JPS60148416A - Automatic mounting device for bag of sacking packer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention is a bag for storing and packaging cargo, for example, four toilet paver in two, three, four, etc. stages, with a mouth widened into a packet through which the cargo is pushed. This invention relates to an automatic bag mounting device for a bag filling and packaging machine.

Such a mounting device is known from Japanese Patent Publication No. 55-20939. This includes first and second moving members each having a suction part and being reciprocated, and moving the first moving member to the second moving member.
The upper surface of the top bag of the bags stacked on the bag storage section is moved backward from the moving member, and the suction section of the first moving member attracts the top surface of the bag.
Next, the first moving member is moved forward, and during its forward movement, the bottom surface of the bag is sucked by the suction part of the second moving member, and from there, the second moving member is moved forward together with the first moving member, and the cam is applied from the force. Swing the self-moving member to open the bag and place it over the packet.

When the bag is attached to the packet, the self-moving member retreats halfway along with the bag, and even if the second moving member stops there, the first moving member
The moving member further retreats, and the second moving member waits until the first moving member adsorbs the mouth of the next bag and moves halfway forward.

In this way, in the conventional device, the reciprocating strokes of the first moving member and the second moving member are different, so it is necessary to reciprocate the self-moving members separately, and synchronize with the first moving member in the middle of its forward movement. A timing device for starting the forward movement of the second moving member and a cam for causing the self-moving member to open the bag are also required, making the device complex. Furthermore, while the first moving member adsorbs the top surface of the bag and moves forward to the point where the second moving member is waiting, the bottom surface of the bag sags, causing problems such as being caught in the machine and being damaged.

Therefore, in the present invention, the other ends of two arms having suction portions facing each other at their tips are pivotally connected to a slider that is reciprocally driven, and both arms are reciprocated as a unit. In addition to simplifying the device by using only one cam,
The bag feeding device automatically feeds the bag one by one so that the mouth of the bag is located between the suction parts when both arms are retracted to the end, and the mouth of the bag is held between the top and bottom by both suction parts and suctioned. This prevents the lower surface of the bag from sagging, and also monitors the condition in which the load is being fed.If the load is interrupted, the bag is held between both arms and the bag is moved forward and backward at the same time. This invention is designed to eliminate the waste of attaching bags to packets that pass through frequently, and the present invention will be described below with reference to an embodiment shown in the drawings.

/ is a turret board equipped with, for example, four packets at equal intervals in the circumferential direction, and when the number of packets is n, the index l' is intermittently moved clockwise as shown by the arrow in FIG.
It rotates intermittently for one rotation under the control of
A pusher 3 pushes the load through the packet into the bag attached to the packet at position (3), thereby pushing the bottom of the bag and removing the bag from the packet.

The Packetco consists of a pair of U-shaped grooved plates λα, 2a hinged to the opposite edges of the load passage opening of the turret board, and the drawing board is linked with a link 2b so as to interlock with each other. When the bag is mounted in the first position by the piston cylinder 2c connected to the turret plate/, the free ends are brought close to each other and narrowed, and when the mounting is completed, the free ends are separated from each other and opened, Until the load is pushed into the bag at the third position, the opening of the bag is held by friction from the inside, but its structure is well known (see Japanese Publication No. 57-57485) and will therefore be omitted here.

A bag feeding device S is attached to the machine body supporting the turret board L. A long synthetic resin tube A to be made into a bag is pulled out to a predetermined length by a pair of upper and lower pinch rollers 7, which has been wound around the bag feeding device beam B. When the drawing is finished, a heater cutter is cut just before the pinch rollers. This is a well-known type of cutter that operates to cut the tube in the width direction, heat seals the previous cut to form the bottom of the bag, and uses the latter cut to open the next bag. an endless belt conveyor that circulates in synchronization with the roller 7 and at the same speed as the circumferential speed of the pinch roller;
A supply plate 10 is placed in front of the belt conveyor, and the belt conveyor 9 advances with the tube A to be drawn out by the pinch rollers 6 and 7 placed on its upper surface, and stops when the pinch rollers stop, and at this time, the front end of the tube is Reach onto the front end of the supply plate ioO.

The above pinch roller, cutter, conveyor, and supply plate are the first
The opening of the cut bag made from the tube is always placed in the first position at a predetermined position on the supply plate 10 at a distance from the free end of the packet. located in position.

As shown in Fig. 4, the bag or 7-tube has folded gusset pieces //, // on both sides, and specific marks /2 are marked on the surface at regular intervals according to the height of the load to be stored. The bag feeding device is equipped with a photoelectric device/3 for detecting the mark 12 on the path of the tube A from the guide wheel 6 to the pinch row 27, and when the bag feeding device receives a signal to start operation, The pinch roller 7 and the conveyor 9 are driven, and when the photoelectric device/3 detects the next mark 7.2, the pinch roller and the conveyor are stopped.

The interval between the marks /2 differs depending on, for example, a tube for a bag in which four toilet paper rolls are placed in three stages, and a tube for a bag in which four or five stages of toilet paper are stored. In accordance with this, it is necessary to change the length of the upper surface of the belt conveyor and the positions of the cutter 9 and the photoelectric device 13. Therefore, in this embodiment, the bag feeding device s is moved in the front and back directions above the pet of the machine by wheels S'. A screw shaft 5α placed on the rail q' and rotatably mounted on the bed is screwed into the bag feeding device, and the bag feeding device can be moved back and forth by rotation of the screw shaft, and the belt conveyor 9 can be moved back and forth. The tension roller α is movable in the direction and is folded back 9′ by the tension roller α pulled forward by the spring 9α′.
It is formed. When the tube reel for the 3-tier bag is removed and the tube reel for the 4-tier bag is set in the bag feeding device, the bag feeding device is moved backward, thereby setting the cutter position to the 4-tier position, and at the same time The length of the upper surface of the conveyor can be reduced by extending the conveyor backwards against the tension roller 9α by using the rear roller qb, which extends the rear end of the belt conveyor that moves integrally, and by shortening the amount of folding 9'. Make it longer towards the back and use it for four tiers. Conversely, to change from four tiers to three tiers, move the bag feeding device forward, move the cutter and rear roller forward, increase the amount of turnback 9' on the conveyor, and change the length of the top surface of the conveyor and the position of the cutter. Adjust for three steps.

The photoelectric device/3 is a guide rod/3 installed in the bag feeding device.
α, Mount it on the threaded rod/3b so that it can move parallel to the path of the tube, and by turning the threaded rod/3b by hand in the forward and reverse directions, the mark for the 3rd stage and the mark for the 4th stage can be detected. Make it possible to match.

As shown in FIG. 5, the rear roller "?b" of the conveyor mentioned above is installed between the movable side wall that is integral with the bag feeding device 5, and the tension roller and other rollers are installed between the fixed side wall that is integral with the frame. The shaft end of the tension port to the arm is supported in the long hole 9c in the longitudinal direction provided in the fixed side wall, and when the upper surface length of the conveyor is shortened, the front part of the movable side wall is attached to the outer or inner surface of the rear part of the fixed side wall. Furthermore, the rear roller qb of the conveyor and the lower roller of the pinch roller 7 may be rotated by an endless chain wheel or the like.

In the machine body, the front end of the bag on the supply plate 10 of the bag supply device is held between the packet at the first position on the turret plate L and the supply plate 10 of the bag supply device 't, and is sucked. , a pair of upper and lower arm puffers α, /4tb for opening and covering the packet stopped at the first position, and a slider IS that pivots the rear ends of both arms and reciprocates in the front-rear direction; Cam/A that separates the suction parts at the front ends of both arms when both arms/Vα and 1Ilb move forward together with the slider
A guide 17 is provided to guide the reciprocating movement of the slider.

Both arms have a suction part /qα', ldab' facing each other at the front end.
Each suction part is connected to a negative pressure source with a flexible hose or the like through a rotary joint that pivotally connects the rear end of the arm to the slider and the hollow part of the arm.

The lower arm /4'b has an integral arm /g extending backwards, and a cam follower /g' such as a roller that moves on the cam surface 76' of the cam /6 is attached to the rear end, and the upper arm puffer A rod /q connects the intermediate parts of α and arm /g.

The cam surface 76' has a flat and high first half upper stage /Ot α, followed by a rearwardly downward sloped part /Ah, and a sloped part /A.
A low and short lower tier R that extends backwards at the lower end of b.
/lc. A swing cam 20 is placed above the lower part/6c with a gap that allows the cam follower/g' to pass through.
After the swinging cam 20, the swinging operation is performed by an actuator 2/ such as a piston cylinder. Turnover cam, 22
There is.

The swing cam 20 is able to swing freely around the axis Haha, it becomes horizontal.

The E-rutting cam 2 can take a horizontal position and a tilted position with the front end raised by actuating the actuator 2/.When in the horizontal position, the front end is connected to the rear end of the swinging cam, and its top surface swings. It also connects to the top surface of the cam (Figure 7). In addition, in the tilted position, the front end rises and separates from the rear end of the rocking cam, and the aforementioned cam follower/g' moves from the rear end of the rocking cam to the lower part l of the cam surface.
Allow it to fall onto the Ac (Figure 6).

The actuator tacho/operates the switching cam 2.2 into a horizontal position when the load forced into the bag through the packet of the turret plate breaks off. In this embodiment, a bag is attached to the packet of the first device I, and when this packet next rotates to the second position ■, further rotates to the fifth position ■ and stops, the load is pushed into the bag. . Therefore, when the packet in the first position rotates to the fifth position via the second position, it is detected whether or not there is a load to be pushed into the bag through this packet on the load conveyance path -13. For example, a sensor J, such as a phototube, is installed in the conveyance path 23, and when there is no load, the sensor 2Q sends a signal to a solenoid valve that operates the actuator/, and the actuator is activated to bring the switching cams J, 2 into a horizontal position. do.

A drive device 2 for reciprocating the slider/S.In this embodiment, the left side is a crank disk to which the rotation of the electric motor is transmitted at a reduced speed.2. ll-α, the lower end of the rocking arm 2Sb is pivotally mounted to the fuselage, and the rocking arm 2S is pivoted to the left side and the slider/S is pivoted to the elongated hole of the upper end of the rocker arm 2Sb. However, the actuator is of course not limited to this, and may be a chino or histone cylinder type fluid pressure actuator as in the conventional example described above.

If there is a load on the transport path 23 detected by the sensor, the turning cam 22 is in an inclined position, and while the turret plate is rotating, the slider S is slightly stopped at the last retreat, and the ga-
The cam follower /g' at the rear end of the arm /g passes through the rear end of the rocking force mass θ and falls onto the lower part 76C (Fig. 6), and the arm /'Ia, / The suction part "a, '+IQ'" at the front end of the lib is the front end of the bag of the supply plate 10, that is, the notch 70 provided by opening the mouth of the bag to the front end of the supply plate.
It is sandwiched and adsorbed within '.

In addition, both arms /lIa, /11. Suction part at the front end of b/l
A spring 2 is provided in order to bias the cam follower /g' against the cam surface 76' of the cam /6 at the same time as to urge the cam follower /g' to pinch the opening of the bag. The spring 26 may be a traction spring with each end attached to several arms as shown in the figure, but it may also be a traction spring with each end attached to each arm and a slider to individually pull each arm.

When the rotation of the turret plate stops, the drive device 2S moves the slider forward, and the cam follower/g moves the cam/6 along with this.
Climb up the slope /6b from the lower section 76C of the rocking cam 20.
Push it upward as shown by the broken line in Figure 6 and proceed. As a result, the front end of the arm /'Ia, /4'l) is attached to the spring 26.
The suction parts /lIa', /'Ib open apart against the bias of
' is the suction L ['JeD mouth'! Extend the chip //, // and spread it in the vertical direction. And the cam follower 7g'
When the bag climbs up the slope/bb, the mouth of the bag opens to its maximum,
After that, the cam follower advances on the high stage /Oa, and the suction parts of the arms 1tlcL, /llb reach the top and bottom of the free end of the packet of the first device I, and the opening of the bag is placed over the bucket)J. do. When the slider/S reaches its most advanced position, it then begins to move backward, but just before that, the free end of the packet unit, which had been closed until now by bringing its free end closer together, is opened using a piston cylinder, etc. If the bag is held from the inside, the suction parts σ' and 1I-b' will continue to suck the bag from above and below, and even if the bag moves backward with the slider, the bag will fly out from the packet. Also, in addition to opening the free end of the packet if necessary, open the valves in the middle of the intake pipes connected to each suction part /da α', /Q' only while the cam follower retreats above the high stage part /6a. It may be closed to interrupt the suction operation.

Then, when the slider starts to move backward, the bag feeder $1 receives a signal to start operating and drives the pinch roller rough and conveyor, pulls out a predetermined amount of tube A, and connects the front end of the tube and the mouth of the next bag to the supply board. , the cutter plate forms the bottom of the next bag and the mouth of the next bag, and waits for the next signal.

In addition, a nozzle nia for injecting air toward the packet in the first position is provided on the lower surface of the supply plate 10 at the rear of the notch 10', and when the slide retreats, air is injected from the nozzle 27 and attached to the packet. the remaining portion of the bag protruding from the packet is turned over into the packet, and during rotation from a first position to a second position to a third position, the remaining portion of the bag hangs from the free end of the packet; If something breaks it, the load becomes a piston and the bag becomes a cylinder when the load is pushed into the bag in the third position, and the air inside the bag is compressed to the bottom of the bag by the load, causing the bag to break. Preferably, the load is prevented from being stored in a predetermined condition.

Also, while the slider is moving back and forth, the load is pushed into the bag through the packet at the 6th position, and the loaded bag comes out from the packet onto the roller conveyor 2g, and then opens. The mouth of the bag that is in it can be closed.

As the slider retreats, the cam follower 7g' moves backward through the high step /lα and then descends the slope /Ac.As a result, the front ends of the arms /lIa, . . . /b gradually approach and close. Since the swing cam 2θ is connected to the lower part of the inclined portion 16c, the swing cam 20 moves backward on the horizontal upper surface from the middle of the cam follower #'ij: the inclined portion 76c. Therefore, once the front end of the arm "a, /l1l) is closed to a certain degree, it remains in that state, and the slider retreats to the end and the cam follower /g' moves from the rear end of the swinging force θ to the cam /
The suction part /lIα', /gb' at the front end of the arm /lα, 71b falls onto the lower part /Q of the supply plate 10 and stops (Fig. 6). Snap it from the top and bottom and suck it. Then, the turret disk starts one rotation, and the slider/3 waits for the rotation of the turret disk to stop, then starts moving forward, and repeats the above-mentioned process.

When the two sensors detect that the load has discontinued on the conveyance path 23, the actuator 2 is actuated to switch the turning cam 2.
! in a horizontal position, and connect the tip of the turning cam 2.2 to the rear end of the swing cam 20 (FIG. 7). Therefore, the slider/
When S moves backward, the cam follower 1g' moves backward from the rear end of the swinging force θ over the switching cam, 2.2, and cannot fall onto the lower stage side of cam/O/6c, so the suction section at the front end of both arms/
α', /Q' cannot be sucked by holding the opening of the bag. Next, when the slider moves forward, the cam follower moves over the switching cam and the swinging cam, climbs the slope part 6b from the middle, and both suction parts move forward without taking the bag, and the bag is placed in the first position. Do not attach it to the Of course, at this time, the sensor details are also transmitted to the bag supply device S, and the bag supply device does not operate even if it receives the operation start signal issued when the slider retreats, or the sensor does not operate the bag supply device when the slider retreats. Do not issue a start signal to the device.

As a result, while the sensor 29 does not detect a load on the conveyance path, the turret disk rotates intermittently, the slider and the upper and lower arms also reciprocate, and the bag feeding device stops operating. However, when the sensor detects a load on the conveyance path 2.3, the actuator 21 is actuated to place the turning cam 2- in an inclined position, and the bag feeding device is also actuated by the signal received when the slider retreats. Therefore, the bag can be attached to the packet in the first position again.

Suction installed at the front end of both arms! ll/lIα', /4b
It is preferable to always place the suction surfaces facing each other.

For this reason, each suction part is rotatably attached to the front end of each arm, and each suction part and the slider/S are entrained 2gα, 21
b, and even if each arm swings during the reciprocating movement of the Nuraita, the suction surfaces of each suction part are kept horizontal and facing each other by the connecting rod.

The reason why the swing cam 20 is provided in this embodiment is that the cam follower/g' is moved backward on the swing cam at the end of the slider's retreat, and the cam follower falls from the rear end of the swing cam onto the lower part IAc. Sometimes both suction parts/lα at the front ends of the upper and lower arms
This is to snap the opening of the bag from above and below within the notch 10' of the supply plate. However, if this is not necessary, the swing cam λθ may be omitted, and the turning cam 2- may be extended forward and connected to the lower part of the inclined portion /6c when the turning cam 2- is in the horizontal position. This causes the sensor J to move along the conveying path λ
When detecting that there is a load on 3, the switching cam, 2
2 is the actuator unit / which is in an inclined position, and as the slider retreats, the cam follower /g' is the inclined part of the cam /l-c
The suction parts /qα' and /llb' at the front ends of both arms gradually approach each other and sandwich the mouth of the bag from above and below in the cutout of the supply plate, and then the slider moves forward. When doing so, climb up the slope (iH) from the lower part/AC.

Further, when the load breaks on the conveyance path, the sensor detects this and operates the actuator to bring the switching cam 2- into a horizontal position and connect its front end to the lower part of the inclined portion /lb. Therefore, as the slider retreats, the cam follower /g' moves halfway down the slope /4C, and then moves backwards on the horizontal turning cam, causing the front ends of both arms to attract gA/+! α
', /4'b' are too far apart to pinch the opening of the bag, and the next time the slider moves forward, the cam follower moves on the turning cam, climbs the slope part tbb from the middle, and both suction parts Move forward without picking up the bag in succession and cover the packet in the first position with the bag.

In this way, according to the present invention, the pair of upper and lower arms are moved forward and backward together by a slider, and when there is a load on the conveyance path, the mouth of the bag is pinched by the opposing suction parts /gu α: /1Ibl at the front ends of both arms. The opening of the bag is opened and placed over the packet, and when the load is interrupted, the opening of the bag is not pinched by the suction part, and this method prevents the bag from being placed over the packet unnecessarily.

The upper and lower arms are connected by a rod and work together, so only one cam is needed to hold the opening of the bag and suction it, or to spread the opening of the suctioned bag and cover it with the packet. This combination provides the excellent features of being able to simplify the structure and provide a trouble-free device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 shows the entire shelf, a schematic top view, the second figure is a plan view of the same as above, Fig. 6 is a front view of the turret board, and Fig. 4 is a plan view of the entire shelf. FIG. 5 is an enlarged side view of the bag feeding device; FIG. 6 is a perspective view of a part of the tube for making bags; FIG. FIG. 7 is an explanatory diagram of the operation in a state where the switching cam is in a horizontal position and no bag is attached,
In the figure, Su is Nokukerato, left is bag feeding device, /'Ia, /l
1l) is the upper and lower arms, /4(a', /4'b' is the suction part at the front end of each arm, /S is the slider, /6 is the cam,
/6' is the cam surface, 7g is the arm, /g' is the cam follower, /
9 is a rod 1.2/ is an actuator, 22 is a switching cam, 23 is a load conveyance path, and 2'l is a sensor.

Claims (1)

[Claims] It is hinged to the opposite edge of the load passage opening, and is provided spaced apart from the packet through which the load to be stored in the bag passes, and the free end of the packet, and is used to cut a long tube to a predetermined length. At the same time, a bag feeding device is used to feed the opening of the bag to a predetermined position behind the free end of the packet, and a fl- The slider has a slider with a front end and a suction part facing opposite to the front end, and when the rear end is pivoted to the slider and moves forward with the thin slider, the suction part at the front end is positioned over the free end of the packet, and when the packet is retracted. At the time, the bag feeding device has a pair of upper and lower arms positioned above the mouth of the bags supplied, an arm that extends backwards from one of the arms and has several cam followers at the rear end, and the upper and lower arms move back and forth along with the slider. When moving forward, the cam follower is rotated, and when moving forward, the suction parts at the front ends of both arms are separated to open the mouth of the bag and placed over the free end of the packet, and when moving back, the suction parts are brought closer to feed the bag. A cam with a cam surface that pinches the opening of the next bag supplied by the device from above and below, a rondo that connects the arm of one arm with the other arm and moves both arms together, and a A spring is provided between the arm and the slider to urge the suction parts at the front ends of both arms to pinch the mouth of the bag, and a spring is provided to press the cam follower against the cam surface of the cam, and a spring is provided at the rear of the cam surface. 9 connected horizontally
, a switching cam that can separate the packets, a sensor that detects the presence or absence of a load on the transport path leading to the packet, and a switching cam operated by the sensor to operate the switching cam when there is a load on the transport path. An automatic bag mounting device for a bag filling and packaging machine, comprising an actuator that separates the switching cam from the rear of the cam surface and connects the switching cam to the rear of the cam surface when there is no load.