JPH043275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a method for moving a driven object such as a jig to a
This invention relates to an orthogonal coordinate type drive device that moves in the axial direction and the Y-axis direction.

(Prior Art) Conventionally, according to Japanese Utility Model Application Publication No. 49-147682, a movable frame that is movable with respect to the machine frame and a driven object that is movable with respect to the movable frame are selectively moved by a common drive source. Devices that do this are known. In this device, a first screw rod and a spline shaft, which are synchronously driven by a drive source, are arranged in parallel on a machine frame, and a first screw nut, which is pivotally supported on a movable frame, is screwed into the first screw rod, and the nut is rotated. is connected to the gear on the spline shaft via a clutch mechanism, and the movable frame is further provided with a second screw rod that rotates in synchronization with the first screw nut, and a brake mechanism that stops the rotation of the screw nut, and the second screw rod is covered with the second screw rod. This is made up of a fixed second screw nut screwed onto the movable frame, and when moving the movable frame, the clutch mechanism is turned off and the brake mechanism is turned on to stop the rotation of the second screw nut. The rotation of the first screw nut is restrained so that the movable frame is moved as the first screw nut rotates, and when moving the driven object, the brake mechanism is turned off and the clutch mechanism is turned on. The screw nut is rotated by the spline shaft at the same speed as the first screw rod 11 to prevent the movable frame from moving.
The driven object is moved by the rotation of the second screw rod that follows the screw nut.

In the above publication, the moving direction of the movable frame and the moving direction of the driven object are parallel, but the moving direction of the driven object relative to the movable frame is perpendicular to the X-axis direction, which is the moving direction of the movable frame. Even when moving in the Y-axis direction, the movable frame can be moved in the X-axis direction and the driven object in the Y-axis direction using a common drive source using the same feeding mechanism as described above.

(Problems to be Solved by the Invention) The above device has the advantage of not requiring separate drive sources in the X-axis direction and the Y-axis direction, but the clutch mechanism, brake mechanism, and 1
A spline shaft for rotating the screw nut, a gear on the shaft, and a gear for connecting the spline shaft to a drive source are required, which increases the number of parts and complicates the structure.

In view of the above points, the present invention eliminates the need for separate drive sources in the X-axis direction and the Y-axis direction, and also simplifies the switching mechanism for the moving direction as much as possible.
The purpose is to provide a small and inexpensive device with a simple structure.

(Means for Solving the Problems) In order to achieve the above object, the present invention is an orthogonal coordinate type drive device that moves a driven object in mutually orthogonal X-axis directions and Y-axis directions, In a device in which a driven object is supported movably in the Y-axis direction by a movable frame that is movable in the X-axis direction with respect to the machine frame, the machine frame has a longitudinal axis in the X-axis direction that is forward and reversed by a drive source attached to the machine frame. At the same time, the first screw rod is installed on the movable frame.
a first screw nut having a second screw rod which is elongated in the axial direction and rotatably supported on the movable frame on the outer periphery of the first screw rod and fixedly in the X-axis direction; and an outer periphery of the second screw rod. and a second screw nut fixed to the driven object, a drive gear that engages with a driven gear fixed to the second screw rod is fixed to the first screw nut, and further the movable frame A first stopper member for stopping the driven object at a predetermined position in the X-axis direction and a second stopper member for stopping the driven object at a predetermined position in the Y-axis direction are provided.

(Example) Referring to FIG. 1, 1 is a jig cart, 2 is a movable jig on the cart 1, 3 is the trajectory of the cart 1, and the workpiece W is held on the jig 2. In this state, the work W is transferred to a predetermined work station, for example, a sealing station S by moving the cart 1, and delivered to the sealing jig 4 placed on the back side of the station S, and placed on the front side of the station S. The sealing agent is applied to the workpiece W by the coating robot 5.

Here, the work W is transferred to the sealing jig 4 by first moving the movable jig 2 forward diagonally in the Y-axis direction, and then moving it diagonally upward in the X-axis direction perpendicular to the Y-axis direction. In this state, the movable jig 2 is moved backward in the Y-axis direction and lowered in the X-axis direction. A drive device 6 is mounted to provide movement in the X-axis direction and the Y-axis direction.

As shown in FIGS. 2 to 4, the drive device 6 includes a machine frame 7 vertically disposed on the front side of the truck 1, and a pair of guides extending in the X-axis direction on both left and right sides of the machine frame 7. Sliders 8a, 8 on both the left and right sides are mounted on the rails 7a, 7a.
A movable frame 8 is slidably supported at the movable frame 8, and a pair of left and right guide rails 8b, 8b, which are longitudinal in the Y-axis direction, are fixed to the movable frame 8. The driven object 9 consisting of the base frame of the movable jig 2 is slidably supported by the sliders 9a, 9a on the lower surface thereof, and the driven object 9 is moved in the X-axis direction due to the movement of the movable frame 8 and in the X-axis direction. The movable frame 8 can be moved in the Y-axis direction.

A first screw rod 10 that is longitudinal in the X-axis direction and a second screw rod 11 that is long in the Y-axis direction are installed on the machine frame 7 and the movable frame 8, respectively, and are located at the center in the left-right direction. A drive source 12 consisting of a hydraulic motor is attached to the lower end of the machine frame 7, and the first screw rod 10 can be rotated forward and backward by the drive source 12.
0 on the outer periphery of the first screw nut 13, and the second screw nut 13 on the outer periphery of the
A second screw nut 14 is screwed onto the outer periphery of the screw rod 11, and the first screw nut 13 is then screwed onto the outer circumference of the screw rod 11.
is a boss portion 8c protruding from the lower back surface of the movable frame 8.
The first screw is inserted into the movable frame 8 in a rotatable manner from above, and is prevented from being removed from the boss portion 8c by a nut 13a at the lower end thereof, and is locked to the movable frame 8 in the X-axis direction. A drive gear 15 made of a bevel gear is fixed to the upper end of the nut 13 and engaged with a driven gear 16 made of a bevel gear fixed to the rear end of the second screw rod 11, and the second screw nut 14 is connected to the driven object 9. It was inserted and fixed in a holder 9b protruding from its lower surface. Furthermore, a pair of upper and lower first stopper members 17, 17 are provided on the machine frame 7 to stop the movable frame 8 at predetermined positions in the X-axis direction, for example, at an ascending end position and a descending end position. A pair of front and rear second stopper members 18, 18 are provided to stop the driven object 9 at a predetermined position in the Y-axis direction, for example, a forward end position and a backward end position. In addition to the lower boss part 8c described above, an upper boss part 8d into which the first screw rod 10 is loosely fitted is provided on the back surface of the frame 8, and the upper boss part 8d is provided on the machine frame 7 at the upper end position of the movable frame 8. The first stopper member 17 at the upper end that engages with the upper boss portion 8d and the first stopper member 17 at the lower end that engages with the lower boss portion 8c at the lower end position of the movable frame 8 are connected to the cylinder 17a. A pair of front and rear second stopper members 18, 18 are provided on the movable frame 8 so as to be able to protrude and retract from the front. are provided upwardly and retractably by a common cylinder 18a.
In the drawing, 18b indicates the second stopper members 18, 18.
a connecting piece that interlocks with the cylinder 18a that is erected;
8e shows a cover for the first screw rod 10 attached to the movable frame 8.

(Function) When moving the driven object 9 in the Y-axis direction, the movable frame 8 is stopped at a predetermined position in the X-axis direction by the first stopper member 17, and the first screw rod 10 is rotated by the drive source 12. In this case, the movable frame 8
The first screw nut 13, which is locked in the X-axis direction, rotates together with the first screw rod 10 at a fixed position, and the second screw rod 11 is rotated via the drive gear 15 and the driven gear 16. , second screw nut 1
4, the driven object 9 is moved in the Y-axis direction.

Further, when the driven object 9 is stopped at a predetermined position in the Y-axis direction by the second stopper member 18 and the movable frame 8 is released from being restrained by the first stopper member 17,
In this case, the rotation of the second screw rod 11 is restricted, and the rotation of the first screw nut 13 connected thereto via the driven gear 16 and the driving gear 15 is also restricted. The first screw rod 1
0 moves in the X-axis direction, the movable frame 8 moves in the X-axis direction, and the driven object 9 is given movement in the X-axis direction.

Here, to explain the operation when transferring the workpiece W to the sealing jig 4 of the embodiment, first, with the movable frame 8 restrained at the lower end position, the first screw rod 1 is
0 in the normal direction, the movable jig 2 is advanced in the Y-axis direction via the second screw nut 14,
Next, the jig 2 is stopped at the forward end position, the movable frame 8 is released, and the first screw rod 10 is rotated in the normal direction again, and the movable frame 8 is moved along the X axis via the first screw nut 13. The workpiece W is transferred at the ascending end position, and then the movable frame 8 is stopped at the ascending end position, the jig 2 is released, the first screw rod 10 is reversed, and the first screw rod 10 is reversed. The jig 2 is moved backward in the Y-axis direction via the second screw nut 14, and then the jig 2 is stopped at the backward end position, the movable frame 8 is released, and the first screw rod 10 is moved again. Reverse the first screw nut 1
3, the movable frame 8 is lowered in the X-axis direction, and the jig 2 is returned to its original position.

(Effects of the Invention) As described above, according to the present invention, the driven object can be moved in the X-axis direction and the Y-axis direction, which are orthogonal to each other, by a common drive source, and the driven object can be moved in the X-axis direction and the Y-axis direction, respectively. No driving source is required, and only a first stopper member and a second stopper member are required in place of the clutch mechanism and brake mechanism of the conventional device, and the spline shaft and related parts around the spline shaft of the conventional device are unnecessary. Therefore, the structure can be further simplified, the device can be made small and inexpensive, and it can be mounted on a jig cart or the like without impairing its maneuverability, which is advantageous.

[Brief explanation of drawings]

Fig. 1 is a side view of a jig cart on which the device of the present invention is mounted, Fig. 2 is a front view of the device of the present invention as seen from the Y-axis direction, Fig. 3 is a plan view taken along the - line in Fig. 2, and Fig. 4
The figure is a side view taken along the line -- in FIG. 2. 6... Drive device, 7... Machine frame, 8... Movable frame,
9... Driven object, 10... First screw rod, 11... Second screw rod, 12... Drive source, 13... First screw nut, 14... Second screw nut, 15
... Drive gear, 16 ... Driven gear, 17 ... First
Stopper member, 18...Second stopper member.

Claims (1)

[Claims] 1. An orthogonal coordinate type drive device that moves the driven object 9 in mutually orthogonal X-axis directions and Y-axis directions,
In a device in which a movable frame 8 movable in the X-axis direction with respect to the machine frame 7 supports a driven object 9 so as to be movable in the Y-axis direction, a drive source 12 attached to the machine frame 7 is provided.
The first screw rod 1, which is longer in the X-axis direction, is rotated forward and backward by
At the same time, a second screw rod 11 which is longitudinal in the Y-axis direction is installed on the movable frame 8, and a screw rod 11 is attached to the movable frame 8 on the outer periphery of the first screw rod 10 so as to be rotatable and immovable in the X-axis direction. The first screw nut 13 is pivotally supported, and the second
A second screw nut 14 fixed to the driven object 9 is screwed onto the outer periphery of the screw rod 11, and the first screw nut 13 engages a driven gear 16 fixed to the second screw rod 11. A first part fixes the gear 15 and further stops the movable frame 8 at a predetermined position in the X-axis direction.
A rectangular coordinate drive device characterized by being provided with a stopper member 17 and a second stopper member 18 that stops the driven object 9 at a predetermined position in the Y-axis direction.