JPS6348568Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an article feeding device, and more particularly to a device for pitch-feeding a pressed workpiece or the like by a predetermined stroke.

(Prior art) Conventionally, in automobile manufacturing plants, etc., a feeding device that sends out workpieces, etc. that have been press-formed, transported by a belt conveyor, and put into a chute from the chute in a pitch-feed manner has an operation that switches the transport arm between a transporting position and a retreating position. The workpiece is fed in pitch by a linked operation with the pitch-feeding operation of the transfer arm in the transfer posture.

By the way, in the above-mentioned article feeding device, the operation of changing the posture of the conveyance arm and the operation of pitch feeding are each performed by separate cylinders, so the structure is complicated by the number of cylinders and the number of piping to the cylinders. This method has drawbacks such as being complicated and requiring a control device to properly coordinate the posture switching operation of the transfer arm and the pitch feeding operation.

(Purpose of the invention) The present invention was made in view of the above-mentioned drawbacks, and the purpose of the invention is to provide an article feeding device that can change the posture of a conveyance arm and perform pitch feeding with a single cylinder. shall be.

(Structure of the invention) The article feeding device of the invention includes a guide rod whose both ends are supported by a frame, a guide rod facing the conveying direction, a slider supported by the guide rod so as to be slidable back and forth, and a slider pivotally supported by the slider. a transport arm that is swingable around its upper end between a substantially vertical transport position and a retracted position that flips up backward from the transport position; a first link having one end connected to the upper part of the transport arm; and an upper end. a second link that is supported by the frame and whose lower end is connected to the other end of the first link; and a second link that is connected to the frame and the second link.
a driving cylinder for reciprocating the link; and a locking member for receiving from the front a stopper extending upward from the pivot portion of the transport arm when the transport arm is in the transport position and locking the link in the transport position; a locking member attached to the slider so as to be switchable between a locking position and an unlocking position and biased toward the locking position by an elastic member; a cam surface provided at the front end of the guide rod for switching the locking member to the unlocking position; It is equipped with the following.

In the above-mentioned article feeding device, when the driving cylinder is extended, the first
The transport arm is swing-driven forward via the link and the second link, and is switched from the retracted position to the substantially vertical transport position.

When the transport arm assumes the transport position, the locking member receives the stopper of the transport arm from the front and locks the transport arm in the transport position, and the transport arm is held in the transport position during transport in which the slider slides along the guide rod.

In this manner, when the slider comes close to the front end of the guide rod after completion of conveyance, the lock member is switched to the unlocked position by the cam surface provided at the front end of the guide rod.

Next, when the driving cylinder begins to contract, the transfer arm is switched from the transfer position to the retracted position because it is not locked by the locking member, and the slider is pulled back to the rear end of the guide rod and returned to its original position.

(Effect of the invention) Since the present invention is constructed as described above, when the driving cylinder of the feeding device is extended, the transport arm takes the transporting posture, and the transport is carried in a locked state via the locking member and the stopper. After the transport is completed, the transport arm is unlocked via the cam surface at the front end of the guide rod, and when the driving cylinder is contracted in this state, the transport arm is switched to the retracted position and returns to its original position before transport. .

In this way, since the posture change and the pitch feeding of the transfer arm can be performed using only one driving cylinder, the number of parts is reduced, the structure is simplified, and it can be implemented easily and at low cost.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in Figure 1, a workpiece 1 that has been pressed in an automobile manufacturing factory, etc.
The material is conveyed by the belt conveyor 2, fed into the chute 4 at the end of the belt conveyor 2, and then pitch-fed by the feeding device 3 to be sent to the next stage.

The feeding device 3 includes an L-shaped main frame 5 that is erected from the side of the belt conveyor 2 and extends above the belt conveyor 2, and an adjustment frame 6 that is inserted into the main frame 5 so as to be able to adjust its position.
A support frame 7 is attached to the front rod 6a of the adjustment frame 6 on the center of the belt conveyor 2 in the width direction, and a pair of left and right supports are mounted between the front and rear lower ends of the support frame 7. Guide rod 8
The conveyor section 9 is slidably attached to the guide rod 8, and the drive section 10 drives the conveyor section 9.

The transport section 9 is configured as follows.

That is, as shown in FIG. 2 and FIG.
A pair of sliders 13 are connected to two connecting rods 11 at the front and rear,
The sleeve 11a is rotatably attached to the front connecting rod 11 and has a transfer arm 1.
4 is vertically installed, and this transfer arm 14 is connected to the sleeve 1.
A stopper 15 having an L-shaped cross section is provided obliquely upward from the vicinity of the upper end of the transfer arm 14, and the upper end of the stopper 15 projects upwardly from the slider 13. .

A flat plate-shaped locking member 16 is pivotably supported on the upper surface of the right slider 13 so as to be horizontally rotatable about its approximate center as a fulcrum.
A spring 18 serving as an elastic member is stretched between the lock member 16 and the rear end portion 16 of the lock member 16.
At point a, the stopper 15 is biased toward the lock position where it is received from the front.

Further, when the conveying section 9 moves forward along the guide rod 8 and reaches its front end, the front section of the locking member 16 is pushed to the left to lock the locking member 1.
Cam surface 19 for switching 6 to the unlocked position
A cam plate 19 having a diameter a is arranged on the outside of the right guide rod 8 and is fixed to the support frame 7.

The drive unit 10 switches the transport arm 14 between a substantially vertical transport position A and a retracted position B that flips up backward from the transport position A, and also moves the transport unit 9 along the guide rod 8 in a reciprocating pitch. It is composed as follows.

As shown in FIG. 2, the rear end of the first link 21 is pin-coupled to a bracket 20 provided on the front side near the upper end of the transfer arm 14, and the first link 21 is connected to the support frame 7. The upper end of the second link 22 is pin-coupled to the upper part of the support frame 7, and the lower end is pin-coupled to the front end of the first link 21, and the transfer arm 14 is driven via the second link 22 and the first link 21. The front end of the piston rod 23a of the double-acting hydraulic cylinder 23 is pin-coupled to the middle of the second link 22, and the rear end of the cylinder body is pin-coupled to the rear of the support frame 7.

A buffer spring 24 is attached to the front end and rear end of the guide rod 8, and a hydraulic cylinder 23
Hydraulic pressure is supplied to and discharged from a hydraulic source not shown.

Next, the operation of the feeding device 3 will be explained.

When the cylinder 23 is contracted,
As shown in FIGS. 2 and 4, the transfer arm 14 is swung backward through the second link 22 and the first link 21 and switched to the retracted position B, but the hydraulic cylinder 23 is not extended. Figure 2 and Figure 5
As shown in the figure, the second link 22 and the first link 2
The transport arm 14 is swung forward via the
When the transport arm 14 is switched to the substantially vertical transport position A, the stopper 15 is received from the rear by the connecting rod 12, and the locking member 16 is switched from the unlocked position to the locked position by the spring force, and the locking member 16 moves the stopper 15. is also received from the front and becomes locked. That is, when the hydraulic cylinder 23 is extended as described above, the stopper 15 moves from the position shown in FIG. It swings while slipping on the side of 16. When the transfer arm 14 assumes the transfer posture A, the horizontal wall portion 15a of the stopper 15 having an L-shaped cross section
The tip of the locking member 16 is no longer in contact with the locking member 16, and the locking member 16 enters a locked state in which its rear portion contacts the L-shaped vertical wall portion 15b of the stopper 15 due to the force of the spring 18. That is, if the transport arm 14 attempts to swing to the retreat position B, the stopper 15
The transport arm 14, in which the horizontal wall portion 15a having an L-shaped cross section abuts against the rear end portion of the lock member 16, cannot swing.

When the hydraulic cylinder 23 is further extended in this state, the transfer arm 14 moves forward by sliding of the slider 13 while maintaining the transfer posture A, as shown in FIGS. 2, 3, and 6. But slider 1
3 reaches the front end of the guide rod 8, the lock member 16 engages with the guide surface 19a and is switched to the unlocked position against the force of the spring 18.

By the above-described operation, the transfer arm 1
Depending on the position of the workpiece 1, the workpiece 1 comes into contact with the rear end of the workpiece 1 while or after transitioning from the retracted posture B to the conveyance posture A, and when the workpiece 1 is sent pitch forward in the conveyance posture A. will be fed one stroke pitch.

Next, when the hydraulic cylinder 23 is contracted, the transfer arm 14 is swung backward via the second link 22 and the first link 21 and switched to the retracted position B since the lock member 16 is in the unlocked position. ,
While maintaining the retracted posture B, it is pushed backward and returns to its original position. In this case, when the lock member 16 comes off the guide surface 19a, it tries to swing due to the force of the spring 18, but it is stopped by the tip of the horizontal wall portion 15a of the L-shaped cross section of the stopper 15 and does not become locked.

Therefore, even if the next work 1 is loaded before the transfer arm 14 returns, it can move backward without interfering with the next work 1. Thereafter, by repeating the above operation, the workpieces 1 can be successively fed one by one.

According to the feeding device of the above embodiment, since the position of the support frame 7 can be adjusted in the front, back, left and right directions via the adjustment frame 6, it is possible to pitch workpieces 1 of various sizes and shapes.

Further, since the transport arm 14 is driven by only one driving cylinder 23 via a link mechanism, the structure of the feeding device 3 is simplified, and the control system for controlling the cylinder is also simplified.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a side view, Fig. 3 is an enlarged perspective view of the main part, and Fig. 4 shows that the conveying section is located at the rear end of the guide rod. Fig. 5 is a partial plan view showing a state in which the conveying section is moving in the middle of the guide rod, and Fig. 6 is a partial plan view showing a state in which the conveying section is located at the front end of the guide rod. FIG. 5... Main frame, 6... Adjustment frame, 7... Support frame, 8... Guide rod,
13...Slider, 14...Transport arm, 15...
...Stopper, 16...Lock member, 18...Spring, 19...Cam plate, 19a...Cam surface, 21...
...First link, 22...Second link, A...Transportation posture, B...Retreat posture.

Claims (1)

[Scope of utility model registration request] A guide rod whose both ends are supported by a frame and faces in the conveyance direction, a slider supported by the guide rod so as to be slidable back and forth, and a nearly vertical conveyance position centered on the upper end pivotally supported by the slider; a transport arm that is swingable to a retracted position flipped up backwards; a first link that has one end connected to the upper part of the transport arm; an upper end supported by a frame and a lower end that is connected to the first link; a second link connected to the end; a driving cylinder connected to the frame and the second link for reciprocating the second link; A locking member that receives an upwardly extending stopper from the front and locks it in a conveying position, which is attached to the slider so as to be switchable between a locked position and an unlocked position, and is biased toward the locked position by an elastic member. 1. An article feeding device comprising: a member; and a cam surface provided at the front end of the guide rod for switching the locking member to an unlocked position.