JPS6138085B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shuttle conveyor that stores the presence or absence of a conveyed object ahead in the feeding direction and performs a feeding operation of the conveyed object depending on the presence or absence of the conveyed object ahead of the conveyed object. .

Previously, this type of shuttle conveyor had a structure in which a dog attached to the shuttle frame was given an elastic force that protruded above the shuttle frame, and the dog always pushed the conveyed object as the shuttle frame moved forward. When the frame returns,
The dog is pushed down by the conveyed object against the elastic force, and moves by rubbing against the lower surface of the conveyed object. Therefore, there is a risk that the conveyed object will be abraded by the dog each time the shuttle frame returns during reciprocating motion, which is inconvenient.

In view of the above points, we have already developed and proposed a new shuttle conveyor in which the dog reliably retracts below the conveying surface during the return movement of the shuttle frame so as not to scrape the underside of the conveyed object.

In other words, the already proposed new shuttle conveyor is provided with a horizontal shaft on a reciprocating shuttle frame, rotatably provided with a leg member to which a downward elastic force is applied to the horizontal shaft, and a guide roller is provided at the lower end of the leg member. On the other hand, a shuttle frame of the dog rail that rotates in conjunction with the rotation of the leg member to support the dog member, which moves in and out of the conveyor conveyance surface up and down as a boundary, on the horizontal shaft, and guides the guide roller. A notch into which the guide roller falls is formed at a position corresponding to the guide roller at both ends of the reciprocating operation, and the leg member and the dog member are reversely rotated by the stop action of the rail notch on the guide roller at both ends of the shuttle frame reciprocating operation. When the shuttle frame moves forward, the dog member stands up and protrudes to push the conveyed object, and when the shuttle frame moves backward, the dog member is retracted for return operation.

In the previously proposed shuttle conveyor, the dog member reliably moves in and out each time the shuttle frame reciprocates, so that the objects to be transported are reliably sent one by one at regular intervals. Therefore, it is extremely useful for use in a conveyor that has the purpose of sending out objects one by one at regular intervals and one at a time at the output end of the conveyor. In the case of a conveyor that must be stored, the following conveyed objects are reliably pushed forward, so these conveyed objects collide with each other,
This may cause inconveniences such as damage to the transported items.

In view of the above points, the present invention stores information based on the presence or absence of a preceding conveyed object on the sending-out side of the conveyed object, and when there is a preceding conveyed object, the dog member is not raised, and therefore The object of the present invention is to provide a novel shuttle conveyor that does not push the conveyed object forward, and conversely, when there is no preceding conveyed object, the dog member stands up and pushes the conveyed object. .

For this reason, in the present invention, a horizontal shaft is provided in the reciprocating shuttle frame, and a leg member is rotatably provided on the horizontal shaft, which can be moved up and down and which is given a downward elastic force, and a guide roller is attached to the lower end of the leg member. A shuttle for a dog rail that guides the guide roller by supporting the dog member on the horizontal axis that rotates in conjunction with the rotation of the leg member to move in and out vertically with the conveyor conveyance surface as a boundary. Notches are formed at the positions corresponding to the guide rollers at both ends of the frame reciprocating motion, and the weight of the dog member is slightly larger than that of the leg member, and the balance of these weights gives the dog member a tendency to pull in and rotate. A memory piece having a stored elasticity is provided at the proximal end position of the memory piece, and a memory actuating member is provided which faces the memory piece and is movable to press and release the memory piece. The guide roller is brought into elastic pressure contact with the dog rail under pressure of the memory actuating member against the piece, and the guide roller is dropped into the rail notch at both ends of the shuttle frame reciprocating operation, and the leg member and dog member are reversed. Its main feature is that it can be rotated.

The details of the present invention will be explained below with reference to embodiments shown in the drawings.

In the figure, reference numerals 1 and 1 are vertical frames, which support a large number of rollers 2, 2, etc. in parallel, one pair each, similar to a known shuttle conveyor, and constitute the conveyor conveyance surface. This is the unloading side of the transported object 3. The vertical frames 1, 1 are fixed on intermediate stands 5, 5 on the frame 4.

6, 6 is a shuttle frame consisting of a pair of parallel plates, which are integrally connected by horizontal connecting rods 7, 7, and running wheels 8, 8 are mounted on the outside of the lower part, respectively.
has. Also, in the figure, 10, 10 are a pair of running rails fixedly installed on the pedestal 4, and arranged between a pair of vertical frames 1, 1 in parallel with these, and each having a U-shaped cross section as shown in FIG. The open parts are arranged facing inward, and the running wheels 8, 8 run within the open parts of these running rails 10, 10. The reason why the running rails 10, 10 are configured to have a U-shaped cross section and the running wheels 8, 8 run in the open part is because the shuttle frames 6, 6
This is to prevent it from floating while the vehicle is running. A dog rail 11 is provided between the traveling rails 10, 10 for guiding a guide roller provided at the lower end of the leg member, which will be described later.

As shown in FIGS. 2 to 4, a horizontal shaft 12 is provided at the upper central position of the shuttle frames 6, 6, and a pair of leg members 13, 13 are attached to this horizontal shaft 12.
is vertically displaceable and rotatably supported. That is, as shown in FIG. 4, an elongated hole 14 is formed in the upper part of the leg member 13 along the vertical direction of the leg member, and the horizontal shaft 12 is passed through this elongated hole 14. And these leg members 13,1
3 indicates the forward movement direction of the shuttle frame, that is, the conveyed object 3.
overhanging piece 1 oriented in the direction opposite to the conveying direction of
5 and 15, and the leg member 13 is formed into a substantially inverted L shape.

In the figure, 16 is a dog member whose base is connected to the horizontal axis 1.
2, positioned between the pair of leg members 13, 13, and oriented in the same direction as the projecting piece 15 of the leg member 13, with the conveyed object 3 at the tip thereof.
A push plate 17 for pushing is fixed in a hook shape. The tips of the projecting pieces 15, 15 of the leg member 13 are connected to the dog member 16 by a pin 18, so that the leg members 13, 13 and the dog member 16 rotate in conjunction with each other.

A guide roller 1 is provided at the lower end of the leg members 13, 13.
The upper portions of the leg members 13, 13 are pressed downward by a pressing piece 22 fixed to a leaf spring 21 fixed to the upper portion of the dog member 16. Further, reference numeral 23 shown in FIG. 4 is a stopper provided on a plate 24 installed between the shuttle frames 6, 6, which receives the dog member 16, and
6 is prevented from rotating further below the position where it is received by the stopper 23. That is, the weight of the dog member 16 is slightly larger than that of the leg member 13, and the weight balance between the dog member 16 and the leg member 13 gives the dog member 16 a tendency to pull in and rotate, regardless of the elastic force of the leaf spring 21. In this state, that is, when no external force is applied to the leg members 13 and the dog member 16, the guide rollers 19 of the leg members 13 are kept slightly floating above the dog rail 11, and in this state, the shuttle frame is Even if the dog member 16 is reciprocated, the dog member 16 is not moved in and out.

Furthermore, as shown in FIG. 4, a memory piece 25 provided with an elastic force is provided at the proximal end of the dog member 16 so as to protrude. In the illustrated embodiment, the memory piece 25 is made of a leaf spring, but it does not necessarily have to be a leaf spring, and may be any member that has stored elasticity. A memory operating member 26 is provided facing above the memory piece 25 and capable of pressing and releasing the memory piece 25. Under the pressure of the memory operating member 26, a downward rotational force is applied to the leg member 13. The guide rollers 19 of the leg members 13 are brought into elastic pressure contact with the dog rail 11 by overcoming the gravitational balance due to the large weight of the dog member 16, in cooperation with the elastic force of the leaf spring 21.

In the illustrated embodiment, the shuttle frames 6, 6
The memory actuating member 26 is fixed to a rotating shaft 27 which is rotatably passed through a shaft between the two, and the memory actuating member 26 is constituted by a cam member. That is, the memory piece 25 is pressed by the downward rotational movement of the memory actuating member 26, and under the pressure, it engages with the engagement protrusion 28 formed on the memory piece 25, thereby securing the pressed state. be. At one end of the rotation shaft 27 that protrudes outward from the shuttle frame 6, there is an operating rotation lever 2 oriented substantially in the same direction as the orientation direction of the memory actuation member 26.
On the other hand, a pin 30 oriented in the same direction is provided at the other end of the rotating shaft 27 that protrudes outward from the shuttle frame 6 on the opposite side, and this pin 30 and a protruding piece fixed to the shuttle frame 6 A traction spring 32 is stretched between the memory actuating member 26 and the memory actuating member 26 to provide a return rotational force. The pressing operation against the memory piece 25 by the rotation of the memory operating member 26 is performed by the cooperative operation of the operation rotation lever 29 and a sensor pin described later.

In order to prevent the memory operation member 26 from rotating upward more than necessary, a stopper 34 is provided on a plate 33 installed between the shuttle frames 6, 6. Furthermore, as shown in FIG. 4, the memory piece 25 is
The stopper 23 is not necessarily required in the case where the rotation limit is controlled by the weight balance of the dog member 16 and the leg member 13 by contacting the memory actuating member 26.

As shown in FIG. 1, a plurality of shuttle frames 6, 6 incorporating leg members 13, dog members 16, memory pieces 25, and memory operating members 26 are connected at regular intervals by connecting members 35, respectively. The plurality of vertically arranged shuttle frames are connected to each other, and are configured to reciprocate simultaneously by the operation of a drive device, which will be described later. As shown in FIG. 2, the upper surfaces of these shuttle frames 6, 6 are slightly lower than the conveying surface 36, which is the upper surface of the rollers 2. The above shuttle frame 6,6
The drive arrangement is shown in FIGS. 11 and 12. That is, the crank arm 38 of a known crank mechanism 37 operated by a drive motor fixed to the lower immovable part of the frame 4 is connected to the connecting part 39 provided at the lower part of the hanger 39' fixed to the shuttle frame 6. They are connected by a rod 40, and the shuttle frames 6, 6 are reciprocated by crank operation. Of course, this reciprocating drive device is not limited to a crank mechanism, and may be a cylinder or other known reciprocating drive device.

Notches of the dog rail 11 are provided at positions corresponding to the guide rollers of the leg members 13 at both ends of the reciprocating operation of the shuttle frames 6, 6 which reciprocate due to the operation of the reciprocating drive device, that is, at the movement start and end positions of the guide rollers 19. In FIGS. 13 to 17, the cut portion located at the starting end of the movement is designated by the reference numeral 41.
The notch located at the end of the movement is indicated by reference numeral 42. The above-mentioned notches 41 and 42 are indicated by different symbols to make it easier to understand the explanation of the operation described later, but the notches 42 located at the end of movement of the guide rollers 19 of the adjacent shuttle frames 6 and 6 and the start end of movement Of course, it is possible to share the notch 41 located at .

In the figure, 43 is a sensor, and the conveyed object 3 is conveyed by the reciprocating operation of the shuttle frames 6, 6, respectively.
This device is pressed down by the user to detect the presence of a conveyed object, and in the illustrated embodiment is made of a wire rod. That is, a sensor support upright piece 44 is fixed to a stationary part 47 facing the final region of forward movement of each shuttle frame 6, 6, and located outside the traveling rail 10, and a swing lever 45 is attached to this support upright piece 44. A sensor 43 is fixed to the tip of the swinging lever 45, and a traction spring 48 is stretched between the opposite end of the swinging lever 45 and the base of the sensor support upright piece 44. , the sensor 43
is arranged to protrude upward from the conveyance surface 36 (as shown in the sixth figure). A sensor pin 49 is provided on the swing lever 45 to project inward, and the sensor pin 49 is moved up and down in conjunction with the up and down movement of the sensor 43. Also this sensor pin 4
Reference numeral 9 is positioned facing the movement range of the operation rotation lever 29 at the final forward position of the shuttle frame 6, and engages with the operation rotation lever 29 at the upper movement position where there is no conveyed object on the sensor 43. The final movement of the shuttle frames 6, 6 rotates the operation rotation lever 29, rotates the rotation shaft 27, and presses the memory actuating member 26.
On the other hand, there is a conveyed object 3 on the sensor, and the sensor 4
3 is pressed down, the sensor pin 49 retreats from the movement range of the operation rotation lever 29, and this sensor pin 49 does not exert any action on the operation rotation lever 29 (No. 8 (Illustrated).

In the illustrated embodiment, the memory actuating member 26 is actuated by the rotation of the sensor pin 49 and the operating rotation lever 29, but it is also possible to detect the presence or absence of the conveyed object 3 using a phototube, a proximity switch, or a micro switch. The memory actuating member 26 may be configured to press and release the memory piece 25 using a solenoid or the like.In short, it is configured to detect the presence or absence of an object to be conveyed and press and release the memory piece 25. That's fine.

Next, FIGS. 9 and 10 show that the dog member 1
6 is shown as a simultaneous operation device that reliably moves up and down each time it reciprocates and conveys the objects all at once.

That is, this simultaneous actuation device is based on the position of the sensor 43 and the shuttle frames 6, 6 as shown in FIG.
It is positioned on the opposite side with the two in between. In the figure, reference numeral 50 denotes similar support upright pieces erected at opposite positions corresponding to the sensor support upright pieces 44, each of which has a length L.
A letter-shaped lever 51 is supported by a shaft 52, one arm of which is oriented in the same direction as the swinging lever 45, and an operating pin 53 is made to protrude inwardly from the tip thereof. The other downward arms of each of these L-shaped levers are connected by a connecting bar 54 so that the respective L-shaped levers 51 can be rotated at the same time, and this rotation operation causes the operating pins 53 to move up and down simultaneously. There is. That is, they can be operated all at once by operating the operating handle 55 shown in FIGS. 2 and 10.

On the other hand, the rotation shaft 27 of the shuttle frames 6, 6
A storage operating member operating lever 56 similar to the operating rotating lever 29 is provided at a protruding end opposite to one end where the operating rotating lever 29 is provided, and is oriented in the same direction as the operating lever 29. The correlation between the memory operation member operation lever 55 and the operation pin 53 is made similar to the correlation between the operation rotation lever 29 and the sensor pin 49. That is, when the operating pin 53 is in the lower position, it is retracted from the movement range of the memory operating member operating lever 56, and when it is in the upper moving position, they work together to operate the memory operating member 26 all at once.

The operation of the shuttle conveyor of the present invention constructed as described above will be explained below.

When the drive device shown in FIGS. 11 and 12 is operated, the linked shuttle frames 6, 6 are guided by the running rails 10, 10 by the operation of the crank mechanism 37, and reciprocate from side to side in FIG. 1. In a state where all the sensors 43 are pushed down by the conveyed object 3, the memory actuating member 26 does not press the memory piece 25, so the guide roller 19 of the leg member 13 is caused by the weight balance between the dog member 16 and the leg member. The dog member 16 maintains a state slightly raised above the dog rail 11, thereby ensuring that the pushing plate 17 of the dog member 16 is sufficiently retracted to reciprocate, and does not perform any conveying action on the conveyed object. Next, the conveyed object 3 is not present on the sensor 43 located ahead of the forward movement direction of the shuttle frames 6, 6, and the sensor 43
protrudes above the conveyance surface 36, and the sensor pin 4
9 is in the upward movement position, the most rotating lever 29 of the rotating shaft 27 hits the sensor pin 29 in the final region of forward movement of the shuttle frame 6 (as shown in Figure 13). As a result, when the shuttle frame 6 moves slightly in the final region of forward movement, the operation rotation lever 29 is prevented from moving as it is, and the operation rotation lever 29 is rotated counterclockwise in FIG. 13. At the same time as this operation, the rotation shaft 27 also rotates in the same direction, and the memory actuating member 26 also rotates in the same direction to press the memory piece 25. In this state, the leg member 13 and the dog member 16
13, and the elastic force of the memory piece 25 and the leaf spring 21 overcomes the weight balance of the dog member 16 to move the leg member 13 downward, and the guide roller 19 is moved for the dog. rail 11
into the notch 41 (as shown in Figure 14). In this way, the shuttle frame 6 is operated to return, but at the initial stage, the restraining force on the operation rotation lever 29 by the sensor pin 49 is released, and the operation rotation lever 29 returns to its original position and rotates due to the restoring force of the spring 32. Although the force is applied, the memory actuating member 26 engages with the engagement protrusion 28 of the memory piece 25, and its return operation is blocked, and the downward elastic force is still exerted on the leg member 13. In this state, the guide roller 19 comes out of the notch 41 of the dog rail 11, and returns while under pressure, remembering that there is no conveyed object 3 (as shown in Figure 15). In this state, the push plate 17 of the dog member 16 is located below the conveyance surface 36 as shown in FIG. 15, and even if the conveyance object 3 exists behind it, it will not scrape the lower surface thereof.

In this manner, the shuttle frame 6 returns to its final position, and as shown in FIG. 16, the guide rollers 19 of the leg members 13 fall into the notches 42. However, even in this state, the memory operating member 26 still maintains the state in which it presses the memory piece 25 (as shown in FIG. 16).

Then, when the shuttle frame 6 switches to the forward motion, the guide rollers 19 of the leg members 13 slip out of the notches 42 and ride on the dog rails 11, so that the leg members 13 and dog members 16 move to the 16th position.
The pushing plate 17 of the dog member 16 projects upward from the conveying surface 36 by rotating counterclockwise in the figure, pushing the conveyed object 3 and at the same time, the engagement between the memory piece 25 and the memory actuating member 26 is released. (Figure 17).

When the conveyed object 3 is sent in this way, the conveyed object 3 pushes down the sensor 43 located at the destination, and as a result, it is not affected by the sensor pin 49 at all, but the guide roller 19 is moved at the final forward position. The leg member 13 and the dog member 16 fall into the notch 41, and at the beginning of the return operation, the leg member 13 and the dog member 16 are rotated in the reverse direction, and when they are in a free state, the return operation is performed.

As mentioned above, the presence or absence of the conveyed object in the conveyance direction is detected by the cooperation of the sensor and the memory operation member, and the conveyed object is pushed forward only when there is no conveyed object in the conveyance direction. However, according to the above configuration, the shuttle frame 6
The object can only be sent by making two reciprocations. Therefore, the apparatuses shown in FIGS. 9 and 10 have made it possible to reliably send subsequent conveyed articles all at once even if the conveyed articles are present at the destination of the conveyed articles.

That is, if all the L-shaped levers are positioned as shown by solid lines in FIG. 10, all the L-shaped levers 51 are rotated counterclockwise in FIG. 10, and the operating pin 53 is raised. If it is moved, the memory actuating member operating lever 56 will surely be rotated by the operating pin 53 each time each shuttle frame moves forward, and the memory actuating member 26 will be actuated.

Therefore, every time the shuttle frames 6, 6, . . . return, the state shown in FIG. 17 can be protruded to push the conveyed objects all at once.

As described above, in the shuttle conveyor of the present invention, the dog member is provided with a memory piece, and this is stored only when there is no preceding conveyed object at the destination of the conveyed object, and the subsequent conveyed object is sent.As a result, the preceding conveyed object is The present invention has the effect of providing a safe conveyor without the risk of colliding the following conveyed articles with each other regardless of whether the conveyed articles are stored therein, and therefore with no risk of damaging the conveyed articles. Furthermore, by adding a simultaneous feeding device, it is possible to feed objects all at once each time the shuttle frame reciprocates, and has the advantage of being extremely versatile.

[Brief explanation of the drawing]

The drawings show an embodiment of the shuttle conveyor of the present invention. Fig. 1 is a schematic plan view of the entire structure with the intermediate part omitted, and Fig. 2 is a partially cutaway enlarged view of the main part shown along the top line of Fig. 1. 3 is an enlarged plan view of the main part, FIG. 4 is a partially cutaway front view of the main part taken along the upper line of Fig. 3, and Fig. 5 shows the dog member, leg member, and dog Figure 6 is a front view of the main parts showing the relationship with the rail, Figure 7 is a front view of the main parts of the sensor mechanism, Figure 7 is a plan view thereof, and Figure 8 is the operation circuit for the sensor mechanism and memory actuation member. Fig. 9 is a plan view showing the simultaneous actuation device, and Fig. 10 is the same simultaneous actuation shown along the upper line of Fig. 9. FIG. 11 is a plan view of the drive device, FIG. 12 is a front view thereof, and FIG. 13 is a rear view of the device.
17 to 17 are operation explanatory diagrams showing the operation states of main parts in order. DESCRIPTION OF SYMBOLS 1... Vertical frame, 2... Roller, 3... Transported object, 5... Shuttle frame, 11... Dog rail, 12... Horizontal shaft, 13... Leg member, 16...
... Dog member, 17 ... Push plate, 19 ... Guide roller, 25 ... Memory piece, 26 ... Memory operation member, 2
9... Operation rotation lever, 36... Conveyance surface, 41,
42...notch, 43...sensor, 49...sensor pin, 52...operation pin, 54...connection bar, 55...operation handle, 56...memory actuation member operation lever.

Claims (1)

[Claims] 1. A shuttle frame that reciprocates is provided with a horizontal shaft, and a leg member that can be vertically displaced and is provided with a downward elastic force is rotatably provided on this horizontal shaft, and a guide roller is provided at the lower end of the leg member. A shuttle frame of a dog rail that is provided with a dog member that rotates in conjunction with the rotation of the leg member to support the dog member that moves in and out vertically with the conveyor conveyance surface as a boundary, on the horizontal shaft, and guides the guide roller. Notches are formed at the positions corresponding to the guide rollers at both ends of the reciprocating operation, and the weight of the dog member is slightly larger than that of the leg member.The balance of these weights gives the dog member a tendency to pull in and rotate. A memory piece with storage elasticity is provided at the end position to protrude,
A memory actuating member is provided facing above the memory piece and is movable for displacement in order to press and release the memory piece, and the displacement of the memory actuating member is made to respond to the detection action of a sensor that detects the presence or absence of a conveyed object; The guide roller is brought into elastic pressure contact with the dog rail under pressure of the memory actuating member against the memory piece, and the guide roller is dropped into the rail notch at both ends of the shuttle frame reciprocating operation, and the leg member and the dog member A shuttle conveyor characterized by rotating inverted. 2. A shuttle frame that reciprocates is provided with a horizontal shaft, and a leg member that can be vertically displaced on this horizontal shaft and is provided with a downward elastic force is rotatably provided, and a guide roller is provided at the lower end of the leg member. Guide rollers at both ends of the reciprocating shuttle frame of the dog rail that guides the guide roller by supporting the dog member on the horizontal shaft that moves in and out vertically with the conveyor conveyance surface as a boundary by rotating in conjunction with the rotation of the dog member. Notches are formed at corresponding positions, and the weight of the dog member is slightly larger than that of the leg members, so that the balance of these weights gives the dog member a tendency to pull in and rotate, and at the same time, the dog member has a stored elasticity at the proximal end position. A memory piece comprising a memory piece is provided in an overhanging manner,
A memory actuating member is provided facing above the memory piece and is movable for displacement in order to press and release the memory piece, and the guide roller is brought into elastic pressure contact with the dog rail under the pressure of the memory actuating member against the memory piece. , a guide roller is dropped into the rail notch at both end positions of the shuttle frame reciprocating operation, the leg member and the dog member are reversely rotated, and the memory actuation member is actuated at an outer position of the shuttle frame. A rotating operating lever is provided, and a sensor is provided that moves up and down depending on the presence or absence of the conveyed object, and the operating rotating lever is rotated at the upward movement position by moving up and down in conjunction with the up-down movement of this sensor. A shuttle conveyor characterized by having a sensor pin that is retracted from the movement range of the operation rotary lever in the downward movement position facing the final forward movement area of the shuttle frame. 3. A shuttle frame that reciprocates is provided with a horizontal shaft, and a leg member that can be vertically displaced on this horizontal shaft and is provided with a downward elastic force is rotatably provided, and a guide roller is provided at the lower end of the leg member. The dog member, which rotates in conjunction with the rotation of the conveyor, moves in and out of the conveyor conveyance surface up and down, is supported on the horizontal shaft, and the dog rail that guides the dog roller is reciprocating.The shuttle frame supports guide rollers at both ends. A notch is formed at the position and the weight of the dog member is slightly larger than that of the leg member, so that the balance of these weights gives the dog member a tendency to pull in and rotate, and at the same time imparts stored elasticity to the base end position of the dog member. A memory piece is provided so as to protrude, and a memory actuation member is provided which faces the memory piece and is movable for displacement in order to press and release the pressure on the memory piece, and when the memory piece is pressed by the memory actuation member against the memory piece. The guide roller is brought into elastic pressure contact with the dog rail, the guide roller is dropped into the rail notch at both ends of the shuttle frame reciprocating operation, the leg member and the dog member are reversely rotated, and the shuttle frame is further rotated. A rotary lever for operating the memory activation member is provided on the outside of the frame, and a sensor is provided that moves up and down depending on the presence or absence of an object to be conveyed. A sensor pin that rotates the operation rotation lever and retreats from the movement range of the operation rotation lever at the downward movement position is provided facing the final forward movement area of the shuttle frame, while a plurality of sensor pins are connected to the shuttle frame. A memory actuation member operation lever separate from the operation rotation lever is provided in each of the above,
The operating pins for operating the memory operating member operating levers are provided so as to be movable up and down facing the final region of forward movement of the respective memory operating member operating levers, so that the respective operating pins can be interlocked to move up and down in unison. A shuttle conveyor characterized by: