JPH0451131Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for positioning fed bags used in an automatic bag feeding device.

(Prior Art) Conventionally, automatic focusing devices used to fill a predetermined amount of powder or granular material into a predetermined bag are as follows.
Various methods have been used and proposed. These are bag unloading devices that take out a folded rectangular bag with a valve part for filling powder on one side one by one from the bag loading area, and feed the taken out bags to a predetermined filling position. A bag positioning device that accurately positions and stops the bag at a position where the valve part 2a of the bag is opened during the delivery, and a bag positioning device that opens the valve part of the bag in this bag positioning device and then releases the powder. It consists of a combination of a setting device that transports and sets the bag to a granular filling position, and a filling device that fills the set bag with a predetermined amount of granular material.

It goes without saying that each of these devices should be conveniently configured both individually and in mutually related combinations in order to perform automatic filling efficiently and smoothly. The process of opening the valve part of the bag and accurately setting the bag in a predetermined position facing the filling device is a process that prevents errors in bag placement and leakage of powder and granules from the bag during filling. It is an important device.

Based on this viewpoint, the present applicant
No. 123321 has already proposed a new automatic bag feeding device.

In this proposal, the corner bottom part of the bag with a valve part is folded into a flange shape for blowing powder into the bag, and this bag is further folded along one side of the bag. The following configuration is adopted to set the powder in a predetermined posture and state at the powder filling position.

That is, while the bag is being fed in a flat state, the square bottom part with the valve part is made to stand up in a T-shape with respect to the bag body by blowing air, and is stopped at the bag positioning position. The flange-shaped corner bottom of the container is made into a diamond-shaped cross section using a suction cup, and the diamond-shaped corner bottom is held between a pair of angle-shaped clamping rods and transported to the filling position.

In a mechanism that uses such a clamping rod to transport bags, it is necessary to always keep the clamping rod and the bag in a fixed positional relationship, especially at the corner bottom. It is necessary to keep it in position.

(Problems to be Solved) However, the proposed device does not have an appropriate positioning mechanism, and air blowing is used to raise the corner bottom of the bag, which is fed in a flat state, into a T-shape. . But generally paper bags are 500-100
Because the sheets are bundled together and handled as a unit, and because the bags are pasted together in multiple layers,
If the so-called stiffness is strong or if the bag is warped, the bottom of the corner may not be able to stand up reliably.

The present invention is an automatic bag feeding device related to the above-mentioned proposal, and in particular, it is possible to accurately and efficiently perform the operation of setting distributed bags in a predetermined posture and state with respect to a filling device. In particular, it is used to mechanically engage the corner bottom of a bag that is being fed in a flat state with a transfer guide wall, etc., for positioning purposes to maintain a constant position relative to the filling nozzle. An object of the present invention is to provide a bag positioning device that can reliably stand up a bag in a T-shape depending on the situation.

Another object of the present invention is to make it possible to improve the transport speed of bags.

(Means for Solving the Problems) The bag positioning device used in the automatic bag feeding device according to the present invention, which was developed to achieve the above object, is characterized by folding the corner bottom portion provided with the suction valve portion. A bag that has been folded into a flange shape and folded along one side of the bag body is dropped with the bottom of the corner facing upward, and at the lower falling position, this corner A bag positioning device that is supported by standing upright at right angles so that the bottom part is in a substantially horizontal direction, and the bag positioning device contacts the falling bag from both sides in the thickness direction to determine the attitude and position of the bag during the fall. an upper bag falling passage formed by an upper fixed guide member; and a lower fixed guide member positioned below to be able to receive bags falling from the upper bag falling passage, and located on one side in the thickness direction of the falling bag. , and a lower bag drop passage formed by a lower movable guide member provided movably between an approaching position and a separating position on the opposite side of the bag with respect to the lower fixed guide member, and the lower movable guide member, and opening the passage. a movable means for accepting a falling bag and moving it to an approach position where the passage is narrowed; and at least one of the lower fixed guide member and the lower movable guide member, the movable means is provided on at least one of the lower fixed guide member and the lower movable guide member, a moving force applying means for applying a downward moving force to the bag, and an edge supporting the raised corner bottom of the bag is provided at the upper end of each of the lower fixed guide member and the lower movable guide member. are provided extending substantially perpendicularly to both outside sides, and furthermore, this lower bag dropping passage is provided so as to be offset to one side of the bag where the flange-shaped corner bottom portion is folded with respect to the upper bag dropping passage. It's where you are.

(Function) According to the positioning device of the present invention, since the lower bag drop passage is provided offset from the upper bag drop passage, the bag that is dropped with the corner bottom portion having the valve portion facing up is placed in the upper bag drop passage. When moving from the bag drop passage to the lower bag drop passage, the corner bottom side is forced to bend and deform, so that the corner bottom is reliably erected into a T-shape.

(Example) The present invention will be described below based on an example shown in the drawings.

1 to 4 are for explaining the general configuration of a powder filling device to which the bag positioning device of the present invention is applied. The bag 1, which has been dropped and fed by the positioning device 30 (see FIG. 2), is held at the upper corner bottom portion 2 by the holding mechanism 21 of the setting device 20, which will be described later.
The state in which the valve portion 2a is opened (see Fig. 3)
After that, it is moved by the setting device 20 and placed on the weighing platform 5 at the filling position where the opened valve portion 2a is inserted into the blowing pipe 4 of the filling device 3 (see Fig. 1). .

3 and 4 show a setting device 20 including a holding mechanism 21 that holds the valve portion 2a open for the square bottom portion 2 of the bag 1 supported in a predetermined position and posture by the positioning device 30. This holding mechanism 21 is a suction cup that suctions the upper surface of the valve part 2a of the square bottom part 2 of the bag supported in a predetermined position and posture on the positioning device to open the bag upright. The valve part 2a has a rod 25, a pair of arms 23 that are opened and closed by a cylinder 22, and an angular clamping rod 24 provided at the tips of these arms, and is raised and opened by the suction rod 25. is held by the closing action of the arm 23, and the opened valve portion is inserted and set into the blowing pipe 4 of the filling device 3.

The above configuration is generally the same as that described in Japanese Patent Application Laid-open No. 123321/1988.

Next, the bag positioning device, which is a characteristic part of this embodiment, will be explained below with reference to FIGS. 5 and 6.

The positioning device 30 of this example includes the distribution guide 1
Fixed guide members 31 on both sides of the upper part for guiding the bag 1 dropped and supplied from 2 downward in a predetermined posture;
an upper guide part (upper bag falling passage) consisting of 32;
A lower support section that supports the square bottom part 2 of the bag 1 that falls from between the fixed guide members 31 and 32 on both sides of the upper part in a state where it stands up at right angles (T-shape) to the main body of the bag 1. This lower support part consists of
One side fixed guide member 3 located on one side of the falling bag
3 and the other side movable guide member 34 which is opposed to this and whose upper end rotates around the pivot pin 35 to form a narrow bag drop passage 38 (lower bag drop passage). ing.

One of the fixed guide members on both sides of the upper guide part of the upper guide part has a flat plate shape, and the other 3 has a plate shape.
2, a bent wire rod is provided integrally with the fixed guide member 33 on one side of the lower support part, and these are opened upward and form an inclined state with a narrow opening at the lower end. It is designed to regulate the attitude and position of the falling bag.

Also, the other side movable guide member 34 of the lower support part
The one side fixed guide member 33 is driven by the cylinder device 36 connected by the hinge 36a.
The movable guide member 34 on the other side faces the bag drop passage 38 and is rotated by a drive mechanism (not shown). A rotary drive roller is assembled to apply a downward moving force to the bag 1 passing through the bag drop passage 38. Note that, of course, this rotary drive roller may be assembled to a fixed guide portion.

Upper edges 33a and 34a are formed at the upper ends of the fixed guide member 33 on one side and the movable guide member 34 on the other side, which constitute these lower support parts, and extend outwardly at right angles to the bag drop passage 38. As shown in FIG. 6B, the bag falling passage 38 is formed by folding the corner bottom part 2 of the bag 1 against the lower corner parts 31a and 32a, which provide a narrow passage at the lower end of the upper guide part. It is provided so as to be biased by a length l toward the side that is facing (the left side in FIG. 6).

To describe the operation of the bag positioning device having the above configuration, when the bag 1 with the square bottom portion 2 folded toward the fixed guide member 32 side (the left side in FIG. 6) is dropped from the distribution guide 12, The bag 1 is guided downward along the fixed guide members 31 and 32 on both sides (see FIG. 6A), and in this state, the lower movable guide member 3
4 is closed by the cylinder 36 (see FIG. 6B). In this state, the lower part of the bag 1 in the bag drop passage 38 is moved downward by the rotation of the rotary drive roller 37, and also between the bag drop passage 38 and the lower corner 32a of the fixed guide member 32. The deflection of the length l described above causes a slight bend upward (see FIG. 6b).

When the bag is further dropped, the restoring force of the bag causes the bag to gradually return to its flat state as it enters the bag drop passage 38, and at this time, the upper corner bottom 2 is connected to the lower corner of the fixed guide member 32. 32a (see FIG. 6C), and while maintaining this upright state, the corner bottom portion 2 engages with the lower support edges 33a and 34a (see FIG. 6D). The lower corner portion 32a and lower support carvings 33a, 34a
The gap is selected to have an appropriate length to allow the corner bottom 2 to stand up as shown.

After the valve portion 2a is positioned in the state shown in FIG. 6D as described above, the valve portion 2a is opened and inserted into the filling device blowing pipe according to the set position shown in FIGS. 2 to 4. It can be done.

According to this example, due to the elasticity of the bag itself, the mechanical engagement state with each guide member changes (contact transition), so that the corner bottom can be reliably and accurately raised and held, and the next There is the advantage that the subsequent set state is carried out smoothly.

7 to 9 show another embodiment of the present invention, in which the upper both-side fixed guide members 131, 132 are formed by a pair of rod-shaped members spaced apart in the width direction of the bag 1. However, the bag drop passage 138 is opened and closed by sliding the movable guide member 133 with respect to the lower fixed guide member 134 using an air cylinder device 136.

Further, the corner portion for raising the corner bottom portion of the bag 1 is formed by a bent rod-like member 133' fixed to the upper end of the movable guide member 133 in this example.

In this example, the bag 1 is raised, positioned, and held in a T-shaped posture in the same manner as in the case of FIG. 6 (see FIG. 8 A, B, C, and D).
Note that 137 is a drive roller that promotes the movement of the bag 1 incorporated in the movable guide member 133.

Furthermore, in this example, the device for transferring and setting the positioned bag 1 to the filling device includes a pair of inward L-shaped arms 123, 123, as shown in FIG.
By opening and closing the support rods 124, 124 at the tips of the arms, the square bottom 2 of the bag is held and the bag is moved in this held state.

In this example as well, the same effects as in the above embodiment can be obtained.

It goes without saying that the present invention is not limited to the embodiments described above, and that various modified embodiments that satisfy the gist thereof can be considered.

(Effects of the invention) According to the invention, in the feeding and distributing of bags for automatic filling of powder and granular materials, it is possible to make the square bottoms of the bags fed in a flat state stand up in a T-shape. This has the effect of ensuring that the bag can be placed in the filling device nozzle by opening the valve part of the square bottom, and the connection when setting the bag in the nozzle of the filling device is reduced. This has extremely great practical effects, such as making it possible to increase the speed of feeding and distributing bags.

Moreover, compared to the conventionally proposed method of blowing air to raise the corner bottom, there is an advantage that an air source is not required, and a device for timing the air blowing is not required.

[Brief explanation of the drawing]

The drawings are for explaining an example of the general configuration of the embodiment of the present invention, and FIG. , Figure 3 is a diagram showing the relationship between the bag positioning device, setting device, and filling device, Figure 3 is a diagram showing the holding mechanism of the setting device, and Figures 4 A and 4 are diagrams showing the valve part at the end of the flange opened by the holding mechanism. 5 is a perspective view showing an example of the bag positioning device according to the present invention, and FIGS. 6A to 6D are views sequentially showing the operating states of the bag positioning device. Figures 7 to 9 show other examples of the present invention, with Figure 7 being a partial perspective view of the bag positioning device, and Figures 8 A, B, C, and D showing the bag positioning device. Figures 9A, 9B and 9C, which sequentially show the operating states, are diagrams for explaining the operation of setting the bag into the filling device. DESCRIPTION OF SYMBOLS 1... Bag, 2... Flange end, 2a... Valve part, 3... Filling device, 4... Blowing pipe, 5... Weighing stand, 10... Dispensing conveyor, 11... Feeding conveyor , 12...Distribution guide, 20...Set device,
21... Holding mechanism, 22... Cylinder, 23...
Arm, 24... Holding rod, 25... Suction cup, 30...
...Bag positioning device, 31...Fixed guide members (plates) on both sides of the upper part, 32...Fixed guide members (bending line members) on both sides of the upper part, 31a, 32a...Lower corner part,
33... Fixed guide member on one side, 34... Fixed guide member on the other side, 33a, 34a... Support edge, 35... Rotation fulcrum, 36... Swinging air cylinder, 36a...
... Hinge, 37 ... Drive roller, 38 ... Bag falling passage, 123 ... Arm, 124 ... Support rod, 1
25... Suction cup, 131, 132... Fixed guide member, 133, 133'... One side fixed guide member, 1
34...Other side movable guide member, 136...Air cylinder device, 137...Drive roller, 138...Bag dropping passage.

Claims (1)

[Scope of Claim for Utility Model Registration] A bag having a corner bottom provided with a blowing valve part folded into a flange shape and folded along one side of the bag body, with the corner bottom facing upward. The bag positioning device is configured to allow the bag to fall in a position where the bag is dropped, and to support the bag by standing it upright at a right angle so that the corner bottom is approximately horizontal to the bag body at the lower dropping position. an upper bag fall passage formed by upper fixed guide members on both sides that determine the posture and position of the bag during the fall by contacting the bag from both sides in the thickness direction;
A lower fixed guide member positioned below to be able to receive bags falling from the upper bag falling passage and located on one side in the thickness direction of the falling bag, and a lower fixed guide member that approaches the lower fixed guide member on the opposite side of the bag. A lower bag falling passage formed by a lower movable guide member provided movably between positions and separated positions, and the lower movable guide member is moved to an approach position where the passage is narrowed after opening the passage and receiving the falling bag. a movable means for moving;
A moving force acting means is provided on at least one of the lower fixed guide member or the lower movable guide member and applies a downward moving force to the bag falling in the lower bag falling passage, At the upper end of each of the lower fixed guide member and the lower movable guide member, an edge for supporting the upright corner bottom of the bag is provided extending substantially perpendicularly to both outer sides, and the lower bag falling passage is provided with A bag positioning device for use in an automatic bag feeding device, characterized in that the flange-shaped corner bottom portion is provided offset to one side of the folded bag with respect to the upper bag drop passage.