JPS6210213Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a feeding device for feeding a trolley from an upper drive line to a lower drive line in a trolley conveyor, and uses a cylinder unit to reciprocate a pusher for feeding the trolley. The purpose is to solve the problems of the conventional configuration.

An embodiment of the present invention will be described below based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a transport trolley, and a front trolley 2 and a rear trolley 3 are connected by a connecting rod 4. It is equipped with horizontal axis rollers 6, 7 that fit on a pair of left and right guide rails 5, and vertical axis rollers 8, 9 for steady rest that fit between both guide rails 5,
Front trolley 2 has trolley push shear 10
a vertically movable dog 11 that engages with the dog 1;
The rear trolley 3 is provided with a cam protrusion 13 for operating the lever 12 of the succeeding front trolley 2 to lower its dog 11, which is conventionally known.
The trolley pusher 10 is propelled by a drive chain 16 suspended from a guide rail 14 via a trolley 15.The drive chain 16 is connected to an upper drive line 17 and a lower drive line 18. It is set separately. 19,20
is a guide tooth wheel that rotates while meshing with the drive chain 16 at the terminal end of the upper drive line 17 and the start end of the lower drive line 18.

21 is a pushchair for transferring the trolley;
As shown in FIGS. 1 and 4, a vertical shaft is attached to the bottom of a reciprocating cart 24 supported via wheels 23 on a pair of left and right guide rails 22 arranged parallel to the sides of the trolley guide rail 5. It is pivoted at 25. As shown in FIG. 3, a roller 27 is supported by a vertical shaft 26 on a portion 21a of the pusher 21 extending outward from the vertical shaft 25.
By coming into contact with the trolley, the pusher 21 cannot rotate rearward from the trolley support position A. Reference numeral 28 denotes a tension coil spring that is tensioned horizontally between the outwardly extending portion 21a of the pusher 21 and the free end of a bracket 29 connected to the bottom of the reciprocating carriage 24. This is to stabilize the posture alternatively between the boosting posture A and the non-working posture B, which is swung forward and laterally.
Note that even in the non-working position B, the roller 27 contacts the guide rail outer surface 22a to prevent further rotation. The pusher 21 is at a height capable of pushing back the rear end vertical shaft roller 9 of the rear trolley 3.

In FIG. 1, reference numeral 30 denotes a winding driving means, which has two gear wheels 31,
A drive chain 33 is provided between the drive chain 32 and the reciprocating carriage 24.
are connected by a link 34. The link 34 is pivotally connected to the bracket 29 on the side of the truck 24 with a vertical axis concentric with the pusher pivot vertical axis 25. As shown in FIGS. 1 and 5, one of the gear wheels 32 that hangs the drive chain 33 is connected to the drive chain at the terminal end of the upper drive line 17 by an interlocking means 41 consisting of gear trains 35 to 40. It is interlocked and connected to the guide gear wheel 19.

In FIG. 1, 42 is a stopper that switches the pusher 21 to the non-working position B at the end of the forward stroke, and 43 is a stopper that switches the pusher 21 to the boosting position A at the end of the backward stroke. This latter stopper 43 is biased forward by a spring built-in biasing means 44 and can move rearward when overloaded. 45 is cam 46
This is an overload detection switch that detects rearward movement of the stopper 43 via.

Next, the operation will be described.
By the rotation of the drive chain 16, the drive chain 33 of the winding drive means 30 rotates in conjunction with the link means 41, and the reciprocating carriage 24 is reciprocated along the guide rail 22 via the link 34. Therefore, the pusher 21 advances while maintaining the pushing position A, and just before the end of its forward stroke, the roller 27 abuts against the stopper 42, causing the pusher 21 to move back and forth along the vertical shaft 25.
When the pusher 21 passes the neutral point, the tension of the tension coil spring 28 causes the pusher 21 to rotate to the non-operating position B. By this action, the pusher 21 is switched to the non-operating position B at the end of the forward stroke.
The pusher 21, which moves backward in the non-operating position B, rotates backward about the vertical shaft 25 against the tension coil spring 28 when the roller 27 abuts against the stopper 43 just before the end of the return stroke. When the pusher 21 passes the neutral point, the tension of the tension coil spring 28 causes the pusher 21 to return to the pushing position A.
By this action, the pusher 21 is switched to the pushing position A at the end of the return stroke.

On the other hand, the pusher 10, which moves forward due to the rotation of the drive chain 16, propels the transport trolley 1 along the drive line 17 via the dog 11. The interlocking means 4 are arranged at intervals, and the interlocking means 4
A transmission ratio of 1 is set. The pusher 21 then moves to the drive line 1 in the forward stroke S.
The transport trolley 1, which is at position C, where the dog 11 comes off and stops from the pusher 10 that escapes to the side at the end of the rear trolley 3, is moved forward via the rear vertical axis roller 9 of the rear trolley 3.
The dog 11 of the lower drive line 18 is pushed up to a position D where it can engage with the pusher 10 of the lower drive line 18.

Due to the above action, the transport trolley 1 that is successively moved along the drive line 17 is automatically moved to the lower drive line 1 by the pusher 21.
8 and is propelled again by the pusher 10 of this lower drive line 18. When the pusher 21 is on the backward stroke, the next transport trolley 1 enters into the pusher path of this pusher 21, but since the pusher 21 has been switched to the non-working position, the transport trolley 1
Move back to the starting point of outbound movement without contacting. If this pusher 21 reaches the end of the go-around stroke and is switched to the boosting attitude A,
If a situation occurs where the following conveyance trolley 1 collides with the pusher 21, the pusher 2
1 is backed by the transport trolley 1 and forcibly rotated again to the non-working position B, so the stopper 43 is moved backward by the roller 27 against the biasing means 44, and the stopper 43 is moved back by the switch 45.
can be detected and notified that there is an abnormal situation.

As a conventional trolley feeding device of this type, for example, a device described in Japanese Patent Laid-Open No. 54-86186 is known. In this conventional device, the trolley feed pusher is operatively connected to a trolley pusher drive chain in a lower drive line rather than an upper drive line. Therefore, the positional relationship between the pusher returning to the forward stroke start position (the end on the upper drive line side of the reciprocating path) and the pusher moving along the upper drive line is not determined. For this reason, in the conventional device, it was necessary to use a so-called anti-back pusher that can be lowered forward and laterally from a backing position against the biasing force of a spring.

If this anti-back push shear is not properly maintained such as replacing the spindle and spring or lubrication, there is a risk that it will not be able to smoothly and reliably return to the pushing position A when it falls to the non-working position due to the passing push shear. There is.

The present invention does not use an anti-buck pusher with such drawbacks, but instead uses a pusher that can be selectively switched between a trolley support position and a non-working position in which it swings forward and sideways. A pusher posture switching means is used in combination to switch from the pushing posture to the non-working posture when the end of the forward stroke is reached, and from the non-working posture to the boosting posture when the end of the backward stroke is reached.

Therefore, unlike in the prior art, the pusher does not move forward in the outgoing stroke while remaining in a non-operating position, and the trolley can always carry out its feeding action reliably.

On the other hand, since the pusher is forcibly switched from the non-operating position to the boosting position at the end of the go-around stroke, there is a risk that the push shear, which is switching to the boosting position, will collide with the side of the trolley moving on the upper drive line. occurs. However, according to the configuration of the present invention, the drive means for reciprocating the pusher is arranged so that the position of the pusher at the start of forward movement is an intermediate position between the trolleys moving at regular intervals. Since an interlocking means is provided to link the trolley push shear drive chain of the side drive line, it is possible to push the push shear and switch to the boosting position without causing an unreasonable side collision between the push shear and the trolley, and the trolley is always fed safely. can be caused to act.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a side view showing the trolley transfer section of the trolley conveyor, Fig. 3 is an enlarged cross-sectional plan view of the main part of Fig. 1,
FIG. 4 is a longitudinal sectional front view of the same, and FIG. 5 is a side view showing the interlocking means. 1... Transportation trolley, 2... Front trolley, 3... Rear trolley, 5... Trolley guide rail, 10... Trolley propulsion pusher,
14... Drive chain guide rail, 16... Drive chain, 17... Upper drive line, 18... Lower drive line, 19... Drive chain guide gear,
21... pusher, 22... guide rail, 2
4... Reciprocating cart, 27... Roller, 28...
...Tension coil spring for maintaining pusher posture, 30
...Wrap drive means, 34...Link, 35-4
0...Gear train, 41...Interlocking means.

Claims (1)

[Scope of utility model claims] Beside the trolley transfer path from the upper side drive line to the lower side drive line, a pusher that can be selectively switched between a trolley support position and a non-working position swung forward and sideways is reciprocated along the trolley transfer path. A movable drive means for reciprocating the pusher is arranged on the upper drive line so that the pusher's position at the start of forward movement is intermediate between the trolleys moving at regular intervals. An interlocking means is provided for interlocking with a trolley push shear drive chain, and the push shear is switched from a boosting attitude to a non-working attitude when the end of the forward stroke is reached, and from the non-working attitude to the pushing attitude when reaching the end of the homeward stroke. A trolley feeding device for a trolley conveyor, which is provided with attitude switching means.