JPS6219982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feeding device for intermittently feeding a workpiece to a processing device, and its purpose is to provide a workpiece feeding device that can simplify the drive mechanism and reduce costs. It is to provide.

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a frame of a feeding device, which is formed in a horizontally long shape, and a workpiece is intermittently positioned on the upper surface of the frame. Stalled station 2
2 are installed at a distance from each other, and the work fixed on the pallet P is carried into the vicinity of the rear end of the frame F on the right side in the figure.
The pallet P is guided by a pallet guide 3 having guide grooves 3a formed opposite to each other in the upper ends of the left and right walls 2a, 2a, and is horizontally moved to the front end of the frame 1 on the left side in the figure, and is moved to the station 2 at the front end. It will be carried out. Note that A is the transport direction of the workpiece below.
The explanation will be made assuming that the arrow direction is the front.

4 is a main arbor horizontally suspended from the upper central part of the frame 1 through each station 2;
It is supported horizontally and rotatably by rollers 5 rotatably supported by each station 2, and its rear end 4a projects to the rear of the station 2 at the rear end so that a pallet P can be introduced. Feed claws 6 to 6 for feeding workpieces are provided in a spaced apart manner in a portion corresponding to the front and rear ends of each station 2, and when the main arbor 4 is rotated, each feed claw 6 is raised and lowered to feed the pallet. It can be engaged with and detached from the front and rear ends of P in a pinch-like manner.

Reference numeral 7 denotes a sub-arbor that is rotatably installed horizontally at the upper end of the frame 1 below the main arbor 4 and passing through each station 2. The arm 8 is fixed in an upward direction.

9 to 9 are left and right wall portions 2a for each station 2.
A pair of knock pins 9, 9 are vertically installed on the left and right sides through the hole so that they can move up and down.
The lower end of the connecting piece 10 is connected by a connecting piece 10 that has a substantially chevron-shaped side surface and is approximately S-shaped in plan view, and a link 11 that connects the upper end of this connecting piece 10 with the swinging arm 8 of the sub-arbor 7. When the sub-arbor 7 is rotated, each knock pin 9 is moved up and down via the swing arm 8, the link 11, and the connecting piece 10, and the upper end 9a of each knock pin 9 is moves forward and backward into the guide groove 3a of the pallet guide 3 and is engaged with and disengaged from the through hole P1 provided through the pallet P at a position corresponding to the knock pin 9, so that the pallet P can be positioned at each station 2.

Note that when the sub-arbor 7 is rotated counterclockwise to move the knock pin 9 downward, and the swing arm 8 and the link 11 swing to the left in FIG. 3, the swing arm 8 and the link 11 are dead. It is set so that it oscillates beyond the point.

12 is a cylinder installed horizontally in the upper part near the front end of the frame 1, and its piston shaft 1
The tip of the piston shaft 2a transmits the forward and backward movement of the piston shaft 12a to the main arbor 4, and, prior to this forward and backward movement, converts the same forward and backward movement into a rotational movement and transmits it to the main and sub-arbor 4, 7. A connecting mechanism R for this purpose is connected.

Next, the connection mechanism R will be explained according to FIGS. 4 to 6. (However, FIGS. 4 to 6 show the connection mechanism R moved to the front end position.) 13 is a connection. In the machine frame of the mechanism R, a main shaft 14 is mounted horizontally in the vicinity of the center, while a guide hole 13a penetrating the front part of the lower end in the longitudinal direction has a sub-arbor 7. are slidably fitted near the front end.

Reference numeral 16 denotes a connecting arm fitted to the main shaft 14, which extends downwardly so as to be swingable, and the tip of the piston shaft 12a of the cylinder 12 is pinned to its lower end 16a.

Reference numeral 17 denotes an interlocking arm that is fitted to the main shaft 14 so as to be able to move together with the connecting arm 16, and extends rearward and upward so as to be able to swing, and an engaging groove 17a is formed near the tip of the interlocking arm. It is recessed in the shape of a mold.

Reference numeral 18 articulates an upper arm 19 fitted to the main arbor 4 facing the connecting mechanism R, and a lower arm 20 slidably fitted to the sub-arbor 7 facing the connecting mechanism R. It is a cooking rod, and a roller 18a is connected to an interlocking arm 17 near its center.
When the interlocking arm 17 swings together with the connecting arm 16, the upper and lower arms 19, 20 swing through the connecting rod 18, and Arbors 4 and 7 are each rotated.

A key 15 is fixed to the fitting hole 20a of the lower arm 20 in order to transmit the swinging motion of the lower arm 20 to the sub-arbor 7 at each slide position of the lower arm 20, and is attached to the front end of the sub-arbor 7. It is fitted into a key groove 7a that is recessed in a horizontally elongated shape.

Next, the regulating mechanism K for regulating the forward and backward movement of the main arbor 4 at this forward and backward movement end will be explained in FIGS. 4 and 7.
To explain according to the figure, 21 is a cam fitted to the tip of the main shaft 14, and relief portions 21a, 21a are recessed in the upper part of the cam 21 in a front-back symmetrical manner, and both relief portions 21a are recessed. There is a locking part 21 between
b is projected upward.

Reference numerals 22 and 23 are a pair of front and rear movable claws disposed above the cam 21 in a left and right offset manner, each of which is pinned to the machine frame 13 so as to be able to tilt inward. The locking portions 22a, 23a are respectively projected upward, and the leg portions 22b, 23b extending downwardly are provided with springs 24 that bias the two leg portions 22b, 23b in a direction toward each other. is hung, and furthermore, the front and rear movable claws 22,
Both jaw parts 22c and 23c at the inner corner of the lower part of 23 are the relief part 21a or the locking part 21b of the cam 21, respectively.
It is possible to engage in or interact with.

Reference numerals 25 and 26 refer to front and rear stoppers that are attached horizontally to the upper part of the support stand 27 which is installed in the vicinity of the front end of the frame 1, and extend forward and rearward with respect to the support stand 27, respectively. The front stopper 25 is disposed near the path of the coupling mechanism R, and is movable after the tilting movement is restricted by the cam 21 when the coupling mechanism R moves to the forward end together with the piston shaft 12a. The forward movement of the connecting mechanism R is temporarily restricted by contacting the locking portion 23a of the pawl 23 prior to the start of retraction, while the rear stopper 26 causes the connecting mechanism R to move to the retracting end together with the piston shaft 12a. When the tilting movement is regulated by the cam 21, the locking portion 22a of the front movable pawl 22 is brought into contact with the connecting mechanism R.
The forward motion of the vehicle is temporarily regulated prior to the start of forward motion. Then, when the piston 12a starts moving forward with the coupling mechanism R moved to the retracted end, the cam 21 rotates together with the main shaft 14, and the rear movable claw 23
The tilting restriction and the movement restriction of the connecting mechanism R are respectively released and the connecting mechanism R starts moving,
When the piston shaft 12a starts retracting with the coupling mechanism R moved to the forward end, the cam 21 rotates back together with the main shaft 14 to restrict the tilting of the front movable pawl 22 and the retraction of the coupling mechanism R, respectively. Once released, the coupling mechanism R begins to retreat.

Next, the operation and effects of the embodiment having the above configuration will be explained.

First, when the piston shaft 12a of the cylinder 12 retreats and the coupling mechanism R and the main arbor 4 move to the rear end position, that is, the original position for feeding the workpiece, the rear stopper 26 engages the front movable claw 22. The locking portion 21b of the cam 21 contacts the stop portion 22a to restrict the forward movement of the coupling mechanism R, and the locking portion 21b of the cam 21 contacts the jaw portion 22c of the front movable pawl 22 to restrict tilting of the front movable pawl 22 (11th (See Figure A). In addition, the connection mechanism R
In this case, the connecting arm 16 is tilted backward and the interlocking arm 17 is tilted downward (see Figure 8 A), and the upper and lower arms 19 and 20 are each tilted downward (see Figure 9 A). The arbor 4, 7 is arranged so that each feed pawl 6 is tilted and disengaged from the pallet P, and the knock pin 9 is moved upward and engaged in the through hole of the pallet P for positioning. Each is rotated (see Figure 10A).

When the piston shaft 12a is urged in the moving direction in the above state, the connecting arm 16 swings forward in a downwardly inclined manner, and the interlocking arm 17 swings upwardly (see FIG. 8B). ), upper and lower arms 19,
As a result, as shown in FIG. 9B, the main and sub-arbores 4 and 7 are each rotated counterclockwise as shown in FIG. 10B. The feed claw 6 stands up and clamps the front and rear parts of the pallet P so that it can be fed, and the knock pin 9 moves down and is removed from the through hole P1 of the pallet P, completing the preparation operation for feeding the workpiece. . At the same time, the main shaft 14 is rotated by the swinging of the connecting arm 16.
rotates, cam 21 rotates clockwise, and cam 2
The relief part 21a of 1 is the jaw part 22c of the front movable claw 22.
As a result, when the locking portion 22a of the front movable claw 22 is pressed by the rear stopper 26, the front movable claw 22 is moved to a position opposite to the front movable claw 22 and the tilting restriction on the front movable claw 22 is released (see FIG. 11B). The jaw portion 22c of the movable claw 22 engages in the relief portion 21a of the cam 21, and the front movable claw 22 becomes tiltable (see FIG. 11C), allowing the coupling mechanism R to advance. Thereafter, the connecting mechanism R and the main arbor 4 start moving forward, and the workpieces on the pallet P are fed.

Furthermore, when the coupling mechanism R moves forward, the rear movable claw 23
moves while pushing up the front stopper 25 (11th
When the coupling mechanism R moves forward and reaches the front end position, the front stopper 25 engages with the rear movable pawl 23 to restrict the backward movement of the coupling mechanism R (see Figure 11E). .

Then, when the piston shaft 12a is urged in the retracting direction, each component moves in the opposite direction to the feeding preparation operation, and the main and sub-arbor 4, 7 performs the return preparation operation of the main arbor 4.The feed pawl 6 tilt and knock pin 9
After turning for upward movement, the pallet P remains in the forward position with the lock pin 9 locked, and the coupling mechanism R and the main arbor 4 begin to retreat and return to the original position, and the following steps are performed. The above series of operations is repeated.

Therefore, the advancement of the lever prior to the advancement of the main arbor 4 for feeding the workpiece is temporarily restricted to perform the feeding preparation operation and the positioning release operation, while at the same time preventing the main arbor 4 from returning to its original position. A series of main operations and preparatory operations for performing a return preparation operation and a positioning operation are reliably and smoothly carried out by driving one cylinder 12 by temporarily regulating the withdrawal of the lever prior to the retraction of the lever. This makes it possible to significantly simplify the feeding mechanism by reducing the need for various drive devices and control mechanisms, such as hydraulic pressure devices and electric control mechanisms, for distributing each operation individually, thereby reducing costs.

That is, in the present invention, the pallet on which the workpiece is placed is horizontally suspended so as to be movable in the axial direction and rotatable in order to feed the pallet on which the workpiece is placed, and a feed pawl is attached to the pallet for releasably holding the pallet. The main arbor and the auxiliary arbor, which is horizontally suspended so as to be rotatable and connected to a positioning member for releasably locking the pallet, are arranged side by side, and are connected to the piston shaft of the cylinder and connected to both front arbors. On the other hand, when the piston shaft starts to move back and forth, a connecting mechanism that is movable together with the main arbor but not moveable together with the sub-arbor converts this forward and backward movement into a rotational movement and moves the two arbors together. A connecting member connected to the piston shaft for transmission is provided, and a cam rotatably supported with respect to the connecting mechanism is provided, and a regulating member is tiltably supported by the connecting mechanism opposite to the cam. The cam is operatively linked to the connecting member in order to regulate and permit the tilting movement of the cam by the rotational movement of the cam, thereby permitting and regulating the operation of the connecting member and the synchronous rotational movement of both the arbors. Further, in the vicinity of the passage of the connecting mechanism, when the piston shaft starts forward and backward movement from the moving end, it comes into contact with the regulating member whose tilting is regulated by the cam, and the moving movement of the connecting mechanism is stopped. In order to allow movement of the coupling mechanism by temporarily regulating the regulating member prior to starting and retracting, and then tilting the regulating member whose tilting regulation is released by the rotational operation of the cam. By installing a pair of stoppers facing each other on the regulating member, the main operation and preparatory operation for transporting and positioning the workpiece can be reliably performed in sequence using one drive source, and the drive mechanism can be activated. This invention is extremely excellent as a workpiece feeding device because it can be simplified and costs can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view showing the entire device, FIG. 2 is a side view, FIG. 3 is an enlarged sectional view taken along the line W-W in FIG.
The figure is a plan view of the coupling mechanism moved to the front end position.
The figures are a view taken along the line X-X in Figure 4, a view taken along the Y-Y line in Figure 5, a view shown in Figure 7, and a view viewed along the Z-Z line in Figure 8. , B is an explanatory diagram showing the interlocking operation between the cylinder, the connecting arm, and the interlocking arm; FIGS. FIG. 11B is an explanatory diagram showing the interlocking operation of the feed pawl and the knock pin with the pallet, and FIGS. 4...Main arbor, 6...Feed claw, 7...Sub-arbor, 12...Cylinder, 12a...Piston shaft,
25, 26...Stopper, R...Connection mechanism, P...
...Palette.

Claims (1)

[Claims] 1. A main arbor that is movable in the axial direction and horizontally suspended so as to be rotatable in order to feed a pallet on which a work is placed, and is equipped with a feed pawl for releasably holding the pallet; A secondary arbor horizontally suspended for rotational movement and connected to a positioning member for releasably locking the pallet is arranged in parallel, and the main arbor is connected to the piston shaft of the cylinder and is connected to both the arbor. A coupling mechanism that is movable together and that is not movable together with the auxiliary arbor is provided with a coupling mechanism that is connected to the auxiliary arbor in such a way that when the piston shaft starts moving back and forth, the movement is converted into a rotational movement and transmitted to both the arbors. A connecting member connected to the piston shaft is provided, and a cam rotatably supported by the connecting mechanism is provided, and a regulating member tiltably supported by the connecting mechanism opposite to the cam is tilted. The cam is operatively connected to the connecting member in order to permit and permit the operation of the connecting member and the synchronous rotational movement of both arbors by regulating and permitting the rotational movement of the cam; In the vicinity of the passage of the mechanism, when the piston shaft starts moving forward and backward from the moving end, it comes into contact with the regulating member whose tilting is regulated by the cam, and the movement of the coupling mechanism starts moving forward and backward. The control member is temporarily restricted prior to the movement of the coupling mechanism, and then the restriction member, whose tilting restriction has been released by the rotational movement of the cam, is tilted to allow movement of the coupling mechanism. A workpiece feeding device characterized in that a pair of stoppers are installed.