JP2004122950A - Workpiece positioning mechanism of conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate to load different kinds of workpieces on an arm by varying projection length of a locating pin positioning the workpiece to the arm. <P>SOLUTION: A guide member 28 is mounted on a loading part 18b of the arm 18 from the top surface of a hole part 26a of a mounting plate 26. The guide member 28 is inserted to the hole part 26a of the mounting plate 26, and a flange part 30a of a pin holding cylinder 30 is abutted to the undersurface of the mounting plate 26. A bush 32 and a holding cam 34 are inserted to the respective surfaces of an inner diameter of the pin holding cylinder 30. A locating pin 36 is displaceably loosely inserted to the bush 32 and the holding cam 34. A pair of guide grooves is axially formed oppositely to radial direction on the pin holding cylinder 30, and a pair of spiral grooves 42 is oppositely formed on the holding cam 34. A guide pin 52 is displaced in the axial longitudinal direction of the guide groove 40 by the rotation of the holding cam 34, and the locating pin 36 is displaced to the lower end or the upper end position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a work positioning mechanism of a transfer device that transfers a work such as an automobile body, and more particularly, to a work of a different type by changing a work positioning height by using the same line or the like even if the work is positioned differently. The present invention relates to a work positioning mechanism of a transfer device capable of transferring.
[0002]
[Prior art]
Conventionally, for example, in a hanger of a transfer device that transfers a work such as an automobile body on a transfer rail, a cable is provided near a work receiving table that constitutes the hanger to prevent displacement of the work by engaging with the work. A positioning pin that can move freely by a spring is provided to perform positioning between the hanger and the work (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Publication No. 5-65391 (pages 2 to 3, Fig. 3)
[0004]
[Problems to be solved by the invention]
However, in the above-described hanger of the transfer device, when positioning works having different positioning heights on the hanger, it is necessary to replace the positioning pins themselves with positioning pins having different lengths, so that versatility can be improved. Did not.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. By making the positioning height of a work variable, the work positioning of a transfer device that can easily cope with different kinds of works. The purpose is to provide a mechanism.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is provided in a transfer device for transferring a work, a work positioning mechanism of a transfer device including a positioning pin for positioning the work,
A pin holding member,
A positioning pin member extending in the axial direction with respect to the pin holding member;
With
Guide means for displacing the positioning pin member in the axial direction thereof by rotating the pin holding member is provided.
[0007]
In this case, the guide means is provided inside the pin holding member.
[0008]
Further, the holding mechanism of the pin holding member and the turning mechanism of the guide means are provided integrally.
[0009]
Further, the guide means has a guide pin locked by the positioning pin member, a guide groove formed in the pin holding member and extending in an axial direction, and a holding cam having a spiral groove engaged with the guide groove. And characterized in that:
[0010]
ADVANTAGE OF THE INVENTION According to this invention, positioning of a different kind of workpiece | work becomes easy by making the protrusion length of the positioning pin which positions a workpiece | work to an arm variable. For this reason, even if different types of works are conveyed, positioning can be performed efficiently in a short time, and versatility can be improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a work positioning mechanism of a transport device according to the present invention will be described in detail with reference to the accompanying drawings.
[0012]
FIG. 1 is a schematic structural front view showing a work positioning mechanism 10 of a transport device according to a first embodiment of the present invention, and FIG. 2 is a side view of a main part of the work positioning mechanism 10 shown in FIG. .
[0013]
The gist of the work positioning mechanism 10 of the transfer device according to the first embodiment is to manually position the positioning pin mechanism 24. That is, the work positioning mechanism 10 is provided with an arm 18 on which a body 14 as a work carried by the rail 12 is mounted, and is mounted on a mounting portion 18b of the arm 18 via a body receiving table 22 and is provided with the body support. A positioning pin mechanism 24 for preventing the body 14 placed on the table 22 from being displaced.
[0014]
As shown in FIG. 3, the positioning pin mechanism 24 basically includes a mounting plate 26 fixed to the mounting portion 18b of the arm 18 via the body receiving table 22 (see FIG. 1), and the mounting plate 26 The guide member 28 has a stepped cylindrical portion 28a inserted from the upper surface of the hole 26a.
[0015]
On the lower surface of the mounting plate 26, a hanger 16 (see FIGS. 1 and 2) and a pin holding cylinder (pin holding member) 30 having a positioning function as a fixed-side device are provided via a flange portion 30a. The bush 32 is inserted through the inner diameter surface of the member 28. A holding cam 34 is inserted through the inner diameter surface of the pin holding cylinder 30, and a positioning pin (positioning pin member) 36 is loosely inserted into the bush 32 and the holding cam 34. The guide member 28 and the pin holding cylinder 30 are fixed to the mounting plate 26 via a screw member 38.
[0016]
As shown in FIG. 4, a pair of guide grooves (holding mechanisms) 40 are formed on the outer peripheral surface of the pin holding cylinder 30 in the axial direction so as to face each other at a position at 180 ° in the radial direction. The holding cam 34 has a pair of spiral grooves (rotating mechanism) 42 formed on the outer peripheral surface thereof facing each other, and a pair of cutout grooves 34a formed on one side end thereof.
[0017]
As shown in FIGS. 4 and 5, the spiral groove 42 has flat grooves 42 a and 42 b that are substantially orthogonal to the axial direction at the lower end position and the upper end position, and a slope inclined in the axial direction between the flat grooves 42 a and 42 b. And a groove 44. The flat groove portions 42a and 42b formed at the upper end position and the lower end position of the spiral groove 42, respectively, intersect the guide groove 40 in a substantially orthogonal direction, so that the holding force of the guide pin 52 can be improved.
[0018]
The notch groove 34a of the holding cam 34 is engaged with a projection 46a of a handle jig 46 which is manually rotated as shown in FIG. When the is rotated, the guide pin 52 is displaced in the vertical direction (the arrow X direction and the arrow Y direction in FIG. 3), and the amount of expansion and contraction of the positioning pin 36 in the axial direction is adjusted. The handle 48 is attached to a handle jig 46.
[0019]
One end of the positioning pin 36 has a conical shape, and a hole 50 is formed near the other end, and a guide pin 52 is attached to the hole 50 by a pin member 50a.
[0020]
The guide pin 52 is inserted into the spiral groove 42 of the holding cam 34 and is guided by the guide groove 40 of the pin holding cylinder 30 so as to be displaceable along the axial length direction.
[0021]
The work positioning mechanism 10 of the transfer device according to the first embodiment of the present invention is basically configured as described above. Next, the operation and operation and effect thereof will be described.
[0022]
When the protrusion 46a of the handle jig 46 is engaged with the notch groove 34a of the holding cam 34, and the handle jig 46 is manually rotated via the handle 48, the spiral groove 42 is formed by the cooperation of the holding cam 34. The engaging guide pin 52 rises in the axial direction (in the direction of the arrow X in FIG. 3) with the guide groove 40 of the pin holding cylinder 30 as a guide.
[0023]
Thus, as the guide pin 52 is displaced from the lower end to the upper end along the guide groove 40, the positioning pin 36 switches from the lower end (solid line) to the upper end (two-dot chain line) (see FIG. 3).
[0024]
Therefore, the tip of the positioning pin 36 enters the hole (not shown) of the vehicle body 14, and the vehicle body 14 is positioned.
[0025]
On the other hand, when a vehicle body 14a different from the vehicle body 14 is conveyed via the rails 12 (see FIGS. 1 and 2), the upper surface of the body receiver 22 and the lower surface of the vehicle body 14a placed on the body receiver 22 When the projection length of the positioning pin 36 engaging with the vehicle body 14a is to be shortened in accordance with the height H (see FIG. 1), the projection 46a of the handle jig 46 is inserted into the notch groove 34a of the holding cam 34. The handle jig 46 is rotated by engagement.
[0026]
As a result, the guide pin 52 descends (in the direction of arrow Y in FIG. 3) and is displaced from the upper end to the lower end of the guide groove 40 of the pin holding cylinder 30, and the positioning pin 36 moves from the upper end (two-dot chain line) to the lower end (dotted line). The position switches to the position indicated by the solid line).
[0027]
In the work positioning mechanism 10 of the transfer device according to the first embodiment, the switching operation of switching the positioning pin 36 to the lower end or upper end position can be manually performed, and the work is easily positioned at a predetermined height. It is possible.
[0028]
Next, a holding cam 35 according to a modified example will be described with reference to FIG. The same components as those of the holding cam 34 shown in FIG. 5 are denoted by the same reference numerals, and a detailed description thereof will be omitted.
[0029]
As shown in FIG. 6, the holding cam 35 according to this modified example has a flat groove portion substantially orthogonal to the axial length direction at a substantially middle position between the flat groove portions 42 a and 42 b formed at the upper end position and the lower end position of the spiral groove 42. 42c.
[0030]
Therefore, when the position of the positioning pin 36 is switched so that the height differs depending on the type of the body as a work, the use of the holding cam 35 can cope with even more types of bodies, and can be applied to a body under the small-lot production of many models. Can be easily processed, and versatility can be improved.
[0031]
Next, a work positioning mechanism 60 of a transfer device according to a second embodiment of the present invention will be described with reference to FIGS.
[0032]
7 is a front view of the work positioning mechanism 60, FIG. 8 is a plan view, and FIG. 9 is a side view of a main part of FIG. The same components as those of the workpiece positioning mechanism 10 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0033]
In the work positioning mechanism 60 of the transfer device according to the second embodiment, the positioning pin mechanism 24 is automatically rotated by power to perform positioning.
[0034]
7 and 8, in the middle of the transport path of the hanger 16 (see FIGS. 1 and 2), a vertical regulating means 64 for regulating a vertical position (the direction of the arrow A in FIG. 8), and the bed 62 A width direction regulating means 66 for regulating the position of the arm 18 in the width direction (the direction of arrow B in FIG. 7), and a power for operating the positioning pin mechanism 24 to engage the positioning pin mechanism 24 with the vehicle body 14. Rotating means 68 is provided.
[0035]
The vertical restricting means 64 is rotatably supported by clamp claws 70 a and 70 b which oppose the arm 18 in the vertical direction and sandwich both side surfaces of the lower portion 18 a of the arm 18, and a support table 72 attached to the bed 62. Actuator 74 provided.
[0036]
In this case, the vertical direction regulating means 64 includes arms 80a, 80b each having one side fastened to the clamp claws 70a, 70b and the other side secured to shaft pins 78a, 78b supported by the bracket 76. , The gears 82a, 82b fixed to the shaft pins 78a, 78b and meshing with each other, and one side is engaged with a joint 84 fixed to the rod 74a of the actuator 74, and the other side is connected to the shaft pins 78a, 78b. And a link 86 secured to the link.
[0037]
When the actuator 74 is driven and the rod 74a projects, the link 86 rotates through the joint 84. As a result, the gears 82a and 82b cooperate to rotate the arms 80a and 80b. As a result, both side surfaces of the lower portion 18a of the arm 18 are clamped by the clamp claws 70a and 70b.
[0038]
The width direction regulating means 66 includes a stopper claw 88 for pressing the mounting portion 18b of the arm 18 in the width direction, an actuator 92 rotatably supported by a support base 90 attached to the bed 62, and one side portion. An arm 98 is fixed to the stopper claw 88 and the other side is fixed to a shaft pin 96 supported by a bracket 94. The stopper claw 88 is provided with a link 102 whose one side is supported by the shaft pin 96 and whose other side is engaged with the joint 100 of the actuator 92.
[0039]
When the actuator 92 is driven and the rod 92a is projected, the shaft pin 96 cooperates with the rotation of the link 102, and the side of the mounting portion 18b is rotated by the rotation of the arm 98 so that the side surface of the mounting portion 18b stops. To restrict the position of the arm 18 in the width direction.
[0040]
The power rotating means 68 for rotating the holding cam 34 (see FIG. 3) by power includes an actuator 106, and the actuator 106 is fixed to the bed 62. A joint 108 is attached to the rod end of the actuator 106.
[0041]
A slide member 112 is slidably inserted into a guide rail 110 provided on a bracket 111 fixed to the bed 62. The slide member 112 is engaged with the connection shaft 114 fixed to the joint 108, and moves in the vertical direction (the X and Y directions in FIG. 7) along the guide rail 110 under the driving action of the actuator 106.
[0042]
A guide sleeve 116 is disposed on the slide member 112 in the up-down direction (the arrow X direction and the arrow Y direction in FIG. 7).
[0043]
A rotating member 118 that is rotated by a driving source (not shown) is provided in the inner hole 120 of the guide sleeve 116.
[0044]
The guide sleeve 116 has a hole 116a (see FIG. 10) that engages with the outer periphery of the pin holding cylinder 30, and a tip taper having a guide function for inserting the outer periphery of the pin holding cylinder 30 into the hole 116a. Unit 116b (see FIG. 10).
[0045]
The turning member 118 for turning the holding cam 34 provided in the pin holding cylinder 30 has a protruding portion 118a (see FIG. 10) which is engaged with the notch groove 34a of the holding cam 34 at its tip. You.
[0046]
The work positioning mechanism 60 of the transfer device according to the second embodiment of the present invention is basically configured as described above. Next, the operation and effect of the work will be described.
[0047]
The vehicle body 14 as a work placed on the body receiving table 22 of the arm 18 is conveyed via the rail 12 (see FIGS. 1 and 2), and stops the arm 18 when the vehicle body 14 is moved to a predetermined position. .
[0048]
Next, the actuator 74 is driven, the lower portion 18a of the arm 18 is clamped by the clamp claws 70a, 70b via the arms 80a, 80b, and the position of the arm 18 in the vertical direction (the direction of the arrow A in FIG. 8) is regulated. You. Further, the actuator 92 is driven, and the side surface of the mounting portion 18b of the arm 18 is pressed by the stopper claw 88 via the arm 98, so that the position of the arm 18 in the width direction (the direction of the arrow B in FIG. 7) is regulated. . As described above, the position of the arm 18 in the vertical direction and the width direction is regulated, so that the arm 18 is stopped at a predetermined position.
[0049]
Then, when the actuator 106 is driven and the slide member 112 is raised (in the direction of the arrow X in FIG. 7), the tip tapered portion 116 b of the guide sleeve 116 is fitted on the outer peripheral portion of the pin holding cylinder 30 as shown in FIG. The projection 118a of the rotating member 118 is engaged with the notch groove 34a of the holding cam 34, so that the positioning pin mechanism 24 and the power turning means 68 can be aligned with each other.
[0050]
Next, when the rotating member 118 is rotated under the driving action of a driving source (not shown), the guide pin 52 guides the guide groove 40 of the pin holding cylinder 30 by the cooperation of the holding cam 34, and the lower end of the guide groove 40. From the lower end (solid line) to the upper end (two-dot chain line).
[0051]
Then, by lowering the slide member 112 (in the direction of the arrow Y in FIG. 7) under the driving action of the actuator 106, the hole 116a of the guide sleeve 116 is separated from the outer peripheral portion of the pin holding cylinder 30, and the notch of the holding cam 34 is cut out. The engagement between the groove 34a and the protrusion 118a of the rotating member 118 is released.
[0052]
Here, when a vehicle body 14a different from the vehicle body 14 is conveyed via the rails 12 (see FIGS. 1 and 2), the upper surface of the body receiver 22 and the bottom surface of the vehicle body 14a mounted on the body receiver 22 The case where the projection length of the positioning pin 36 engaging with the vehicle body 14a is shortened in accordance with the height H (see FIG. 7) of FIG.
[0053]
The actuator 106 is driven to raise the slide member 112, and the protrusion 118 a of the rotating member 118 engages with the notch groove 34 a of the holding cam 34.
[0054]
Next, when the guide sleeve 116 is rotated under the driving action of a driving source (not shown), the guide pin 52 guides the guide groove 40 of the pin holding cylinder 30 by the cooperation of the holding cam 34, from the upper end of the guide groove 40. Displaced to the lower end, the positioning pin 36 switches from the upper end position to the lower end position.
[0055]
In the second embodiment, the projection 118 a of the rotating member 118 engages with the notch groove 34 a of the holding cam 34, so that even if some external force is applied to the positioning pin 36, the positioning by the rotating member 118 is performed. The displacement of the pin 36 can be prevented, and the positioning pin 36 can be held at a fixed position.
[0056]
In the embodiment of the present invention, an example has been described in which the projecting length of the positioning pin 36 for positioning the vehicle bodies 14 and 14a as the work placed on the arm 18 to the arm 18 is variable. The present invention is not limited to this, and can be applied to a positioning structure for a work or the like on a transport pallet.
[0057]
Further, by providing the spiral groove 42 with the multi-stage flat groove portions 42a to 42c, the position of the positioning pin 36 can be set in multiple stages.
[0058]
【The invention's effect】
As described above, according to the present invention, it is easy to position different types of workpieces by changing the axially projecting length of the positioning pins of the workpieces by the rotary guide means. Can be improved.
[0059]
In addition, since the guide means is provided inside the pin holding member, it is difficult to receive a rotational force due to interference with the outside, and it is not necessary to separately provide a holding member, and the configuration can be simplified.
[Brief description of the drawings]
FIG. 1 is a schematic structural front view of a work positioning mechanism of a transfer device according to a first embodiment.
FIG. 2 is a side view of a main part of the work positioning mechanism of FIG. 1;
FIG. 3 is a schematic vertical cross-sectional structural view showing an engagement relationship between a positioning pin mechanism and a handle jig in FIG. 1;
4 is a schematic structural perspective view of a pin holding cylinder, a holding cam and a positioning pin of FIG. 3;
FIG. 5 is a development view of a spiral groove of the holding cam of FIG. 4;
FIG. 6 is a development view of the multi-stage spiral groove of FIG. 5;
FIG. 7 is a schematic structural front view of a work positioning mechanism of a transfer device according to a second embodiment.
FIG. 8 is a plan view of the work positioning mechanism of FIG. 7;
FIG. 9 is a side view of a main part as viewed in the direction of arrow Z in FIG. 7;
FIG. 10 is a schematic longitudinal cross-sectional structural view showing an engagement relationship between a positioning pin mechanism of FIG. 7, a guide sleeve, and a rotating jig.
[Explanation of symbols]
10, 60: Workpiece positioning mechanism 12 of transporting device 12: Rail 14, 14a ... Body 18 ... Arm 22 ... Body receiving stand 24 ... Positioning pin mechanism 26 ... Mounting plate 28 ... Guide member 30 ... Pin holding cylinders 34, 35 ... Holding cam 34a ... notch groove 36 ... positioning pin 40 ... guide groove 42 ... spiral groove 44 ... inclined groove 52 ... guide pin 62 ... bed 64 ... vertical direction regulating means 66 ... width direction regulating means 68 ... power turning means 70a, 70b ... clamp Claws 74, 92, 106: Actuators 78a, 78b, 96: Shaft pins 86, 102: Link 110: Guide rail 112: Slide member 116: Guide sleeve 118: Rotating member

Claims (4)

A work positioning mechanism of the transfer device provided in the transfer device for transferring the work, and including a positioning pin for positioning the work,
A pin holding member,
A positioning pin member extending in the axial direction with respect to the pin holding member;
With
A work positioning mechanism for a transfer device, further comprising a guide means for displacing the positioning pin member in the axial direction by rotating the pin holding member. The work positioning mechanism of the transfer device according to claim 1,
The work positioning mechanism of a transport device, wherein the guide unit is provided inside the pin holding member. The work positioning mechanism of the transfer device according to claim 2,
The holding mechanism of the pin holding member and the rotating mechanism of the guide unit are provided integrally, and the work positioning mechanism of the transport device is provided. 4. The work positioning mechanism according to claim 1, wherein:
The guide means includes a guide pin locked by the positioning pin member, a guide groove formed in the pin holding member and extending in an axial direction, and a holding cam having a spiral groove engaged with the guide groove. A work positioning mechanism for a transfer device, comprising:

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