JP2644125B2 - Positioning device for transport trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for simultaneously positioning, for example, a carrier on which a die workpiece is mounted in front of a machine tool in both horizontal and vertical directions.

[0002]

2. Description of the Related Art Conventionally, as a device for feeding a transferred work to a table of a machine tool, for example, when processing a work of a mold on a transfer carriage with a machine tool,
For example, an apparatus as disclosed in JP-A-63-171797 is known. In this apparatus, a lift mechanism is provided in a self-propelled vehicle, and when a work is transported to the front of a machine tool, the work is lifted to a predetermined height by a lift mechanism and transferred onto a table. On the other hand, in the case of Japanese Patent Publication No. 3-13031, after transporting the workpiece on the transport trolley to the processing position,
A processing system for directly processing at the processing position is disclosed. That is, the carriage is guided directly to the processing position of the machine tool, and is positioned and clamped, so that the transfer onto the table is unnecessary.

[0003]

However, in the conventional case,
There has been a problem that the positioning device of this type of transport vehicle tends to be complicated. That is, for example, in the case of a self-propelled vehicle device with a lift mechanism like the former, in addition to the lift mechanism for positioning in the height direction, it is necessary to separately provide a device for positioning in the horizontal direction. In addition, since the driving device requires a separate device, the size of the device is increased, the positioning procedure requires time, and the configuration of the device is expensive. Further, in an apparatus such as the latter processing system for directly processing a work on a transport trolley, the size of the work that can be processed is limited, and there is a problem in terms of accurate positioning of the work.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a transport carriage having a cylindrical member at a lower end.
The lift members are lifted and lowered by a certain amount.
Drive mechanism and a floor mechanism corresponding to each lift member.
A plurality of positioning members, the positioning members
A pin portion that can be fitted to the cylindrical member, and a lower surface of the cylindrical member
A support portion that can be supported and a cylindrical portion attached to the pin portion;
The horizontal position of the carriage is adjusted by fitting the materials,
Supports the lower surface of the cylindrical member with the support for positioning in the height direction
In the positioning device for a transport trolley to be performed,
The upper part of the bearing of the positioning member has a lift adjustment space.
A detachable sensor is provided for any of the plurality of positioning members.
The height of one of the pins is adjusted to the height of the pins of the other positioning members.
Higher than the height and a guide taper at the upper end
It is characterized by having.

[0005]

[Function] After the carriage is roughly positioned at a predetermined position,
When the lift member of the carriage is extended by a predetermined stroke by the drive mechanism, the cylindrical member at the lower end of the lift member engages with the positioning member on the floor surface, and the positioning in the horizontal and height directions is performed simultaneously. That is, the positioning in the horizontal direction is performed by fitting a plurality of cylindrical members to the respective pin portions, and the lower surface of the cylindrical member abuts on the support portion and extends by a predetermined stroke, so that the transport vehicle is lifted by a predetermined amount, and the height is increased. Direction positioning is performed. At this time, by increasing the height of any one of the pins and providing a guide taper at the upper end thereof, even if the carrier is at a rough position with respect to the positioning member, Rough positioning is performed by the single pin portion, and thereafter, the cylindrical member can be smoothly and smoothly engaged with the entire remaining pin portion, and the entire positioning becomes smooth. And, since there is provided a spacer for lift adjustment on top of the bearing, the amount floating of the conveyance carriage can be freely adjusted.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a positioning device for a carriage according to the invention. FIG. 1 is an overall schematic view of a positioning member and a transporting trolley formed in front of the processing machine, FIG. 2 is a front view of the transporting trolley, (A) before lift-up, (B) after lift-up, and FIG. It is a top view.

As shown in FIG. 1, the positioning apparatus according to the present invention sends a workpiece W mounted on a carrier 1 onto a table 3 of a machine tool 2 and processes a die with a processing tool 4. In such a case, the work W placed on the transport trolley 1 can be transferred to a table 3 having a different height along with the lower pallet P.

That is, the upper surface of the transport trolley 1 is configured to be slightly lower than the upper surface of the table 3 of the machine tool 2 for transferring and receiving the work W in other processes, and the pallet P is moved from the transport trolley 1 to the table 3. In order to move the transfer rollers, it is necessary to match the height positions of a number of transfer rollers provided on the upper surface of the transfer carriage 1 and a number of transfer rollers provided on the surface of the table 3. The carriage 1 is lifted up by a predetermined amount to be positioned.

First, the configuration of the transport vehicle 1 will be described. The carriage 1 is capable of running on a rail 5 extending in a direction perpendicular to the plane of FIG. 1 and includes a traveling drive motor 6 as shown in FIG. The wheels 7 on the driving force transmitting side that mesh with the traveling drive motor 6 have engagement portions with the rails 5 on both sides (see FIG. 2), whereas the wheels 8 on the other side are connected to the rails 5. Is a form having no engaging portion.

At four corners of the carriage 1, lift mechanisms 10,... Are provided. The lift mechanism 10 is used to lift the main body of the carriage 1, and as will be described later, a bearing portion 11 of a type that bears a ball screw provided on the main body of the carriage 1, and a ball screw shaft that is screwed to the bearing portion 11. The bearing portion 11
The driving force of the lifting drive motor 13 is transmitted to the lifting member 12 so that the lift member 12 can move up and down with respect to the bogie 1 body.

That is, as shown in FIG. 3, an output shaft of a lifting drive motor 13 and a rotating shaft 1 extending left and right below the vehicle body.
4, a timing belt 15 is wound around the rotating shaft 1.
The belts 16, 16 are disposed in the front-rear direction at both ends of the belt 4, and the belts 16 are connected to the worm gears 17, ‥ of the bearings 11, ‥. By transmitting the rotation to the worm gear 17, the lift member 12 is moved up and down at a rate of, for example, about 6 mm per rotation of the worm gear 17. In other words, in this example,
Motor 13, rotating shaft 14, timing belt 15, bell
The lift member 12 is fixed by the gear 16 and the worm gear 17.
A drive mechanism 13A for raising and lowering the amount was constituted.

A transfer roller 18 orthogonal to the rail 5 is provided on the upper surface of the carriage 1, and the pallet P is placed on the transfer roller 18. As shown in FIG. 2, pallet holding members 30, 30 are provided on both left and right end portions so as to be able to move up and down. Reference numeral 19 in FIG. 3 denotes a pallet transfer motor, which drives a chain with hooks that can be engaged with the center of the lower surface of the pallet P.

Next, the lift mechanism 10 is shown in FIGS.
It will be described based on. 4 is an internal structural view of the lift mechanism as viewed from the AA direction in FIG. 3, FIG. 5 is a front view thereof, and FIG.
FIG. 3 is a side view as seen from the BB direction.

As shown in FIG. 4, the lift mechanism 10 includes a cylindrical member 20 which is connected to a lower end of the lift member 12. The cylindrical member 20 is held by a bogie-side guide holding cylinder 21 provided therearound,
The opening is directed downward, and among the four cylindrical members 20 at the four corners, only one at the lower left of FIG. , 2
0a.

That is, the tapered surfaces 20a, 20a are formed along a straight line parallel to the rail 5 direction, and only two opposing sides are linearly tapered, and are tapered in a direction orthogonal to the tapered surface 20a. A notch 20b is provided on two opposing sides in the direction perpendicular to the plane of the paper where no 20a is formed, and a step is provided between the lowermost surface of the notch 20b and the lowermost surface of the tapered surface 20a. The tapered surface 20a is connected to a lower positioning member 22 as described later.
The purpose of this is to ensure smooth engagement of the carriage 1 even if the position of the truck 1 is initially at a rough position.

A side surface of the cylindrical member 20 is provided with a single vertical detent groove 20c, which is engaged with a projection protruding from the inner surface of the guide holding cylinder 21. This is for restricting the rotation of the inner cylinder member 20 that moves up and down, and moving the inner cylinder member 20 up and down while keeping the direction of the tapered surface 20a constant.
It is provided only in one inner cylinder member 20.

The remaining three cylindrical members 20 are simply ordinary cylinders and do not have the tapered surface 20a, the notch 20b, and the detent groove 20c.
a, the configuration other than the cutout portion 20b and the detent groove 20c, that is, the guide holding cylinder 21 and the like have exactly the same configuration.

The positioning member 22 is provided on the floor in front of the machine tool 2 in correspondence with each of the lift mechanisms 10,. One positioning member 22 corresponding to the cylindrical member 20 having the tapered surface 20a has a different form from the other three positioning members 22 and 述 べ る as described below.

The positioning member 22 shown in FIG. 4 corresponds to a special single cylindrical member 20 having a tapered surface 20a and the like, and has a mounting seat fixed at a fixed position in a concave portion on the floor surface. 23, a flange portion 22a as a support portion is provided at a bottom portion, and a pin portion 22b protruding upward is provided at the center. And this pin part 22b
Protrudes longer than the other three pin portions 22b,
A guide taper surface t is formed above the pin portion 22b. The diameter of the pin portion 22b is a diameter that can fit into the cylindrical member 20.

The guide tapered surface t is provided in a direction corresponding to the tapered surface 20a of the cylindrical member 20.
As is clear from FIG. 5, only the two sides at the opposite ends along the rail direction are linearly cut off.

A cover member 27 for covering the concave portion of the floor surface is fixed around the positioning member 22 with a screw 28 or the like. At the center of the cover member 27, the outer diameter of the cylindrical member 20 is set. A slightly larger hole is formed. An annular lift adjustment is provided around the pin portion 22b .
Spacers 24 are installed circumferentially around, there is a mounted state on the flange portion 22a.

A dust cap 25 urged upward by a spring 26 is provided above the lift adjusting spacer 24 , and the dust cap 25 is engaged with an inner peripheral portion of a cover member 27. While being locked,
It is slidable along the outer periphery of the pin portion 22b. The upper surface of the cover member 27 is higher than the upper surface of the cover member 27 so that foreign matters such as chips are less likely to accumulate. The dust cap 25 is for preventing chips and the like from accumulating in the concave portion on the floor surface, and is for eliminating errors in the height position due to the accumulation of chips and the like.

A clearance is provided between the lift adjusting spacer 24 and the dust cap 25, and the dust cap 25 is vertically movable between the clearances. As will be described later, the lower surface of the cylindrical member 20 comes into contact with the dust cap 25 and presses downward, and after hitting the lift adjusting spacer 24 , supports the weight of the bogie 1. The dust cap 25 is made of, for example, steel and has strength.

The other three positioning members 22
6, as shown in FIG. 6, the amount of protrusion of the pin portion 22b upward is small and the guide taper surface t is not formed. However, other components, such as a lift adjusting spacer 24 , a dust cap 25, a cover member 27, etc. Is exactly the same.

The operation of the positioning device configured as described above will be described. When the transport vehicle 1 that has been self-propelled by the traveling drive motor 6 stops in front of the machine tool 2, the lifting drive motor 13 operates and each of the four lift members 12 extends downward.

First, the cylindrical member 20 of the lower left lift mechanism 10 shown in FIG. 3 is engaged with the pin portion 22b of the lower positioning member 22 to perform rough positioning. At this time, since the tapered surface 20a of the cylindrical member 20 and the guide tapered surface t of the pin portion 22b are engaged with each other to perform positioning in the left-right direction, the engagement is smooth even if the position is slightly shifted.

The one lift mechanism 10 is provided on the wheel 8 side having no engaging portion with the rail 5, that is, in FIG.
, The initial positioning is more effectively performed than when provided on the right side where displacement is unlikely to occur.

Subsequently, when the lift member 12 further extends, the other three cylindrical members 20 are fitted into the corresponding pin portions 22a of the respective positioning members 22, and press the dust cap 25 downward. When the dust cap 25 cannot be further lowered by the position adjustment spacer 24, the bogie 1 body is separated from the rail 5 and rises up, and a state as shown in FIG. 2B is obtained. Then, when the lift member 12 extends a predetermined stroke and the upper surface of the carriage 1 matches the height of the surface of the table 3 of the machine tool 2, the lifting drive motor 13 stops.

By the above series of operations, the positioning of the carriage 1 in the horizontal direction and the positioning in the height direction are performed simultaneously. The height can be easily changed by changing the lift adjusting spacer 24 mounted on the pin portion 22b, and the lift adjusting space can be easily changed.
By using the support 24, the carriage 1 side lifting member 1
The extension stroke of No. 2 is always constant.

[0030]

As described above, the bogie positioning apparatus of the present invention can simultaneously perform horizontal positioning and vertical positioning by the positioning member provided on the floor surface and the lift mechanism provided on the bogie. As a result, the apparatus can be simplified and configured at low cost. Further, the time required for positioning is reduced. At this time, by performing rough positioning by using one positioning member and the lift mechanism at first, smooth engagement between the entire positioning member and the lift mechanism thereafter becomes smooth. Moreover,
It was so adjusted height by positioning spacer
Thus, the lift amount of the lift mechanism can be kept constant at all times, and the configuration of the bogie is simplified.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a positioning member and a transport trolley formed in front of a processing machine.

FIG. 2 (A) is a front view of the transport vehicle, before lifting up;
(B) after lift up

FIG. 3 is a plan view of a transport cart.

FIG. 4 is an internal structural view of the lift mechanism as viewed from the AA direction in FIG. 3;

FIG. 5 is a front view of the same.

FIG. 6 is a side view as seen from the BB direction in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transport trolley, 12 ... Lift member, 13A ... Lift member
Raising and lowering the drive unit, 20 ... cylindrical member, 22 ... positioning member, 22a ... bearing (flange portion), 22b ... pin, 24 ... spacer for lift adjustment, t ... guide taper.

Claims (1)

(57) [Claims] 1. A plurality of lift members provided on a transport trolley and having a cylindrical member at a lower end, a drive mechanism for raising and lowering the lift members by a predetermined amount, and a plurality of lift members provided on the floor corresponding to the respective lift members. The positioning member includes a pin portion that can be fitted to the cylindrical member, and a support portion that can support the lower surface of the cylindrical member. In the positioning device for a transport trolley, which performs positioning in the horizontal direction, and performs positioning in the height direction by supporting the lower surface of the cylindrical member with the support portion, an upper portion of the support portion of the positioning member has a lift adjusting portion.
A spacer is detachably provided, and the height of any one of the plurality of positioning members is
Higher than the height of the pins of the other positioning members, and
A guide taper is provided at an upper end of the carriage.