JPS6228046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a descending conveyance device that conveys objects to be conveyed downward.

[Technical background of the invention]

This type of device can easily extend the conveyance distance, has excellent conveyance capacity, and can be easily connected to the carry-in conveyor and the carry-out conveyor. a frame having a section and forming a conveyance path between the carry-in section and the carry-out section; and a frame arranged at equal intervals between the carry-in section and the conveyance path of the frame and capable of moving forward and backward from the outside with respect to the carry-in section and the conveyance path. A plurality of supports are formed in the frame and normally protrude into the carry-in section and the conveyance path, and the frame is arranged at equal intervals along the conveyance path and is formed to be movable up and down along the conveyance path. A plurality of vertically movable bodies that are formed to move forward and backward from the outside of the conveyance path and are normally retracted to the outside of the conveyance path, and a plurality of vertically movable bodies that are raised and lowered and objects to be conveyed are supported from the loading section when they are lowered. an elevating drive mechanism for vertically movable bodies that is intermittently conveyed to the unloading section via the body; When ascending, the vertically moving body scoops up the conveyed object on the upper support, and when descending, the vertically movable body is evacuated to the outside of the conveyance path after the conveyed object is received by the lower support and the unloading section. A moving body advancing drive mechanism and a mechanism for retracting each support body to the outside of a carry-in section and a conveyance path when the vertically movable body passes a conveyed object that is scooped up from an upper support body and descended when the vertically movable body is lowered. At the same time, after the conveyed object has passed, each support advances into the loading section and the conveyance path, and when the vertically movable body is lowered thereafter, the conveyed object on the vertically movable body is received by the lower support and the unloading section.The support body is evacuated. A descending conveyance device equipped with a drive mechanism has been devised.

[Problems with background technology]

In such a descending conveyance device, multiple vertically moving bodies are raised and lowered in synchronization, and moved forward and backward in synchronized fashion, so these drive mechanisms tend to be complex, and the timing of forward and backward movements also requires precision. Because of this, there were problems such as complicated control and unstable operation.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and aims to provide a descending conveyance device that simplifies the drive mechanism of a vertically moving body, simplifies its control, and operates reliably. It is something.

[Summary of the invention]

The present invention provides the above-mentioned descending conveyance device, in which the plurality of vertically movable bodies are pivoted at equal intervals at their base ends to elevating rods that are supported by the frame so as to be able to move up and down, and each of the vertically movable bodies has an interlocking rod. By raising and lowering the lifting rod with the lifting drive mechanism, each vertically moving body is synchronously driven up and down, and each vertically moving body is moved forward and backward in synchronization by the interlocking rod. However, the tip end is normally retracted to the outside of the conveyance path by a spring, and the advance drive mechanism for the vertically movable body has an actuating body supported by the frame so as to be movable vertically. The body is descending due to its own weight, and when the vertically movable body is rising, the actuating body contacts the top of the tip of the vertically movable body, and its weight causes the tip of the vertically movable body to advance into the conveyance path, and is then pushed by the vertically movable body. With this configuration, the vertically movable bodies can be moved up and down and moved forward and backward in synchronization with each other, and their forward and backward movements can be mechanically interlocked with the up and down movements.

[Embodiments of the invention]

Next, the present invention will be specifically explained based on an embodiment shown in the drawings.

In FIGS. 1 to 3, 1 is a frame, and this frame 1 is constructed by connecting four columns 2 at predetermined intervals in the vertical direction with horizontal rods 3. is set, and an unloading section 5 is set below, and this loading section 4
A vertical conveyance path 6 is formed between the conveyance path 6 and the unloading section 5, and four vertical guide frames 7 supported by the frame 1 via support members (not shown) are arranged at the four corners of the conveyance path 6. has been done.

11 and 12 are supports, and these supports 11 and 12
are arranged at equal intervals in the vertical direction on both sides of the carry-in section 4 and the conveyance path 6.

As shown in the left part of FIGS. 4 to 6, the uppermost support body 11 disposed on both sides of the loading section 4 has a substantially L-shaped frame plate 14 mounted on a pair of arms 13. A pair of front and rear sprocket wheels 15 are pivotally supported on the vertical end of the frame plate 14, and an endless chain 1 is attached to the pair of sprocket wheels 15.
6 and sprocket wheel 1.
5 is connected to a motor 17 to rotate the endless chain 16, and the arm 13 is connected to a shaft 18 and a
The frame plate 14 is rotatably supported via a pair of bearings 19, and under normal conditions, due to its own weight, the frame plate 14 comes into contact with a stopper 20 attached to the horizontal rod 3, and the endless chain 16 at its tip is inserted into the loading section 4. Although it is expanding, the frame board 1
When the chain 4 is pushed upward, it rotates outward and upward about the shaft 18, and the endless chain 16 at the tip thereof is retracted to the outside of the carry-in section 4.

In addition, as shown in the right part of FIGS. 4 to 6, the plurality of supports 12 disposed on both sides of the carry-out path 6 are arranged so that the tips and intermediate parts of the pair of arms 21 are connected to the plate members 22 and 22. The base end of the arm 21 is rotatably supported by the horizontal rod 3 of the frame 1 via a shaft 24 and a pair of bearings 25, and the arm 21 is connected by a round bar 23. Arm 21
comes into contact with the stopper 26 attached to the horizontal rod 3, and its tip extends into the conveyance path 6. However, when the round rod 23 is pushed upward, it rotates outward and upward around the shaft 24. , the tip thereof is retracted to the outside of the conveyance path 6.

Reference numeral 31 denotes a vertically movable body, and the vertically movable body 31 is arranged on both sides of the conveyance path 6 at equal intervals in the vertical direction, and positioned in front and behind the supports 11 and 12.

The vertically movable body 31 is formed to be able to move up and down along the conveyance path 6. That is, as shown in FIGS. 4 to 6, each vertically movable body 31 is axially extended by an elongated plate-shaped lifting rod 32 with a shaft 33.
The elevating rod 32 is engaged with a vertical guide rail 34 attached to the horizontal rod 3 of the frame 1 via a guide roller 35. In addition, 3
Reference numerals 6 and 37 are sliding members provided on the guide rail 34, respectively, and serve to smoothly move the elevating rod 32 up and down.

In addition, each vertically moving body 31 is pivotally connected to an interlocking rod 38 by a shaft 39, and as shown in the left part of FIG. A coil spring 41 is tensioned between the shaft attachment portion of the interlocking rod 38 and a support piece 40 attached to the lifting rod 32 above this shaft attachment portion, so that the spring is normally 41, the vertically movable body 31 is rotated outward and upwardly, and the outer upper part of its base end abuts a pin-shaped stopper 42 protruding from the lifting rod 32, and its tip end is rotated outward of the conveyance path 6. However, when pushed from above, it rotates inwardly and downwardly around the shaft 33, and the outer lower part of its base end comes into contact with a pin-shaped stopper 43 protruding from the lifting rod 32. The leading end of the vertically movable body 31 extends into the conveyance path 6, and the forward and backward movement of this part of the vertically movable body 31 is transmitted to the other vertically movable body 31 via the connecting rod 38.
Each vertically moving body 31 moves forward and backward in synchronization.

Reference numeral 51 denotes an elevating drive mechanism for the vertical moving body 31. This elevating drive mechanism 51 is provided below the unloading section 5, and engages the output shaft of a motor 52 with a horizontal crankshaft 53 via a gear. A crank arm 54 is attached to both ends of the shaft 53, and a roller is pivotally supported at the tip of the crank arm 54. A crank rail 55, which has a substantially U-shaped cross section and engages with the roller, is installed on both sides of the conveyance path 6. It is constructed by horizontally mounting between the lower ends of a pair of front and rear lifting rods 32 provided, and when the motor 52 is driven, the crankshaft 53 rotates and the crank arms 54 on both sides rotate. As a result, the horizontal crank rails 55 on both sides are moved up and down, the front and rear lifting rods 32 on both sides are moved up and down, and the vertically moving body 31 is moved up and down in synchronization.

Reference numeral 61 denotes a retraction drive mechanism for the supports 11 and 12, and the retraction drive mechanism 61 connects an intermediate portion of the crankshaft 53 rotated by the motor 52 of the elevating drive mechanism 51 to a vertical transmission shaft via a bevel gear. The lower end of this transmission shaft 62 is engaged with a horizontal camshaft 63 via a bevel gear, and the cam 64 is attached to both ends of this camshaft 63, and the cam 64 is engaged with the lower end of this transmission shaft 62. A drive rod 65 with a mating roller pivoted on the lower end is attached to the frame 1.
It is supported on horizontal rods 3 on both sides through bearings 66 so as to be able to rise and fall freely, and as shown in FIGS. 4 to 6, operating bodies 67 and 68 are attached to this drive rod 65. When the motor 52 is driven, the camshaft 63 rotates via the crankshaft 53 and the transmission shaft 62, causing the cams 64 on both sides to rotate, thereby raising and lowering the drive rods 65 on both sides. At this time, the actuating body 67 provided at the upper end of the drive rod 65 pushes the frame plate 14 of the conveyor-like support 11 disposed on both sides of the carrying-in section 4 upward, and at the same time pushes the frame plate 14 of the conveyor-like support 11 disposed on both sides of the carrying-in section 4 upwardly. A plurality of actuating bodies 68 provided in the section push the round bars 23 of the plurality of supports 12 disposed on both sides of the conveyance path 6 upward, and the supports 11 and 12 synchronize to move the loading section 4. and is retracted to the outside of the conveyance path 6. Note that 69 is a rotation stopper for the drive rod 65.

Reference numeral 71 denotes an advancing drive mechanism for the vertically movable body 31. This advancing drive mechanism 71 is provided at the upper part of the frame 1, and as shown in FIGS. A support rod 72 is erected from the frame 1 via a support member (not shown), a stopper 73 is fitted and locked onto the support rod 72, and the actuating body 4 is mounted on the support rod 72 above the stopper 73 so as to be vertically movable. An engaging rod 75 is provided to protrude from the side surface of the actuating body 74 above the uppermost vertical moving body 31, and a weight 76 is fitted to the support rod 72 above the actuating body 74 so as to be vertically movable. When the vertical movement rod 32 is raised by the drive of the motor 52, the vertical movement 31 of the uppermost stage comes into contact with the engagement rod 75 of the operating body 74, and the vertical movement body 3
1 rotates inwardly and downwardly against the spring 41,
When the tip advances into the conveyance path 6 and the outer lower part of the base end comes into contact with the stopper 43, and when it rises further from this state, the vertically movable body 31 cannot rotate any further due to the stopper 43, so the actuating body 74 and wet 76 are lifted and raised along the support rod 72, and the movement of the vertically movable body 31 at the top stage is transmitted to the vertically movable body 31 at each stage below via the interlocking rod 38. Note that the upper end of the lifting rod 32 is provided with a rod that comes into contact with the lower surface of the actuating body 74 when the uppermost vertical movement 31 advances into the conveyance path 6 due to engagement with the engaging rod 75 of the actuating body 74. A pair of projecting pieces 77 are attached via a support plate 78, and the actuating body 74 is further provided with a rotation stopper (not shown) that restricts rotation in the horizontal direction about the support rod 72. ing.

81 is a conveyor; this conveyor 81
is provided toward the front of the frame 1 from the unloading section 5, and a pair of front and rear pulleys 83 are provided on the machine frame 82 on both sides.
It is constructed by mounting an endless belt 84 on a shaft and winding it between the front and rear pulleys 83, and the endless belt 84 on both sides is rotated by a motor (not shown). Note that the width of this carry-out conveyor 81 is narrower than the interval between the vertically movable bodies 31 on both sides in the advanced state.

A conveyor (not shown) is provided in front or behind the uppermost support body 11 which is constituted by the conveyor, and is connected to the conveyor in its advanced state, and a conveyor (not shown) is connected to the unloading conveyor 81 There is.

P is a pallet as an object to be transported, and an article W can be placed on the upper part of this pallet 4.

Next, the operation of this device will be explained with reference to FIG.

The pallet P is transferred from a conveyor (not shown) to the carrying-in section 4.
The motor 17 of the support 11 is
The chain 16 is rotated, and the pallet P is placed on standby in the carry-in section 4.

The motor 52 is driven to rotate the crank arm 54 of the elevating drive mechanism 51.

This causes the crank arm 54 to move as shown in FIG. 7A.
When the rotation starts from the state (A) and moves to (D), the vertical moving body 31 of each stage becomes as shown in FIG. 7B.
After rising from (a) to (d) and passing through the support body 12 and the unloading part 5 at the position (a) during this period,
Immediately before moving to the upper parts of the supports 11 and 12, as shown in FIG.
1 comes into contact with the engaging rod 75 of the actuating body 74 of the advancing drive mechanism 71, and each vertically moving body 31 advances into the conveyance path 6 due to the weight of the actuating body 74 and the weight 76, and then, at the position (c), reaches the maximum position. The upper vertical movement 31 scoops up the pallet P in the carry-in section 4 from the support 11 and raises it.

In addition, at this time, 1 provided at the upper end of the lifting rod 32
The pair of protrusions 77 allow the operating body 74 of the advancement drive mechanism 71 to rise smoothly. That is, if this protrusion 77 is not provided, as shown in FIG. 7D, when the vertically moving body 31 lifts the engagement rod 75, the actuating body 74 and the weight 76 will be tilted and the inner edge of the opposing opening will be tilted. However, if the protruding piece 77 is provided, when the vertical moving body 31 comes into contact with the engagement rod 75 and advances into the conveyance path 6, the protruding piece 77 will be easily bitten into the support rod 72. comes into contact with the lower surface of the actuating body 74, so the actuating body 74 and the weight 76 are not tilted, and the support rod 7
2 and be lifted smoothly.

At the same time, the cam 64 of the evacuation drive mechanism 61 also starts rotating from the state shown in FIG. 7F, and after the pallet P is scooped up by the vertical moving body 31, the drive rod 65 is raised as shown in FIG. each operating body 6
At 7 and 68, the respective supports 11 and 12 are retreated to the outside of the carry-in section 4 and the carry-out section 6.

When the crank arm 54 further rotates from the state (d) in FIG. 7A and returns to the state (a), the vertically movable body 31 at each stage changes from (d) to (a) in FIG. 7B. During this time, when the item W on the pallet P on the uppermost vertical movable body 31 passes through the support 11 that has been supported until now, the drive rod 65 is moved by the rotation of the cam 64. The supports 11 and 12 move forward into the loading section 4 and the conveyance path 6 due to their own weight, and then, as the vertically movable body 31 further descends, the pallet P on the vertically movable body 31
and the item W is received on the lower support 12.

At this time, the uppermost vertical movable body 31 leaves the engagement rod 75 of the operating body 74 of the advancement drive mechanism 71 while supporting the pallet P and the goods W, but the pallet P and the goods W are Since it is under load, it does not retreat from the conveyance path 6 due to the tension of the spring 41, and further descends to the pallet P.
When the article W is received by the lower support body 12, it is retracted to the outside of the conveyance path 6 by the spring 41.

By repeating these operations, the pallets P and articles W carried into the support body 11 of the carry-in section 4 are sequentially and intermittently transferred to the lower support body 12, and the pallets P and articles W carried into the support body 11 of the carry-in section 4 are transferred intermittently to the lower support body 12, and the pallets P and the articles W carried into the support body 11 of the carry-in section 4 are transferred intermittently to the support body 12 below. It is conveyed down to the conveyor 81.

The pallets P and articles W placed on the carry-out conveyor 81 of the carry-out section 5 are then carried out to a conveyor (not shown) by the rotation of the belt 84.

In this way, the pallet P carried into the support body 11 of the carry-in section 4 is transferred in stages to the lower support body 12 by the vertical movement body 31 and conveyed to the carry-out section 5. Even when the conveyance path 6 is long, by increasing the number of intermediate supports 12, there is no need to particularly lengthen the stroke of the vertically movable body 31, and furthermore, even if the number of intermediate supports 12 is increased, the conveyance capacity is reduced. Nor.

When the pallet P is carried in, the pallet P is scooped up from below by the vertical moving body 31 in the carry-in section 4, so there is a considerable degree of freedom in the installation height of the support body 11 constituted by the conveyor.
It is extremely easy to connect to other conveyors, etc.
Also, when carrying out pallet P, pallet 4
Since the conveyor 81 is placed from above in the unloading section 5 by the vertical moving body 31, there is a considerable degree of freedom in the installation height of the unloading conveyor 81, and connection with other conveyors etc. is extremely easy.

In addition, one motor 52 allows the vertically moving body 31 to
In addition, the vertical moving body 31 is moved up and down by a non-powered mechanism using the tension of the spring 41 and the weight of the actuating body 74, etc., using the vertical movement. As a result, the initial cost and operating cost are low, and since each operation is mechanically linked, control is also extremely simple.

Further, in this embodiment, the support body 11 of the carrying-in section 4
Since it is configured with a conveyor, there is no need for other carrying means such as a pusher, and since the carrying out section 5 is provided with the carrying out conveyor 81, it can be easily installed on an existing distribution line by simply connecting it to another conveyor. Just connect to.

In addition, in the above-mentioned embodiment, as shown in FIGS. 8 and 9, the round bar 23 of the support body 12 at each stage
A cylindrical roller 91 may be rotatably fitted to the roller 91, and the round bar 23 may be pushed through the actuating body 68 of the retracting drive mechanism 61. Twelve round bars 23 may be connected by an interlocking rod 92 to synchronize the operations of the supports 12 at each stage. In this case, the actuating body 68 of the retracting drive mechanism 61 may be reduced to only one. You can also do it. In addition, 93 is a stopper ring attached to a round bar.

In addition, in the embodiment described above, the top loading section 4
Although only the support body 11 is constructed of a conveyor, the other supports can also be constructed of a conveyor. In this way, the pallet P can be transported at any position of the support body in the middle of the conveyance path 6. It can be brought in and taken out.

〔Effect of the invention〕

According to the present invention, in a descending conveyance device that sequentially transfers objects to be conveyed in a carry-in section onto a lower support body by raising and lowering a vertically movable body and then conveys them downward to an unloading section, a plurality of vertically movable bodies are pivoted on a lifting rod. The vertically moving bodies are moved up and down in complete synchronization with one drive mechanism, and each vertically moving body is connected via the interlocking lever, so each vertically moving body is The vertically moving body moves forward and backward in perfect synchronization with one drive mechanism,
Moreover, the drive mechanism for performing this forward and backward movement is composed of a spring and an actuating body, and the tension of the spring performs the retracting operation, and the load of the actuating body performs the forward movement, so a driving source is not required. As a result, the device can be simplified and the control can be simplified, and a device that operates reliably can be provided.

In addition, in this descending conveyance device, the vertically movable body for scooping up the conveyed object and the supporting body for receiving the conveyed object are in a stable advancing state after completing their advancing operations, so that the conveyed object can be transferred easily. The process is smooth and reliable, there is little shock applied to the transported objects, and there is no fear of the transported objects falling or being damaged.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the descending conveyance device of the present invention, in which FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 5 is a partially enlarged front view of the same, FIG. 5 is a partially enlarged plan view of the same, FIG. 6 is a partially enlarged side view of the same, FIG. 7 is an explanatory view of its operation, and FIGS. 8 and 9 show modified examples thereof. 8 is a partially enlarged front view thereof, and FIG. 9 is a partially enlarged plan view thereof. DESCRIPTION OF SYMBOLS 1... Frame, 4... Carrying-in part, 5... Carrying-out part, 6... Conveyance path, 11, 12... Support body, 31
... Vertical moving body, 32 ... Lifting rod, 38 ... Interlocking rod, 41 ... Spring, 51 ... Lifting drive mechanism, 61 ... Retraction drive mechanism, 71 ... Advancement drive mechanism, 74 ... Operating body, P ...Pallets as objects to be transported.

Claims (1)

[Scope of Claims] 1. A frame having a carry-in section above and a carry-out section below, and a conveyance path formed between the carry-in section and the carry-out section; a plurality of supports which are arranged in the frame and are movable from the outside with respect to the loading section and the conveying path, and which normally extend into the loading section and the conveying path; and a plurality of supports arranged at equal intervals along the conveying path of the frame. a plurality of vertically movable bodies, which are arranged so as to be movable up and down along the conveyance path, and are also formed to be movable forward and backward from the outside with respect to the conveyance path, and which are normally retracted to the outside of the conveyance path; an elevating drive mechanism for a vertically movable body that raises and lowers the vertically movable body and, when the vertically movable body is lowered, intermittently conveys the object to be conveyed from a carry-in section to an unloading section via each support; After passing through the unloading section, each vertically movable body advances into the conveyance path, and when the vertically movable body subsequently ascends, it scoops up the conveyed object on the upper support, and when it descends, the conveyed object is received by the lower support and the unloading section. an advancement drive mechanism for the vertically movable bodies that retracts each vertically movable body to the outside of the conveyance path after the movement of the vertically movable body; The supports are retracted to the outside of the carry-in section and the carry-out path, and after the conveyed object has passed, each support is advanced into the carry-in section and the conveyance path, so that the objects to be conveyed on the vertically movable body are moved forward when the vertically movable body descends. and a retraction drive mechanism for the support body to be received by the lower support body and the unloading part, and the plurality of vertically movable bodies have their base ends pivoted at equal intervals to lifting rods that are supported by the frame so as to be able to rise and fall freely. In addition to being connected to each other, each of them is pivotally connected via an interlocking rod, and by raising and lowering the lifting rod with the lifting drive mechanism, each vertically moving body is synchronously driven to lift and lower, and each vertically moving body is ,
The interlocking rod advances and retreats synchronously, and the tip of the rod is normally retracted to the outside of the conveyance path by a spring, and the advancing drive mechanism of the vertically moving body is supported by the frame so as to be vertically movable. It has an actuating body, and this actuating body is normally lowered by its own weight, and when the vertically movable body rises, the actuating body comes into contact with the upper part of the tip of the vertically movable body, and its weight causes the tip of the vertically movable body to advance into the conveyance path. A descending conveyance device characterized in that the device is moved upward and then moved upward by being pushed by a vertically moving body.