JPS6014743B2 - storage conveyor - Google Patents

Description

[Detailed Description of the Invention] This invention allows objects to be carried in at any timing to be packed and stored sequentially at a fixed pitch from the outlet end of a conveyor, and when the objects are conveyed from the outlet end, etc. The present invention relates to a storage conveyor that can sequentially pack and store subsequent conveyed items to fill the empty spaces.

BACKGROUND ART In transporting workpieces in a manufacturing line, sorting cargo, etc., it is now necessary to transport items that are brought in at random timings at a fixed pitch or at an arbitrary timing that is different from the delivery timing.

For this purpose, storage conveyors are used which have the functions listed at the outset. Listing the main types of storage conveyors that have been used in the past, the simplest one is a free roller conveyor that has a slight slope and is self-propelled toward the tip by the component force of the conveyed object's own weight in the direction of the conveyor. Then, the stopped preceding conveyed items are stopped and packed and stored.

This type of bag counterfeiting is not suitable for heavy items because a shock is applied when the item is stopped. In addition, in the case of a type in which horizontally installed free roller slats are constantly driven in the conveying direction by a chain conveyor, the impact on the conveyed object is considerably eliminated; however,
Since the rollers continue to rotate at the bottom of the conveyed object even after the conveyed object has stopped, there is a drawback that both the conveyed object and the rollers tend to loosen.
In addition, a moving chain that contacts the bottom of the conveyed object is installed between two horizontal free roller conveyors arranged in parallel. In the type of conveyor that conveys the conveyed object by friction between the chain and the chain, even after the conveyed object has stopped, the bottom surface of the conveyed object is easily rubbed by the chain and gets scratched. Furthermore, in the case of the above-mentioned type of misalignment, the carrying force by the own weight or the driving means is applied to the preceding conveyed object as line pressure, making it impossible to take out the conveyed object from any position other than the tip.The above-mentioned line Although means have been proposed for alleviating pressure and preventing its accumulation, ``it still adds a certain amount of line pressure and has the disadvantage that it is mechanically difficult to transport heavy objects.'' This invention This eliminates the above-mentioned drawbacks, does not apply fin pressure to the conveyed items during storage, and can be stored at appropriate regular intervals.
It is an object of the present invention to provide a storage conveyor with a simple structure capable of transporting objects from any position.

Hereinafter, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

FIG. 1 is a diagram schematically showing an embodiment in which the present invention is applied to a storage conveyor for storing workpieces in a production line, and includes a horizontal conveyor 20 for transporting workpieces,
A shuttle bar is provided parallel to the conveying surface 21 below the conveying surface 21 of the conveyor and makes a reciprocating motion with a predetermined stroke in the conveying direction of the conveyor, and a dog is attached to the upper surface of the shuttle bar at a constant workpiece storage pitch. 2, a workpiece detection lever 8 attached at the same pitch to a fixed part such as a conveyor, and a guide bar 10 for maintaining the posture of each dog over a certain range of the reciprocating stroke of each dog. It is constructed as a main component.

The conveyor 20 is composed of two horizontal free roller conveyors or seals installed in parallel, and has a structure that supports the load of the workpiece and allows the workpiece to move freely in the transport direction. Continuing the explanation with reference to Figures 2 and 3, the shuttle bar 1 is formed of channel steel placed below between the above two strips with the web facing upward. is wheel 5 at an appropriate pitch.
and side rollers S are attached.

These wheels 5 and side rollers 6 are connected to the shuttle bar 1
Guide rails made of angle iron fixed on both sides of the ? By moving along the upper surface of the horizontal side and the inner surface of the vertical side, the shuttle bar is guided in parallel to the conveying direction of the river conveyor, and reciprocating motion of a predetermined stroke is performed by a drive device (not shown). A pair of brackets 1 are installed on the top surface of the shuttle bar at a predetermined workpiece storage pitch.
1 is welded, and a dog 2 is rotatably supported via a pin 12.

As shown in FIG. 2, the dog 2 has a pair of side plates 2a extending rearward and diagonally upward forward from its pivot point, and a wheel weight 13 is attached between the both plates at the rear end. With this wheel weight 13, the dog 2 is positioned in the state D-1 shown by the solid line in FIG. It is impossible to rotate. In this state, the front surface of the head of the dog 2 is vertical, and the dog 2 is in an operating state in which the head protrudes above the conveyance surface 21 of the conveyor. A face plate 14 is provided in the vertical part of the front surface of the head, connecting both side plates, and the dog 2 in the operating state pushes the rear surface of the workpiece with the front surface of this face plate 14 to move it forward by one pitch. In FIG. 3, a guide pin 4 is provided near the rear end of the outer surface of the left side plate 2a. The guide pin 4 is covered with a rotatable roller sleeve 4. On the outer surface of the right side plate 2a, a protruding plate 3 is provided parallel to the front line of the side plate from its upper end to the vicinity of the wisteria fulcrum. This projection plate 3 is formed as a separate member from a part parallel to the vertical part of the front surface of the dog and an inclined part below it.The upper projection plate 3a is fixed to the dog side plate 2a, and the lower projection plate 3b is formed by the upper projection The lower protruding plate 3b is attached to the lower end of the plate 3a with a hinge so that it can swing freely.The lower protruding plate 3b is positioned in the position shown in FIG. Swinging forward from this point is restricted. Fig. 2 shows a state in which the shuttle bar 1 has reached its stalk's forward movement limit position.

(In the figure, the stroke of the pin 12 is indicated by S, S, indicates its forward limit position, and S2 indicates its backward limit position.) In this state, the front surface of the dog 2 is the rear surface of the workpiece at the workpiece storage position x. is in contact with. The workpiece detection lever 8 is located on the side.
The bent portion is rotatably supported on a fixed part such as a conveyor by pins 16 provided at the same pitch as the dogs.

The center of gravity of the workpiece detection lever 8 is located far below the bag fulcrum, so when it is not restrained, the part below the bag fulcrum becomes almost vertical due to gravity, as shown by the chain line in Figure 2, and the head is The state is C-2, which projects upward from the conveyor transport surface 21. When the workpiece is pushed by the dog 2 and conveyed, the workpiece detection lever 8 is pushed by the front side of the workpiece and rotates clockwise around the pin turtle 6, and when the workpiece is stopped at the storage position, As shown by the solid line in the second session, the upper end of the head of the workpiece detection lever 8 is in contact with the lower surface near the rear end of the workpiece, and the lower part is inclined from the pivot point C-1
The workpiece is detected.

In some cases, the workpiece detection lever 8 is restricted by a stopper (not shown) so that it cannot be moved further clockwise from this position. A dog control pin 9 is provided on the side surface facing the dog 2 near the lower end of the workpiece detection lever 8 . When the workpiece detection lever 8 is in the workpiece detection state of C-1, the dog control pin 9 is located above the lower end of the projection plate 3 of the dog 2 that is in the operating state of D-1, and the workpiece detection lever When the dog control pin 9 is in the state C-2 in which the dog 8 is not restrained by the workpiece, the dog control pin 9 is located below the lower end of the protruding plate 3 of the dog 2. Therefore, when the workpiece detection lever 8 is detecting a workpiece, when the shuttle bar 1 retreats and the dog 2 moves backward, the protruding plate 3 of the dog 2 and the dog control pin 9 of the workpiece detection lever 8 will interfere. , as the dog 2 retreats, the protruding plate 3 moves the dog control pin 9
The dog 2 slides while being pushed down, rotates clockwise around the pin 12, and is displaced to the state D-2 shown by the chain line in the figure, in which the head is retracted below the conveyor conveyance surface 21. During a certain range of the stroke of the reciprocating motion of each dog, a guide bar 10 formed of angle iron is fixed to a fixed part of a conveyor or the like and is provided generally horizontally. has a shape and position such that the guide pin 4 of the dog 2 in the above-mentioned state D-2 is smoothly guided along the upper surface of the guide bar 10 when retracting. It is provided at a height such that the head is held and guided further down to the limit position as indicated by the chain line D-3 in the figure.

Since this device is configured as described above, there is a certain workpiece storage position x on the conveyor and a storage position y following the workpiece storage position x on the conveyor.
The workpiece conveyance operation is performed as follows for various combinations of cases where there is a workpiece or not.

{ii) When there is no workpiece at both storage positions x and y (see Figure 4).

The detection lever solution for detecting a counterfeit work x in the storage position is in a state C-2 in which the neck protrudes above the conveyance surface.

Even if the dog 2 starts to move backward due to the backward movement of the shuttle bar 1 at the forward limit position, the protruding plate 3 of the dog 2 and the dog control pin 9 of the workpiece detection lever 8 do not interfere with each other, so that the dog 2 does not move forward. The dog 2 remains in the state D-1) when it moves backward (with the state of the D-blade in which the part protrudes above the conveying surface 21), and moves one stroke to the backward limit position. When the dog 2 moves backward until it reaches the forward stroke, the dog 2 is continuously fed in state D-1).{o} There is no workpiece at the storage position x,
When there is a workpiece Y at the storage position y (see Fig. 5), the dog 2 starts to move backward as the shuttle bar 1 moves backward.
Until the back of the dog's head touches the front end of the workpiece Y,
The same operation is performed, but after contacting the front end of workpiece Y,
As the dog 2 retreats, the head is pushed by the lower edge of the front end of the workpiece Y, causing the dog to rotate clockwise, and the guide piston 4 of the dog 2 traces the trajectory shown by B in Figs. 2 and 5, and the dog moves forward. Guide pin 4 passes through the bottom of guide bar 0 while the upper end of the head of 2 rubs the bottom surface of the workpiece Y, retreats to near the rear end position of one stroke, and its head comes off the rear end of the bottom surface of the workpiece Y. and,
The dog 2 is in the upright state D-1, and its head protrudes above the conveyance surface.

Next, when the dog 2 moves to a forward stroke, the workpiece Y is pushed forward by one pitch with its rear end surface pushed by the front surface of the head of the dog 2, and is transported to the storage position x. In the process, the lower green part of the front surface of the workpiece Y hits the head of the workpiece detection lever 8, and the workpiece detection lever 8 is rotated clockwise to bring it into the C-rich state. As a result, the dog control pin 9 rises, so that the front south of the lower part of the projection plate 3 of the dog 2, which has moved forward while pushing the workpiece in the state D-1, supports the dog control pin 9. However, since the lower members 3b of the protrusion plate 3 can swing backward from the normal position, the protrusion plate 3 climbs over the dog control pin 9 and the dog 2 moves to the forward limit position. 1. Storage hawk x
When there is a workpiece X at (see FIG. 6), the workpiece detection lever 8 for detecting the workpiece at the storage position x is pushed down by the lower surface near the rear end of the workpiece X and is in a C-turtle position. With the backward movement of the shuttle bar 1 at the forward limit position, the dog 2
When the machine starts to move backward from the forward limit position, the protrusion plate 3 of the dog and the dog control pin 9 of the workpiece detection lever 8 interfere,
As dog 2 moves backward, dog 2 gradually tilts to "D-2".
The state will be as follows. In this process, the guide pin 4 traces a trajectory A as shown in FIG. 2 and rests on the upper surface of the guide bar turtle Q. Thereafter, as the dog 2 moves backward, the guide pin 4 rolls on the upper surface of the guide bar 10, and the dog, while maintaining the state of D-3, retreats to the retracted eye position, and maintains this state at that position. . Even when moving to the forward stroke, the guide pin 4 rolls on the guide bar turtle 0 and the dog remains in the state of ○3), so even if there is a workpiece at the storage position y, the workpiece cannot be forwarded. Not done. As detailed above, when a certain workpiece storage position on the conveyor becomes vacant due to the reciprocating movement of the shuttle bar, the subsequent workpieces are sent out one pitch at a time to fill the vacant position, and are sequentially sent to the discharge side of the conveyor. go.

An example of this situation is shown in FIG. 7.

In the figure, a conveyor with five storage positions is
One workpiece W1 is placed at both ends of the carry-out side and the carry-in side as shown in the figure.
, W2, and if the space in front of it is empty, W2 advances one pitch at a time and is sent to the next position of WI through the process of 'roll→0. During this time, the next workpiece W3 carried in is similarly moved forward one pitch at a time until the front part is empty, and is brought to the next position after W2 after going through the process of loading. Next, when WI is carried out, W2 fills its place and W3 also moves forward, and a new workpiece W4 carried in also moves forward every time the previous position becomes vacant, and through the process of N river joining, W2, W3, W4 is packed and stored from the front. As described above, according to the present invention, by reciprocating the shuttle bar by repeating a constant stroke, it is possible to sequentially pack and store the conveyed items from the unloading machine at a constant pitch,
It has an extremely simple structure and is easy to maintain.

Furthermore, since detection of conveyed objects, signal transmission, dog state control, etc. are all performed mechanically, there are fewer accidents such as breakdowns and malfunctions compared to electrical control. Furthermore, since the conveyed objects do not come into contact with each other during storage and the line brake is not applied, there is little damage to the conveyed objects, and the conveyed objects can be moved not only from the tip of the conveyor but also from any intermediate position as necessary. Excellent effects such as being able to be carried out freely can be obtained.

[Brief explanation of the drawing]

Fig. 3 is a side view showing the general configuration of the embodiment of the present invention, Fig. 2 is an enlarged side view of the main part, and Fig. 3 is m in Fig. 2.
``Figures 4 to 6 are schematic diagrams illustrating the forwarding action of conveyed objects corresponding to the presence/absence of conveyed objects at the storage position on the conveyor.'' Figure 7 is a cross-sectional view taken along the -m line. It is a schematic diagram chronologically showing an example of the storage action by the conveyor. Force...Shuttle bar, 2...Dog, 3...Protrusion plate 4...Guide pin, 8...Work detection lever (conveyed object detection means), 9...dog control pin, 10...
...Guide bar 20... Conveyor 21... Conveyance surface Figure 7

Claims (1)

[Scope of Claims] 1. A horizontal conveyor that is placed on a conveyance surface and can move freely in the conveyance direction of conveyed objects, and a horizontal conveyor that is provided below the conveyance surface of the conveyor and that makes reciprocating motion with a predetermined stroke in the conveyance direction. A shuttle bar and an operating state in which the head protrudes above the level of the lower surface of the conveyed object mounted on the shuttle bar at a certain pitch and placed on the conveyance surface, and an inoperative state in which the head is retracted below the level. A dog that can be moved between the two, and a dog that is attached to a fixed member such as a conveyor section with the same pitch as the dog, and that detects the presence or absence of the position and retreats from that position when the presence of the conveyed object is detected. Conveyed object detection means for controlling the dog to be displaced to the inoperative state, and for maintaining the dog in the inoperative position for a certain range including the backward limit position during one reciprocation of the shuttle bar. and a guide bar attached to a fixed part such as a conveyor part between a certain range within the stroke of each dog. 2 The dog is normally maintained in the operating state by means such as a weight or a spring, and is pivotally supported by a shuttle bar so that its head can rotate only in the direction in which the object is transported, and is not affected by the reciprocating movement of the shuttle bar. The conveyed object detection means has a protrusion that interferes with the conveyed object detection means and the guide bar during accompanying movement, and the conveyed object detection means is provided with a weight, a spring, or other means such that when the head is not restrained, the head of the conveyed object is on the bottom surface of the conveyed object on the conveyor conveyance surface. The lever is configured as a lever that protrudes above the level of the dog, is pivotally supported by a fixed member so that the head can rotate only in the direction of movement of the conveyed object, and has a protrusion that interferes with the protrusion of the dog. , a patent claim characterized in that when the lever is rotated due to the head being pushed by an object to be transported, the protruding part thereof interferes with the protruding part of the dog, causing the dog to rotate to a non-operating state. The storage conveyor according to item 1.