CN1128752C

CN1128752C - Suction gripping unit

Info

Publication number: CN1128752C
Application number: CN99103661A
Authority: CN
Inventors: 马里奥·斯帕塔福拉; 弗朗哥·卡里亚尼
Original assignee: GD SpA
Current assignee: GD SpA
Priority date: 1998-03-11
Filing date: 1999-03-11
Publication date: 2003-11-26
Anticipated expiration: 2019-03-11
Also published as: ES2199495T3; DE69907999D1; ITBO980147A1; CN1229044A; DE69907999T2; RU2216498C2; IT1299894B1; EP0941953B1; ITBO980147A0; EP0941953A1

Abstract

A suction gripping unit (7) having a suction head (15) in which is defined a cavity (18) connected permanently to the outside via a through hole (23) and connected to a suction pump (14) by a conduit (20) controlled by a valve (22) housed inside the conduit (20) and close to the cavity (18).

Description

Suction gripping unit

Technical field

The present invention is about a kind of suction gripping unit.

In the following description, with the example of cigarette pack sectional wheel as a reference, especially with reference to the suction gripping unit of supplying blank on cigarette-packaging machine.

Background technology

Cigarette-packaging machine is known, and its adopts suction gripping unit to make blank grasp the station and blank is sent between the supply station on the respective seat of packaging wheel at the blank at billet storage one by one and transmits.

Known suction gripping unit comprises: a wheel that supports a plurality of dust collecters, on each dust collecter, limit a chamber, this chamber by by the through hole of first valve control and ambient atmosphere in one side UNICOM, link in the discharge head aspirating pump by the pipe of controlling by one second valve at its opposite side, second valve covers in the pipe usually, has with a certain distance from the chamber.In known grabbing device, two usually synthetic single slide-valves of valve.The dust collecter of the above-mentioned type is for example all disclosed in US Patent No 4009876 or european patent application No.317232.

For blank is remained on the dust collecter, this dust collecter is contacted with blank, blank limits a suction chamber near the chamber with the chamber, in suction chamber, forms vacuum (with respect to bar pressure) by closing first valve and opening second valve.In order to discharge blank, make and recover barometric pressure in the suction chamber by opening first valve and closing second valve.

The response time of grabbing device, that is add and remove the required time of suction force, the size of cumulative volume, suction pump performance and the above-mentioned through hole of suction chamber depended on; The cumulative volume of suction chamber equals the volume that the chamber is added in the pipe parts between the chamber and second valve.

It is necessary adopting the discharge head aspirating pump to make first valve, and its feature is that discharge head is quite big.Flow velocity is quite low, under the situation of the top load loss that is produced by through hole, if first valve does not cut out with regard to cisco unity malfunction when suction.

The device of the above-mentioned type has many shortcomings, most importantly need provide and control two independent valve or a quite complicated slide-valve concerning each dust collecter.In addition, consider the position of second valve, suction chamber has sizable volume.Therefore cause the response of valve quite slow.

Summary of the invention

The object of the present invention is to provide a kind of suction gripping unit that can overcome above-mentioned shortcoming, its low price also is easy to produce.

According to the present invention, a kind of suction gripping unit is provided, it comprises: at least one dust collecter, at least one is limited to the chamber in the above-mentioned dust collecter, vacuum aspirator in above-mentioned chamber, above-mentioned aspirator comprises: with the pipe of above-mentioned chamber UNICOM, the control cock of linking the aspirating pump on the aforementioned tube and settling along aforementioned tube is characterized in that: above-mentioned valve is positioned between said pump and the above-mentioned chamber and near this chamber; At least having a through hole on above-mentioned dust collecter for good and all is connected above-mentioned chamber in the ambient atmosphere.

Description of drawings

The present invention is now described with reference to the accompanying drawings.

Fig. 1 is the cutaway view of first embodiment of the invention, for clarity sake removes some parts,

Fig. 2 is the amplifier section along II-II line among Fig. 1, the details of two different stations of expression,

Fig. 3 is the section-drawing along III-III line among Fig. 2,

Fig. 4 is similar to Fig. 2, the details of the further station of presentation graphs 2.

The specific embodiment

The whole continuous packing machine of numeral 1 expression among Fig. 1, it comprises the packaging wheel 2 of a drive, it rotates (being counterclockwise rotation among Fig. 1) continuously around the corresponding axle (not shown) perpendicular to Fig. 1 plane, also comprise a plurality of hollows, equally spaced circumferential seat 3 (only illustrating), in order to the blank 4 of the corresponding pre-folding of admitting mill bristol or similar material one by one.Machine 1 also comprises the warehouse 5 that is used for blank 4 heaps 6; Be placed on the suction gripping unit 7 between the packaging wheel 2 of the open end 8 in the warehouse 5 that grasps station S1 and supply station S2, in order to from holding 8 to hold blank 4 and they are constantly delivered to corresponding position 3.

Grabbing device 7 comprises the roller 9 of a drive, and it is around the axle (not shown) that is parallel to wheel 2 and perpendicular to the fixing accordingly clockwise direction continuous rotation of center shaft 10 in Fig. 1 of the longitudinal axis 11 in warehouse 5.Roller 9 comprises inner chamber 12, and it links aspirating pump 14 by pipe 13, preferably adopts so-called " side chamber (side channel) " pump, in order to produce the vacuum with respect to external pressure in chamber 12.

Roller 9 supports a plurality of pneumatic extractings 15, and they are linked on the roller 9 around axle 10 configurations and by placing corresponding arm 16.Being clearly shown that in Fig. 2, each 15 be board-like substantially, and its side is linked on the corresponding wall 16, and opposite side is limited by gripping surface 17, and its lumen 18 is limited by ring edge 19 and linked in the chamber 12 by the respective tube 20 of processing along respective arms 16.

In illustrated embodiment, gripping surface 17 is limited by the end face at edge 19 substantially.

Link on corresponding 15 the junction 21 will managing 20, each pipe 20 is covered with a valve 22, in order to control tube 20, thereby that is switching valve 20 make it be connected and disconnect with chamber 18 accordingly.Be processed with through hole 23 at each on 15, thereby make corresponding chamber 18 and the permanent UNICOM of extraneous air.

Each valve 22 is known mechanical valve, it comprises valve head 24, with 24 engagement and the annual seat 25 of processing on joint 21, with a control stalk 26, this bar installs on the supporting walls 27 (Fig. 3) that covers on two perforates in the pipe 20 in the mode of endwisely slipping, move axially by acting device 28, and at open position (Fig. 2 does moving radially with respect to axle 10 a) and between the off position (Fig. 2 b), when open position, chamber 12 is also led to, when off position in chamber 18 and pipe 20 air communication therefore, chamber 18 not with pipe 20 air communication, therefore be not communicated with chamber 12 yet.

Acting device 28 comprises a body 29, it installs on the other end relative with linking head 24 ends of respective rods 26, and install on the roller 9, thereby with bar 26 with respect to the radially sliding of axle 10, thereby bar 26 is moved between above-mentioned opening and closing position.Acting device 28 comprises spring 30, its position be in limit chamber 12 wall 31 radially, and coaxial with bar 26; This spring is maintained in its closed position bar between corresponding wall 27 and body 29 usually.

Acting device 28 also comprises a columniform bar 32, and it installs on the body, makes it do longitudinal sliding motion with respect to body 29 along the corresponding axis 33 that is parallel to axle 10, and the one end is contained on the push rod roller of cooperating with stationary cam 35 34 with rotating manner.Cam 35 is made at roller 9 when axle 10 rotates, and each 15 body, 29 corresponding bar 26 radially moves between above-mentioned opening and closing position axle 10.

Bar 32 is controlled by acting device 36 along moving of axle 33, and in order to cut off the control of respective valves 22, it moves bar 32 between control position (Fig. 2) and leisure position (Fig. 4), at control position, roller 34 and cam 35 engagements, in the leisure position, roller 34 is thrown off with cam 35.Acting device 36 comprises known magnetic force actuator, and during power supply, bar 32 moves on to the leisure position along axle 33 from above-mentioned control position, makes bar remain on control position usually with the coaxial spring 38 of bar 32 between body 29 and roller 34.

As shown in Figure 1, each 3 is installed on corresponding 40 the outside face 39, and the swing of doing with respect to wheel 2 around the corresponding axis 41 that is parallel to axle 10 with under the control of the arm control setup of the unshowned known cam rocker of figure is linked on the wheel 2 in 40 inside.Each 3 comprise two mutually tilt and towards the bottom surface 43 athwartship plane 42, a plurality of holes 44 are processed into and are passed bottom surface 43, by linking in these holes on the known suction means (not shown).

Describe one with reference to Fig. 2 below and grasp an operational circumstances of 15.

For blank 4 being remained on 15 the gripping surface 17, face 17 is contacted with blank 4 substantially, blank is closed corresponding chamber 18, limit a suction chamber with chamber 18, in this chamber, form vacuum (for atmosphere) by closing corresponding valve 22, above-mentioned suction chamber links to each other with chamber 12, keeps constant vacuum by pump 14 in chamber 12.

Do not have serious problems by leading to the load loss that exterior through hole 23 causes, this is because pump 14 can compensate the quite high load loss that causes as hole 23 and so on.

In order to discharge blank 4, the atmosphere pressure energy in above-mentioned suction chamber by valve-off 22, is recovered by hole 23 simply automatically.

The suction chamber volume is less, just can make to grasp 15 and obtain the utmost point and react rapidly, only adorns a valve 22 simultaneously not only cheaply but also be easy to produce.

Describe the service condition of grabbing device 7 below with reference to Fig. 1, grasp 15 as example referring to one, in the respective seat 3 of supply station S2, have the blank 4 that has discharged, grasp 15 since roller 9 move to take out other blank towards grasping station S1 rotation.

At supply station S2 with grasp between the S1 of station, 15 valve 22 is maintained in its closed position.

When it passes through station S1, grasp a blank 4 of the end 8 in 15 contact warehouses 5, control blank by the suction of gripping surface.On the predetermined point that it moves, grasping a gripping surface 17 of 15 is placed to substantially and contacts with the contact jaw 8 of blank 4, before just arriving above-mentioned position, acting device 28 moves on to above-mentioned open position with valve 22, so that chamber 12 is linked in chamber 18, as a suction, blank contact jaw 8 is attached on the gripping surface 17 by chamber 18.

When roller 9 rotated, 15 left the extracting station S1 that blank 4 has held, deliver to supply station S2, and at S2, blank 4 is delivered on corresponding 40 the respective seat 3.

At station S2,40 in a known way by the arm assembly (not shown) of above-mentioned known cam rocker around corresponding axis 41 swings, thereby keep the gripping surface 17 of a period of time towards 15.During this period of time make gripping surface 17 be in the position of contact surface 43 substantially in the 15 insertion seat 3, before just arriving above-mentioned position, acting device moves on to above-mentioned off position with valve 22, to cut off suction by chamber 18, suction by the hole on the face 43 44 discharges blank 4, is inhaled by the suction of seat 3.

As shown in Figure 1, when blank 4 was delivered on the

seat

3,15 inserted in the respective seat blank 4 are converted into U-shaped along the folding line (not shown) of known preparative treatment.

Top operation is that circulation repeats.

For preventing that blank 4 from sending into seat 3, must prevent that corresponding 15 is being taken out blank 4 during S1 by the station, this function is provided by acting device 36.Especially by when 15 the passage of station S1, provide energy to make roller 34 break away from cam 35 for corresponding magnetic force actuator 37, thereby prevent that corresponding valve 22 from opening, thus make gripping surface 17 under the situation that does not possess suction by station S1, it contacts with the end 8 of blank 4 but can not hold blank.

Among another embodiment that does not show in the drawings, chamber 18 is divided into a plurality of loculuses that separate, and these loculuses are divided by aperture portion and keep ventilation mutually; Face 17 is limited by the end face of the end face at edge 19 and above-mentioned perforate part, thereby provides bigger bearing surface for blank 4.

In another embodiment not shown in the figures, chamber 18 is by a plurality of minor diameter through holes 23 and outside atmosphere gas circuit UNICOM.

Claims

1. suction gripping unit, comprise at least one dust collecter (15), at least one is limited to the chamber (18) in the above-mentioned dust collecter (15), in order to vacuum aspirator (13,14 in above-mentioned chamber (18), 20), above-mentioned aspirator (13,14,20) comprising: with the pipe (20) of above-mentioned chamber (18) UNICOM, link the aspirating pump (14) on the aforementioned tube (20) and be placed in control cock (22) between said pump (14) and above-mentioned chamber (18), it is characterized in that for one along aforementioned tube (20); Said pump (14) is " side chamber " aspirating pump with anti-emission carburetor head and high flow rate, and above-mentioned valve (22) is positioned on the point of connection (21) that connects aforementioned tube (20) and above-mentioned dust collecter (15), thereby makes its near chamber (18); At least having a through hole (23) on above-mentioned dust collecter (15) for good and all links above-mentioned chamber (18) in the ambient atmosphere.

2. device as claimed in claim 1 also comprises the roller (9) that rotates and support the drive of above-mentioned dust collecter (15) around anchor shaft (10).

3. device as claimed in claim 1, wherein above-mentioned valve (22) are mechanical valve (22), and this device comprises in order to control the machinery controls (28) of above-mentioned valve (22) position.

4. device as claimed in claim 3, wherein above-mentioned machinery controls (28) comprise the shutoff device (36) of the control of cutting off above-mentioned valve (22).

5. device as claimed in claim 3, wherein above-mentioned machinery controls (28) comprises links the bar (26) that above-mentioned valve (22) is gone up and can be vertically moved, and this bar (26) moves valve (22) between open position that opens and closes aforementioned tube (20) accordingly and off position.

6. device as claimed in claim 5, wherein above-mentioned machinery controls also comprise the push rod roller (34) that is mechanically connected on the above-mentioned bar (26), by above-mentioned push rod roller (34) ingear stationary cam (35), thereby move above-mentioned bar (26) in axial circulation.

7. device as claimed in claim 4, wherein above-mentioned shutoff device (36) comprise the magnetic force actuator (37) of throwing off from above-mentioned cam (35) in order to above-mentioned push rod roller (34).

8. one kind in order to be fed to blank (4) in the device on the packaging wheel (2) with a plurality of seat (3), and each seat all is used to admit corresponding above-mentioned blank (4); This device comprises: the extracting station (S1) on the warehouse (5) that stores above-mentioned blank (4), and the supply station (S2) on above-mentioned packaging wheel (2), it is characterized in that: this device comprises as the suction gripping unit in the claim 3 (7), the roller of above-mentioned drive (9) makes above-mentioned dust collecter (15) by above-mentioned extracting station (S1), to take out corresponding above-mentioned blank (4) from above-mentioned warehouse (5); By above-mentioned supply station (S2) above-mentioned blank (4) is delivered to corresponding above-mentioned seat (3).

9. device as claimed in claim 8, wherein above-mentioned dust collecter (15) are made in the corresponding above-mentioned seat (3) that can be inserted on the above-mentioned supply station (S2), thereby will be converted into U-shaped in the above-mentioned blank (4) present (3).