JP2004115191A - Workpiece positioning mechanism of conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the positioning of various kinds of workpieces to a hanger by using a switching slide cam to displace along the slide direction of the hanger and a direction conversion member when switching the positioning mechanism positioning the workpiece to a plurality of positions. <P>SOLUTION: A horizontal plate 28 is fixed to a mounting part 16b of an arm 16. A pair of shaft pins 30 are slidably inserted in boss parts 28a, 28a of the horizontal plate 28, and connection plates 32, 34 are fixed on both end faces of the shaft pin 30. The switching slide cam 38 is slidably inserted into a guide member 36 fixed on the horizontal plate 28, and the direction conversion member 42 is fixed on the connection plates 32 with respect to the switching slide cam 38. When the tapered surface 38a of the switching slide cam 38 is engaged with the tapered surface 42a of the direction conversion member 42, the shaft pin 30 is displaced in the axial longitudinal direction, and a positioning pin body 54 is switched to a lower end position or an 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, can easily cope with different types of work by changing a work positioning height. The present invention relates to a work positioning mechanism of a transfer device.
[0002]
[Prior art]
2. Description of the Related 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 and a spring that prevent displacement of the work by engaging with the work near a work receiving portion that constitutes the hanger. Thus, a positioning pin that can move in and out 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 work positioning mechanism of the transfer device, when positioning a different type of work on the hanger, it is necessary to replace the positioning pin itself with a pin having a different length every time the type of work changes. Therefore, it has not been possible to improve the versatility when positioning and processing the work.
[0005]
The present invention has been made in order to solve the above-described problem, and provides a work positioning mechanism of a transfer device that can easily cope with different types of works by making the work positioning height variable. The purpose is to do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a work positioning mechanism that is provided in a transfer device that transfers a work, and includes a positioning pin for positioning the work.
Positioning pin body,
A slide cam having cam surfaces of different heights,
A direction changing member that engages with the slide cam and is displaced in a direction different from the sliding direction;
Wherein the positioning pin body moves integrally with the direction changing member to position the work at different positions with respect to different types of work.
[0007]
In this case, it is preferable that the slide cam has a multi-stage cam surface that engages with the direction changing member.
[0008]
ADVANTAGE OF THE INVENTION According to this invention, when switching the positioning pin main body which positions a workpiece | work to a hanger so that height may differ, a slide cam is displaced along the sliding direction of the said workpiece | work, and a direction conversion member is engaged. As a result, the positioning pin body displaced integrally with the direction changing member rises to reach the upper end position, and positions the work at this position. On the other hand, if the slide cam is disengaged from the direction changing member, the positioning pin main body can be lowered, and the positioning can be performed at the lower end position.
[0009]
Also, if the cam surface of the slide cam is set in a plurality of steps in stages, it is possible to position the positioning pin main body at a predetermined step even if different types of works are placed on the hanger according to the number of steps. In addition, the work on the hanger can be efficiently processed in a short time, and as a result, versatility can be improved.
[0010]
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.
[0011]
FIG. 1 is a front view showing a work positioning mechanism 10 of a transfer apparatus according to an embodiment of the present invention and a positioning mechanism 24 installed on a transfer path. FIG. 2 is a work positioning mechanism of the transfer apparatus shown in FIG. FIG. 2 is a perspective view of a main part of the mechanism 10.
[0012]
As shown in FIG. 1, in the work positioning mechanism 10 of the transfer device according to the present invention, a body receiving portion 22 is installed on a mounting portion (arm member) 16 b of the arm 16 located to the left of a hanger (not shown). Inside the body receiving portion 22, a positioning mechanism 24 for preventing a displacement of the vehicle body 14 is provided.
[0013]
Further, the bed 12 installed at a specific position on the transport path is driven to be displaced in the horizontal direction and the vertical direction (the arrow C direction, the arrow X direction, and the arrow Y direction in FIG. 1) to operate the positioning mechanism 24. The mechanism 26 is fixed via the bracket 27.
[0014]
Further, the bed 12 has a front-rear direction stopper 18 (FIG. 2) that regulates the position of the arm (arm member) 16 on which the vehicle body 14 is placed by the driving source (not shown) in the front-rear direction (the direction of arrow A and the direction of arrow B in FIG. 2). 1) is provided.
[0015]
Further, the bed 12 is provided with a width direction stopper 20 (see FIG. 1) for regulating the position of the arm 16 in the width direction (the direction of arrow C in FIG. 1) by a driving source (not shown).
[0016]
Reference numeral 31 denotes a displacement device for lowering the positioning mechanism 24. The displacement device 31 includes an actuator 33. The actuator 33 is attached to a bracket 31a fixed to the bed 12 and extending above the positioning mechanism 24. It is fixed. The actuator 33 is actually a cylinder that moves up and down (in the directions of arrows X and Y in FIG. 1). A push plate 33a is attached to the rod end of the actuator 33.
[0017]
3 and 4 show a schematic structure of the positioning mechanism 24. FIG. A horizontal plate 28 is fixed to a side surface (the direction of arrow C in FIG. 1) of the mounting portion 16b of the arm 16. A pair of spaced bosses 28a, 28a are erected on the horizontal plate 28, and the shaft pins 30, 30 are slidably inserted into the respective bosses 28a, 28a. Connecting plates 32, 34 are fixed to the upper and lower ends of the shaft pins 30, 30 by screw members (not shown).
[0018]
A guide member 36 is mounted on the horizontal plate 28 along its axial direction, and a switching slide cam (slide cam) 38 is slidably inserted into the guide member 36. An end of a curved switching lever 40 is fitted into the recess of the switching slide cam 38.
[0019]
The switching slide cam 38 has a tapered surface (cam surface) 38a at one end thereof, and a direction changing member 42 is fixed to the lower surface 32a of the connecting plate 32. At one end of the direction changing member 42, a tapered surface (cam surface) 42a facing the tapered surface 38a of the switching slide cam 38 is provided.
[0020]
FIG. 5 shows a partial longitudinal sectional structure of the positioning pin means 44. A stepped cylindrical portion 46b of a casing 46 is inserted into a hole 32b provided in the connecting plate 32 from below, and the stepped cylindrical portion 46b is fixed to the connecting plate 32 by a screw member 49 via a spacer 47. ing.
[0021]
A guide sleeve 50 is slidably inserted into the hole 46a of the casing 46. One end of a spring member 52 disposed in the hole 46a is seated on the cap 48, and the other end is a hole of the guide sleeve 50. It sits on the end of the part 50a.
[0022]
Therefore, the guide sleeve 50 is always urged upward by the spring member 52 in FIG.
[0023]
Reference numeral 54 denotes a positioning pin main body, and a shaft portion of the positioning pin main body 54 is inserted into a hole 50b of the guide sleeve 50 to have a guide function for the spring member 52, and a conical tip portion of the positioning pin main body 54 has a body shape. 14 (see FIG. 1) is inserted into a hole (not shown).
[0024]
The positioning pin main body 54 is fixed to the guide sleeve 50 by a screw member 56 with a flange portion 54 a provided in the vicinity of the distal end thereof abutting against one end surface of the guide sleeve 50.
[0025]
The spring force of the spring member 52 is set to be larger than the weight of the guide sleeve 50 and the positioning pin body 54, so that the lower end 50 c of the guide sleeve 50 is always in contact with the upper end surface of the hole 46 a of the casing 46. It is pressed.
[0026]
As is clear from the above configuration, the guide sleeve 50 and the positioning pin main body 54 are always kept in a floating state by the elastic force of the spring member 52. In this case, the spring member 52 functions as a cushioning material that reduces the impact force of the positioning pin main body 54 when the positioning pin main body 54 comes down while coming into contact with the vehicle body 14.
[0027]
As shown in FIG. 1, an actuator 62 that moves up and down (in a direction indicated by an arrow X and an arrow Y in FIG. 2) of a bracket 27 (see FIG. 1) fixed to the bed 12 is attached. A plate 64 that curves in an S-shape is attached to 62a.
[0028]
An actuator 68 is fixed to the plate 64, and a moving plate 66 is fixed to a rod 69 extending from the actuator 68. Therefore, when the actuator 68 is urged, the moving plate 66 moves forward and backward in the direction of the arrow AB.
[0029]
The moving plate 66 is provided with a pair of clamp claws 70a and 70b separated by a predetermined distance. The clamp claws 70a, 70b are pivoted rearward (in the direction of arrow B in FIG. 2) via cams 72a, 72b rotatably engaged with the moving plate 66 to rise up, and the cams 72a, 72b are raised. When the support by the cams 72a and 72b is released due to the rotation of the cam 72a, the cam 72a falls down in the front direction (the direction of the arrow A in FIG. 2). The cams 72a and 72b rotate in conjunction with a driving source (not shown).
[0030]
The work positioning mechanism 10 of the transfer device according to the embodiment of the present invention is basically configured as described above. Next, the operation and operation and effect thereof will be described.
[0031]
First, a case where the positioning pin main body 54 is located at the lower end (indicated by a solid line in FIG. 4) in the work positioning mechanism 10 of the transfer device according to the embodiment of the present invention will be described.
[0032]
In this case, when the upper end position and the lower end position of the positioning pin main body 54 are detected by a detection device (not shown), it is preferable in relation to another control system.
[0033]
For example, the detection device (not shown) confirms that the positioning pin main body 54 is located at the lower end, and the actuator 62 is driven. As a result, the rod 62a of the actuator 62 rises to raise the actuator 68 integrally with the moving plate 66 via the plate 64 fixed to the rod 62a, and the clamp claws 70a, 70b Is displaced upward (in the direction of the arrow X in FIG. 2) to a position facing.
[0034]
At this time, when the switching lever 40 is displaced with the movement of the arm 16, the cam 72b is rotated by the drive source (not shown), and the clamp claw 70b is turned over. This is to avoid interference with the switching lever 40.
[0035]
In this state, the vehicle body 14 placed at a predetermined position of the body receiving portion 22 is transported via a rail (not shown), and the arm 16 is stopped with the vehicle body 14 moved to the predetermined position.
[0036]
Next, under the urging action of a drive source (not shown), the front-rear direction stopper 18 sandwiches the lower portion 16a of the arm 16 to regulate the position of the arm 16 in the front-rear direction (the direction of arrows A and B in FIG. 2). . Further, the side surface of the mounting portion 16b of the arm 16 is pressed by the width direction stopper 20 by a driving source (not shown), and the position of the arm 16 in the width direction (the direction of arrow C in FIG. 1) is regulated.
[0037]
For this reason, the position of the arm 16 in the front-rear direction and the width direction is regulated, and the arm 16 is stopped at a predetermined position. In this case, the switching lever 40 is located between the clamp claws 70a and 70b. Therefore, the cams 72a and 72b are rotated under the action of a drive source (not shown), and thereby the clamp claws 70a and 70b are raised.
[0038]
Next, when the actuator 68 is operated and the clamp pawls 70a and 70b are displaced in the forward direction (the direction of the arrow A in FIG. 2) while the clamp pawls 70a and 70b are raised by the moving plate 66, the clamp pawls 70b contact the switching lever 40 and the rod The switching lever 40 moves forward (in the direction of arrow A in FIG. 2) by the displacement operation of 69.
[0039]
As a result, the switching slide cam 38 is displaced forward through the switching lever 40, and its tapered surface 38a engages with the tapered surface 42a of the direction changing member 42, and the connecting plate fixed to the direction changing member 42. 32 is raised. As a result, the positioning pin main body 54 is displaced upward (in the direction of the arrow X in FIG. 2) using the shaft pins 30, 30 as a guide, and reaches the upper end thereof (see the two-dot chain line in FIG. 3).
[0040]
As a result, the position of the positioning mechanism 24 switches from the lower end to the upper end, the positioning pin main body 54 of the positioning pin means 44 enters a not-shown hole of the vehicle body 14 (see FIG. 1), and the vehicle body 14 Installed in
[0041]
Next, a case where the position of the positioning mechanism 24 is switched from the upper end to the lower end will be described.
[0042]
The actuator 68 is operated, and the rod 69 displaces the moving plate 66. Based on this operation, the clamp claws 70a and 70b are displaced rearward (the direction of the arrow B in FIG. 2), and the clamp claws 70a abut on the switching lever 40. Further, the switching lever 40 is displaced with the movement of the clamp pawl 70a under the urging action of the actuator 68, and the switching slide cam 38 moves rearward (the direction of the arrow B in FIG. 2) via the switching lever 40. .
[0043]
As a result, the tapered surface 38a of the switching slide cam 38 is disengaged from the tapered surface 42a of the direction changing member 42, and the engagement between the switching slide cam 38 and the direction changing member 42 is released.
[0044]
Next, under the action of the actuator 33, the pressing plate 33a presses the upper part of the positioning mechanism 24, for example, the connecting plate 32, and the lower surface 32a of the connecting plate 32 contacts the upper end surface of the boss portion 28a, and the positioning pin main body 54 The position switches from the upper end to the lower end.
[0045]
In the present embodiment, when the positioning mechanism 24 for positioning the vehicle body 14 on the arm 16 is switched to the lower or upper position, the switching slide cam 38 is engaged with the direction changing member 42. Then, the positioning mechanism 24 is displaced via the connecting plate 32 fixed to the direction changing member 42.
[0046]
As is clear from the above, the positioning main body 54 constituting the positioning mechanism 24 can be displaced up and down with a simple configuration. Therefore, even when different vehicle bodies are transported, there is no need to manually adjust the position of the positioning pin main body 54 each time, so that it is possible to cope with various types of works.
[0047]
FIG. 6 shows the shape of the switching slide cams 58 and 60 according to another embodiment. In this case, the switching slide cam 58 includes two-stage engagement surfaces (cam surfaces) 58a and 58b that engage with the tapered surface 42a of the direction changing member 42, while the switching slide cam 60 is indicated by a chain line. As described above, three-stage engaging surfaces (cam surfaces) 60a, 60b, and 60c that engage with the tapered surface 42a of the direction changing member 42 are provided.
[0048]
Therefore, when the position of the positioning mechanism 24 is set in a stepwise manner in the upward direction (the direction of the arrow X in FIGS. 2 and 4) depending on the type of the body, which is a work, if the switching slide cams 58 and 60 are selected and used, a number of It is possible to cope with various types of vehicle bodies, for example, the vehicle bodies 14 and 14a, and it becomes easy to process the vehicle body under small-lot production of many models, and versatility can be improved.
[0049]
【The invention's effect】
As described above, according to the present invention, when switching the positioning pin main body for positioning a workpiece to a plurality of positions in accordance with different workpieces, the slide cam and the direction changing member are used to switch the positioning pin with a simple configuration and a simple switching operation. It can be positioned at a predetermined height.
[0050]
In addition, since the position of the positioning mechanism can be set in multiple stages, even if different types of workpieces are transported, the workpieces can be efficiently positioned on the hanger in a short time. Processing work can be performed quickly on the work.
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic structure of a work positioning mechanism of a transfer device according to the present embodiment.
FIG. 2 is a perspective view of a main part of a work positioning mechanism of the transfer device of FIG. 1;
FIG. 3 is a front view showing a schematic structure of a positioning mechanism constituting a work positioning mechanism of the transfer device of FIG. 2;
FIG. 4 is a side view of the positioning mechanism of FIG.
FIG. 5 is a schematic vertical sectional view of a positioning pin means constituting a work positioning mechanism of the transfer device of FIG. 2;
FIG. 6 is a schematic side view showing a modification of a switching slide cam in the work positioning mechanism of the transfer device shown in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Work positioning mechanism of conveyance apparatus 12 ... Bed 14, 14a ... Body 16 ... Arm 18 ... Front-back direction stopper 20 ... Width direction stopper 24 ... Positioning mechanism 26 ... Driving mechanism 30 ... Shaft pins 33, 62, 68 ... Actuator 38, 58, 60: switching slide cam 40: switching lever 42: direction changing member 44: positioning pin means 54: positioning pin main body 70a, 70b: clamp pawls 72a, 72b: cam

Claims (2)

A work positioning mechanism that is provided in a transfer device that transfers the work and includes a positioning pin for positioning the work.
Positioning pin body,
A slide cam having cam surfaces of different heights,
A direction changing member that engages with the slide cam and is displaced in a direction different from the sliding direction;
Wherein the positioning pin body moves integrally with the direction changing member to position the work at different positions with respect to different types of work. The work positioning mechanism of the transfer device according to claim 1,
The slide cam has a multi-stage cam surface that engages with a direction changing member.

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