JP6437046B2 - Grommet inner diameter expansion device - Google Patents

Description

  The present invention relates to a grommet inner diameter expansion device, and more particularly to a grommet inner diameter expansion device for inserting a wire harness with a connector into a long grommet used for an opening / closing part of a vehicle door. It is.

  The electrical components of vehicles such as automobiles have become highly sophisticated and complicated with the advancement of IT technology, and high reliability is required for the connection portion of wiring that transmits information and the like. For this reason, wiring grommets have been frequently used for improving the reliability of the connector and for waterproofing, soundproofing, preventing damage to the wire harness, etc. in the wire harness penetrating part of the vehicle body and the like. In addition, due to the diversification and sophistication of electrical components, various electrical components are also installed in the opening and closing parts of doors, etc. The body and door opening and closing parts are more flexible than conventional wiring grommets. A long grommet having a bellows portion in the middle has been used.

  Conventionally, as a device for inserting a wire harness with a connector into a wiring grommet, a plurality of pins attached to a plurality of movable plates are inserted into the grommet, and the movable plate is moved radially to widen the gap between the pins so that the grommet body A device that expands the section and passes the wire harness with connector through the expanded portion is common (Patent Document 1: Japanese Utility Model Laid-Open No. 4-97665). However, in the case of this device, since the pin for expanding the grommet body has a cantilever structure, the grommet having the elongated bellows-shaped intermediate portion described above can be used even if a long pin is used. The distal end side does not open against the contraction force of the grommet, so that it cannot be sufficiently expanded, and cannot be applied to the above-described grommet having an elongated bellows-shaped intermediate portion.

  Therefore, when inserting a conventional wire harness into a long grommet as described above, it has been necessary to rely on manual work. Specifically, it is a manual operation of inserting a wire with only a terminal attached using a jig for inserting the wire, and then inserting the terminal into the connector (Patent Document 2: JP-A-5-161229). Issue gazette). However, when a terminal is inserted into the connector later, the risk of miswiring cannot be said to be complete. Eventually, the quality inspection of the wire harness requires a lot of time and cost.

  In order to solve this problem, a device that expands a long grommet using both pins (for example, Patent Document 3: Japanese Patent Laid-Open No. 2001-25140) or a plurality of wires passed through the grommet, An apparatus (for example, Patent Document 4: Japanese Patent Application Laid-Open No. 2004-31850) for expanding a long grommet has been proposed.

  Among the above proposals, the device that expands the long grommet using a plurality of both-sided expansion claws (pins) has a complicated configuration combining a plurality of link mechanisms, and also has a plurality of expansion claws. When inserting the grommet, there is a problem in that it takes up space to use the linear slide mechanism for mounting and dismounting the expanding claw support on one side. Also, a device that stretches each wire through a plurality of wires through the grommet requires a complicated operation of passing the plurality of wires through the grommet and setting one end of each of the plurality of wires at a predetermined position. There is a problem in workability because it is necessary to pull out the wire from the gap of the wire harness in the grommet after the harness is inserted.

Japanese Utility Model Publication No. 4-97665 JP-A-5-161229 JP 2001-25140 A JP 2004-31850 A

  As described above, in the case of the conventionally proposed grommet inner diameter expansion device, it is not possible to deal with long grommets, or because it depends on human work, problems such as miswiring are likely to occur, and the mechanism is not reliable. There were problems such as being complicated, unwieldy and costly.

  The present invention has been made to solve such a problem in the prior art, and has a simple configuration, does not take up space for installation, is easy to handle, and can efficiently perform an inner diameter expansion operation of a long grommet. It is an object of the present invention to provide a grommet inner diameter expanding device.

The invention according to claim 1 for solving the above-described problem is driven so that the horizontal drive unit and the vertical drive unit installed on the gantry and the horizontal drive unit of the horizontal drive unit move in the opposite horizontal directions. A pair of L-shaped horizontal moving arms, a pair of L-shaped vertical moving arms driven to move in a vertically opposite direction by vertical driving means of the vertical driving unit, the horizontal moving arms and the vertical It consists of an extension bar installed on each moving arm, and a tension bar.
The tension rod has an expansion rod support means at its distal end portion, which has an expansion rod support means for holding the distal end portion of the expansion rod and bringing it into a both-end support state.

  In one embodiment, the extension bar support means includes a holding arm pivotally supported at a tip end portion of the tension bar, and an operation handle fixed to an end portion of the holding arm. Clamping means for clamping the distal end portion of the expansion rod at the distal end portion is provided.

  In one embodiment, the operation handle includes an automatic locking mechanism for disabling the rotation of the extension bar when the holding arm is clamped by the holding arm, and is provided on the holding arm shaft support at the tip of the tension bar. , A microswitch and a display means are provided for confirming that the holding arm is rotated to a normal position and the expansion rod is correctly clamped. In one embodiment, focusing of the expansion rod proceeds with a time difference between the horizontal direction and the vertical direction.

  In one embodiment, the horizontal driving means and the vertical driving means include a pair of guide rails, a slide base that is slidably installed on the guide rail, and a rotating cam disposed between the slide bases. And a return spring installed across the slide base, and the horizontal movement arm and the vertical movement arm are fixed to the slide base, respectively. In this case, the rotating cam is attached to the reduction motor shaft via a ball bearing with a built-in one-way clutch, and the rotational driving force is transmitted to the rotating cam only when the reduction motor shaft is rotated forward.

  The inner diameter expansion device for a grommet according to the present invention is as described above, and there is an effect that the inner diameter expansion operation of a long grommet can be efficiently performed with a simple configuration, without taking up space for installation.

It is a side view which shows the external appearance example of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion rod focusing state). It is a front view which shows the external appearance example of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion rod focusing state). It is a front view which shows the external appearance example of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion rod separation state). It is a perspective view which shows the usage method of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion rod focusing state). It is a perspective view which shows the usage method of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion stick separation state). It is a perspective view which shows the usage method of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion rod focusing state at the time of grommet wearing). It is a perspective view which shows the usage method of the internal diameter expansion apparatus of the grommet which concerns on this invention (expansion stick separation state at the time of grommet wearing). It is a figure which shows the structure of the operation handle and holding arm in the internal diameter expansion apparatus of the grommet which concerns on this invention. It is a figure which shows the structural example of the horizontal drive means in the internal diameter expansion apparatus of the grommet which concerns on this invention (closed state). It is a figure which shows the principal part of the horizontal drive means in the internal diameter expansion apparatus of the grommet which concerns on this invention (closed state). It is the schematic which shows the effect | action in the internal diameter expansion apparatus of the grommet which concerns on this invention.

  Embodiments of the present invention will be described with reference to the accompanying drawings. A grommet inner diameter expansion device according to the present invention is a pair of horizontal drive units 2 and 3 installed on a gantry 1 and a pair of horizontal drive units driven by horizontal drive means of the horizontal drive unit 2 so as to move in opposite horizontal directions. L-shaped horizontal moving arms 4, 5, a pair of L-shaped vertical moving arms 6, 7 driven so as to move vertically opposite to each other by the vertical driving means of the vertical driving unit 3, and the horizontal moving arm 4 , 5 and the vertical movement arms 6 and 7, respectively, and expansion rods 8 to 11 and tension rods 12 to 15.

  The horizontal moving arms 4 and 5 are arranged such that the tip ends of both are abutted, and the vertical moving arms 6 and 7 are arranged such that the tips of both are abutted and are perpendicular to the horizontal moving arms 4 and 5. The movable arms 6 and 7 are arranged so as to form a cross shape orthogonally (see FIG. 2).

  The rear ends of the expansion rods 8 to 11 are attached to the front ends of the horizontal moving arms 4 and 5 and the vertical moving arms 6 and 7, and the corners of the horizontal moving arms 4 and 5 and the vertical moving arms 6 and 7. The rear ends of tension bars 12 to 15 corresponding to the expansion bars 8 to 11 are attached to the parts (see FIGS. 4 to 7). The expansion rods 8 to 11 and the tension rods 12 to 15 are installed in parallel.

  The four expansion rods 8 to 11 are inserted into the long grommet G in a focused state (see FIG. 6), and then expand to expand the long grommet G (see FIG. 7). The length is a length corresponding to the long grommet G to be expanded.

  The tension rods 12 to 15 support the cantilevered expansion rods 8 to 11 in a both-held state, and fulfill the function of securing the strength of the expansion rods 8 to 11 during the inner diameter expansion operation of the long grommet G. , Respectively, are provided with expansion rod support means that hold the distal ends of the expansion rods 8 to 11 firmly and put them in a both-end supported state.

  The illustrated extension rod support means comprises a holding arm 16-19 that is pivotally supported at the tip of the tension rod 12-15, and an operation handle 20-23 that is connected and fixed to the end of the holding arm 16-19. It is. Clamping means for clamping the distal ends of the expansion rods 8 to 11 is provided at the distal ends of the holding arms 16 to 19. This clamping means is, for example, a locking hole 24 for engaging the distal ends of the expansion rods 8 to 11 (see FIGS. 3 and 5).

  The operation handles 20 to 23 are usually connected and fixed to the holding arms 16 to 19 at an angle of 90 degrees, and the connecting and fixing portions are pivotally supported at the ends of the tension bars 12 to 15 (see FIG. 8). . Specifically, a connecting portion between the operation handle 20-23 and the holding arm 16-19 is disposed in the bifurcated portion 31 at the tip of the tension rods 12-15, and a pair of hinge bolts 32 screwed into the bifurcated portion 31 from both sides. It is pivotally supported. In this case, when the operation handles 20 to 23 are rotated by 90 degrees, the holding arms 16 to 19 are rotated by 90 degrees, and the holding arms 16 to 19 are in a state perpendicular to the tension bars 12 to 15. When the extension rods 8 to 11 are clamped (see FIGS. 1 to 4, 6 and 7) and rotated from the state to be coaxial with the tension rods 12 to 15, An unclamped state is established (see FIG. 5).

  The operation handles 20 to 23 are provided with an automatic locking mechanism in order to prevent the operation handles 20 to 23 from being inadvertently turned into an unclamped state when the extension bars 8 to 11 are clamped by the holding arms 16 to 19.

  FIG. 8 shows an example of an automatic locking mechanism. In this case, the automatic locking mechanism has a notch in which a convex portion 33 which is a lower end portion of the operation handles 20 to 23 is recessed at the inner bottom portion of the bifurcated portion 31. The operation handles 20 to 23 are locked with respect to the tension bars 12 to 15 by fitting in the holes 34. More specifically, a pair of flanges 35 and 36 are formed at the end portions of the operation handles 20 to 23, and a portion protruding from the end-side flange 35 is a convex portion 33 fitted into the notch hole 34.

  End portions of the operation handles 20 to 23 including the pair of flanges 35 and 36 are slidably inserted into insertion holes 37 formed in the upper portions of the holding arms 16 to 19. In the insertion hole 37, a spring 38 is provided that is urged so that the operation handles 20 to 23 are inserted and the convex portion 33 is fitted into the notch hole 34. One end surface of the spring 38 is in contact with the flange 36, and the other end surface is in contact with the reduced opening edge 39 of the insertion hole 37. The ends of the pair of hinge bolts 32 screwed into the bifurcated portion 31 from both sides screw into the insertion holes 37 and face the pair of flanges 35 and 36. Thus, the operation handles 20 to 23 cannot be removed from the insertion hole 37 because the flange 35 hits the tip of the hinge bolt 32.

  In the case of this configuration, when the extension bars 8 to 11 are clamped by the holding arms 16 to 19, the operation handles 20 to 23 are rotated from a position perpendicular to the tension bars 12 to 15 to the same axis. However, when they reach the same axis, the convex portions 33 of the operation handles 20 to 23 urged by the spring 38 are fitted into the notch holes 34. Thus, the operation handles 20 to 23 are locked and prevented from rotating (the states shown in FIGS. 8A and 8C), and the clamping action of the holding arms 16 to 19 on the expansion rods 8 to 11 is maintained.

  When unlocking the operation handles 20 to 23, the projections 33 may be pulled out of the notch holes 34 by pulling the operation handles 20 to 23 against the urging force of the spring 38 (FIG. 8B). State). In that case, the operation handles 20 to 23 can be moved by an interval between the pair of flanges 35 and 36.

  Preferably, the microarm 40 and the microswitch 40 for confirming that the holding arms 16 to 19 are rotated to the normal position on the bifurcated portion 31 and the expansion rods 8 to 11 are correctly clamped. It is preferable to provide an external display means that operates in response to a signal (see FIG. 8C). As the external display means, for example, a green lamp that is turned on when the expansion rods 8 to 11 are correctly clamped can be used. In addition, when an attempt is made to separate the expansion rods 8 to 11 in a state where they are not correctly clamped, an alarm can be sounded.

  FIG. 9 and FIG. 10 show a configuration example of the horizontal drive means and the vertical drive means in the inner diameter expansion device of the grommet according to the present invention, which is composed of a pair of guide rails 41 and 42 and the respective guide rails. The slide bases 43 and 44 are slidably installed on the slide bases 41 and 42, the rotary cam 46 is disposed between the slide bases 43 and 44, and the return spring 45 is installed across the slide bases 43 and 44. The horizontal moving arms 4 and 5 are fixed to the slide bases 43 and 44, respectively. The vertical drive means of the vertical drive unit 3 adopts the same configuration as this horizontal drive means and is installed with an inclination of 90 degrees.

  The rotation cam 46 is attached to a shaft of a reduction motor (not shown) via a ball bearing 50 with a built-in one-way clutch, and is a rotation drive hook boss protruding from a rotation drive disc 51 fixedly installed on the reduction motor shaft. Combined with being pushed by 52, it is rotationally driven in one direction (counterclockwise in FIG. 10). That is, the clutch of the one-way clutch built-in ball bearing 50 is actuated during normal rotation of the reduction motor shaft, and the rotation of the reduction motor shaft is transmitted to the rotary cam 46. As will be described later, when the reduction motor shaft rotates in the reverse direction, the ball bearing 50 with a built-in one-way clutch becomes free, and the rotation of the reduction motor shaft is not transmitted to the rotating cam 46.

  As shown in FIGS. 9 and 10, a link bar 47 having one end pivotally attached to the slide base 43 is pivotally attached to one end portion of the rotary cam 46 (pivot support portion 53), and the other end portion of the rotary cam 46. The link bar 48 having one end pivotally attached to the slide base 44 is pivotally attached (the pivotal support portion 54).

  In the case of this configuration, when the reduction motor operates in a state in which the horizontal movement arms 4 and 5 shown in FIG. 9 are closed (see FIG. 10A), the rotating cam 46 and the rotation driving disk attached to the motor shaft. 51 is rotationally driven. At this time, the rotary cam 46 is pushed back by the rotational drive hook boss 52 and rotates counterclockwise by a predetermined angle about the reduction motor shaft (see FIG. 10B).

  As the rotating cam 46 rotates, the pivotal support portion 53 of the link bar 47 is pushed counterclockwise on the upper side of the rotating cam 46, so that the slide base 43 and the horizontal movement arm 4 fixed thereto are moved back to the return spring. 9 moves to the left in FIG. At the same time, the pivot support portion 54 of the link bar 48 is pushed counterclockwise on the lower side of the rotary cam 46, so that the slide base 44 and the horizontal movement arm 5 fixed thereto are applied to the contraction force of the return spring 45. Against this, it moves to the right in FIG.

  The horizontal drive means of the horizontal drive unit 2 (vertical drive means of the vertical drive unit 3) is not limited to that described above. For example, a pinion gear is arranged instead of the rotating cam 46, and the pinion gear is sandwiched between them. A pinion rack mechanism comprising a pair of racks arranged in mesh with each other can also be employed. In that case, one rack is fixed to the slide base 43 and the other rack is fixed to the slide base 44.

  Next, a method of using the grommet inner diameter expanding device having the above-described configuration will be described mainly with reference to FIGS. In use, in the state shown in FIG. 5 in which the expansion rods 8 to 11 are converged, the operation handles 20 to 23 are rotated to release the clamps of the expansion rods 8 to 11 by the holding arms 16 to 19, The tips of the expansion rods 8 to 11 are released (see FIG. 5). In this state, after extending the elongated grommets G over the converging expansion rods 8 to 11, the operation handles 20 to 23 are rotated in the reverse direction to clamp the tips of the holding arms 16 to 19. The expansion rods 8 to 11 are clamped by the means (the locking hole 24) (see FIG. 6).

  In the preferred embodiment, when correctly clamped here, for example, the green lamp is turned on by the action of the micro switch 28, and the operation handles 20 to 23 are locked by the notch holes 34, thereby ensuring safety. .

  Next, the horizontal drive unit of the horizontal drive unit 2 and the vertical drive unit of the vertical drive unit 3 are operated to move the horizontal movement arms 4 and 5 in the horizontal separation direction and move the vertical movement arms 6 and 7 in the vertical separation direction. Let In the case of the embodiment shown in FIGS. 9 and 10, the rotary cam 46 is driven to rotate at a predetermined angle, so that the horizontal movement arms 4 and 5 and the vertical movement arms 6 and 7 move by a predetermined distance in opposite directions. To do.

  Accordingly, the tension bars 12 and 13 fixed to the horizontal movement arms 4 and 5 and the extension bars 8 and 9 move in the horizontal separation direction, respectively, and the tension bar 14 fixed to the vertical movement arms 4 and 5. 15 and the expansion rods 10 and 11 are moved in the vertical separation direction, respectively, at which point the reduction motor stops. Thus, the expansion rods 8 to 11 are expanded so that the long grommet G is expanded into a quadrangular shape (diamond) (see FIG. 7), and the state is maintained, so that a wire harness with a connector is inserted. Is possible.

  After the insertion work of the wire harness with the connector, etc., the reduction motor is reversed and the rotational drive disk 51 is also reversed. In this case, the clutch of the ball bearing 50 with a one-way clutch is disengaged and the rotation cam 46 is separated from the reduction motor. It will be in a state in which free rotation is possible. In this state, the contraction force of the return spring 45 acts on the slide bases 43 and 44, and the slide bases 43 and 44 are attracted. As a result, the rotating cam 46 is reversed via the link bars 47 and 48, the horizontal movement arms 4 and 5 are moved in the horizontal proximity direction, and the expansion rods 8 to 11 shown in FIG.

  In this way, as the expansion rods 8 to 11 converge, the long grommet G naturally contracts. However, the expansion rods 8 to 11 are converged without force by the contraction force of the return spring 45. There is no damage to the inserted wire harness with connector. Even if a foreign object enters the long grommet G when the expansion rods 8 to 11 are focused, the expansion rods 8 to 11 stop focusing due to the resistance of the foreign material, and the contraction of the long grommet G stops. It is avoided that the wire harness with a connector is damaged by the foreign matter.

  In the focusing operation, the close movement of the expansion rods 8 and 9 in the horizontal direction and the close movement of the expansion rods 10 and 11 in the vertical direction do not necessarily have to proceed simultaneously. For example, the expansion rods 10 and 11 in the vertical direction move. It is possible to precede the proximity movement (preceding the reverse of the speed reduction motor in the vertical drive unit), and then move the expansion rods 8 and 9 in the horizontal proximity direction, respectively.

  FIG. 11 is a schematic diagram for explaining this operation in more detail. In this example, the expansion / contraction operation of the expansion rods 8 to 11 is performed by the foot switch, and the four expansion rods 8 to 11 are simultaneously opened by the first operation of the foot switch, and the vertical operation is performed by the second operation. Only the expansion rods 10 and 11 are closed, and the horizontal expansion rods 8 and 9 are closed by the third operation.

  In this case, first, the elongated grommets G are covered with the expansion rods 8 to 11 converged (FIG. 11A), and then the four expansion rods 8 to 11 are opened simultaneously by operating the foot switch. By opening the four expansion rods 8 to 11 at the same time, the long grommet G is expanded in a rectangular shape, and a sufficiently wide wire harness insertion space with a connector is generated (FIG. 11B). In this state, after inserting the wire harness with the connector into the long grommet G, only the extension rods 10 and 11 in the vertical direction are closed by the second operation of the foot switch, and the long grommet G is in the horizontally elongated rhombus expanded state (see FIG. 11 (C)).

  At that time, the operator pulls the wire harness with connector toward the front (left direction in FIG. 11; the left side of the apparatus is the worker's standing position in FIG. 2) and shifts it from the center. Combined with the contraction force of the long grommet G, the harness is sandwiched between the expansion rods 10 and 11 in the vertical direction, making subsequent pulling difficult, and damaging the wire harness with connector. . Finally, the horizontal extension rods 8 and 9 are closed by the third operation of the foot switch, the operation handles 20 to 23 are rotated to open the holding arms 16 to 19, and the distal ends of the extension rods 8 to 11 After releasing, the wire harness with a connector is pulled out from the expansion rods 8-11.

  As described above in detail, according to the grommet inner diameter expansion device according to the present invention, the long grommet G can be easily obtained without damaging the connector part that becomes the most obstacle when the wire harness with connector is inserted into the long grommet G. It is possible to pass through the inside, and the insertion work of the wire harness and other insertion objects with the connector can be performed easily and in a short time, so that the efficiency of the insertion work can be improved. The industrial applicability is extremely large.

DESCRIPTION OF SYMBOLS 1 Stand 2 Horizontal drive part 3 Vertical drive part 4,5 Horizontal movement arm 6,7 Vertical movement arm 8-11 Expansion bar 12-15 Tension bar
16-19 Holding arm 20-23 Operation handle 24 Locking hole 31 Bifurcated part 32 Hinge bolt 33 Protruding part 34 Notch hole 35, 36 Flange 37 Insertion hole 38 Spring 39 Opening edge 40 Micro switch 41, 42 Guide rail 43, 44 Slide base 45 Return spring 46 Rotating cam 47, 48 Link bar 50 Ball bearing with built-in one-way clutch 51 Rotation drive disk 52 Rotation drive hook boss 53, 54 Pivot

Claims (7)

A horizontal driving unit and a vertical driving unit installed on a gantry; a pair of L-shaped horizontal moving arms driven to move in opposite horizontal directions by a horizontal driving unit of the horizontal driving unit; and the vertical driving unit A pair of L-shaped vertical movement arms driven to move vertically opposite to each other by the vertical drive means, an extension bar installed on each of the horizontal movement arm and the vertical movement arm, and a tension bar. Consists of
The grommet inner diameter expanding device according to claim 1, wherein the tension bar is provided with an expansion bar support means at its front end for holding the front end of the expansion bar and holding the expansion bar.   The extension rod support means includes a holding arm pivotally supported at the tip end portion of the tension bar, and an operation handle fixed to the end portion of the holding arm, and the holding arm extends to the tip end portion of the extension rod. The grommet inner diameter expansion device according to claim 1, further comprising a clamping unit that clamps the distal end portion of the grommet.   The grommet inner diameter expansion device according to claim 2, wherein the operation handle includes an automatic lock mechanism for disabling the rotation of the expansion handle when the expansion rod is clamped by the holding arm.   The micro switch for confirming that the said holding arm rotates to a normal position and clamps the said expansion rod correctly is provided in the said holding arm axial support part of the said tension bar tip. Or the internal diameter expansion apparatus of the grommet of 3.   The grommet inner diameter expansion device according to claim 1, wherein focusing of the expansion rod proceeds with a time difference between a horizontal direction and a vertical direction.   The horizontal driving means and the vertical driving means include a pair of guide rails, a slide base that is slidably installed on the guide rail, a rotating cam disposed between the slide bases, and the slide base. The grommet inner diameter expansion device according to any one of claims 1 to 5, wherein the horizontal movement arm and the vertical movement arm are fixed to the slide base.   The grommet according to claim 6, wherein the rotating cam is attached to the reduction motor shaft via a ball bearing with a built-in one-way clutch, and the rotational driving force is transmitted to the rotating cam only when the reduction motor shaft rotates in the forward direction. Inner diameter expansion device.