JP5898008B2 - Conveyor magazine type empty bag feeder - Google Patents

Description

  The present invention relates to an improvement of a conveyor magazine type empty bag supply device for supplying empty bags to a bag filling and packaging machine.

  Patent Document 1 describes a conveyor magazine type empty bag supply device that supplies empty bags to an intermittent rotation rotary type bag filling and packaging machine. This conveyor magazine type empty bag supply device is arranged above the belt conveyor and a belt conveyor that feeds a stack of empty bags that are shifted in the front-rear direction so that the upper empty bag comes to the front side with the bag mouth facing forward An empty bag separating means, a positioning stopper disposed near the end of the belt conveyor, and an empty bag adsorbing member disposed on the rear side of the stopper. In FIGS. 1 and 2 of Patent Document 1, a claw wheel is further disposed between the empty bag separating means and the stopper.

  The empty bag separating means includes a rotating shaft that is supported by a frame installed on a belt conveyor and rotates by a motor drive, and a swing arm (arm 7) whose base is rotatably supported by the rotating shaft, Corresponding to a driven shaft rotatably supported at the end of the swing arm, a pair of left and right drive pulleys installed on the rotary shaft, and a delivery pulley installed on the driven shaft corresponding to each drive pulley A fast-feed belt (a pair of left and right) is provided around a driving pulley and a sending pulley that are arranged, and the swinging arm is swingable up and down around the rotating shaft. In the empty bag separating means, the fast-forward belt comes into contact with the empty bag, separates the uppermost empty bag from the empty bag group on the belt conveyor, and sends it forward.

  The claw wheel has a plurality of claw portions (projections) that are flexible and extend in the radial direction, is connected to a motor, rotates, and moves up and down between a lower delivery position and an upper retraction position. It moves, contacts the empty bag sent out by the empty bag separating means at the delivery position, sends it further forward, and contacts the stopper. The stopper is disposed near the end of the belt conveyor, and positions the empty bag sent out by the claw wheel. The said empty bag adsorption | suction member raises / lowers between the lower adsorption position which adsorb | sucks the upper surface of the empty bag positioned by the stopper, and an upper taking-out position.

An empty bag transfer means (another empty bag adsorbing member) different from the empty bag adsorbing member is disposed between the conveyor magazine type empty bag supplying device and the intermittent rotation rotary type bag filling and packaging machine. The empty bag transfer means receives and transfers the empty bag from the empty bag adsorbing member that has come to the take-out position, and delivers it to the gripper of the intermittent rotation rotary type bag filling and packaging machine.
Patent Documents 2 to 4 also describe conveyor magazine type empty bag supply devices each including an empty bag separating means.

Utility Model Registration No. 2603966 JP 2003-137219 A Japanese Patent No. 3898158 JP 2003-2307 A

The empty bag separating means of the conventional conveyor magazine type empty bag supply device described in Patent Document 1 and the like has the following problems.
(1) When supplying empty bags made of a material having a relatively large surface frictional resistance, the empty bags are relatively firmly adhered to each other in the stacked state, and the separation by the empty bag separating means is not successful. When the lower bag is sent forward with the lower bag overlapped with the empty bag, and the empty bag adsorbing member is sucked and lifted to the take-out position, the lower bag is also lifted together there were.

(2) When an empty bag whose surface is deformed (for example, undulated) is sent out by the empty bag separating means, the direction of the empty bag is disturbed, and there is a problem that positioning by the stopper cannot be performed accurately. This is because the contact state between the pair of left and right fast-feed belts and the empty bag is uneven on the left and right (for example, there is a timing when only one of the fast-forward belts contacts the empty bag), and this causes a difference in the delivery amount between the right and left of the bag. It is thought that it came out.

  The present invention has been made in view of the above-described problems of the conventional conveyor magazine type empty bag supply device, and has as its main object to ensure that empty bags can be separated and delivered by an empty bag separating means. Another object of the present invention is to prevent the orientation of the sent empty bag from being disturbed so that positioning can be performed accurately.

The present invention provides a belt conveyor for sending a group of empty bags that are stacked while being shifted in the front-rear direction so that the upper empty bag comes to the front side with the bag mouth facing forward, and the empty bag is disposed above the belt conveyor. An empty bag separating means for separating the uppermost empty bag from the group and sending it forward, a positioning stopper disposed near the end of the belt conveyor, and a front end of the empty bag on the belt conveyor contacting, and the stopper In a conveyor magazine type empty bag supply device including an empty bag adsorbing member that moves up and down between an adsorbing position that adsorbs the upper surface of a positioned empty bag and an upper take-out position, the empty bag separating means is connected to a common drive source A front delivery roller and a rear delivery roller that rotate and the circumferential speed of the front delivery roller is set to be larger than the circumferential speed of the rear delivery roller And features.
This conveyor magazine type empty bag supply device is provided with a claw wheel which comes into contact with the stopper and contacts the empty bag sent out by the empty bag separating means as required.

The conveyor magazine type empty bag supply device can take the following embodiment, for example.
(1) The empty bag separating means includes a pair of left and right front delivery rollers and a rear delivery roller, a rotating shaft that is rotated by the driving source, and a pair of left and right swings that are rotatably supported by the rotating shaft. A pair of left and right front delivery rollers are installed on the rotary shaft, and the rear delivery rollers are installed at the ends of the swing arms and rotate at the same peripheral speed.
(2) In the above (1), the rotating shaft is supported by a tip end portion of a swinging main arm which is installed so as to be swingable up and down.
(3) In (2) above, a pair of left and right pulleys are installed on the rotating shaft, belts are stretched between the pulleys and the rear delivery roller, and the rear delivery roller is rotated by the driving force of the belt. To do.

(4) In the above (3), the belt is stretched around the peripheral surface of the rear delivery roller, and the rear delivery roller contacts the empty bag through the belt. In this case, the belt corresponds to a conventional fast-feed belt, and the peripheral speed of the front-side feed roller is set larger than the peripheral speed of the belt (fast-forward belt).
(5) An empty bag group loosening means for applying vibration to the empty bag group is disposed above the belt conveyor at a position behind the empty bag separating means.
(6) In said (5), an empty bag loosening means consists of a loosening member which contacts an empty bag group intermittently, and a drive source which vibrates the said loosening member.

  The empty bag separating means of the conveyor magazine type empty bag supply device according to the present invention is configured such that the peripheral speed of the front sending roller is set larger than the peripheral speed of the rear sending roller. The uppermost empty bag in contact can be reliably separated from the lower empty bag in contact with the rear delivery roller and sent forward. Thus, when the empty bag suction member abuts the stopper and sucks the positioned empty bag and lifts it to the take-out position, the lower empty bag is prevented from being lifted together.

Further, in the empty bag separating means, a pair of left and right swing arms are installed so that they can swing up and down independently of each other, and a rear delivery roller is installed at each end thereof, so that an empty bag whose surface is deformed. Even when the left and right rear delivery rollers are sent out, the contact state between the left and right rear delivery rollers and the empty bag becomes uniform, the orientation of the empty bag can be prevented from being disturbed, and the positioning by the stopper can be performed accurately.
Further, when the empty bag group loosening means is arranged at the rear position of the empty bag separating means, the close contact between the empty bags is loosened in the empty bag group sent to the empty bag separating means, and the uppermost empty bag by the empty bag separating means Can be separated and delivered more accurately.

It is a perspective view of the conveyor magazine type empty bag supply device concerning the present invention. It is an expansion perspective view of the empty bag separation means of the same apparatus. FIG.

Hereinafter, with reference to FIGS. 1-3, the conveyor magazine type empty bag supply apparatus which concerns on this invention is demonstrated concretely.
1-3, a conveyor magazine type empty bag supply device includes a belt conveyor 2 for transferring an empty bag 1, a side guide 3 of the empty bag 1, a rear guide 4 integrated with the side guide 3, and an empty bag separating means. 5, a ratchet device 6, a positioning stopper 7, a positioning detection sensor 8, an empty bag lifting means (only a pair of empty bag adsorbing members 9 and 9 are shown), an empty bag unraveling means 11, and the like. In FIG. 1, a part of the empty bag separating means 5 is not shown in order to avoid complication.

  The empty bag unraveling means 11 is disposed above the belt conveyor 2 and includes an air cylinder 12 as a drive source and a unraveling member 13 fixed to the tip of the piston rod. The loosening member 13 vibrates back and forth by the operation of the air cylinder 12, and intermittently contacts the empty bag group 1 </ b> A sent to the empty bag separating means 5 by the belt conveyor 2, thereby loosening the close contact between the empty bags.

  The empty bag separating means 5 includes a drive motor 15 installed on a drive motor mounting frame 14 on the belt conveyor 2, and a base end portion is rotatably supported by an output shaft 16 of the drive motor 15. A substantially T-shaped swinging main arm 17 (corresponding to the swinging arm (arm 7) of Patent Document 1) that is swingable up and down, and an intermediate portion is rotatable at the tip of the swinging main arm 17 The supported rotating shaft 18, a pair of left and right front delivery rollers 19, 19 fixed to the rotating shaft 18, a driving force transmission mechanism 21 that transmits the driving force of the driving motor 15 to the rotating shaft 18, and a pair of rear delivery mechanisms 22. , 22, and a contact pressure adjusting mechanism 23 that adjusts the contact pressure of the front delivery rollers 19, 19. The drive motor mounting frame 14 is an angle member composed of a horizontal plate portion 14a and a vertical plate portion 14b, and a drive motor 15 is fixed on the horizontal plate portion 14a.

The driving force transmission mechanism 21 includes a driving pulley 24 fixed to the output shaft 16 of the driving motor 15, a driven pulley 25 fixed to the rotating shaft 18, and a driving belt stretched between the driving pulley 24 and the driven pulley 25. 26.
The rear delivery mechanism 22 includes a front pulley 27 fixed to the rotary shaft 18, a base end portion rotatably supported by the rotary shaft 18, and a swing arm 28 that can swing up and down around the rotary shaft 18. The rear delivery roller 29 is rotatably attached to the tip of the swing arm 28, and a belt 31 (hereinafter referred to as a fast-feed belt) stretched between the front pulley 27 and the rear delivery roller 29.

The contact pressure adjusting mechanism 23 includes a spring hook mounting bracket 32 fixed on the horizontal plate portion 14a of the drive motor mounting frame 14, a pair of spring hooks 33, 33 mounted on the spring hook mounting bracket 32, and spring hooks 33, 33. It comprises a pair of upper and lower springs 35, 35 stretched between spring engagement holes 34, 34 formed in the base end portion of the swinging main arm 17. The spring engaging holes 34, 34 are formed at both ends of the base end portion of the swinging main arm 17 (both ends of the portion corresponding to the T-shaped horizontal axis), and the pair of springs 35, 35 are the output shaft 16 of the drive motor 15. Are arranged substantially parallel to the longitudinal direction of the oscillating main arm 17 on both sides of the main body 17. The spring hook mounting bracket 32 is formed with a pair of upper and lower elongated holes 36, 36 substantially parallel to the longitudinal direction of the swinging main arm 17 (substantially parallel to the portion corresponding to the T-shaped vertical axis). The male threaded portion 33a of the spring hook 33 is fitted into the elongated hole 36 and fixed by a pair of lock nuts 37, 37, respectively.
The tension of the upper and lower springs 35 and 35 is adjusted by moving the positions of the spring hooks 33 and 33 along the elongated holes 36 and 36 (see the double arrows in FIG. 3), and this is applied to the swinging main arm 17. By adjusting the upward or downward urging force, the contact pressure of the front delivery rollers 19, 19 with respect to the bag 1 can be adjusted.

The diameter of the front feed roller 19 is set to be larger than the diameter of the front pulley 27, whereby the front feed roller 19 rotates at a higher peripheral speed than the rear feed roller 29 (and the fast feed belt 31).
When the empty bag group 1A on the belt conveyor 2 is sent toward the empty bag separating means 5, the rear delivery roller 29 that rotates faster than the feeding speed of the belt conveyor 2 is placed at the top of the empty bag group 1A via the fast-feed belt 31. The empty bag is separated from the empty bag group 1A and sent forward. The empty bag 1 sent forward by the rear delivery roller 29 (directly by the fast-forward belt 31) further contacts the front delivery roller 19 and is sent forward at a higher speed.

The claw wheel device 6, the stopper 7, and the detection sensor 8 are supported by the sub frame 38. The sub-frame 38 is disposed on the end side of a frame (not shown) of the belt conveyor 2 and can be adjusted in position in the front-rear direction (see the double-dotted line segment in FIG. 1).
The stopper 7 is supported at the rear end of the sub-frame 38, and has two notches 7a. The back surface of the stopper 7 is a stop surface 7b on which the empty bag 1 is abutted and positioned. A detection sensor 8 is installed in front of the stopper 7, detects that the empty bag 1 is in contact with the stopper 7 and is positioned, and outputs a detection signal.

  The ratchet wheel device 6 is pivotally supported by a pair of swing arms 39 and 39 that swing in the front-rear direction (refer to the arc of a double-headed arrow in FIG. 1) with the base end pivotally supported by the subframe 38. A rotary shaft 41 that is freely supported, a pulley 42 fixed to one end of the rotary shaft 41, and a pair of claw wheels 43, 43 are provided. An air cylinder (not shown) as a drive source for swinging the swing arms 39, 39 and a motor (not shown) as a drive source for rotating the rotary shaft 41 via the pulley 42 are housed in the subframe 38.

The claw wheel 43 has a plurality of claw parts (projections) 43a that are flexible and extend in the radial direction. When the swinging arms 39 and 39 swing, the claw wheel 43 moves between the feed position (position shown in FIG. 1) and the retracted position (front side beyond the stop surface 7b of the stopper 7). The delivery position is set at a position near the rear side of the stopper 7. When the claw wheel 43 moves between the feeding position and the retracted position, it passes through the notch portion 7a of the stopper 7, thereby avoiding interference between the claw wheel 43 and the stopper 7.
When the rotating claw wheel 43 moves to the delivery position and the empty bag 1 sent forward by the empty bag separating means 5 reaches the claw wheel 43, the claw portion 43a of the claw wheel 43 comes into contact with the empty bag 1, and Send forward. The empty bag 1 sent forward by the claw wheel 43 is positioned with its tip abutting against the stopper 7.

The pair of empty bag adsorbing members 9 and 9 move up and down between an adsorbing position for adsorbing the upper surface of the empty bag 1 positioned by the stopper 7 and an upper take-out position (position shown in FIG. 1). The suction position is located slightly rearward of the feeding position of the claw wheel 43.
In FIG. 1, 44 and 44 are grippers of a packaging machine (not shown). The empty bag 1 adsorbed and lifted by the empty bag adsorbing members 9 and 9 is transferred from the empty bag adsorbing members 9 and 9 to the grippers 44 and 44 by a chuck device (not shown) as in the conventional apparatus.

  By adjusting the position of the sub-frame 38 in the front-rear direction, the distance between the stopper 7 and the empty bag adsorbing members 9, 9 can be adjusted. By changing this distance, the distance is supplied to the grippers 44, 44 of the packaging machine. The height position of the empty bag 1 can be changed. On the other hand, since the relative position of the stopper 7 and the claw wheel 43 is not changed, even if the position of the stopper 7 with respect to the belt conveyor 2 is moved forward, the distance between the stopper 7 and the claw wheel 43 is not changed.

  The empty bag separating means 5 of the conveyor magazine type empty bag supply device includes a first swing detection sensor (not shown) that detects the swing of the swing arm 28 and a swing that supports the rotary shaft 18. A second swing detection sensor (not shown) that detects the swing of the main arm 17 is provided. When one or a plurality of empty bags 1 at the front end of the empty bag group 1A on the belt conveyor 2 enters under the rear sending roller 29 (fast-forwarding belt 31) and is sent forward, the rear sending roller corresponding to the thickness thereof. 29 is lifted, and the swing arm 28 supporting the rear delivery roller 29 swings upward. Further, when one or a plurality of empty bags 1 sent out by the rear sending roller 29 (directly by the fast-feed belt 31) enter under the front sending roller 19 and are sent further forward, the thickness of the bag 1 is increased. The front delivery roller 19 is lifted by the amount, and the swing main arm 17 that supports the rotating shaft 18 (front delivery roller 19) swings upward. When the first swing detection sensor detects that the swing arm 28 swings upward by a predetermined level or more, or the second swing detection sensor causes the swing main arm 17 to move upward by a predetermined level or more. When it is detected that the rocking has occurred, the belt conveyor 2 stops based on each detection signal.

Further, when the detection sensor 8 detects the positioning of the empty bag 1 and outputs a detection signal, the drive motor 15 for rotating the front delivery roller 19 and the rear delivery roller 29 (fast feed belt 31) stops. Subsequently, after the positioned empty bag 1 is adsorbed and lifted by the empty bag adsorbing members 9, 9, the drive motor 15 is driven again at a predetermined timing, and the front delivery roller 19 and the rear delivery roller 29 (fast-forward belt 31). ). Thus, the point which controls the drive and stop of the drive motor 15 of the empty bag separation means 5 based on the detection signal of the detection sensor 8 is the same as that of the conventional apparatus.
When the detection sensor 8 detects the positioning of the empty bag 1 and a detection signal is output, the belt conveyor 2 is stopped together with the drive motor 15. Thus, the belt conveyor 2 is controlled to move when no detection signal is transmitted from any of the first and second swing detection sensors and the detection sensor 8.

The operation of the conveyor magazine type empty bag supply device is as follows.
On the belt conveyor 2, the empty bag group 1A is stacked while being shifted in the front-rear direction so that the upper empty bag comes to the front side with the bag mouth facing forward, and both side edges are guided by the side guide 3 and conveyed forward. ing. The stacked empty bag group 1 </ b> A is subjected to vibration by the empty bag unraveling means 11 before the empty bag separating means 5, and is sequentially sent to the empty bag separating means 5. The empty bags 1 sent toward the empty bag separating means 5 come into contact with the rear delivery roller 29 via the fast-forward belt 31 and then contact the front delivery roller 19 to be separated from the empty bag group 1A one by one. It is sent forward.

  A plurality of empty bags that are not sufficiently loosened by the empty bag unraveling means 11 and are displaced in the front-rear direction are sent in close contact with the empty bag separating means 5 and further (directly) by the rear delivery roller 29. If the uppermost empty bag of the plurality of empty bags comes into contact with the front delivery roller 19 even when it is fed forward (by the fast-feed belt 31) The empty bag is fed forward at a higher speed than the lower empty bag still in contact with the rear delivery roller 29 (directly in contact with the fast-forward belt 31) at that time, and is separated from the lower empty bag. It is. Therefore, the empty bags 1 are sent out from the empty bag separating means 5 in a state where the empty bags 1 are separated one by one.

  Further, since the swing arms 28, 28 are rotatably attached to the rotary shaft 18, respectively, they can freely swing up and down independently of each other. For this reason, even if the surface of the empty bag 1 is deformed (for example, waved) and the left and right shapes are different, the left and right rear delivery rollers 29 and 29 (the left and right fast-forward belts 31 and 31) are empty. Following the surface shape of the bag 1, the bag 1 swings up and down, and the contact state between the left and right rear delivery rollers 29, 29 (left and right rapid feed belts 31, 31) and the empty bag 1 is kept uniform. Thereby, it is possible to prevent the orientation of the empty bag 1 fed forward by the rear delivery rollers 29, 29 (directly by the fast-forward belts 31, 31) from being disturbed.

  The swing arm 39 swings (to the left in FIG. 1) before the tip of the empty bag 1 sent forward by the empty bag separating means 5 reaches the delivery position of the ratchet wheel 43 on the belt conveyor 2. Then, the rotating claw wheel 43 moves from the retracted position to the delivery position. As a result, the empty bag 1 that has reached the delivery position is delivered further forward while being pressed by the ratchet wheel 43, and the tip abuts against the stopper 7 to be positioned. This positioning is detected by the detection sensor 8.

After the positioning detection by the detection sensor 8, the pinion wheel 43 stays at the feeding position for a predetermined short time, and then the swing arm 39 swings in the reverse direction (to the right in FIG. 1), and the pinion wheel 43 is at the retracted position. Moving.
Subsequently, the empty bag adsorbing members 9 and 9 are lowered to the adsorption position to adsorb the surface of the bag 1, and then are raised to the take-out position to lift the adsorbed empty bag 1 from the belt conveyor 2. At this time, since the ratchet wheel 43 has moved to the retracted position (the front side beyond the stop surface 7b of the stopper 7), the empty bag adsorbing members 9 and 9 and the empty bag 1 are not hindered. The empty bag 1 is held by a chuck of the chuck device (not shown), transferred as indicated by the white arrow in FIG. 1, and delivered to the grippers 44 and 44 of the packaging machine.

  In the above example, the rear delivery roller 29 does not directly contact the empty bag 1 but contacts the empty bag 1 via the fast-feed belt 31 stretched between the rear delivery roller 29 and the front pulley 27. Although the empty bag 1 is sent forward, the rotating rear delivery roller 29 may be in direct contact with the empty bag 1. In this case, as a part of the rear delivery mechanism 22, for example, a rear pulley having a smaller diameter than the rear delivery roller 29 is installed in parallel with each rear delivery roller 29 and coaxially with the rear delivery roller 29. The belt 31 is stretched between the front pulley 27 and the rear pulley. The driving force of the front pulley 27 is transmitted to the rear pulley via the rapid feed belt 31 and the rear delivery roller 29 rotates.

DESCRIPTION OF SYMBOLS 1 Empty bag 1A Empty bag group 2 Belt conveyor 5 Empty bag separation means 6 Claw wheel device 7 Positioning stopper 8 Positioning detection sensor 9 Empty bag adsorbing member 11 Empty bag unraveling means 12 Air cylinder 13 Unraveling member 15 Drive motor 16 Drive motor Output shaft 17 Swing main arm 18 Rotating shaft 19 Front feed roller 28 Swing arm 29 Rear feed roller 31 Rapid feed belt 38 Subframe 39 Claw wheel swing arm 43 Claw wheel 44 Gripper of packaging machine

Claims (8)

A belt conveyor that feeds a stack of empty bags shifted in the front-rear direction so that the upper empty bag comes to the front side with the bag mouth facing forward, and disposed above the belt conveyor, from among the empty bag group An empty bag separating means for separating the uppermost empty bag and sending it forward, a positioning stopper disposed near the end of the belt conveyor and contacting the tip of the empty bag on the belt conveyor, and an empty position positioned on the stopper In a conveyor magazine type empty bag supply device including an empty bag adsorbing member that moves up and down between an adsorbing position for adsorbing the upper surface of a bag and an upper taking-out position, the empty bag separating means is connected to a common drive source and rotates. A front delivery roller and a rear delivery roller are provided, and the circumferential speed of the front delivery roller is set larger than the circumferential speed of the rear delivery roller. Conveyer magazine-type empty bag supplying apparatus. The empty bag separating means includes a pair of left and right front delivery rollers and a rear delivery roller, a rotation shaft that is rotated by the drive source, and a pair of left and right swing arms that are rotatably supported by the rotation shaft. The left and right pair of front delivery rollers are installed on the rotary shaft, and the rear delivery rollers are installed at the ends of the swing arms and rotate at the same peripheral speed. The conveyor magazine type empty bag supply device described. The conveyor magazine type empty bag supply device according to claim 2, wherein the rotating shaft is supported by a tip end portion of a swinging main arm that is swingably moved up and down. 3. A pair of left and right pulleys is installed on the rotating shaft, a belt is stretched between each pulley and a rear delivery roller, and the rear delivery roller is rotated by the driving force of the belt. Or the conveyor magazine type empty bag supply apparatus described in 3. The belt is passed over the peripheral surface of the rear feed roller, a conveyor magazine type empty-bag supply according to claim 4, wherein the rear feed roller, characterized in that the contact with the empty bag through the belt apparatus.
6. The empty bag group loosening means for applying vibration to the empty bag group is disposed at a position on the rear side of the empty bag separating means above the belt conveyor. The conveyor magazine type empty bag supply device described in the above. 7. The conveyor magazine type empty bag supply device according to claim 6, wherein the empty bag unraveling means includes a loosening member that intermittently contacts the empty bag group and a driving source that vibrates the loosening member. A plurality of claw portions that have flexibility and extend in the radial direction are connected to the periphery of the claw portion, rotate in connection with a driving source, contact the empty bag sent out by the empty bag separating means, and send it further forward. The conveyor magazine type empty bag supply device according to any one of claims 1 to 7, further comprising a claw wheel to be brought into contact with the stopper.

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