JP5582306B2 - Adsorption device - Google Patents

Description

  The present invention relates to an adsorption device that adsorbs an end portion of a packaging bag when the end portion is opened, for example.

  For example, in the bag opening device of the automatic packaging machine according to Patent Document 1, a pair of left and right upper suction ports are provided to move up and down on the upper side of the bag, and a lower suction port is provided on the lower side of the bag, The lower side of the flat bag that has been carried by the conveyor is adsorbed by the lower suction port, the upper side of the bag is adsorbed by the upper suction port, and the upper suction port is raised to open the bag opening. In addition, a suction device is employed in which the distance between the upper mouthpieces is changed according to the size of the bag.

Japanese Patent No. 3622092

  However, in the suction device employed in the bag opening device according to Patent Document 1 described above, since the suction hose is connected to each upper suction port, handling of each suction hose is complicated and improved. There is room.

  The present invention has been made in view of such points, and an object of the present invention is to provide an adsorption device that supports an adsorbent body in a movable manner and can secure an adsorbing force from the adsorbent body to an object to be adsorbed. To do.

The present invention provides a cylindrical suction nozzle that extends linearly, a groove that extends in a longitudinal direction provided on a peripheral wall of the suction nozzle, and a means for solving the above-described problems. A plate-shaped spring steel stretched so as to close the groove portion of the suction nozzle, and an adsorbent that communicates with the inside of the suction nozzle and is movable along the plate-shaped spring steel. It is.
In the first aspect of the invention, since the adsorbent is guided along the plate spring steel that closes the groove of the suction nozzle, the adsorbent is supported movably by the suction nozzle, and suction from the suction nozzle to the adsorbent is performed. Power can be secured.

According to a second aspect of the present invention, in the first aspect of the present invention, the suction nozzle is screwed into the suction nozzle, and a shaft to which a rotation shaft of a servo motor is connected is provided at one end. It is a feature.
In the invention of claim 2, by rotating the shaft, the adsorbent can be moved along the groove extending in the longitudinal direction of the suction nozzle.

According to a third aspect of the present invention, in the second aspect of the present invention, the adsorber is slidably disposed in the suction nozzle and is screwed into a threaded portion of the shaft. And a suction part having a plurality of suction holes that are connected to the screwing main body part via the plate-shaped spring steel and arranged outside the suction nozzle and communicated with the screwing main body part. It is a feature.
In the invention of claim 3, the adsorbent can be moved by rotating the shaft, and can be transmitted to the suction port of the suction portion of the adsorbent without reducing the suction force from the suction nozzle.

The invention described in claim 4 is the invention described in claim 3, wherein each of the suction ports is provided on an upper surface of a raised portion provided in the suction portion, and the height of the raised portion is higher than the height of the raised portion. A rubber ring is fitted.
In the invention of claim 4, it is possible to increase the adsorption force to the object to be adsorbed by each of the suction ports.

The invention described in claim 5 is the invention described in any one of claims 2 to 4, wherein the suction nozzle is connected to the main body of the servo motor at one end, and a suction hose is connected to the other end. It is characterized by that.
In the fifth aspect of the invention, the suction hose is connected to the end of the suction nozzle that supports the adsorbent so as to be movable, so that the structure is not complicated.

The invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5, the adsorbents are provided in a pair of left and right along the plate-shaped spring steel so as to be able to contact and separate from each other. To do.
The invention of claim 6 is optimal as a suction device employed in a bag opening device of a packaging machine.

  In the adsorption device of the present invention, the adsorbent can be movably supported by the suction nozzle, and the adsorbing force from the adsorbent to the object to be adsorbed can be ensured.

FIG. 1 is an exploded perspective view of an adsorption device according to an embodiment of the present invention. FIG. 2 is a perspective view of a threaded main body portion of the adsorbent. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a perspective view of the suction port of the adsorbent. FIG. 5 is a top view of the mouthpiece of FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a cross-sectional view taken along the line CC of FIG. FIG. 8 is a perspective view showing a state in which the adsorbent is disposed along the plate spring steel. FIG. 9 is a perspective view of a bag opening device in which the present adsorption device is employed. FIG. 10 is a view showing a state in which the end portion of the bag is sucked and opened by the suction device.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, the suction device 1 according to the embodiment of the present invention includes a cylindrical suction nozzle 25 that extends linearly, a groove 26 that extends in the longitudinal direction provided on the peripheral wall of the suction nozzle 25, and a suction The thin plate spring steel 27 stretched so as to close the groove portion 26 of the nozzle 25 and the adsorbent 2 that communicates with the inside of the suction nozzle 25 and is movable along the thin plate spring steel 27 are provided. In the form, for example, the pair of left and right adsorbers 2 and 2 are configured to be movable toward and away from each other along a thin plate spring steel 27 stretched in the groove portion 26 of the suction nozzle 25.
In the adsorption device 1 according to the embodiment of the present invention, one or three or more adsorbers 2 are arranged along the thin plate spring steel 27 stretched in the groove portion 26 of the suction nozzle 25 as necessary. Of course, it is also possible to adopt a configuration that allows movement to an arbitrary position.

  As shown in FIG. 1, the suction nozzle 25 linearly extends in a cylindrical shape having a rectangular cross section, and a slit-like groove portion 26 is formed in the entire longitudinal direction of the upper wall. A thin plate spring steel 27 is disposed in the groove portion 26 of the suction nozzle 25 so as to close the groove portion 26. A shaft 30 extends inside the suction nozzle 25. The shaft 30 is formed with male screw portions (not shown) whose spiral directions are opposite to each other. One end of the shaft 30 is connected to the rotating shaft 33 a of the adsorption member moving servo motor 33 via a connecting member 32. Further, lid members 35a and 35b are fitted to both ends of the suction nozzle 25, respectively. The main body of the adsorption member moving servo motor 33 is fixed to one lid member 35 a, and the rotation shaft 33 a is inserted into the opening 36 a of the lid member 35 a and coupled to one end of the shaft 30 via the coupling member 32. . The other lid member 35b is provided with a suction opening 36b, and a suction hose 64 is connected to the opening 36b.

  As shown in FIG. 1, the adsorbent 2 is formed of a synthetic resin, is slidably disposed in the suction nozzle 25, and has a cylindrical threaded main body 37 that is threadedly engaged with the male threaded portion of the shaft 30. Connected to the screwing main body part 37 via the thin plate-shaped spring steel 27 and connected to the suction part 38 having a plurality of suction holes 60 arranged outside the suction nozzle 25 and communicating with the inside of the screwing main part 37. Configured.

  As shown in FIGS. 1 to 3, the screwing main body portion 37 is formed in a cylindrical shape having a predetermined length, and has a disk-like shape having a female screw portion 40 screwed into a male screw portion of the shaft 30 inside one end. The screwing portion 41 is fitted so as not to rotate but to move in the axial direction. The threaded portion 41 has a female threaded portion 40 at the center thereof, and two curved openings 42 and 42 for ventilation are provided around the female threaded portion 40. A plurality of circular openings 42 may be provided. Flat portions 43 and 43 for preventing rotation are provided on the outer peripheral surface of the screwing portion 41 so as to face each other. On the other hand, the flat surface portions 44 and 44 where the flat surface portions 43 and 43 of the screwing portion 41 come into contact with each other are also formed so as to face each other in the fitting portion of the screwing main body portion 37. A protruding portion 45 is formed on the upper portion of the screwing main body portion 37 so as to protrude in a gentle mountain shape along the axial direction with a predetermined width. The width of the projection 45 is set to be substantially the same as the width of the thin plate-like spring steel 27 which is narrower than the width of the groove 26 of the suction nozzle 25. The inside of the protrusion 45 is recessed 48 from the inner wall surface of the screw main body 37. The projecting portion 45 is provided with two through holes 46, 46 penetrating in the width direction across the recessed portion 48 in the front-rear direction with the pillars 47, 47 as boundaries. In this way, the through holes 46, 46 of the protrusion 45 communicate with the inside of the screwing main body 37.

  The suction port 38 is formed in a plate shape having a predetermined thickness, as shown in FIGS. A raised portion 55 having a rectangular shape in plan view is raised on the horizontal plane 50 of the suction port 38. A space 56 is formed inside the raised portion 55, and the space 56 is continued up to the main body of the suction port portion 38. A concave portion 57 having a gentle mountain shape in the axial direction for accommodating the protrusion 45 of the screwing main body portion 37 is formed on the lower surface of the suction port portion 38. Openings 58 are respectively formed on both wall surfaces of the mountain-shaped recess 57, and each opening 58 communicates with the space 56 as can be seen from FIG. 6. A plurality of suction ports 60 communicating with the internal space 56 are formed in the upper wall portion 59 of the raised portion 55. In this way, the openings 58 and 58 provided on both wall surfaces of the concave portion 57 of the screwing main body portion 37 and the suction ports 60 of the raised portion 55 communicate with each other through the space 56. In addition, the suction port portion 38 is formed with through holes 51 and 51 penetrating in the width direction at two locations at intervals in the longitudinal direction. The through holes 51 and 51 are penetrated so as to cross the respective openings 58 and the recesses 57. A plurality of annular protrusions 61 extending along the entire circumference are formed on the outer peripheral surface of the raised portion 55 at intervals in the vertical direction. A rubber ring 62 is fitted to the raised portion 55. The height of the rubber ring 62 is formed higher than the height of the raised portion 55. The rubber ring 62 can be firmly fitted to the raised portion 55 by the plurality of annular protrusions 61 provided on the outer peripheral surface of the raised portion 55.

As shown in FIG. 1, screw main bodies 37 screwed into the male screw portions of the shaft 30 are slidably disposed inside the suction nozzle 25, and the protrusions 45 of the screw main bodies 37 are slidable. Is exposed to the outside from the groove 26 of the suction nozzle 25. At this time, the adsorbents 2 and 2 are arranged so that the raised portions 55 provided in the suction port portion 38 are close to each other.
The thin plate spring steel 27 is disposed along the protrusion 45 of each screwing main body portion 37 so as to cover the groove portion 26 of the suction nozzle 25, and both end portions of the thin plate spring steel 27 are both ends of the suction nozzle 25. It is fixed between the lid members 35a, 35b fitted to the portion and the holding members 63, 63. And each screwing main-body part 37 and each suction mouth part 38 are connected between the projection part 45 of the screwing main-body part 37, and the recessed part 57 of the suction mouth part 38 via the thin plate-shaped spring steel 27. As shown in FIG. Specifically, as shown in FIG. 8, with reference to FIGS. 2 and 4 as appropriate, mounting screws 65, 65 are respectively inserted from through holes 51, 51 opened on one side of the suction port 38, and screwed main body portion The tip screw portions of the mounting screws 65, 65 are protruded from the through holes 51, 51 opened through the through holes 46, 46 provided in the projecting portion 45 of the 37 and opened on the other side surface of the suction portion 38. Subsequently, the tip screw portions of the mounting screws 65 and 65 are respectively screwed into screw holes provided at both ends of the rectangular mounting plate 66 in contact with the other side surface of the suction port portion 38, and each mounting screw is further attached. By screwing nuts 68, 68 into the threaded ends of the screws 65, 65, the screw main body 37 and the suction port 38 are connected. As a result, each through-hole 46, 46 provided in the protrusion 45 of each screwing main body 37 and each opening 58, 58 provided in both wall surfaces of the recess 57 of each suction port 38 communicate with each other. The inside of each screwing main body portion 37, that is, the inside of the suction nozzle 25 and the suction ports 60 of the suction port portions 38 communicate with each other.

  As a result, when the suction body moving servo motor 33 is driven to rotate, the shaft 30 is rotated, and the pair of left and right suction bodies 2, 2 move along the thin plate-shaped spring steel 27 in a freely detachable manner. At this time, since the groove portion 26 of the suction nozzle 25 is closed by the thin plate-like spring steel 27, the suction force from the suction nozzle 25 to each adsorbent 2 can be secured.

  For example, as shown in FIG. 9, the suction device 1 according to the embodiment of the present invention described above is employed in a bag opening device of a packaging machine that opens a bag 100 that has been carried in (see FIG. 10). Although details will be described below, for convenience of explanation, in FIG. 9, the right side in the figure is assumed to be the rear and the left side in the figure is assumed to be the front.

  For example, as shown in FIG. 9, the bag opening device includes a pair of left and right long side bars 4, 4 extending in the front-rear direction and a pair of front and rear short bars 5, 5 extending in the left-right direction. A frame 6 having a rectangular shape in a top view is provided. An upper plate 7 is stretched over rails 4a and 4a provided on the upper surfaces of the longitudinal bars 4 and 4, respectively. Supports 10 and 10 are respectively suspended from both ends of the upper plate 7. Also, a servo motor 11 for forward / backward movement that moves the support columns 10 and 10 in the front-rear direction together with the upper plate 7 is disposed near the front side of one longitudinal bar 4. The rotational force of the servo motor 11 for forward / backward movement is transmitted to the plurality of driven pulleys 12a and the transmission belt 13a. A midway portion of the transmission belt 13 a is engaged with engagement portions 15, 15 provided at both ends of the upper plate 7. Thereby, when the servo motor 11 for back and forth movement is driven to rotate, the plurality of driven pulleys 12a and the transmission belt 13a rotate so that the upper plate 7 moves on the rails 4a and 4a along the front and rear direction, and the support columns 10 and 10 moves in the front-rear direction.

  A pair of upper and lower suction devices 1, 1 according to an embodiment of the present invention are spanned on the front surfaces of columns 10, 10 suspended from both ends of the upper plate 7. On the upper plate 7, a vertical movement servomotor 16 that moves the pair of upper and lower suction devices 1, 1 to be movable toward and away from each other is disposed on one end side where the front / rear movement servomotor 11 is disposed. The rotational force of the vertical movement servomotor 16 is transmitted to the plurality of driven pulleys 12b and the transmission belt 13b. Each of the suction devices 1 and 1 is engaged with the front side of the support 10 of the transmission belt 13b. The engagement mechanism is such that the pair of upper and lower suction devices 1 and 1 are in contact with the movement of the transmission belt 13b. It is configured to be separable. As a result, when the vertical movement servomotor 16 is driven to rotate, the plurality of driven pulleys 12b and the transmission belt 13b rotate to move the pair of upper and lower suction devices 1 and 1 detachably.

  A support member 17 that supports the bag 100 (see FIG. 10) that has been carried in is fixed to the front short-side bar 5. The support member 17 includes a pair of left and right bars 18 and 18 whose upper ends are fixed to the front short-side bar 5, a first connecting bar 19 that connects the lower ends of the bars 18 and 18, Each of the second connecting bars 20, 20 extending in the front-rear direction from the lower ends of the bars 18, 18, and the first connecting member 19 and the support plate 21 fixed on each of the second connecting members 20, 20. On the support plate 21, two L-shaped guide members 21 a extending in the front-rear direction are fixed at intervals in the left-right direction.

  And in a bag opening apparatus, according to the magnitude | size of the bag 100, the space | interval of the left-right paired adsorption bodies 2 and 2 of the adsorption | suction apparatus 1 and 1 which concerns on embodiment of this invention is adjusted first. When adjusting, the suction body moving servo motor 33 is driven to slide the pair of left and right suction bodies 2 and 2 to arbitrary positions.

  Next, the vertical movement servo motor 16 and the front / rear movement servo motor 11 are driven and suction into the suction nozzle 25 is started. As shown in FIG. 10, the bag 100 is carried onto the support plate material 21 of the support member 17, and the bag 100 is carried in such a state that the end portion 101 slightly protrudes from the rear end of the support plate material 21. Thereafter, the pair of upper and lower adsorption devices 1, 1 move toward each other while moving toward the front, and the adsorbers 2, 2 of the pair of upper and lower adsorption devices 1, 1 (the suction ports 38, 38) 55 sandwiches the end portion 101 of the bag 100 from above and below, and sucks the end portion 101 of the bag 100 from the respective suction ports 60 of the suction ports 38 and 38 (the raised portions 55 and 55), whereby the end portion 101 of the bag 100 is It is adsorbed by each adsorbent 2, 2. In addition, since the rubber ring 62 higher than the height of the raised portion 55 is fitted to the raised portions 55 of the suction portions 38 and 38 of the respective adsorbent bodies 2 and 2, the bag 100 is adsorbed to the respective suction ports 60. You can increase your power.

  By the way, the suction force from the inside of the suction nozzle 25 passes through the through holes 46 provided in the protrusions 45 of the screwing main body portion 37 and the spaces 56 in the suction portion 38 from the screwing main body portion 37 of each adsorption body 2. Then, it is transmitted to each suction port 60 provided on the upper wall portion 59 of the raised portion 55.

  Next, as shown in FIG. 10, when the pair of upper and lower suction devices 1, 1 move backward while moving backward while maintaining suction from the suction ports 60, the end portion 101 of the bag 100 is moved. Open. Thereafter, the product is packed into the bag 100 in the next step.

  As described above, according to the suction device 1 according to the embodiment of the present invention, each of the adsorbers 2 and 2 communicates with the suction nozzle 25 and is supported by the suction nozzle 25 so as to be movable (contactable and separable). In addition, since it is guided along the thin plate-shaped spring steel 27 stretched so as to close the groove portion 26 of the suction nozzle 25, it is not necessary to connect the suction hoses to the suction bodies 2 and 2, respectively. Adsorption force from the bodies 2 and 2 to the object to be adsorbed, here, the bag 100 can be ensured. Further, the suction portion 38 of each of the adsorbing bodies 2 and 2 is provided with a raised portion 55 having a plurality of suction ports 60 on the upper surface, and a rubber ring 62 higher than the height of the raised portion 55 is fitted to the raised portion 55. Therefore, the suction force of the bag 100 to each suction port 60 can be increased.

  Further, the suction device 1 according to the embodiment of the present invention is adopted as a bag opening device of a packaging machine, and the suction devices 1 and 1 having a pair of left and right suction bodies 2 and 2 that can be separated from each other are connected to each other. If a pair of upper and lower parts are provided so as to be able to contact and separate, even when the size of the bag 100 is different, it can be easily handled.

DESCRIPTION OF SYMBOLS 1 Adsorber, 2 Adsorber, 25 Suction nozzle, 27 Thin spring steel, 30 Shaft, 33 Servo motor for adsorber movement, 37 Screw body part, 38 Suction part, 40 Female thread part, 41 Screw part, 55 Bump Part, 60 suction port, 62 rubber ring, 64 suction hose

Claims (6)

A cylindrical suction nozzle extending linearly;
A groove extending in the longitudinal direction provided on the peripheral wall of the suction nozzle;
Plate spring steel stretched to close the groove of the suction nozzle;
An adsorbent that communicates with the inside of the suction nozzle and is movable along the plate-shaped spring steel;
An adsorption device comprising:   The suction device according to claim 1, wherein the suction nozzle is provided with a shaft to which the suction body is screwed and a rotation shaft of a servo motor is connected to one end.   The adsorbent is slidably disposed in the suction nozzle, and is connected to the threaded main body of the shaft that is screwed to the threaded part of the shaft via the plate-shaped spring steel. The suction device according to claim 2, further comprising a suction portion that is disposed outside the suction nozzle and has a plurality of suction ports that communicate with the inside of the screwing main body portion.   The said each suction port is provided in the upper surface of the protruding part provided in the said suction part, The rubber ring higher than the height of this protruding part is fitted to this protruding part, The Claim 3 characterized by the above-mentioned. Adsorption device.   The suction device according to claim 2, wherein the suction nozzle is connected to a main body of the servo motor at one end and a suction hose is connected to the other end.   The adsorbing device according to claim 1, wherein a pair of left and right adsorbing bodies are provided along the plate-shaped spring steel so as to be able to contact and separate from each other.

Images