JPH0343167B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When transferring a large object such as a car body or a vehicle from an overhead conveyor to a cart, etc., the present invention has a method of adjusting the position so that it is placed on the cart, etc. in the correct position. The present invention relates to a device for performing

As a conventional position adjustment device for large objects to be transported,
For example, it is possible to slide in a direction (referred to as the X-axis direction) perpendicular to the direction in which the conveyed object moves (back and forth), and is driven by a pressure cylinder to slide in the X-axis direction.
a second sliding member that is provided on the first sliding member and is slidable in the traveling direction of the conveyed object (the Y-axis direction), and that is driven by a pressing cylinder to slide in the Y-axis direction. Some devices include a sliding member and a conveyed object receiving member provided at the upper end of the second sliding member. In such a device, a conveyed object (for example, an automobile body) conveyed by an overhead conveyor or the like is placed on the conveyed object receiving member, and the conveyed object is first moved by the first sliding member. The position is adjusted in the X-axis direction, and then the second sliding member is operated to adjust the position in the Y-axis direction. The transported object whose position has been adjusted in this way is transferred to a trolley or the like while maintaining that state.

However, in the case of such a conventional conveyance object position adjustment device, the conveyance object is
Although it is equipped with a sliding member for moving in the axial direction, it does not have a means for rotating it, so when the transported object is slightly rotated with respect to the If it is placed on
When adjusting the position in the X-axis and Y-axis directions, the position in the rotational direction must be adjusted by sliding the conveyed object on the conveyed object receiving member. As a result, the paint on the transported object may peel off or the flange portion may become bent due to friction at the contact portion between the transported object and the transported object receiving member. Furthermore, the conveyed object receiving member may be damaged.

This invention was made by focusing on such conventional problems, and includes a device for adjusting the position of a conveyed object, which is capable of sliding in a predetermined direction on a horizontal plane and is normally maintained at a neutral position in that direction by a return spring. a second sliding member that is slidable in a direction perpendicular to the sliding direction of the first sliding member and that normally maintains a neutral position in the direction by a return spring; a third sliding member that is rotatable in a horizontal plane with respect to the member and normally maintains a neutral position in the rotational direction by a return spring; a conveyed object receiving member provided at the upper end of the third sliding member; It is equipped with a plurality of conveyed object receiving units each supported by a support base, and each of the conveyed object receiving units appropriately presses the conveyed object placed on the conveyed object receiving member to place it in the normal position. It is an object of the present invention to solve the above-mentioned problems by having a cylinder that is adjusted to the direction of the load, and having a structure in which the cylinder device is integrally supported by the support table and the conveyed object receiving unit.

The present invention will be explained below based on the drawings. 1 to 7 are diagrams showing an embodiment of the present invention. To begin with, the construction will be described. In FIGS. 1 to 4, reference numeral 1 designates a first slide bearing bracket as a support base, and a sill bracket 2 is fixed to one end of the bracket with a bolt 3. Two pairs of protrusions 4, 4 are provided on both ends of the upper surface of the first slide bearing bracket 1, and rods 5, 5 are installed parallel to each other between the respective pairs of protrusions 4, 4. There is. Furthermore, a slide base 6 is fixed to the upper surface of the first slide bearing bracket 1 at an intermediate position between the rods 5, 5, and the slide base 6 extends parallel to the rods 5, 5. A slider 7 is provided on the slide base 6 so as to be slidable in the extending direction of the slide base 6, and the slide base 6 and the slider 7 are combined to form a first slide bearing 8 as a first sliding member. It consists of
A second slide bearing bracket 9 is fixed on the slider 7 and is adapted to slide together with the slider 7. Projections 11, 11 each having a through hole 10 are provided at both ends of the lower surface of the second slide bearing bracket 9, and the rods 5, 5 are inserted into the through hole 10, respectively. Furthermore, these protrusions 11, 11
and the respective protrusions 4, 4 supporting both ends of the rods 5, 5, respectively.
a first return coil compression spring 12, 12 as a first return means in a state surrounding the periphery of the first return coil compression spring 12;
is mounted, and the second slide bearing bracket 9 is always biased via the protrusions 11, 11 so as to be located at a neutral position in the sliding direction. A pair of slide bases 13, 13 are fixed to the upper surface of the second slide bearing bracket 9, and each extends in a direction perpendicular to the sliding direction of the second slide bearing bracket 9.
A slider 14 is provided on each slide base 13 so as to be slidable in the extending direction of the slide base 13, and each slide base 13 and slider 14 are combined to form a second slide bearing 15 as a second sliding member. It consists of A third slide bearing bracket 18 is fixed astride both sliders 14, and is capable of sliding together with both sliders 14. This third slide bearing bracket 18 has holes 19, 19 provided in its center from both sides in the sliding direction. Hole 19, 19
One end of a second return coil compression spring 20, 20 as a second return means is inserted into the second return coil compression spring 2, respectively.
The other ends of 0 and 20 are fixed by bolts 21 and 21 fixed to both end walls 9a and 9b of the second slide bearing bracket 9, respectively. As a result, the third slide bearing bracket 18 is compressed by both of these second return coil compression springs 20, 2.
0, and is always located at a neutral position in the sliding direction. Further, a rotary bearing 24 as a third sliding member is attached to the upper surface of the third slide bearing bracket 18. A pedestal 25 serving as a conveyed object receiving member is fixed to the upper end of the rotary bearing 24, and can rotate together with the rotation of the rotary bearing 24. A cushioning rubber plate 26 is attached to the upper surface of the pedestal 25. There is a space between a protrusion 25a formed to protrude downward from one end of the lower surface of the pedestal 25 and a protrusion 18a formed to protrude upward from one end of the upper surface of the third slide bearing bracket 18. , third return coil compression springs 27, 2 as a pair of third return means sandwiching the rotating bearing 24.
7 is attached, and the pedestal 25 is always biased to be located at a neutral position in its rotational direction. The first slide bearing bracket 1 to the third
The members up to the return coil compression springs 27, 27 are combined together to form the conveyed object receiving unit 2.
8. On the other hand, numeral 31 is a fluid pressure operated cylinder which is fixed to the cylinder bracket 2 and whose operation is controlled by a known control device (not shown). A plate 32 for pressing the conveyed object is attached to the tip of the piston rod 31a of this cylinder 31, and as the piston rod 31a moves, the plate 32 moves in the direction of the pedestal 25 (the same direction as the sliding direction of the second slide bearing 15). It is now possible to move forward and backward. This cylinder 31 and the conveyed object receiving unit 28 are combined to constitute a conveyed object position adjustment device 33. FIGS. 5 to 7 show a plurality of such transport object position adjusting devices 33 mounted on a table lifter that can be raised and lowered via a mounting jig. That is, in FIG. 5, numeral 35 is an overhead conveyor installed in an automobile body assembly factory, and numeral 36 is an overhead conveyor 35 that conveys an automobile body (hereinafter simply referred to as a car body) 37 from the overhead conveyor 35 to a bogie 3.
This is a drop lifter for transferring onto the 8. Trolley 38
The wheels 4 run on the rails 40 laid on the floor surface 39.
1. 43 is a pit provided under the floor surface in accordance with the position of the drop lifter 36, and 44 is a known table lifter installed in the pit 43 that can be raised and lowered. On this table lifter 44, there is a position adjustment device 3 for conveyed objects.
3 are attached via attachment jigs 45 so as to sandwich the truck 38 from both sides, as shown in FIG. Some of these position adjusting devices 33 are arranged so that the piston rods 31a of the cylinders 31 move back and forth in the same direction as the traveling direction (Y-axis direction) of the truck 38, and the rest are arranged perpendicularly to the traveling direction of the truck 38. It is installed so that it can move forward and backward in the direction (X-axis direction). Further, the pedestal 25 of the position adjustment device 33 is located above the gauge plate 47 of the vehicle body support device 46 provided on the truck 38 when the table lifter 44 has risen to its upper limit,
When the table lifter 44 is lowered to its lower limit, it is positioned below the gauge plate 47. Reference numeral 48 denotes a light emitting device attached to a frame (not shown) for detecting displacement of the vehicle body 37 placed on the pedestal 25 of the position adjustment device 33 in the Y-axis direction (back and forth direction, that is, the traveling direction of the truck 38). This is a known photoelectric detection device consisting of a receiver 49 and a light receiver 50.

Next, the effect will be explained. When the empty cart 38 stops at a fixed position, the table lifter 44 provided with the position adjustment device 33 rises to its upper limit. The vehicle body 37 conveyed by the overhead conveyor 35 is transferred to the drop lifter 3 as shown in FIG.
6 is placed on the rubber plate 26 of the pedestal 25 of the position adjustment device 33. At this time, the vehicle body 37 is shifted in the X-axis direction and the Y-axis direction from the normal position when it is placed on the trolley 38. First, among the cylinders 31 of the position adjustment device 33, the piston rod 31a of the one facing the X-axis direction is controlled by a control device (not shown) and moves forward by a predetermined stroke, and the plate 32 at the tip of the vehicle body 3 is displaced.
7 from the X-axis direction (both sides) as shown in FIG. In that case, the position adjustment device 33 includes first and second slide bearings 8 and 15 for sliding the vehicle body 37 along with the cradle 25 in the X-axis direction and the Y-axis direction, and
7 Rotating bearing 2 that rotates the entire pedestal 25
4 are provided, the cradle 25 freely moves along with the movement of the vehicle body 37 in the X direction and rotational direction. Therefore, the car body 37 is the pedestal 25
without frictional sliding between the rubber plate 26 of
Misalignments in the X-axis direction and rotational direction can be corrected. The photoelectric detection device 48 detects the displacement in the Y-axis direction of the vehicle body 37 whose displacements in the X-axis direction and rotational direction have been corrected in this way. When the vehicle body 37 is displaced in the Y-axis direction, the control device (not shown) is actuated by a signal from the detection device 48, and the cylinder 31 is oriented in the Y-axis direction. The corresponding piston rod 31a is moved forward by the required stroke to press the vehicle body 37 and correct the deviation in the Y-axis direction.

When the position adjustment of the vehicle body 37 is completed, the table lifter 44 is lowered to its lower limit. During the descent of the table lifter 44, the vehicle body 37 is transferred from the cradle 25 of the position adjustment device 33 onto the gauge plate 47 of the vehicle body support device 46 provided on the truck 38 without causing any positional deviation. When the transfer is completed, the piston rods 31a of all the position adjustment devices 33 are retracted, and each sliding member returns to its neutral position. Then, when the truck 38 carrying the car body 37 moves and a new empty truck 38 stops at a fixed position,
The table lifter 44 rises again to its upper limit, and the above-described operation is repeated.

As described above, according to the present invention, the conveyed object position adjusting device can be slid in a predetermined direction on a horizontal plane, and the first sliding means can normally maintain the neutral position in the direction by the first return means. a second sliding member which is slidable in a direction perpendicular to the direction of sliding of the first sliding member and which normally maintains a neutral position in said direction by means of a second return means; a third sliding member that is rotatable in a horizontal plane with respect to the member and normally maintains a neutral position in the rotational direction by a third return means; and a conveyed object receptacle provided at the upper end of the third sliding member. and a plurality of conveyed object receiving units each supported by a support base, each of the conveyed object receiving units appropriately pressing the conveyed object placed on the conveyed object receiving member. Since the cylinder device is configured to be integrally supported by the support base and the conveyed object receiving unit, the conveyed object placed on the conveyed object receiving member and the conveyed object are The position of the conveyed object can be adjusted without causing any relative movement between it and the receiving member. As a result, it is possible to prevent the paint on the transported object from peeling off or the flange portion that is the contact part of the transported object from bending due to friction between the transported object and the transported object receiving member, and also prevent the conveyed object from being bent. It is also possible to prevent a situation where the member is damaged. Further, since the cylinder device and the conveyed object receiving unit are integrally supported on the support base, the position adjustment device can be made compact and the degree of freedom in its installation can be increased.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the conveyance object position adjustment device according to the present invention, FIG. 2 is a front view of the conveyance object position adjustment device shown in FIG. 1, and FIG. FIG. 4 is a plan view of the object position adjustment device, FIG. 4 is a side view of the object position adjustment device shown in FIG. 1, and FIG. FIG. 6 is an enlarged view of a portion of FIG. 5, and FIG. 7 is a cross-sectional view taken along the - arrow in FIG. 6. DESCRIPTION OF SYMBOLS 1... First slide bearing bracket (support stand), 8... First slide bearing as a first sliding member, 12... First return coil spring as first return means, 15... Second a second slide bearing as a sliding member, 20;
...second return coil spring as second return means, 24...rotary bearing as third sliding member, 25...receiver as conveyed object receiving member, 27...as third return means Third return coil spring, 28... conveyed object receiving unit,
31... Cylinder, 33... Position adjustment device for conveyed object, 37... Automobile body as conveyed object.

Claims (1)

[Claims] 1. A first sliding member that is slidable in a predetermined direction on a horizontal plane and always maintains a neutral position in that direction by a first return means, and a first sliding member that slides in a direction perpendicular to the sliding direction of the first sliding member. a second sliding member which is capable of rotating in a horizontal plane with respect to the second sliding member and which is always maintained at a neutral position in the direction by a second returning means; The third one maintains the neutral position in the direction of rotation.
a sliding member, and a conveyed object receiving member provided at the upper end of the third sliding member, and is provided with a plurality of conveyed object receiving units each supported by a support stand, and the conveyed object receiving unit each has a cylinder device that appropriately presses the transported object placed on the transported object receiving member to adjust it to a normal position, and the cylinder device is integrally supported by the support base with the transported object receiving unit. A position adjustment device for conveyed objects, characterized in that: