JPH0699953A - Method for confirming seal of bag by staple of filling bag - Google Patents

Abstract

PURPOSE:To make it possible to automatically confirm the sealing of an opening of a bag by means of staples after the opening of the bag filled with dehydrated residue on screen is sealed by means of a stapler. CONSTITUTION:A clamp frame 6 which can be opened and closed like scissors is engaged with the outer sides of a flat folded opening of a bag, the opening of which is folded flatly and which is filled with certain amount of dehydrated residue on screen, and an open/closure action of the frame 6 of a bag sealing device wherein sealing is performed by means of a stapler provided in the frame 6 and a retracting action per pitch corresponding to the width of staple of the frame 6 are repeated alternately so that the frame 6 is moved along the entire length of the opening of the bag to seal it. And by means of the stapler 7 provided in parallel to the frame 6 and a sensor, the quality and presence of staples driven into the flat opening by the stapler 7 in the preceding step is confirmed every time the stapler is actuated to automatically perform the sealing. And the results of confirmation of driving of staples are compared with a predetermined pattern to judge the quality of sealed bag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention pressurizes and dewaters a screen residue collected by scraping it from a waterway such as a sewage treatment plant or a pumping station, and then packing a predetermined amount into a bag and sealing with a stapler. In this case, the present invention relates to a method for automatically confirming whether or not the staple bag is securely sealed.

[0002]

2. Description of the Related Art In a sewage treatment plant, a pump station, etc., solid matter mixed in wastewater is separated from wastewater, and the solid matter and wastewater are treated separately. This solid matter is generally called a screen residue, and since it is scraped and collected from waste water with a dust remover, the water content is extremely high,
In this state, it cannot be dumped, incinerated, or carried out to the dumping position. Therefore, the collected screen residue is dehydrated to the required water content.

[0003]

However, since the processing of the dehydrated screen residue is stored in the hopper and then loaded in bulk on a truck or the like and transported to an incineration site or a dumping place, the truck or the like can be used. During loading and transportation, the dehydrated screen residue is also scattered into the atmosphere and may scatter, or the odor may scatter in all directions, which is also a cause of secondary pollution such as a foul odor. For this reason, it has been proposed in recent years to pack the dehydrated screen residue in a bag and incinerate or fill up the bag. However, in this bag filling method, since the bag mouth is simply flattened and welded, the width at the bag mouth becomes larger than the width of the bag body in the portion filled with the screen residue, and the welded portion If screen residue or the like is caught in the area, it cannot be completely welded and sealed. In order to eliminate this drawback, it is considered that the bag is sealed with a stapler. However, since there are many mistakes when making a bag with a stapler, visual confirmation is performed. It is conceivable that the staple bag is sealed with a proximity sensor. However, small metal pieces such as staples cannot be detected by the known proximity switch.

An object of the present invention is to fill a bag with a fixed amount of dewatering screen residue, seal the bag mouth portion with a stapler, and then automatically check the sealing by staples.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is an outer portion of a flat folding mouth portion of a bag in which a fixed amount of dewatering screen residue is filled and the mouth portion is flatly folded. In a bag sealing device in which a clamp frame that opens and closes like scissors is sandwiched and is sealed with a stapler provided in the clamp frame, the opening and closing operation of the clamp frame and the pitch according to the staple width of the clamp frame are performed. The retracting operation is alternately repeated to move and seal the bag mouth over the entire width, and the stapler and the detection sensor provided in parallel with the clamp frame drive the flat mouth into the flat mouth in the previous stroke. Whether or not the staples are good or bad is checked for each staple operation, and automatically sealed, and the detection of multiple staples is performed by interfering with each other's sensors. ON / OFF operation is performed sequentially with a predetermined time lag under conditions that do not occur, mutual interference between sensors is prevented, accurate detection is performed in a wide range, and whether the staple packaging is good or bad is confirmed. The result,
The gist is that the determination is made by comparison with a predetermined pattern.

[0006]

The stapler is provided on one side of the clamp frame that opens and closes like scissors, and the detection sensor for detecting the staple driven into the flat bag mouth portion by the stapler is provided, and the stapler sealed by the detection sensor is provided. Presence / absence and the pattern of the arranged staples are detected. As a result, the flatly folded bag mouth portion is sandwiched by the clamp frame and simultaneously sealed by the staple. The opening / closing operation of the clamp frame is repeated in the lateral direction of the bag mouth portion by shifting by a predetermined pitch. At this time, the presence or absence of the staples sealed in the previous process and the pattern thereof are detected by a plurality of detection sensors provided at the tip position of the stapler of the clamp frame. In this case, the plurality of detection sensors are arranged close to each other, and the detection ranges thereof are overlapped with each other at their peripheral portions, and the detection sensors are energized with a time lag so as not to interfere with each other. . Therefore, mutual interference between the sensors can be prevented, and even extremely small staples can be detected reliably and in a wide range. Moreover, since the quality of the sealed bag is determined by comparing the result of confirming the driving of the staple with a predetermined pattern, a reliable determination can be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for confirming a sealed bag by stapling a filled bag of the present invention will be described below with reference to the illustrated embodiment. The screen residue scraped up and collected from a waterway such as a sewage treatment plant or a pumping station by a dust remover contains uncrushed materials such as human feces in the screen residue. After crushing and washing, it is supplied to a pressure dehydrator to perform desired pressure dehydration.

Dehydrated screen residue from the hopper,
A predetermined amount is put into the bag B set in the guide G arranged on the turntable T at regular intervals in the circumferential direction. This bag B is longer than the height of the guide G,
It is inserted in the guide so as to be hung in the longitudinal direction of the bag. Then, the sealing device A of the present invention is installed at a fixed position of the turntable T.

This bag-sealing device A clamps the bag mouth portion and moves it up and down, and when the bag mouth portion is clamped, the center folding pinching portion E having a flat center-folded shape is provided in order to reliably perform the clamping. It consists of a clamp part that clamps and confirms with staples while sandwiching the flat opening part.

The clamp portion C is disposed so as to face one outer peripheral portion of the turntable T, and is formed of two slide links 3 and 3 parallel to the bracket 2 of the base 1 in a parallelogram shape in the contacting / separating direction of the turntable. The lower end is pivotally attached, and the slide base 4 is pivotally attached to the upper ends of the slide links 3 and 3, and an encoder 5 is provided on one shaft of the slide link 3 and the slide base 4, so that the slide base 4 is moved forward and backward. To detect. The slide base 4 is provided with clamp frames 6 and 6 that clamp the both sides of the bag mouth portion and perform stapling, such that the clamp frames 6 and 6 can freely open and close like scissors, and the one clamp frame 6 has a stapler 7 and a detection sensor S1. , S2 are provided.

The forward / backward swing of the slide base 4 with respect to the turntable is performed by a slide cylinder 8 provided between the base 1 and one slide link 3, but a motor type may be used instead of this cylinder. The base ends of the clamp frames 6 and 6 are pivotally supported by pivots 9 and 9 in such a manner that their front ends can swing toward and away from each other, that is, they can swing and open and close like scissors, and a gear fixed to the pivots 9 and 9. 10,
10 are engaged with each other, and a clamp cylinder 12 is attached between the links 11 and 11 projecting from the pivots 9 and 9. By operating this cylinder 12, both clamp frames 6 facing each other via the pulleys 10 and 10. 6 are synchronously moved toward and away from each other, that is, opening and closing operations are performed. A stapler 7 and detection sensors S1 and S2 are attached to the clamp frame 6 on one side, and the detection sensors S1 and S2 are attached to the tip side of the stapler 7, and a flat center-folded quadruple bag mouth portion is sealed with a staple and the sealing is performed. Stop detection.

Therefore, the bag mouth is sealed by advancing the clamp base and intermittently retreating at every pitch and by opening and closing the clamp frame 6 to open the bag mouth and close the advanced clamp frame. Is performed by the stapler 7.

The forward movement of the clamp base is made to reach the front end of the flattened bag mouth portion, and thereafter, each time when the staple is sealed, one slide width is set to one pitch and the slide base is moved back every one pitch. At the same time, the slide table is retracted by one pitch and the clamp frame is opened and closed alternately to seal from one end of the bag mouth to the other end, that is, the entire width of the bag mouth. In this case, the staples sealed in the preceding step by retracting the clamp table by one pitch each time the clamp frame is opened / closed detect the detection sensor S1 attached to the tip of the clamp frame.
As detected in S2, the stapler and the detection sensor are attached while maintaining a relative relationship.

Further, as the detection sensors S1 and S2, commercially available proximity switches Sa, Sa ... Are adopted, but a plurality of proximity switches Sa, Sa ... Are arranged in proximity to each other, and they are arranged within a predetermined range or irregularly. As shown in FIG. 10, the detection ranges of the adjacent proximity switches Sa are arranged so as to be overlapped with each other so as to form one detection sensor S1 or S2.
As a result, even a very small staple can be detected by one of the proximity switches of the group of sensors S1 and S2. This is because each adjacent switch Sa is set to 0.1 sec so that a plurality of switches that are close to each other do not interfere with each other.
Electrical connection is made so that short-time energization of about a certain amount is sequentially turned on and off with a time lag. This one method is shown in FIG. In FIG. 11, black circles indicate proximity switches that are energized, and white circles indicate proximity switches that are not energized. This prevents mutual interference between sensors even if they are arranged so that they are close to each other and overlap each other in the detection area, and accurate detection of small pieces such as staples over a wide range. Is possible.

The detection sensors S1 and S2 in the illustrated embodiment have two staplers arranged in parallel.
Although two staples which are parallel to each other in the width direction of the bag mouth portion sealed by each stapler can be detected at the same time, one stapler attached to the clamp frame is used.
In the case of a table, the detection sensor may be one group.

In order to detect whether or not the bag is sealed by the staple, the result of confirming the driving of the staple detected by the detection sensors S1 and S2 formed by adjoining the plurality of proximity switches is set in advance. The pattern is compared with the existing pattern, and the quality of the sealed bag is determined by this. By doing so, reliable confirmation of the sealed bag can be easily performed.

For example, when twelve staples are punched into one bag for sealing, a mistake in the driving of staples occurs with a small probability due to deposits of dust inside the mouth of the bag and concentration of wrinkles in the bag. If even one of the twelve staples has a hitting mistake, it is determined to be a bag-filling mistake. If this is regarded as a bag-filling mistake, the probability of a staple striking error multiplied by 12 will be the bag-filling miss probability, and the probability of bag-filling error will be high, and the number of times the entire system will be stopped will also increase. .

However, in the case where 12 staples are used for the bag-sealing, as long as the staples do not continue, even if the staples of 2 to 3 are improperly driven, the bag-sealing will not be hindered. in this case,
A good pattern is defined in advance, such that up to 3 out of 12 staples have a driving error, and good except for mistakes at the same position on the top and bottom, and this pattern and the detection sensor S.
If it is judged whether the bag is good or bad by comparing the driving confirmation results detected in 1 and S2, the probability of a bag mistake will decrease, the number of system stoppages will decrease, and the operating efficiency of the system will improve. Become.

In this case, the pattern serving as a quality judgment standard is determined appropriately so that it does not substantially cause a problem in the bag.

Before sealing the bag mouth portion, a certain amount of dehydrated screen residue is put into the bag, and then the bag mouth portion is clamped to move the bag up and down one or more times to move the screen up and down. The filling operation for densely filling the residue and the center folding operation for flatly folding the bag mouth portion are performed. In this, the rod of the lifter cylinder 13 provided under the main body frame is locked to the elevating frame 14, and the elevating frame 14 is attached to the fixed frame 15 via the link 16 for confirming the sealing of the screen dust filling bag. The lifting frame 14 is provided with a holding portion D and a center folding portion E.

The holding portion D suspends and supports a hanging frame 17 on the elevating frame 14, and the pair of parallel links 18 and 19 facing each side of the hanging frame 17 are swingable. Pivot to. This left parallel link 1
Bearings 18a, 19 are provided on the right and left parallel links 19 and 19 of the suspension frame 17 so as to face each other from the center of the suspension frame 17 so as to face each other.
It is supported by a suspension frame via a, and a connecting rod 20 is installed between the left and right parallel links 18 and 19 so that the left and right parallel links 18 and 19 can swing in perfect synchronization.

The bracket 21 of the suspension frame 17
The tip of the rod 22a of the sandwiching cylinder 22 supported by the part of the connecting rod 20 or the spindle 1 of the parallel link 19
9b, whereby the left and right parallel links 18 and 19 facing left and right via the connecting rod 20 by the operation of one cylinder 22 swing in synchronization with each other, that is, the left and right parallel links 18, 19 Clamping device 2 pivotally attached to the lower end
3, 24 are swung in the contact and separation directions.

The sandwiching claw devices 23, 24 are bilaterally symmetrical. The gripping claw device has a shaft 23b on the upper part of the claw frame 23a,
The lower ends of the left parallel links 18, 18 are pivotally attached via 23b, and a fixed claw 23c is provided on the lower surface of the claw frame 23a so as to project in a substantially vertical direction. The fixed claw 23c is opposed to the movable claw 23d. It is arranged, with respect to the claw frame 23a,
The movable claw 23d is swung via the support shaft 23e, that is, the fixed claw 23c is opened and closed like scissors, and the rod of the claw opening / closing cylinder 23f supported by the claw frame 23a is provided as a part of the movable claw 23d. Hang up.

The center folding section E is a holding claw device 23 for opening and closing.
The guide rod 26 is provided in the center folding frame 25 provided in the hanging frame 17 that is vertically installed on the elevating frame 15 at a position orthogonal to the direction 24 and at an intermediate position between the two holding claw devices 23 and 24.
Is horizontally installed, the two moving frames 27, 27 are swingably supported by the guide rod 26, and the center folding claw 28 is vertically provided on the lower surface of each moving frame 27, and the center of the middle is provided above the moving frame. Center folding cylinder 2 provided in the folding frame 25
Lock the rod of 9. At this time, two moving frames 2
Reference numerals 7 and 27 denote one center-folding cylinder 29, 29 provided in each moving frame so as to be slidable by being guided by the guide rod 26 toward and away from each other. , 28 are provided so as to project slightly below the lower ends of the fixed and movable claws 23c, 23d and 24c, 24d of the sandwiching claw devices 23, 24.

[0025]

According to the present invention, the stapler and the detection sensor are arranged in a relative relationship on at least one of the clamp frames which are opposed to each other like scissors, and which are opened and closed. By the combination of the opening / closing operation and the retreating operation of the clamp table for each pitch, it is possible to simultaneously perform the sealing work by the staple over the entire width of the bag mouth portion and at the same time check the quality of the sealed staple in the previous step. Further, a plurality of proximity switches arranged close to each other are arranged so that their detection ranges overlap each other little by little, and the proximity switches have a predetermined time lag so as not to interfere with each other.
Since the power is energized N or OFF, it is possible to reliably detect a small object such as a staple that is difficult to detect in a wide range. In addition, since the quality of the sealed bag is determined by comparing the staple driving check result with a predetermined pattern, the probability of the bag-sealing error is reduced and the productivity is improved. And so on.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a screen residue bag sealing device of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of a clamp part.

FIG. 5 is a side view of the same.

FIG. 6 is a front view of the advancing / retreating device of the clamp base.

FIG. 7 is a side view of the same.

FIG. 8 is a front view of a clamp part.

FIG. 9 is an explanatory diagram showing a method for inspecting a driven staple.

FIG. 10 is an explanatory diagram showing a detection range for each proximity switch.

FIG. 11 is an explanatory diagram showing an order in which each proximity switch is energized and detected with a time lag.

FIG. 12 is a front view of a center folding section.

[Explanation of symbols] T Turntable B Bag A Sealing device C Clamping part D Clamping part E Middle folding part 1 Base 3 Slide link 4 Sliding table 6 Clamp frame 7 Stapler 8 Sliding cylinder 12 Clamping cylinder 13 Lifter cylinder 14 Lifting frame 17 Suspended Frame 18, 19 Parallel Link 23, 24 Clamping Claw Device 25 Center Folding Frame 28 Center Folding Claw 29 Center Folding Cylinder

Claims (3)

[Claims] 1. A clamp frame, which is filled with a fixed amount of dewatering screen residue and is opened and closed like a scissor, is sandwiched between outer sides of a flat folding mouth of a bag whose mouth is flatly folded, and a stapler provided on the clamp frame is attached. In the bag sealing device for sealing by means of opening and closing, the clamp frame is opened and closed, and the retracting operation is carried out alternately at every pitch according to the staple width of the clamp frame to move and seal over the entire width of the bag mouth. At the same time, the stapler and detection sensor provided in parallel with the clamp frame confirm the quality of the staples that have been driven into the flattened mouth portion in the preceding stroke by this stapler at each staple operation and automatically seal. A method for checking a sealed bag by stapling a filled bag, which is characterized in that 2. When a stapler arranged in parallel with a clamp frame is used as a detection sensor to detect staples driven into the flat mouth in the preceding stroke by this stapler, a plurality of sensors arranged adjacent to each other are The detection range is overlapped with each other in its peripheral part, and each sensor is turned on and off sequentially with a predetermined time lag under the condition that each sensor does not cause mutual interference.
However, a method for checking the sealed bag by stapling the filling bag is characterized by preventing mutual interference between the sensors and detecting accurately in a wide range. 3. The quality of the sealed bag is judged by comparing the result of confirming the driving of the staple of the bag sealed with the staple with a predetermined pattern. Checking the sealed bag by stapling the filling bag of.