JP6008122B2 - Horizontal leveling device for workpieces on a transport carriage - Google Patents

Description

  The present invention relates to an apparatus for leveling a workpiece on a conveyance carriage stopped at a work position, and particularly on a conveyance carriage suitable for an application that requires high-precision horizontal leveling of a heavy workpiece. The present invention relates to a device for leveling a workpiece.

  Moves along the transfer path with the workpiece placed on the carrier, and stops at the workpiece delivery position (delivery station) and the work position (work station) with respect to the workpiece. A lifting body that is lifted and lowered by a lifter is provided, and a loading platform on which legs are attached is placed on the lifting body. At the workpiece transfer position, the lifting body and loading platform are lowered by the lifter and have an inverted conical circumferential surface on the lower surface of the leg. Positioning on the horizontal surface by engaging the concave portion with an engaging convex portion for positioning to the ground loading platform having a conical top surface provided on the floor surface, and a male screw formed on the outer peripheral surface of the engaging convex portion is a female screw A device equipped with a height adjustment mechanism that adjusts the height of the engaging convex portion by screwing into a cylinder, loosening a set screw, and rotating the engaging convex portion (for example, Patent Documents) (Refer to the work position for the workpiece) Positioning the loading platform on which the workpiece is placed by the workpiece positioning device provided on the ground side, that is, in the horizontal direction perpendicular to the conveyance path by the advance / retreat mechanism provided at the work position of the conveyance path There is a type in which an elevating mechanism is erected on a moving table that moves forward and backward, and a positioning pin of the elevating mechanism is inserted into a positioning pin hole of a cargo bed for positioning (for example, see Patent Document 2).

JP-A-7-223536 Japanese Examined Patent Publication No. 7-080565

For example, when a high-precision workpiece is assembled and inspected on a transport carriage, for example, a high-precision horizontal level (for example, about several tens of μm) may be required at a work position where the assembly inspection is performed. .
However, in the positioning device as in Patent Document 1, the height adjustment mechanism is configured to adjust the height of the engaging convex portion on which the four legs of the loading platform are placed and engaged with each other by using a screw. Even if the mechanism is provided at the work position with respect to the workpiece, it is very difficult to perform a high-precision horizontal leveling, and the manufacturing cost increases because it is necessary to provide lifters on all the transport carriages.
Further, in a positioning device such as that disclosed in Patent Document 2, in a state in which positioning in the height direction is performed by a lifting mechanism provided on the ground side at a work position with respect to a workpiece, left and right lifting that expands and contracts in the vertical direction, which is an actuator of the lifting mechanism. Since the cylinder is deformed, it is very difficult to obtain a highly accurate horizontal level.

  Accordingly, in view of the above-described situation, the present invention intends to solve the problem by easily performing a high-accuracy horizontal leveling of a work, which is a heavy object on the transport carriage, in a state where the transport carriage is stopped at a work position with respect to the work. An object of the present invention is to provide a horizontal leveling device for a work on a transport carriage.

  In order to solve the above problem, the horizontal leveling device for a work on a transport carriage according to the present invention performs the horizontal leveling of the work in a state where the transport carriage on which the work is placed is stopped at a work position. The feeding cart includes a workpiece support that supports the workpiece from below, a pallet that supports the workpiece support from below, and a conveyance table that supports the pallet from below. There is a front / rear / left / right work support supported so as to be slidable between a lifting drive device that pushes up the lower surface of the pallet and a position directly below the lower surface of the work support and a position retracted from the position immediately below the work position. A lift receiving device, and a slide driving device that slides the workpiece support receiving seat, wherein the transporting carriage is stopped at the working position. Raising and pushing up the lower surface of the pallet, and lowering the lifting and lowering driving device with the slide driving device sliding the workpiece support seat to a position directly below the lower surface of the workpiece supporting tool raised together with the pallet Then, the work support tool is placed on the work support tool seat, and the horizontal level of the work is set.

According to such a configuration, since the lifting drive device is installed on the ground side at the work position, the transport cart can be reduced in weight and manufactured cost compared to a configuration in which lifters (lifting drive devices) are provided on all the transport carts. Can be reduced.
In addition, the work support is movable upward relative to the carriage and the pallet at the work position, and the work support is placed on the front, back, left, and right work support receiving seats so that the horizontal level of the work is reached. Since it is a structure which takes out, the workpiece | work support receiving seat of the front, back, left, and right at the time of installation can carry out the high-precision horizontal leveling of the workpiece | work in a working position reliably by carrying out the horizontal level with high accuracy.

Here, it is preferable that the workpiece support is separated into front, rear, left and right for each of the front, rear, left and right workpiece support receiving seats.
According to such a configuration, the work is supported by the front / rear / left / right work supports separated into the front / rear / right / left, and the front / rear / left / right work supports are placed on the front / rear / left / right work support receiving seats to set the horizontal level of the work. Therefore, when the work support tool has an integral structure, there is no problem that the accuracy of horizontal leveling cannot be ensured due to distortion of the work support tool itself, and it is easy to ensure the accuracy of horizontal leveling. In addition, the simple configuration can improve the reliability and reduce the weight of the transport carriage.

Moreover, it is preferable that the transfer platform of the transfer cart is a work floor on which an operator rides and the upper surface of the transfer platform and the upper surface of the pallet are substantially flush with each other.
According to such a configuration, since the work floor is formed to be substantially flat, the workability of the worker who works on the workpiece while riding on the work floor is improved.

  As described above, according to the horizontal leveling device for a workpiece on the transport carriage according to the present invention, (a) since the lifting drive device is installed on the ground side at the work position, Compared with a configuration in which a drive device is provided, the conveyance carriage can be reduced in weight and the manufacturing cost can be reduced. Since it is configured to level out, by accurately leveling the front, back, left, and right workpiece support seats, it is possible to reliably perform high-precision horizontal leveling of the workpiece at the work position, etc. Has a remarkable effect.

It is a schematic plan view of the horizontal leveling apparatus of the workpiece | work on the conveyance trolley | bogie which concerns on embodiment of this invention. It is a schematic plan view which expands and shows only one conveyance trolley stopped at the work position. It is a disassembled perspective view of a workpiece | work support tool, a pallet, and a conveyance stand. It is a schematic front view which shows the structure of the apparatus installed in a conveyance trolley and a work position. It is a principal part enlarged front view which shows the structure of the apparatus installed in a work position, (a) has shown the state which the raising / lowering drive device lowered | hung, (b) has shown the state which the raising / lowering drive device raised. It is the principal part enlarged view which looked at the conveyance trolley in the state where the lower surface of the pallet was pushed up by the raising / lowering drive device. It is a schematic plan view which expands and shows only one conveyance trolley stopped at the work position, and shows a state where the work support receiving seat is driven by the slide driving device and moved to a position directly below the lower surface of the work support. Yes. It is a principal part enlarged plan view which shows the structural example of a slide drive device, (a) is a position where a workpiece support seat is in the position retracted from the position directly under the lower surface of a workpiece support, (b) is a workpiece support receptacle. The case where the seat is in the position directly under the lower surface of the workpiece support is shown. It is the principal part enlarged view seen from back which shows the state which lowered the raising / lowering drive device and mounted the workpiece support on the workpiece support seat.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste.
In this specification, the transport direction of the transport carriages 1, 1,... (Refer to arrow F in the figure) is the front, the opposite side is the rear, and the left and right are forwards. The figure is the front view.

As shown in the schematic plan view of FIG. 1, the transport carriages 1, 1,... Engage with guide rollers 10 laid along the transport path with guide rollers 12, 12,. As shown in the schematic plan view of FIG. 4 and the schematic front view of FIG. 4, the traveling wheels 11, 11,... It is movable along the conveyance path, and is driven by a driving device (not shown) (for example, a friction roller type driving device that drives the left and right side surfaces 4B, 4B of the conveyance table 4 with a friction roller) (see arrow F in the figure). )).
The transport carts 1, 1,... Stop at the work position A, and the level of the workpiece W on the transport cart 1 on the transport cart 1 according to an embodiment of the present invention, which will be described in detail later, is used to level the work W that is a heavy object. In a state where leveling is performed, an operator or the like riding on the carriages 4, 4,.

As shown in the exploded perspective view of FIG. 3, a rectangular pallet 3 is inserted from above into a rectangular opening 4C formed in the center of the transport table 4 and applied to the front, rear, left and right step portions 4D, 4D,. Since it is stopped, the pallet 3 is supported from below by the carriage 4.
Further, the front and rear, left and right of the pallet 3 are formed with protrusions 3C, 3C,... Which protrude downward and are long in the front-rear direction. ,... Are formed, and the engaging projections 2C, 2C,... Of the work supports 2, 2,.
Furthermore, since the diameter-expanded flange is formed in the upper end part of the workpiece supports 2, 2,..., The front, rear, left, and right workpiece supports 2, 2,.
Further, the workpiece W is placed on the upper surfaces 2A, 2A,... Of the workpiece supports 2, 2,.
Therefore, the conveyance carriage 1 supports the workpiece support 2, 2,... That supports the workpiece W from below, the pallet 3 that supports the workpiece support 2, 2,. A stand 4 is provided.
Here, as shown in the schematic front view of FIG. 4, the workpiece support 2 protrudes downward from the lower surface 3B of the pallet 3 (the lower surface of the convex portion 3C), that is, the lower surface 2B of the workpiece support 2 is the pallet. 3 is located below the lower surface 3B (the lower surface of the convex portion 3C).

Next, the detail of the structure of the apparatus installed in the work position A is demonstrated.
As shown in the plan view of FIG. 2 and the enlarged front view of the main part of FIG. 5, the working position A is lifted up and down and left and right to push up the front and rear lower surfaces 3B, 3B,... Of the pallet 3 shown in FIGS. , Left and right between the positions directly below the lower surfaces 2B, 2B,... Of the front and rear work supports 2, 2,... Shown in FIGS. .., Slidably supported by the linear guide 7, front and rear, left and right workpiece support receptacles 6, 6..., Leveling blocks 8, 8. , 6,... Are installed.

The elevating drive device 5 is, for example, a hydraulic cylinder, and the telescopic rod is in a state where the telescopic rod is lowered as shown in the enlarged front view of the main part in FIG. 5A or in the enlarged front view of the main part in FIG. It goes up.
As shown in the main part enlarged front view of FIG. 5 and the main part enlarged view seen from the rear of FIG. 6, the work support receiving seat 6 is fixed to the guide block 7 </ b> A of the linear guide 7, and the rail base 13 is fixed to the linear guide 7. Since the rail base 13 is fixed to the upper member 8B of the leveling block 8, the workpiece support seat 6 is slidably supported by the linear guide 7 as described above.
For example, the leveling block 8 can advance and retract the lower member 8C formed with an inclined surface abutting against the inclined surface of the upper member 8B with respect to the base member 8A and the upper member 8B by the adjusting screw 8D.
Therefore, by operating the adjustment screw 8D, the position adjustment of the leveling block 8 in the height direction, that is, the horizontal leveling of the workpiece support seat 6 can be easily and accurately performed.

As shown in the enlarged front view of the main part in FIG. 5 and the enlarged plan view of the main part in FIG.
The base end side of the air cylinder 14 is supported by a swing support shaft 14A so as to be swingable about a vertical axis, and the distal end fitting of the telescopic rod of the air cylinder 14 is connected to the swing support shaft 14B so as to be swingable about a vertical axis. Is done.
One end of the link 15 is supported by the swing support shaft 15A so as to be swingable about the vertical axis, and the other end of the link 15 is connected to the swing support shaft 14B so as to be swingable about the vertical axis. One end of the link 16 is swingably connected about the vertical axis by a swing support shaft 16A connected to the workpiece support seat 6, and the other end of the link 16 is connected to the swing support shaft 14B so as to swing about the vertical axis. Is done.
Accordingly, the links 15 and 16 and the work support receiving seat 6 are interlocked with the expansion and contraction of the telescopic rod of the air cylinder 14, and the telescopic rod of the air cylinder 14 is contracted (retracted) as shown in FIG. The support tool seat 6 slides from a position immediately below the lower surface 2B of the work support tool 2 to a retracted position, and the telescopic rod of the air cylinder 14 extends (advances) as shown in FIG. The seat 6 slides to a position directly below the lower surface 2B of the work support 2 (see also the schematic plan view of FIG. 7).
The devices installed at the work position A as described above (elevating drive device 5, work support receiving seat 6, linear guide 7 and leveling block 8, etc., and slide drive device 9) are distributed at the required locations. In addition, since it is small and has a low height, it is possible to reduce the floor of the transport device.

Next, details of the operation of the horizontal leveling device for the workpiece W on the transport carriage 1 according to the embodiment of the present invention will be described.
As shown in FIG. 5B, the front and rear lifting / lowering drive devices 5, 5,... Are lifted up and down the front and rear of the pallet 3 with respect to the carriage 1 stopped at the work position A as shown in FIGS. When the left and right lower surfaces 3B, 3B,... Are pushed up, the work supports 2, 2,... Supported on the pallet 3 as shown in FIG. It becomes higher than the upper surface of 6.
Next, as shown in FIGS. 7 and 8B, the slide drive device 9 is driven so that the front, rear, left and right workpiece support receiving seats 6, 6,. Slide to a position directly below 2B, 2B,.
Next, when the telescopic rods are lowered as shown in FIG. 5 (a) in the front / rear / right / left elevating drive devices 5, 5,... Are mounted on the front, rear, left and right workpiece support seats 6, 6,..., And in this state, the front, rear, left and right workpiece supports 2, 2,. Therefore, the workpiece W is in a state of being leveled by the ground-side workpiece support seats 6, 6,...

After carrying out the required work on the workpiece W with the workpiece W leveled out in this way, when the carriage 1 is transported, the front and rear drive devices 5, 5,. As shown in FIG. 8 (a), the telescopic rod is raised and the front, rear, left and right lower surfaces 3B, 3B,... of the pallet 3 are pushed up, and the slide drive device 9 is driven as shown in FIG. Are slid from the position directly below the lower surfaces 2B, 2B,... Of the front, rear, left and right work supports 2, 2,.
In this state, as shown in FIGS. 2 and 4, since the carriage 1 has returned to the state when stopped at the work position A, the carriage 1 can be moved by a driving device such as a friction roller type driving device. it can.

According to the horizontal leveling device for the workpiece W on the transport carriage 1 as described above, since the elevating drive devices 5, 5,... Are installed on the ground side at the work position A, the transport carriages 1, 1,. Compared to a configuration in which all the lifters (lifting / lowering drive devices) are provided, the transport carts 1, 1,.
Further, the work supports 2, 2,... Can be moved relatively upward with respect to the carriage 4 and the pallet 3 at the work position A, and the work supports 2, 2,. Since the work W is leveled by placing it on the seats 6, 6,..., The front, rear, left and right work support receiving seats 6, 6,. Therefore, it is possible to reliably perform the horizontal leveling of the workpiece W at the work position A with high accuracy.

Further, since the work support tools 2, 2,... Are provided separately in the front, rear, left, and right for each of the front, rear, left, and right work support seats 6, 6,. The workpiece W is supported by 2,..., And the front, rear, left and right workpiece supports 2, 2,... Are placed on the front, rear, left and right workpiece support receptacles 6, 6,. Therefore, in the case of a workpiece support tool having an integral structure, there is no problem that the accuracy of leveling cannot be ensured due to distortion of the work support itself, and it is easy to ensure the accuracy of leveling. In addition, the simple configuration can improve the reliability and reduce the weight of the transport carriage.
Further, the transport platform 4 of the transport cart 1 is used as a work floor on which an operator rides, and as shown in FIGS. 3 and 9, the upper surface 4A of the transport table 4 and the upper surface 3A of the pallet 3 are formed substantially flush with each other. Therefore, since the work floor is formed substantially flat, the workability of the worker who works on the work W while riding on the work floor is improved.

A Work position F Transport direction W Work 1 Transport cart 2 Work support 2A Upper surface 2B Lower surface 2C Engagement convex part 3 Pallet 3A Upper surface 3B Lower surface 3C Convex part 3D Engagement hole 4 Transport base 4A Upper surface 4B Side surface 4C Opening 4D Step part 5 Lifting drive device 6 Work support receiving seat 7 Linear guide 7A Guide block 7B Guide rail 8 Leveling block 8A Base member 8B Upper member 8C Lower member 8D Adjustment screw 9 Slide drive device 10 Guide rail 11 Traveling wheel 12 Guide roller 13 Rail base 14 Air cylinders 14A, 14B Swing support shafts 15, 16 Links 15A, 16A Swing support shafts

Claims (3)

A horizontal leveling device for leveling the workpiece in a state where the conveyance carriage on which the workpiece is placed is stopped at the work position,
The transport carriage includes a work support that supports the work from below, a pallet that supports the work support from below, and a transport base that supports the pallet from below.
Front / rear / left / right work support receivers supported so as to be slidable between a lifting drive device that pushes up the lower surface of the pallet at the work position, and a position immediately below and below the position of the work support tool. A seat and a slide drive device that slides the workpiece support receiving seat,
With the transport carriage stopped at the work position, the lift drive device is raised to push up the lower surface of the pallet, and the slide drive device moves the pallet up to a position directly below the lower surface of the work support that has risen together with the pallet. In a state where the work support receiving seat is slid, the elevating drive device is lowered and the work support is placed on the work support receiving seat, thereby leveling out the work. Horizontal leveling device for workpieces on the transport cart   The horizontal leveling device for a workpiece on a transport carriage according to claim 1, wherein the workpiece support is separated into front, rear, left and right for each of the front, rear, left and right workpiece support receiving seats. The work on the transport carriage according to claim 1 or 2, wherein the transport platform of the transport cart is a work floor on which an operator rides, and the upper surface of the transport platform and the upper surface of the pallet are substantially flush with each other. Horizontal leveling device.

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