cable carrier from the side (when the head unit is located at the right end) AA line sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Surface mounting apparatus 12 ... Pressing member 12A ... Stepped screw 12B ... Screw 12C ... Long hole 14 ... Side guide member 14A ... Top plate 14B ... Side plate 16 ... Supporting member 16A ... Bottom plate 16B ... Side plate 18, 20 ... Damping material

Claims (3)

A head unit including a head for mounting on a substrate by holding the component, and a cable coupled to the head unit, the horizontal back and forth moves on a linear path in the horizontal direction by holding the cable on the inside In a surface mount device having a cable bear that is bent so as to protrude and a linear support member that supports the cable bear from below,
Both ends of the cable bear consist of an upper end that is a moving end and a lower end that is a fixed end,
It is possible to adjust the position in the vertical direction, and is provided with a pressing member above the cable bear to prevent the cable bear from being lifted upward when the cable bear moves.
The presser member is not connected to the cable bear, and the presser member prevents each joint portion of the cable bear from being positioned above the upper end of the cable bear. Surface mount equipment.   The surface according to claim 1, wherein a vibration isolating material is provided between the pressing member and the cable bear, and a vibration isolating material is provided between the linear support member and the cable bear. Mounting device.   A guide for restricting movement of the cable bear in a direction orthogonal to a longitudinal direction of the linear support member is provided on both sides of the presser member and both sides of the linear support member. The surface mounting apparatus according to claim 1 or 2.

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