JPH058266Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement in the positioning mechanism of a lifting platform in a bulk depalletizer.

(Prior art) For example, when glass bottles manufactured by a glass bottle maker are transported to a pharmaceutical manufacturer, etc., a large number of glass bottles are arranged in a fixed number and stacked in several tiers via a mount. They are stacked to form a bulky package called a bulk. This bulk package is unpacked at a filling manufacturer, which is a user, and is supplied to a predetermined conveyor. A device for unwrapping this bulk is generally called a bulk depalletizer or bulk uncaser.

This invention relates to a mechanism in the bulk departizer for positioning the bulk stacked in several stages to a predetermined decomposition height position by means of a lifting platform for each stage.

As a positioning mechanism for the lifting platform in this type of bulk depalletizer, for example,
As shown in the figure, a limit switch is provided at a predetermined height position on the side of the platform of the lifting platform, and the arm of the switch comes into contact with the mount placed on the top of each bulk stage that is ascending in sequence. It was common for the platform to operate and stop the platform.

However, as shown in FIG. 6 of the accompanying drawings, the arm-type limit switch 75 or the phototube switch 76 as an alternative mechanism for the arm type limit switch 75 does not touch a part of the mount from the side of the mount or is exposed to light. This is what we are trying to detect. However, although the mount is made of a hard material, it not only has a large surface area relative to its thickness, but also is not necessarily horizontal due to the load of the product and the packaging style, and may be wavy. Alternatively, it is normal for the mount 15 to have warps 15A and sag 15B, especially at its peripheral edge. In addition, when it comes to items such as the glass bottle 16, there are slight variations in the height of each item, and it is difficult to detect the decomposition height from the side of the mount 15 using the arm-type limit switch 75 or the phototube switch 76. Extremely inaccurate, in fact
When transporting goods, a difference in level often occurs, causing inconveniences such as overturning or falling.

(Problems to be solved by the invention) This invention was proposed in view of the above situation, and its purpose is to provide a mechanism that can detect the disassembly position more accurately. .

Naturally, another purpose of this invention is to provide a simple and inexpensive mechanism for the device.

(Means for solving the problem) In other words, this invention moves a bulk product made up of a large number of articles stacked in several tiers via a mount to a predetermined disassembly height position for each tier by means of a lifting platform. In a bulk depalletizer, the products in each tier are sent out of the machine after the mounts placed on the top surfaces of the products in each tier are sequentially positioned and the mounts placed on the top surfaces of the products in each tier are removed to the outside of the machine by a mount removing device. The removal device has a plurality of suction cups that move up and down above the bulk by an elevating cylinder and abuts against the mount surface of the bulk, and the elevating cylinder has a switch that defines a predetermined decomposition height position of the bulk. A bulk depalletizer characterized in that the switch is actuated by the expansion and contraction of the rod, and the lifting platform is stopped at a predetermined disassembly height position by a signal from the switch. This relates to the positioning mechanism of the lifting platform.

(Function) The bulk depalletizer is provided with a mount removing device for removing the top surface of the bulk and the mounts interposed in each stage. This device usually has a plurality of suction cups that abut against the surface of the bulk paper.

In this invented mechanism, a predetermined disassembly height position in the bulk is detected using the elevating cylinder of the mount removing device having a plurality of suction cups. Since the suction cup contacts the plane of the mount at multiple positions, it is useful for more accurate height position detection regardless of the plane state of the mount.

Then, a predetermined decomposition height position of the bulk is detected by a switch disposed on the elevating cylinder, and the operation of the elevating table is stopped in response to this signal.

(Example) An example of this invention will be described below with reference to the attached drawings.

Figure 1 of the attached drawings is a schematic side view of the entire bulk depalletizer showing an example of this invented mechanism, Figure 2 is a schematic side view of the liner removing device, and Figure 3 is the lifting cylinder of the liner removing device being pushed up. Fig. 4 is a side view of the main part showing the state in which the lifting cylinder is fixed, Fig. 5 is a hydraulic circuit diagram for stopping the lifting platform in response to a stop signal from the lifting cylinder; FIG. 6 is a schematic side view showing a conventional positioning mechanism.

The bulk depalletizer shown in FIG. 1 includes a bulk lifting platform 20 that can sequentially raise the bulks 10 and 11 sent from the pallet conveyor 60 to a predetermined decomposition height position D, step by step.
The top surface of the bulk 10 and the mount 1 interposed in each stage
5, 15... in order to remove the bulk lifting platform 2.
After receiving the disassembled bottle 16 at the disassembly height position D, the mount removing device 30 installed above the disassembled height position
It is composed of a delivery device 50 for sending the products to the delivery facility.

The delivery device 50 is configured to be movable up and down so that the delivery position P can be arbitrarily selected so as to easily respond to variations in the height position of the delivery conveyor 70 on the user side.

Further, reference numeral 55 is a known feeding device (pusher) for feeding the bottles 16 of each stage of the bulk 10 to the table 51 of the delivery device 50 at the bulk disassembly height position D, and 56 is a feeding position. This is a known delivery device (pusher) provided in the delivery device 50 in order to send the bottles 16 to the delivery conveyor 70 at P.

FIG. 2 is a diagram schematically showing the backing paper removing device 30. The main body of the backing paper removing device 30 is equipped with a lifting cylinder 31, which is equipped with a plurality of (usually four) suction cups 35, 35 that stick to the surface of the backing paper. The suction cup 35 is moved up and down above the back by air, and after the suction cup 35 is attracted to the mount surface by air, the mount is conveyed and removed to a predetermined position outside the machine by a feeding device consisting of a rail and a chain (not shown). be. Reference numeral 32 indicates a cylinder rod of the lifting cylinder, and 33 indicates a suction cup mounting plate.

As mentioned above, this invented structure detects a predetermined disassembly height position in the bulk using the lifting cylinder 31 of the mount removing device 30 having the plurality of suction cups 35, 35.
Next, a detailed explanation will be given with reference to FIGS. 3 and 4.

First, the bulk 10 on the lifting platform 20 is lifted up from below in each stage and positioned at the disassembly height position D, but the lifting cylinder 31 of the mount removing device 30 is initially lowered downward in a free state. ing. As shown by the chain line and solid line in FIG. 3, when the bulk 10 rises as the lifting table 20 rises, the suction cup 35 comes into contact with the mount 15 located at the top, causing the mount removal device to move up and down. The cylinder rod 32 of the cylinder 31 is pushed up.

The lift cylinder 31 of the liner removing device 30 is provided with a reed switch 4 for industrial use, which defines a predetermined disassembly height position D of the bulk, and the switch 40 is actuated by the expansion and contraction of the cylinder rod. It is configured.

Then, as shown by the solid line in FIG. 4, when the cylinder rod 32 rises to a predetermined position, the reed switch 40 is activated. As shown in Figure 5,
The reed switch 40 is connected to the changeover switch 25 of the hydraulic lifting device 21 of the lifting platform 20, and the lifting of the lifting platform 20 is stopped by a signal from the reed switch 40, and the bulk 10 is placed at a predetermined disassembly height position D. Positioned.

In the figure, reference numeral 41 is a height detection switch for the low bottle, and 49 is an upper limit height switch for the cylinder.

(Effects) As can be easily understood from the above explanation, in this invented mechanism, the plurality of suction cups of the mount removing device abut on the mount plane at multiple positions, so that the mount can be removed even more regardless of the plane state of the mount. Accurate height position detection becomes possible. As mentioned before, the surface of this kind of bulk mount itself is not necessarily a uniform horizontal surface, and there are also errors in the height of the bulk product, and even more so in the bottom plate (pallet) of the bulk, It is extremely difficult to accurately detect the height position by detecting the height from a single point from the side.

In this devised mechanism, multiple suction cups are brought into contact with the mount from above, and the lifting force of the cylinder is used to detect the predetermined disassembly height position. The error between the height position at which the article is sent out and the detected height position at which it is disassembled is extremely small. Therefore, compared to conventional devices which have large errors, troubles such as overturning and falling of articles can be greatly reduced.

In addition, this devised mechanism has extremely great practical advantages, such as simply installing a switch on the cylinder of the liner removing device attached to the bulk depalletizer, which is mechanically simple and economical. It is something that you have.

[Brief explanation of the drawing]

Figure 1 is a schematic side view of the entire bulk depalletizer showing an example of this devised mechanism, Figure 2 is a schematic side view of the liner removing device, and Figure 3 is a state in which the lifting cylinder of the liner removing device is being pushed up. Fig. 4 is a side view of the main part showing the positioning state by the elevating cylinder, Fig. 5 is a hydraulic circuit diagram for stopping the elevating platform by the stop signal of the elevating cylinder, and Fig. 6 is a side view of the main part. The figure is a schematic side view showing a conventional positioning mechanism. 10, 11... Bulk, 15... Mount, 16...
...Bottle body, 20... Lifting table, 30... Lining removal device, 31... Elevating cylinder, 32... Cylinder rod, 35... Suction cup, 40... Reed switch, 50... Delivery device, D... Decomposition height position.

Claims (1)

[Claims for Utility Model Registration] A mount removal device that sequentially positions each tier of a bulk product made up of a large number of articles stacked in several tiers via a mount at a predetermined disassembly height position using an elevating platform. In the bulk depalletizer, the mount paper placed on the top surface of the articles in each tier is removed to the outside of the machine by a holder, and then the mount paper placed on the top surface of the articles in each tier is sent out of the machine. It has a plurality of suction cups that move up and down above the bulk and comes into contact with the mount surface of the bulk, and the lifting cylinder is provided with a switch that defines a predetermined disassembly height position of the bulk, and the rod 1. A positioning mechanism for a lifting platform in a bulk depalletizer, characterized in that the switch is actuated by expansion and contraction of the switch, and a signal from the switch causes the lifting platform to be stopped at a predetermined disassembly height position.