JP2020164313A - Supply device - Google Patents

Abstract

To provide a supply device which eliminates clogging in a chute and further maintains supply speed.SOLUTION: A supply device 1 at least comprises: a hollow chute 2 whose lower end opens; a rod 3 liftable and lowerable in the chute 2; and a drive part 4 for driving the rod 3. In this device, the rod 3 comprises a floating mechanism 31 having movability. The rod 3 preferably comprises a protruding part 32, whose cross section of a horizontal section is larger than the rod 3, at the lower end thereof, and the protruding part 32 is preferably provided with a tapered part 33 at the lower side part thereof. Further, the rod 3 is preferably arranged so that the lower end thereof can protrude from a lower end opening part 23b of the chute 2, and its dimension of the vertical direction is preferably longer than the dimension of the vertical direction of the chute 2.SELECTED DRAWING: Figure 2

Description

The present invention relates to a supply device that supplies the loaded work to a predetermined position.

Supply devices such as chutes and hoppers that supply workpieces such as foods, chemicals, chemical substances, and mechanical parts to predetermined positions are used in various fields. In such a supply device, when the work loaded from above is supplied through the supply port provided at the lower end, a lump of work, a so-called bridge, may occur in the chute, and the work is clogged smoothly inside the chute. It is known that the supply is hindered.

A supply device shown in Patent Document 1 is known as a solution to this problem. This supply device is connected to a hopper that supplies a work loaded from above to a predetermined position through a supply port provided at the lower end, a drive unit installed above the hopper, and a tip of the drive unit. It is composed of a rod provided with a large-diameter protrusion, and is configured to break the bridge by moving the rod and the protrusion at the tip of the rod up and down in the hopper.

JP 2001-354324

However, in the supply device shown in Patent Document 1, since the movement of the rod and the protrusion is only a linear motion in the vertical direction, the work forms a cavity in the trajectory of the protrusion, and the bridge is sufficiently broken. There was a problem that was not done. Further, in the case of a screw in which a head or a screw thread is formed and easily entangled with each other to form a lump, there is a problem that it is difficult to sufficiently solve the screw only by a straight motion. Furthermore, in order to widen the contact range, there is a method of making the protrusion at the tip of the rod larger in diameter, but with this method, the protrusion installed near the supply port prevents the work from falling into the supply port. Therefore, there is a problem that the supply speed is lowered. Therefore, in the conventional supply device, it is difficult to prevent the occurrence of a bridge and maintain the supply speed.

The present invention has been created in view of the above problems, and an object of the present invention is to provide a supply device capable of eliminating clogging in a chute and supplying without lowering the supply speed. In order to achieve this object, the present invention comprises, at least, a feeding device comprising a hollow chute with an open lower end, a rod that can be raised and lowered within the chute, and a drive unit that drives the rod. It is characterized by being provided with a floating mechanism having mobility. As a result, the rod can swing, and the tip of the rod comes into contact with a wide range of workpieces. Further, the rod preferably has a protrusion having a wider cross-sectional area in a horizontal cross section than the rod at the lower end thereof, and the protrusion is characterized in that a tapered portion is provided on a lower portion thereof. It is preferable to do so. Further, it is preferable that the lower end of the rod is arranged so as to project from the lower end opening of the chute, and that the vertical dimension thereof is longer than the vertical dimension of the chute.

According to the present invention, the swing of the rod makes it possible to come into contact with a wide range of workpieces regardless of the thickness of the rod, so that bridging is less likely to occur and the fall of the workpiece is not hindered. There are advantages such as the supply speed does not decrease. Further, when ascending, the protrusion provided at the lower end of the rod lifts and stirs the work, so that there is an advantage that the bridge can be efficiently unraveled. Further, since there is a tapered portion on the lower portion of the protruding portion, the protruding portion penetrates so as to push the work apart when the rod is lowered. This has the advantage of preventing damage caused by excessive pressing of the work. Further, since the lower end of the rod can protrude from the lower end opening of the chute, there is an advantage that even if a bridge should occur near the supply port, it can be destroyed. Moreover, since the rod is configured with the above-mentioned dimensions, the driving unit is always located above the chute. Therefore, the drive unit does not collide with the work, and there is an advantage that the drive unit is prevented from being damaged.

Perspective view of the supply device according to the present invention Partial cut-out sectional view from the front showing the structure of the supply device according to the present invention. Partial cut-out sectional view from the side showing the structure of the supply device according to the present invention. Partial cut-out sectional view from the front showing the swinging motion of the rod of the supply device according to the present invention. Partial cut-out sectional view from the front showing the raising and lowering operation of the piston rod of the supply device according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIGS. 1 to 3, reference numeral 1 denotes, as an example, a supply device provided on the holding portion 81 of the packaging machine 8. The supply device 1 is arranged on the holding portion 81, and has a chute 2 that supplies the work to a predetermined position below, a rod 3 that can be raised and lowered in the chute 2, and a drive unit 4 that drives the rod 3. And.

In the holding portion 81 of the packaging machine 8, a hole 82 into which the supply port 22 of the chute 2 described later can be inserted is formed through in the vertical direction, and a tubular member 83 is provided below the hole 82. The tubular member 83 is formed with a discharge hole 84 that is wider than the lower end opening 23b of the drop hole 23 of the chute 2, which will be described later, over the entire length, and the discharge hole 84 is continuous with the hole 82 of the holding portion. It is arranged to do. Further, the wrapping machine 8 includes a means for forming a strip-shaped film (not shown) into a tubular shape (not shown) and a means for fusing the lower ends of the tubular film (not shown) into a bag shape (not shown). A bag (not shown) is formed so as to cover the tubular member 83. Further, the packaging machine 8 is configured to output a start signal to the straight drive source 41 of the supply device 1 and the work loading device (not shown) after the bag is formed. The charging device is configured to load a predetermined amount of work into the chute 2 when a start signal is received from the packaging machine 8.

The chute 2 is a hollow funnel-shaped member including an inverted quadrangular pyramid-shaped main body 21 and a square tubular supply port 22 connected to the lower end of the main body 21, and the supply port 22 is the packaging machine 8. It is inserted into the hole 82 formed in the holding portion 81 of the. The chute 2 is formed through a drop hole 23 having a rectangular horizontal cross section so that the work can pass through the entire length in the vertical direction, and the drop hole 23 is configured to become larger toward the upper side. Has been done. The drop hole 23 has a vertically configured vertical portion 24 at a position facing the loading device, and a protective plate 25 made of a highly rigid metal is inscribed in the vertical portion 24. There is. Further, at the upper end of the vertical portion 24, horizontal planes 26, 26 are provided so as to project above the drop hole 23, and the first support members 44, 44 of the drive portion 4 stand on the horizontal planes 26, 26. Will be set up. A second support member 45 is arranged at the upper ends of the first support members 44, 44 so as to bridge the second support member 45, and a straight drive source 41 is suspended and supported by the second support member 45. With this configuration, the straight drive source 41 is located above the supply port 22. Further, a plate-shaped member 27 is provided on the outer surface of the vertical portion 24, and the plate-shaped member 27 is fixed to a metal member 85 provided on the holding portion 81.

The straight drive source 41 is a double-acting air cylinder that is connected to an external power source (not shown) such as a compressor, and the piston rod 42 expands and contracts due to compressed air from the power source. The piston rod 42 Are arranged so as to extend downward. A plate-shaped rod holding portion 43 is fixed to the lower end of the piston rod 42, and the rod 3 is suspended and supported by the rod holding portion 43. As a result, the rod 3 is located directly above the supply port 22 of the chute 2. The rod 3 is provided with a floating mechanism 31 having mobility such as a floating joint at a connection portion with the rod holding portion 43, and is configured to be swingable around the floating mechanism 31. Further, the rod 3 is provided with a protrusion 32 having a wider cross-sectional area in a horizontal cross section than the rod 3 at the lower end thereof, and the lower portion of the protrusion 32 has a tapered shape. Is provided with a tapered portion 33. Further, the vertical dimension of the rod 3 is sufficiently longer than the vertical dimension of the chute 2, and when the piston rod 42 extends to the lowermost position, the lower end of the protrusion 32 located at the lower end of the rod 3 is formed. It is configured so that it slightly protrudes from the lower end opening 23b of the chute 2 and the rod holding portion 43 is always higher than the upper end opening 23a of the drop hole 23 of the chute 2. Further, in the straight drive source 41, the stroke of the piston rod 42 is configured to be equal to or larger than the maximum dimension of the work. The straight drive source 41 is configured to operate for a predetermined time when it receives a start signal from the packaging machine 8.

Next, the operation of the supply device 1 of the present invention will be described.
The packaging machine 8 forms a bag (not shown) so as to cover the tubular member 83, and then outputs a start signal to the supply device 1 and the charging device. The loading device that has received the start signal from the packaging machine 8 loads the work into the chute 2 from the upper end opening 23a of the drop hole 23 of the chute 2. At this time, since the rod holding portion 43 and the straight drive source 41 are arranged above the upper end opening 23a of the drop hole 23 of the chute 2, they do not collide with the inserted work. Therefore, it is possible to prevent damage to the straight drive source 41 and the work from jumping out of the chute 2 due to the collision of the workpieces. The work put into the chute 2 in this way falls to the supply port 22 along the inner wall of the drop hole 23 of the chute 2. At this time, since the protective plate 25 is provided on the vertical surface 24 of the chute 2, direct collision between the work and the chute 2 is prevented, and the chute 2 is prevented from being worn even in long-term use.

On the other hand, the straight drive source 41, which receives a start signal at the same time as the input machine, operates a power source and raises and lowers the piston rod 42 and the rod 3 interlocked with the piston rod 42 by the compressed air from the power source. .. At this time, since the rod 3 is configured to swing around the floating mechanism 31, the rod 3 is tilted by the external force received from the loaded work as shown by the alternate long and short dash line in FIG. By moving the tilted rod 3 up and down, the rod 3 can come into contact with a wide range of workpieces, and the occurrence of a bridge is prevented. Moreover, since the rod 3 can be in contact with a wide range of workpieces due to the inclination of the rod 3, the protrusion 32 arranged near the supply port 22 can be made smaller than before, and the workpiece does not fall. Therefore, even when the work is easily entangled with screws or the like, bridging is unlikely to occur and smooth supply is possible.

Further, when a bridge is generated near the supply port 22, since the rod 3 is configured with the above dimensions, when the rod 3 is lowered as shown in FIG. 1, the protrusion 32 at the tip of the rod 3 is formed in the drop hole 23. It reaches the lower end opening 23b and can press the bridge. At this time, since the tapered portion 33 is formed on the lower portion of the protruding portion 32 at the tip of the rod 3, the protruding portion 32 penetrates so as to push the workpiece apart. As a result, the work is prevented from being excessively pressed, and the work and the supply device 1 are prevented from being damaged. When the protrusion 32 that has entered the work in this way rises, it lifts the work that is in contact with the upper surface of the protrusion 32. As a result, the work is agitated, so that the generated bridge can be released. At this time, since the stroke of the piston rod 42 and the rod 3 interlocking with the piston rod 42 is equal to or larger than the maximum dimension of the work, a gap sufficient for the movement of the work is formed in the vicinity of the supply port 22 as shown in FIG. As a result, the work can be easily dropped to the supply port 22 when the protrusion 32 is raised, so that smooth supply is possible.

As described above, the work that has passed through the drop hole 23 of the chute 2 passes through the discharge hole 84 of the tubular member 83 and is supplied to the bag. At this time, since the discharge hole 84 is wider than the lower end opening 23b of the drop hole 23, the work is supplied into the bag without being clogged in the discharge hole 84. At this time, since the bag is formed so as to include the tubular member 83, the work that has passed through the discharge hole 84 does not go out of the bag, and all of the work is supplied into the bag.

The supply device 1 according to the present invention is not limited to the above-mentioned one, and various modifications can be made without departing from the spirit of the invention. For example, the number of rods 3 is not limited to two, and the number of rods 3 may be changed according to the size of the chute 2. Further, in the present embodiment, the wrapping machine 8 outputs the start-up signal, but the supply device 1 is provided with a push button switch, a sensor for detecting the input of the work, and the like, and these are configured to output the start-up signal. But it's okay.

1 Supply device 2 Chute 22 Supply port 23 Drop hole 3 Rod 31 Floating mechanism 32 Protrusion 41 Straight drive source 42 Piston rod 8 Packaging machine

Claims (5)

At least in a supply device including a hollow chute with an open lower end, a rod that can be raised and lowered in the chute, and a drive unit that drives the rod.
The rod is a feeding device provided with a movable floating mechanism. The supply device according to claim 1, wherein the rod is provided with a protrusion having a horizontal cross-sectional area wider than that of the rod at the lower end thereof. The supply device according to claim 1 or 2, wherein the protruding portion is provided with a tapered portion on a lower portion thereof. The supply device according to any one of claims 1 to 3, wherein the rod is arranged so that its lower end can protrude from the lower end opening of the chute. The feeding device according to any one of claims 1 to 4, wherein the rod has a vertical dimension longer than the vertical dimension of the chute.

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