JPH0658241B2 - Automatic weighing device such as potatoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an automatic weighing device such as potato for fruits and vegetables having a thin skin.

<Prior art> Generally, potatoes have a very thin epidermis and are easily peeled off. Therefore, as with an automatic weighing device for citrus fruits with a relatively thick epidermis such as mandarin orange, it is installed on the weighing machine installed below the end of the conveyor belt of a certain height. It is not possible to directly drop and fill the weighing items (potatoes) into the empty boxes that have been delivered to, and the semi-automatic filling method is adopted so that there is no filling drop and manual work is involved.

<Problems to be Solved by the Invention> However, in such a semi-automatic filling operation, a large number of workers are naturally required and the weighing and filling capacity is low. As a result, the packing work will be significantly delayed at the slaughterhouse where a large amount of cargo is collected. This poses a problem particularly in the case of small box weighing, such as a 10 kg packing unit which is generally used.

In view of the above situation, the present invention is configured so that the weighing hopper is lowered according to the weight of the weighing object such as potatoes to be carried in and guided to the empty box, so that an automatic weighing device such as potatoes that solves the above problems can be provided. It is intended to be provided.

<Means for Solving the Problems> According to the present invention, a pair of left and right cushioning / supporting springs and a lifting cylinder are provided above a weighing machine for mounting an empty box provided at the tip of an empty box supply path. A weighing hopper suspended and attached to the support frame is provided, and a carry-out belt and a large-scale transport belt are provided at the upper edge of the stretch-type bellows wall at the loading opening provided at one side of the weighing hopper.
The end of the conveyor belt composed of the individual delivery conveyor belt is faced, and the bottom of the weighing hopper is used as a double-sided open bottom plate, and the butt end of the double-sided open bottom plate is connected to a line connecting to a cylinder serving as a bottom opening / closing means. The weighing hopper in the bottom state sinks according to the own weight of the weighing object to be loaded and the transition is made without changing the drop.The lower part of the weighing hopper is exposed to the empty box on the weighing machine, and after the predetermined weighing, the weighing hopper is closed. In the open state, it moves backward upward, and the empty box is filled with a fixed amount of the weighing object.

<Operation> Due to the above-mentioned configuration, the weighing object such as potatoes transferred by the conveyor belt is pulled up to the upper position of the weighing machine, and the slide is placed in the weighing hopper with a bottom that waits with a minimum drop. The weighing hopper itself is carried in through a mold opening, and the weighing hopper itself sinks and shifts in accordance with the weight of the weighing objects sequentially carried in, and the weighing hopper enters into an empty box on the weighing machine which has been fed in advance. In this case, when the quantity to be loaded into the weighing hopper reaches the pre-determined amount (for example, when it is packed in 7.5 to 8 kg in a 10 kg packing box), stop the large delivery conveyor belt that is the main belt, and deliver one delivery Rotate only the belt and carry in a small amount of adjustment to the specified amount. When the weighing hopper reaches the fixed amount at the lower end position, the cylinder type opening / closing means operates to open the bottom plate, and the cylinder type elevating means operates to raise the weighing hopper itself. Objects can be easily moved and filled in the empty box.

<Example> The following will describe the present invention with reference to the accompanying drawings.

Reference numeral 1 denotes a weighing machine provided in front of the empty box supply path portion 20. A weighing machine 1 is supported above the weighing machine 1 by a pair of left and right cushioning / supporting springs 3 and an ascending / descending cylinder 4 serving as an ascending / descending means. The weighing hopper 5 suspended and attached to the frame 6 is arranged, the spread type bellows wall surface 7 is formed in the carrying-in opening 5a provided on one side of the weighing hopper 5, and the empty box supply path portion 20 is provided in front of the opening 5a. The conveyor belt 8 for the weighing object that is parallel to the above is installed. In this case, the conveyor belt 8 is a large-width conveyor belt 8 having a wide width.
It has a two-row construction of the single-piece delivery conveyor belt 8b having a narrow width. Reference numeral 9 denotes a cylinder that is a bottom opening / closing means attached to both sides of the weighing hopper 5. The tip end of a cord 10 connected to a rod 9a of the cylinder 9 is butted to a double door type bottom plate 11 formed at the lower end of the weighing hopper 5. Lock at the end. Further, the operation switches 12a, 12b. 12c is provided for switching operation of the valve 13, and these together serve as an automatic weighing device 14. In addition, the bellows wall surface 7 has a plurality of bellows conditions 7a installed therein, and the opening 5a of the weighing hopper 5 can be used.
This is a structure that slides along the vertical guide groove 15 formed on the side edge of the. Reference numeral 16 is a vertical guide shaft of the spring 3 fixed to the machine frame 17.

Next, this operation will be explained. First, potato A, which is a weighing object.
Is transferred by the rotation of the conveyor belt 8 and drops into the inside from the opening 5a of the weighing hopper 5 which stands by for raising the automatic weighing device 14 arranged in front of it. In this case, the opening 5a of the weighing hopper 5 at the standby position which is the upper side
Is regulated by the chute portion 18 having the front end of the bellows wall surface 7 on the side of the conveyor belt 8 and folded as it rises, the conveyor belt 8 and the bottom plate 11 are close to each other to minimize the head (for example, the maximum head for the start of weighing is , About 220 mm). For this reason, the drop impact on the potato A carried into the weighing hopper 5 is reduced. The potatoes A carried into the weighing hopper 5 immediately start weighing because the weighing hopper 5 is a part of the structure of the weighing machine.

Here, when the potatoes A sequentially flow into the weighing hopper 5, the weighing hopper 5 contracts the spring 3 serving as a suspension support member against the spring pressure in accordance with the weight of the potatoes A, and then sequentially sinks (falls). It is made to face the inside of the empty box B which has been fed out on the weighing machine 1 in advance. However, at this time, the lifting cylinder 4 does not work yet (of course, in this case, the spring 3 has the weight of the weighing hopper 5 and the potato A to be inserted therein).
Use one with a spring pressure that compresses according to the weight).
The supply of the empty box B is below the conveyor belt 8 and the empty box B is fed laterally into the empty box supply path portion 20 from the orthogonal empty box passage 19 position by rotationally pressing the unpacking rack 21. Then, the standby empty box B is placed on the weighing machine 1 positioned in front of the empty box supply path section 20 in association with the protrusion of the empty box B.

Then, when the weighing hopper 5 descends to the intermediate position of the cylinder 4, the auto switch 12c arranged at the intermediate point of the cylinder 4 detects it, and the cylinder 4 is operated accordingly, and the rod 4a is extended to the maximum extent. The weighing hopper 5 is forcibly lowered at once against the increase in the spring pressure of 3. At this time, the clogging amount of the weighing hopper 5 is
The transport belt 8 (large-out transport belt 8a
And 2 pieces of the one-piece delivery conveyor belt 8b), the large-piece delivery belt 8a is stopped and only the one-piece delivery conveyor belt 8b is rotated (for example, if the packing amount is 10 kg, 7.5-8 kg is blocked). Point), and perform small amount packing.

Here, when the weighing hopper 5 reaches the descending end of the cylinder 4 (a position about 5 cm from the bottom of the empty box B) and the inside of the weighing hopper 5 reaches the fixed amount carry-in value, the lowest switch 12b and the weighing switch (not shown). When the operation of (1) is detected, the one-piece delivery belt 8b is stopped, the valve 13 is switched, the cylinder 4 is changed to the pulling operation to raise the weighing hopper 5, and at the same time, the cylinder provided on the side of the weighing hopper 5 9
Works to extend the rod 9a and the rope 10 serving as a hanging string loosens to release the closed bottom lock, and the weighing hopper 5 rises in this state, so the bottom plate 11 of the double door is a kind of bottomed state with the weight of the potato A clogged. Then, the potato A is directly filled into the lower empty box B without observing the fall (minimum impact).

Finally, when the switch 12a at the rising end detects that the weighing hopper 5 has retracted upwards and returned to the standby position, the bottom plate cylinder 9 of the weighing hopper 5 is actuated to pull the rope 10 to the closed bottom, and the weighing machine 1 Also returns to the start of weighing, and at the same time, the unpacking rack 21 works to feed the empty box B from the empty box passage 19 to the empty box supply path portion 20 and is pushed by this empty box B to be placed on the weighing machine 1 by the standby empty box B. Extruding the weighed box of
One box packing process is completed.

In this way, the real box pushed out from the weighing machine 1 is temporarily stopped at the marking device position in the front, and is transferred to the slats after marking (not shown).

<Effects of the Invention> As described above, in the automatic weighing machine such as potato of the present invention, the weighing hopper, which is a part of the weighing machine, stands by up to the vicinity of the conveyor belt position when non-weighing, and sinks and descends when the weighing object is loaded. Since the bottom plate of the weighing hopper is opened and filled by its own weight after retreating after weighing, the distance from the bottom is short when loading the weighing items from the conveyor belt. Unlike the conventional weighing device, it does not flutter, and the weighing hopper itself sinks in accordance with the carried-in amount, so that a minimum impact is constantly required. Also, when filling the empty box, the hopper is raised while the bottom plate is opened and the hopper is rolled by its own weight, so that the hopper is directly replaced by so-called bottom removal, so there is little impact. This makes it ideal for weighing and packaging thin fruits and vegetables such as potatoes, without the risk of peeling the skin and reducing the product value. Moreover, since the present invention has a simple structure in which a movable hopper and a cylinder are combined with each other due to its own weight, it does not cause malfunctions and failures, and the compact is suitable for an automatic weighing device, which in turn reduces the number of workers. It has effects such as connection.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view showing a main part, Fig. 2 is a plan view, Fig. 3 is a perspective view showing the main part, and Fig. 4 is a bellows wall surface of a weighing hopper. FIG. 5, FIG. 6, FIG. 7 and FIG. 7 are perspective views showing the state in which the bottom plate is closed and the movable bottom plate is opened. 1 ... Weighing machine, 3 ... Buffering and supporting spring, 4 ...
Lifting cylinder, 5 …… Weighing hopper, 5a …… Opening,
7 ... Bellows wall surface, 8 ... Transport belt, 8a ... Large-scale transport belt, 8b ... Single-port transport belt, 9 ... Bottom opening / closing cylinder, 10 ... Rope, 11 ... Bottom plate.

Claims (1)

[Claims] 1. A weighing hopper suspended above a weighing machine for mounting an empty box provided at the tip of an empty box supply path, and suspended on a support frame supported by a pair of left and right cushioning and supporting springs and a lifting cylinder. And a conveyor belt end consisting of a large-scale conveyor belt and a single-piece conveyor belt is made to face the upper edge of the stretch-type bellows wall at the carrying-in opening provided on one side of the weighing hopper, and The bottom part of the double door is a double-sided open bottom plate, the butt ends of the double-sided open bottom plate are connected to a cylinder that serves as a bottom opening / closing means, and the bottomed weighing hopper sinks according to the weight of the weighing object to be loaded. It is a transfer that does not change the head, the lower part of the weighing hopper is faced in the empty box on the weighing machine, and after the predetermined weighing, the weighing hopper is retracted upward with the bottomed open, and the empty box is quantitatively filled with the weighing object. A potato that is characterized by Automatic weighing device and the like.