EP0493600B1 - Stacker - Google Patents
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- Publication number
- EP0493600B1 EP0493600B1 EP91908794A EP91908794A EP0493600B1 EP 0493600 B1 EP0493600 B1 EP 0493600B1 EP 91908794 A EP91908794 A EP 91908794A EP 91908794 A EP91908794 A EP 91908794A EP 0493600 B1 EP0493600 B1 EP 0493600B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- stacker
- tray
- main conveyor
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B41/00—Work-collecting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
- B65H29/34—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from supports slid from under the articles
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
- D05B33/02—Devices incorporated in sewing machines for supplying or removing the work and connected, for synchronous operation, with the work-feeding devices of the sewing machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/20—Belt drives
- B65H2403/21—Timing belts
Abstract
Description
- This invention relates to a stacker for stacking works, more particularly to an improvement of the conveying section for carrying the works into the main body of the stacker.
- In textile plants and the like, cut pieces of textile and lining are bonded by a hot press and then fed to a stacker to be stacked one after another. This type of stacker is disclosed in West German Patent Laid-open Application (DE-OS) No. P1660982.8 and Japanese Examined Utility Model Publication No. 42532/1986. This type of stacker uses a belt conveyor as a means for carrying works each consisting, for example, of a textile and a lining bonded together by a hot press. On the base of the stacker, a table is disposed in such a way that it can move between an operating position and a retracted position. When the table is at the operating position, it is designed to very closely oppose the lower surface of the conveyor. The work fed from the press is then carried over and pressed against the table by the conveyor as the conveyor belt turns. When the work is carried to a predetermined position, the table moves back to the retracted position, and thus the work drops downward and is stacked or collected on a collecting section.
- However, if static electricity accumulates on the belt and the works due to friction, the works are attracted by the belt due to the action of electrostatic forces exerted between them. Occasionally, when the table is moved back to the retracted position, a portion of the work is strongly attracted to the belt and thus does not drop neatly onto the stacking table. If it happens, the works may not be stacked in a good condition. That is, it may be folded or wrinkled. If this occurs, the stacker's intended purpose of stacking works in good order is not achieved.
- After a number of works have been carried or when the works are of a mixed fiber fabric of chemical fibers, a relatively high level of electrostatic charge will be generated. Thus, the works sometimes adhere onto the belt and are reluctant to drop. If the following works are nevertheless carried in one after another, the works jam around the dropping position, and these works must be stacked manually by an operator.
- It has been contemplated to add a static discharger to the stacker for preventing the affect of static electricity or to use a conductive fiber. However, the static induction increases to the maximum level at the moment the work and the table are separated from each other.
- For example, when a work of 100 % polyester fabric is carried by a Teflon type belt, the level of static electricity at the moment the table is retracted jumps up to 10 to 20 KV which is at least 10 times the value before retraction (measured by a collecting type measuring instrument Model KS-525, manufactured by Kasuga Denki Kabushiki Kaisha).
- No existing static discharger can remove such a great level of static electricity momentarily and entirely from the work. Even in those stackers having antistatic equipment, portions of the works are often attracted strongly enough by the belt to cause disorder in the stacking of the works. Moreover, if a static discharger is incorporated into the stacker, the entire stacker unit becomes larger. On the other hand, if a conductive fiber is used, the cost of the work is increased.
- Further, while a method of removing static electricity by spraying ion onto the belt using a corona discharger has been proposed, it is known that this method can exhibit no effect of removing static electricity in a stacker of the type in which works are brought into close contact with the blet.
- FR-A-2596031 discloses a belt-type conveyor wherein the lower surface of the belt contacts the workpiece.
- GB-A-21485 discloses a paper conveyor having a series of conveyor wheels.
- Therefore, it is an object of this invention to minimise the size of the entire stacker unit, to allow use of inexpensive works and to eliminate the affect on the works by static electricity, so as to provide a stacker which ensures loading and collection of works in good order.
- According to the present invention a stacker for use in conjunction with an external apparatus which successively feeds textile workpieces, towards the stacker, the stacker comprises:
stock means for stocking the textile workpieces fed from the external apparatus;
main conveyor means for conveying a textile workpiece to the stock means;
sub-conveyor means including a slidable table positioned above the stock means, for conveying the textile workpiece in cooperation with the main conveyor means, and table drive means for causing the table to slide between an operating position where the table can interleave the workpiece between the table and the main conveyor means, and a retracted position where the table can release the workpiece from the main conveyor means, whereby the textile workpiece disposed on the table in the operating position is dropped to the stock means in accordance with the movement of the table from the operating position to the retracted position; and
drive means for switching the main conveyor means between a first position where the main conveyor means can interleave the workpiece between the table in the operating position and the main conveyor means, and a second position where the main conveyor means separates from the table in order to permit the next workpiece to be transferred on the table,
the stacker being characterised in that said main conveyor means including:
a plurality of roll shafts disposed in the direction in which the workpiece is conveyed, wherein each of said roll shafts is provided with a plurality of spaced apart rollers for contacting the workpiece, and at least one pulley interposed between each pair of rollers;
a timing belt extended over said pulleys arranged in the direction in which the workpiece is conveyed; and
roll drive means for driving said timing belt to rotate said plurality of rollers. -
- Figure 1 is a front view of a roller conveyor in the stacker of this invention;
- Fig. 2 is a side view of the roller conveyor as viewed from the work supply side;
- Fig. 3 illustrates the principle of driving the roller conveyor;
- Fig. 4 is a front view of the stacker;
- Fig. 5 is a block diagram showing the electrical system of this invention;
- Fig. 6 is a side view of the stacker shown in Fig. 4; and
- Fig. 7 is a partially cut-away plan view of another embodiment of roller conveyor.
- A preferred embodiment of this invention will now be described below in detail referring to Figs. 1 to 7.
- In Fig. 4, a stacker generally shown with the
reference number 100 is disposed adjacent to a press not shown. A work formed by subjecting a lining and a fabric to hot pressing is fed to thestacker 100 via abelt conveyor 108. Thestacker 100 has a substantially rectangular metallicmain body 101 as a basic framework. Aroller conveyor 1 for carrying the work therein is suspended from thetop rail 101a of themain body 101 via abracket 17 and anadjuster 15. - As shown in Fig. 1, the
roller conveyor 1 consists of a long plate-like metal frame 5 and a plurality ofrolls 3 arranged to extend horizontally parallel to one another in themetal frame 5. It should be noted that the rear end (left end in Fig. 1) portion of theframe 5 is supported on thebracket 17 to be movable vertically. - As shown in Fig. 2, each
roll 3 consists of threerollers 3a made of a urethane rubber. Theserollers 3a are rotatably supported on themetal frame 5 by ashaft 7. Therolls 3 are arranged in such a way that the lower portions thereof extend below the lower edges of the side panels of theframe 5, as shown in Fig. 1. Referring again to Fig. 2, atoothed pulley 4 is interposed between each pair ofrollers 3a of eachroll 3. Atiming belt 2 is extended along the longitudinal axis of theframe 5 over each row oftoothed pulleys 4. - As shown in Figs. 1 and 3, a
tension roll 6 rotatably supported on themetal frame 5 is disposed between each pair ofrolls 3 so as to apply appropriate tension to thetiming belt 2 and maintain good engagement between the toothed pulleys and thetiming belt 2.Guide rolls 6a are rotatably disposed adjacent to the twooutermost rolls 3 of theroller conveyor 1 so as to allow thetiming belts 2 to be spaced from the lower portions of thetoothed pulleys 4. - The
foremost shaft 7 has a driventoothed pulley 13 at one end thereof as shown in Fig. 2. Adrive toothed pulley 14 is disposed on the output shaft of amotor 11 mounted on the front end portion of theframe 5 as shown in Fig. 1, and atiming belt 12 is extended over these twopulleys pulley 13 is rotated by themotor 11, thetoothed pulleys 4 are driven via thetiming belts 2 to rotate therolls 3. - Referring now to the
adjuster 15, apneumatic cylinder 10 is disposed on theframe 5 behind themotor 11. Thepneumatic cylinder 10 allows theroller conveyor 1 to operate vertically. Thepneumatic cylinder 10 has twoknobs pneumatic cylinder 10 can be controlled by suitably manipulating these twoknobs pneumatic cylinder 10 via a connectingpiece 19. The upper end of the bolt 15b is connected to aknob 15a disposed on thetop rail 101a, and the height of theroller conveyor 1 can be adjusted by operating theknob 15a. - A
horizontal slot 9 is formed at the rear end portions on the side panels of theframe 5 so that therearmost shaft 7 can move horizontally within theslot 9 via an adjusting mechanism (not shown) by operating atension bolt 8 screwed into theframe 5. In this manner, the tension to be applied to thetiming belts 2 can be adjusted. - Further, a row of
vertical slots 18 are defined on the side panels of theframe 5. Theshafts 7 inserted through theseslots 18 are constantly urged downward by the tension of thetiming belt 2. Incidentally, thestopper 18a shown in Fig. 2 is intended to prevent axial dislocation of theshaft 7. - As shown in Fig. 6, a slide table 102 is disposed below the
roller conveyor 1, which can move between the operating position (shown by the broken line in Fig. 6) and the retracted position (shown by the solid line) in thehousing 120 disposed behind themain body 101 with the operation of the table driving cylinder 104 (see Fig. 4). At the operating position, the slide table 102 carries a work in cooperation with therolls 3, while it allows the work to drop onto atray 105 when it moves back to the retracted position. - As shown in Fig. 4, a
light emitter 103a and alight receptor 103b, which together constitute awork sensor 103 are disposed on each side of thetop rail 101a. When thework sensor 103 detects a start of the operation of carrying in a work at theroller conveyor 1, thepneumatic cylinder 10 andmotor 11 are actuated. Upon detection of completion of the carry-in operation at theroller conveyor 1 by thework sensor 103, the rod of thetable driving cylinder 104 extends to return the slide table 102 from the operating position to the retracted position. In synchronization with the retracting motion of the slide table 102, themotor 11 is stopped and thepneumatic cylinder 10 is retracted to resume the original posture so as to lift theroller conveyor 1 to the original position. - The
tray 105 is mounted on the rod 107a of a pneumatictray supporting cylinder 107 disposed in the bottom of themain body 1, which operates so as to move thetray 105 up and down. Aload sensor 106 consisting of alight emitter 106a and alight receptor 106b is disposed between thetray 105 and the slide table 102. Theload sensor 106 detects the height of the stacked works stacked on thetray 105. Thetray supporting cylinder 107 is designed to automatically adjust the distance between the top of the stacked works and the slide table 102 to maintain a constant separation based on the detection data of theload sensor 106. - A
control box 110 is disposed below thebelt conveyor 108 for transferring works from the press into thestacker 100. Thecontrol box 110 has a control panel on the surface thereof, and acontroller 111 disposed therein as shown in Fig. 5. Thecontroller 111 controls operation of the stacker by driving solenoid valves 113,114 and 115 based on the output signals of the respective sensors. - More specifically, when the
work sensor 103 detects that a work is being carried to theroller conveyor 1, it outputs a start signal to thecontroller 111. When thework sensor 103 detects completion of the work carry-in operation at theconveyor 1, it outputs an end signal to thecontroller 111. - When the
load sensor 106 detects that the height of the works stacked on thetray 105 has not reached yet a predetermined level, it outputs a signal to that effect (space-left signal) to thecontroller 111. When theload sensor 106 detects that the height of the works stacked on thetray 105 has reached the predetermined level, it outputs a signal to that effect (space-full signal) to thecontroller 111. - Upon receipt of the start signal, the
controller 111 drives themotor 11 via amotor driver 112. At the same time, thecontroller 111 also operates thesolenoid valve 113 so as to supply air to one chamber of thepneumatic cylinder 10 and evacuate air from the other chamber thereof, whereby thecylinder 10 is pushed out. - Upon receipt of the end signal, the
controller 111 changes over thesolenoid valve 113 so as to evacuate air from one chamber of thepneumatic cylinder 10 and supply air to the other chamber thereof, whereby thepneumatic cylinder 10 is retracted. At the same time, thecontroller 11 also operates thesolenoid valve 114 so as to supply air to one chamber of thetable driving cylinder 104 and evacuate air from the other chamber thereof, whereby the rod of thetable driving cylinder 104 is pushed out. Immediately after completion of this operation, thecontroller 111 changes over thesolenoid valve 114 to assume its original posture so as to retract the rod of thecylinder 104. - The
controller 111 controls thesolenoid valve 115 based on the space-not-full signal from theload sensor 106 so as to supply air to one chamber of thetray supporting cylinder 107 and evacuate air from the other chamber thereof, whereby the rod of thetray supporting cylinder 107 is pushed out. Upon receipt of the space-full signal from theload sensor 106, thecontroller 111 maintains thesolenoid valve 115 in the state and allows thetray supporting cylinder 107 to keep this position. - Now, use of this
stacker 100 will be described below. A work is first carried to thestacker 100 by thebelt conveyor 108 and then carried into themain body 101 of thestacker 100. When thework sensor 103 detects this, thepneumatic cylinder 10 is extended to push down theroller conveyor 1, whereby theroller conveyor 1 is pivoted down on thebracket 17. At the same time, themotor 11 is driven to rotate therolls 3, whereby the work is carried to the predetermined position by the cooperation of therolls 3 and slide table 102. Upon completion of the work carry-in operation by thework sensor 103, thetable driving cylinder 104 is actuated to move the slide table 102 to the retracted position, whereby the work drops to thetray 105 and stacked thereon. - Meanwhile, the
motor 11 is stopped in synchronization with the retraction of the slide table 102 to lift theroller conveyor 1 by the retraction of thecylinder 10 and assume a stand-by posture. The slide table 102 quickly returns to the original position after dropping of the work. As the number of the works stacked on thetray 105 increases, the piston rod of thetray supporting cylinder 107 is retracted to move down thetray 105 little by little. - Since the work is carried into the
stacker 100 by theroller conveyor 1 in the above embodiment, the work is designed to be brought into contact with the lower portion of eachroll 3, in contrast with the conventional belt conveyor where the upper surface of the work is brought into contact with the entire surface of the belt. Accordingly, the contact area of the work with theroller conveyor 1 in this embodiment is very smaller than in the conventional conveyor, so that it never happens that the works are prevented from being released from theroller conveyor 1 by the static electricity exerted therebetween. - Moreover, the contact area with the work in each
roll 3 of theroller conveyor 1 is designed to be reduced by constituting eachroll 3 with threerollers 3a, so that the effect described above can be exhibited more remarkably. - Since two
timing belts 2 are extended over the respective rows oftoothed pulleys 4 interposed between therollers 3a, the tension of thetiming belts 2 can be applied evenly over the depth of theroller conveyor 1. Thus, the noise generated by the interference between the metal parts of therollers 3a and thetoothed pulleys 4 or abrasion of these parts and member can be prevented. - In addition, by the acts of the
tension bolt 8,slot 9 andslots 18, the tension applied to thetiming belts 2 can be adjusted. Accordingly, since the tension applied by thetiming belts 2 to therolls 3 can in turn be adjusted, the force applied to the work can be adjusted so as to comply with the kind of cloth. - In the above embodiment, the respective cylinders are designed to be driven by the
controller 111 in response to the conditions sensed by the respective sensors. This control covers the entire process from the introduction of the works to the stacking thereof onto thetray 105. Thus minimal manual operation is required and the stacking operation can be facilitated. - This invention can also be embodied as follows:
- (1) The
rollers 3a can be arranged alternately as shown in Fig. 7. In this arrangement, the contact area of the work with therollers 3a can be further reduced, and this arrangement is more effective for the mixed fiber fabric of chemical fibers which suffers notable generation of static electricity. - (2) The three
rollers 3a constituting eachroll 3 may be replaced by a multiplicity of discs. This constitution of theroll 3 can even further reduce the contact area of the work with therolls 3. Thus a further reduction of the electrostatic interaction can be achieved. - (3) The surface of the
roll 3 may be knurled so as to prevent slipping of the work. - (4) The pneumatic cylinder may be replaced with a hydraulic cylinder.
- (5) An industrial sewing machine may be used in place of the press as an apparatus for supplying works to the
main body 101 of thestacker 100.
Claims (5)
- A stacker for use in conjunction with an external apparatus which successively feeds textile workpieces, towards the stacker, the stacker comprising:
stock means (105) for stocking the textile workpieces fed from the external apparatus;
main conveyor means (1) for conveying a textile workpiece to the stock means;
sub-conveyor means including a slidable table (102) positioned above the stock means, for conveying the textile workpiece in cooperation with the main conveyor means, and table drive means (104) for causing the table to slide between an operating position where the table can interleave the workpiece between the table and the main conveyor means, and a retracted position where the table can release the workpiece from the main conveyor means, whereby the textile workpiece disposed on the table in the operating position is dropped to the stock means in accordance with the movement of the table from the operating position to the retracted position; and
drive means (10) for switching the main conveyor means between a first position where the main conveyor means can interleave the workpiece between the table in the operating position and the main conveyor means, and a second position where the main conveyor means separates from the table in order to permit the next workpiece to be transferred on the table,
the stacker being characterised in that said main conveyor means including:
a plurality of roll shafts (7) disposed in the direction in which the workpiece is conveyed, wherein each of said roll shafts (7) is provided with a plurality of spaced apart rollers (3) for contacting the workpiece, and at least one pulley (4) interposed between each pair of rollers (3);
a timing belt (2) extended over said pulleys (4) arranged in the direction in which the workpiece is conveyed; and
roll drive means (11, 14) for driving said timing belt (2) to rotate said plurality of rollers (3). - The stacker as claimed in claim 1 further comprising:
workpiece detecting means (103) for detecting the workpiece transferred to said table from said external apparatus, and for outputting a signal indicative of the start of the transfer operation of the workpiece; and
conveying control means (111) for controlling said conveyor drive means and said roll drive means, as a function of said signal from said workpiece detecting means. - The stacker as claimed in claim 1 further comprising:
completion detection means (103) for detecting the completion of the transfer of the workpiece from the external apparatus onto said table, and for outputting a signal indicative of the completion of the transfer; and
table drive control means (111) for controlling said table drive means (104), as a function of said signal from said completion detection means. - The stacker as claimed in claim 1, wherein the stock means includes a vertically movable tray (105), for receiving the workpieces, and tray drive means (107) for operating said tray.
- The stacker as claimed in claim 4, wherein the stock means further includes:
detecting means (106) for detecting the workpieces piled on said tray, and for outputting a detection signal indicative thereof, said detecting means being disposed at a given height between a highest and a lowest positions for said tray; and
control means (111) for controlling said tray drive means, based on said detection signal, and for adjusting the height of said tray.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2193230A JPH0479989A (en) | 1990-07-20 | 1990-07-20 | Stacker |
JP193230/90 | 1990-07-20 | ||
PCT/JP1991/000562 WO1992001831A1 (en) | 1990-07-20 | 1991-04-25 | Stacker |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0493600A1 EP0493600A1 (en) | 1992-07-08 |
EP0493600A4 EP0493600A4 (en) | 1992-12-30 |
EP0493600B1 true EP0493600B1 (en) | 1995-12-20 |
Family
ID=16304491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91908794A Expired - Lifetime EP0493600B1 (en) | 1990-07-20 | 1991-04-25 | Stacker |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0493600B1 (en) |
JP (1) | JPH0479989A (en) |
KR (1) | KR950000382B1 (en) |
DE (1) | DE69115668T2 (en) |
WO (1) | WO1992001831A1 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3209629A (en) * | 1963-03-11 | 1965-10-05 | Warren R Spivey | Apparatus for cutting, feeding and stacking articles of cloth |
US3937456A (en) * | 1974-09-26 | 1976-02-10 | Fairchild Industries, Inc. | Article stacking apparatus |
JPS52126339A (en) * | 1976-04-16 | 1977-10-24 | Kuinraito Denshi Seikou Kk | Coating and stitch feeding unit for cushion seat quilting machine |
JPS54116374U (en) * | 1978-02-03 | 1979-08-15 | ||
JPS59105477U (en) * | 1982-12-29 | 1984-07-16 | 株式会社クロダルマ大坪工場 | Sewing piece removal device |
CH660719A5 (en) * | 1983-05-04 | 1987-06-15 | Huemer Franz Xaver | Device for the automatic further transport of cloth webs discharged intermittently from a cutting machine |
JPS6077578U (en) * | 1983-11-01 | 1985-05-30 | 株式会社羽島 | Statzker |
JPS6142532U (en) * | 1984-08-24 | 1986-03-19 | ソニー株式会社 | Video camera |
FR2596031B1 (en) * | 1986-03-18 | 1988-08-12 | Eminence Sa | STACKING DEVICE, PARTICULARLY FOR TEXTILE PARTS |
JPS6368193A (en) * | 1986-09-09 | 1988-03-28 | 株式会社 九州エム・アイ・シイ | Stacker for sewing large crotch |
JPH0176775U (en) * | 1987-11-09 | 1989-05-24 |
-
1990
- 1990-07-20 JP JP2193230A patent/JPH0479989A/en active Pending
-
1991
- 1991-04-25 WO PCT/JP1991/000562 patent/WO1992001831A1/en active IP Right Grant
- 1991-04-25 EP EP91908794A patent/EP0493600B1/en not_active Expired - Lifetime
- 1991-04-25 DE DE69115668T patent/DE69115668T2/en not_active Expired - Fee Related
- 1991-04-25 KR KR1019920700609A patent/KR950000382B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH0479989A (en) | 1992-03-13 |
KR950000382B1 (en) | 1995-01-16 |
WO1992001831A1 (en) | 1992-02-06 |
KR920702450A (en) | 1992-09-04 |
DE69115668D1 (en) | 1996-02-01 |
EP0493600A1 (en) | 1992-07-08 |
DE69115668T2 (en) | 1996-05-02 |
EP0493600A4 (en) | 1992-12-30 |
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