JPS602424A - Machine for sealing bag - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a machine for sealing bags, and more particularly to a machine for closing bags 11 filled with contents with adhesive tape.

(Prior Art) British Patent No. 1,381,871 and Specification 14I of British Patent No. 1,517,031 filed by the present applicant both disclose a part of a seal 11 formed by adhesive tape of a predetermined length. This relates to a machine that seals bags containing products. In the machines described in both patents, the open end of the filled bag to be closed is introduced into a tapered nip formed between a pair of opposing endless belts. When the end of the bag is held within the tapered nip,
A push device that moves faster than the belt speed
er) moves along the nip of the belt and pleats the edges of the bag. The pushing device pushes the edge of the shirred bag onto the wrapping mechanism, and the wrapping mechanism wraps the adhesive tape around the shirred neck of the bag.
11- by forming a knot in the neck of the bag. The device is then moved away from the nip so that the edge of the next bag filled with items can be folded -1 from the nip.
-Return to the starting position of the flow.

In the machine described in British Patent No. 1,571,021 and in the second embodiment of the machine described in British Patent No. 1,381,871, the pressing device is Adhesive tape is applied around the shirred neck of the bag by pressing the shirred western part of the bag into contact with the tape and pushing the shirred western part of the bag into contact with the adhesive tape between the bag and a pair of opposing jaws. 111-. British Patent No. 1,381,871 - A first embodiment of the pressing device described in the specification is shown in FIG.
The folds of the bag stuffed with goods are supported by the folds of the bag, and the stretched neck is supported, while the Jigo facing the other hand moves towards the neck of the bag and wraps adhesive tape around the stretched neck of the bag. Seal the neck of the bag.

A pair of opposed endless belts, a drive mechanism associated with a pushing device and a pushing device, extend in the direction of movement of the filled bags and extend the length of the bag sealing machine. It accounts for more than half of I-.

In addition, the mechanism for moving the device is
The pressing drives the device in a position aligned with the nip between the pair of bells I and the opposing feed bell! It must be possible to retract the device by pressing at a position offset from the nip between. Therefore, the drive mechanism for the pressing device is quite complex.

U.S. Pat. No. 2,840,987 describes another bag-14+l-machine for sealing a bag by forming an adhesive tape knot on the shirred neck of a bag filled with items. ing. In this example, the open neck of the bag filled with goods is fed between a pair of oppositely rotating wheels, and a pair of wheels that rotate in opposite directions.
The month 11 is shirred in the working area between an adhesive strip supported by a pair of spring-loaded jaws. After the IvI part of the bag has been pleated, the neck of the bag is folded into a spring-loaded pair by moving a pair of oppositely rotating wheels in the direction of bag feeding. taken between the jaws of US Patent No. 2
U.S. Pat. No. 2,867,087, filed earlier by the same inventor as No. 840,987, describes such a bag closing and sealing device; The device is not sufficient to close large bags used for packaging potatoes, apples and oranges. In the machine described in U.S. Patent No. 2,887.087, which seals the opening of a bag by twisting the opening of the bag, 1 yen 1 part of the bag filled with goods is opposed to each other with a rotating shaft fixed. hand! I] is shirred by a pair of counter-rotating wheels, and the hooked arm then engages the shirred neck of the filled bag, which in turn engages the shirred neck of the bag with opposing springs. A piece of adhesive tape on the neck of the bag, pulling it between a pair of shows loaded with! By twisting, a knot is formed in the western part of the bag. Of course, the hooked arm is based on the aforementioned earlier British patent no. 1,301.
, 871- and 1,517,031 refers to a device, that is, a spring for attaching adhesive tape to the folded six parts of a bag filled with items. It satisfies the same function as a device that fits the neck between a pair of jaws.

(Problem of the Invention) A machine according to the present invention for tying the ends of a bag containing articles with adhesive tape J=t+l- is a machine for sealing 11 where the ends of the bag are shirred and moving the bag towards the working area. At least one pair to send the ends! An adhesive tape having a wheel that rotates counter-rotating in l-i and an adhesive surface facing the wheel that rotates counter-rotating in q-i, located at +iii in the sealing 1F working area, and a tape that is biased to 7 with a spring in front of the adhesive tape. a movable carriage having a pair of pivoted clamping jaws and a spring biased pivotably mounted clamping jaw, the movable carriage having: The seal 11 is provided to move back and forth to move a pair of clamping jaws back and forth through the working area, and as the clamping jaws move, the folds of the bag are removed! Pass around the H-shaped +'r section, pass around the folded 11 section of the bag, and fold the bag! Wrap adhesive tape around the bent neck and tie and seal 6 parts of the bag.

In the machine for sealing bags according to the invention, the axes of rotation of the two counter-rotating wheels for shirring the opening 16 parts of the bag filled with goods are fixed in position. The jaws for applying the knot of adhesive tape to the shirred neck of the bag move around the 1 yen part of the shirred bag so as to apply the adhesive tape without moving the neck of the bag. This represents a significant difference compared to the devices shown in U.S. Pat. No. 2,840,987 and U.S. Pat. It is moved by moving the axes of rotation of a pair of opposed wheels, in the latter of which a hook-like arm pulls the pleated western part of the bag through a knot-forming device. If the neck of the open bag to be applied is held stationary, the weight of the contents of the bag will not have any effect on the formation of the knot.The machine according to the invention is therefore similar to that of U.S. Pat. No. 2, '840.9.
Ei? This eliminates the drawbacks of the machine described in the specification.

The fore-and-aft movement of the movable carriage supporting the clamping jaws only requires the same length as the completed adhesive tape knot, and is similar to the above-mentioned British Patent No. 1,381.
, No. 871) and No. 1,517,031 Souseikata, the moving distance of the push L 4-1 device is considerably shorter. Thus, the overall length of the machine according to the invention is reduced by at least half as compared to the machine described in the earlier application. Another advantage is that in the case of pressing, the device or the corresponding hook-like arm can be omitted completely, and the adhesive tape tie is therefore applied to the neck of the bag (one device can be omitted in the ☆ position). Therefore, the structure of the machine can be simplified.

Another advantage of the machine according to the invention is that it is no longer safe to operate in rotation with the flight conveyor. +111 In the machine described in the specification of the prior application, the products are transferred by a flight conveyor, and the pushing and lifting device is synchronized with the movement of the flights of the flight conveyor. The machine according to the invention also avoids the need for a flight conveyor by avoiding pressing devices and feed belts, and also by avoiding the need to move the neck of the machine to which the adhesive tape is applied.

A working area is formed between a pair of counter-rotating wheels and a clamping jaw, and a working area is formed between a pair of counter-rotating wheels and a clamping jaw C.
Preferably, it is further limited by a pair of fingers extending upstream from the -stream end of the clamping jaw. In this case, it is preferred that a piece of adhesive tape pass through the holes in the opposing fingers.

The two pairs of counter-rotating wheels are closely spaced apart and are located in one of the paths of the clamping jaws and fingers.
- Preferably located on the 14 side. Although the corresponding wheels of each month may share a common hub, the drive wheel has one (1) common hub, and the other wheels of each month
Preferably, it is not directly driven and is mounted for independent operation. Preferably, the other wheels for each month are independently sprung/heirsed to the drive wheel. The wheel is made of rubber or other elastomeric material on the remainder of the wheel to provide a surface that grips the edge of the bag filled with the contents to be rolled.
), each preferably having a contact surface formed by adhering.

Preferably, the machine has a motor for driving counter-rotating wheels, a movable carriage and means for applying adhesive tape strips. In this case, move 11' with a flexible carriage and a piece of adhesive tape.
i! by means of a pair of single-rotation clutches. l!
Preferably, it is operated by one motor which operates continuously. Preferably, the operation of the clutch is triggered by a detector that detects the presence or absence of a bag in or immediately within the work area of the seal 11.

Preferably, the machine has a printing machine for printing information on the Jl adhesive side 1- of the adhesive tape, which printing machine is disclosed in the above-mentioned British patent no. 1
, 516, 4!39. Where the adhesive tape has a plurality of spaced apart pieces of non-adhesive material such as paper, a single piece of adhesive tape is disclosed in the aforementioned GB 1,381,871 and GB 1,517,031. Preferably, it is provided by a gripper device similar to the device described in Specification No. 1.

The machine according to the invention has the advantage of being very compact, light and easy to use. Therefore, the machine of the present invention, together with the conveyor belt associated with the machine, can be easily tilted against the surface of a tree, and can easily handle bags containing crumbly items such as potatoes, carrots, and other vegetables. can be fed by a conveyor and easily sealed by the machine of the invention.

(Structure and operation of the invention) An embodiment of a bag-sealing machine according to the present invention, which has bag filling and sealing functions, will be described with reference to the accompanying drawings.

The machine of this embodiment which has both bagging and sealing functions is a manual bagging station (baggerstati).
In the bagging station I, products such as bread loaves are packed r- into polythene bags 2 held in a wicket 3. After being packed into bags, the products are manually pushed onto the belt conveyor 41-. A machine 5 for making bags is provided with a bag introduction part 6 near a belt conveyor 4, which has a pair of brushes rotating in opposite directions. Opening the bag filled with the product through the bag introduction part 6 [
” The neck passes through.

The machine for making bags has a reel 7 for adhesive tape and a reel 8 for paper tape. As shown in FIG. 3, the adhesive tape supplied from the reel 7 passes through a hot foil blocking type printing machine 9 to a pair of feed rolls IO. The paper tape supplied from the reel 8 passes through l pairs of feed rolls 11 and comes into contact with the -1- stream of adhesive tape on the feed roll IO. The paper tape and adhesive tape supply mechanism includes two pairs of cutting blades 12 and 13 and a gripper device 14;
A gripper device 14 grasps the free end of the tape and holds it across the path of the end of the bag to be closed.

Adhesive tape and paper tape supply mechanisms are disclosed in the aforementioned earlier British Patent Nos. 1,381,871 and 1,517.
, 031, so it will not be described in detail here. gripper
The device 14 is opened and closed by the operation of a pneumatic cylinder 15.

The open end of the bag filled with products is drawn into the bag introduction part 6 by brushes rotating in opposite directions, and Q
- two pairs of wheels 16 and 17 rotating in opposite directions;
passes through the nip between the The paired wheels 16 share a common hub as shown more clearly in FIGS. 4 and 7, and as shown in FIG. l! Driven continuously. A pair of wheels 17 is mounted for free rotation on a pair of pivoted arms 20 which are biased by springs 21 to press wheels 17 against wheels 16. be done. wheels 16 and 1
7 have rubber tires 22 and 23, respectively.

As shown in FIGS. 5 and 6, the bagging and packaging mechanism includes a pair of pivotally supported clamping jaws that are mounted on the carriage 25.
g jays ) 24, and the carriage 25 can be moved along a slide 26 towards or away from the wheels 16 and 17. The pivotally supported clamping jaw 24 is spring-biased by a compression spring 27 and has a curved contact surface.
dbutment faces) 2B.

An extended finger portion 29 extending from the abutment curve 28 is oriented between the wheels 16 and 17 to define the seal 11 working area. The extension finger portion 29 is connected to the feed roll l.
It has a hole in the finker part 29 so as to be between the nip of the wheel +8H17 and the abutting curved surface 28, and has a hole for grasping the free end of the adhesive tape and the paper tape from the do of O and passing it through the gripper device 14. Pull a length of adhesive tape through it.

During use, the open end of the bag filled with products is connected to the wheel 16.
and 17, these wheels draw in the end of the bag and also pull the finger 29
, a strip of adhesive tape and a seal 1 defined around the wheels 16 and 17 are fed into the work area. The edges of the bag filled with products are folded in 1 [11 - 1 meter area]
8. Clamping jaws 25 are used to form a knot with adhesive tape around the shirred end of the bag.
moves toward the wheels 16 and 17, and the contact curved surface 2
Step 8 presses the adhesive tape around the pleated neck of the bag filled with the product to tighten the folds of the bag filled with the product.
, 1′ that was set! Wrap adhesive tape around part 1. Further movement of the clamping jaws 24 in this direction causes the free ends of the pieces of adhesive tape to adhere to each other, completing the knotting of the bag. The shirred lvi portion of the bag is held substantially stationary when a knot is formed around the 1″1 portion, and the clamping jaws 24 are held in place when the carriage 25 returns to its initial position. moves backward, and then the flood movement causes the closed end of the bag filled with the product on the opposite side of the contact curved surface 2B to move so as to be scraped from the wheels 16 and 17. The tied part is held stationary so that while the knot is being formed, the product in the body of the bag moves slightly away from the direction of movement of the continuously moving conveyor 41-. The movement of the product in the bag along the container 74 causes the shirred and sealed neck of the bag filled with the product to move away from the bag sealing machine 5. Complete.

Operation of the machine to seal the bags is triggered by a bag detector located just downstream of the nip between wheels 16 and 17. This detector is connected to a pivot arm 30 lightly biased with a spring. , arm 30 and an associated proximity switch 31. A bag neck that enters the nip between wheels 16 and 17 moves arm 30 out of the path of the bag neck so that the last part of the bag After entering the nip, arm 30 returns to the path of the bag, and arm 3
0 leaves the proximity switch 31 and seals the bag 11-. Trigger the mechanism to Proximity switch 31 actuates a first medium-rotation clutch 32, shown in FIG. 7, which is driven by electric motor 18 via chevron bell I.33. The first single rotation clutch 32 causes the shaft 34 to rotate once, and this rotation causes the crank wheel 35 to rotate. The crank wheel 35 moves the carriage 37 along the slide 26 via a link 36 and moves the clamping jaws 24 towards or away from the wheels 16,17. Also, the shaft 34 is 3
It supports two cams 37, 38 and 38. These cams 37, 38 and 39 have associated proximity switches 40.
41 and 42 act together to actuate the cutter 12,13 and actuate the pneumatic cylinder to release the Greenher device 14, actuating the printing press 9, shown in FIG. 8 and driven by the toothed belt 33. second tit,
The one-turn flanch 43 is operated. The second single rotation clutch 43 rotates the shaft 44 one revolution, thereby
The gripper device 14 is driven via the crank wheel 45 and associated links 4B, 47 and 4 so that the gripper device 14 is driven up and down. Also shaft 44
supports another cam 49 which cooperates with a proximity switch 50 to deactivate the pneumatic cylinder 15 to close the gripper device 14 at the end of its stroke. And gripper device 1
4 grabs the free end of the adhesive tape, grips and pars the device 14
In the Returns I Loaf, the adhesive tape is pulled out through the path of the neck of the bag. Single rotation clutches 32 and 43 are manufactured by Motioncon I Roll Inc. (14) of Rockford, Illinois, USA.
tionControl Incor-porate
d) Company Motel No.

It was previously designated as C2P5-CCW-24-3-1.

(Effects of the Invention) As described below, the machine according to the present invention is very small and light and quick, and is easy to use. It has an easy effect.

[Brief explanation of the drawing]

Figure 1 is a hemostasis diagram of a machine that has bagging and sealing functions, and Figure 2 is a hemostasis diagram of a machine that has bagging and sealing functions. A plan view of the machine, Figure 3 is a front view showing the bag tying part of the machine, Figure 4 is a side view showing the bag tying part of the machine as seen from one side, and Figure 5. is a side view showing the bag tying section of the machine described in -1- as seen from the other side, FIG. 6 is a 1F view showing the bag tying section enlarged in detail, and FIG. 7 is the bag tying section. FIG. 8 is a sectional view taken along the line 8-A of the bag-tying portion in FIG. 3. 9-m-Printing machine, 10.11--One feed roll, 1
4-m-gripper device, 16, 17--wheel, +8--' electric motor, 2
2, 23-m-rubber tire, 24-11 clamping jaws, 25-m-carriage, 28--v+, /, facing surface, 28-m-part of finger, 32, 43-m-single rotating clutch.

Claims (1)

[Scope of Claims] (1) Counter-rotation to at least one pair of U-shapes for feeding the ends of the bags toward the area (29) for sealing 11 in which the ends of the bags containing the articles are shirred; a wheel (16° + 7), an adhesive tape with an adhesive surface facing the wheel (16, 17) which rotates counter-rotatingly and located in front of the sealing 11-working area (29); A pair of pivoted clamping jaws (24
, 28), the spring-biased and pivotally supported clamping jaws (2)
4,28') back and forth through the Jolt work area.
1- of a movable carriage (25) provided to move back and forth in order to move the pair of clamping jaws (24, 28), the clamping pano jaw (24°28) It is characterized by passing around the folded portion of the bag by moving it, wrapping the adhesive tape around the folded western part of the bag, and tying and sealing the neck of the bag. A machine that seals bags. (2) the pair of wheels (llll) that rotate in opposite directions;
i, +7) and the clamping jaws (24, 28).
a pair of fingers (29) extending from the upstream tip of the clamping jaw (28) beyond the nip between the counter-rotating wheels (18, 17);
1. A machine for sealing bags according to claim 1-1, further comprising restricting twisting and passing a piece of adhesive tape through the holes in the opposed fingers. (3) Clamping show (24°28
) A machine for sealing bags according to claim 1 or 2, comprising two pairs of counter-rotating wheels (1G, 1?) located on either side of the passageway. (4) Each of the pair of wheels (18) is a wheel that runs on and drives a common hub;
A bag according to claim 3, characterized in that each of the wheels (17) is a pole that is not directly driven and is independently spring biased with respect to the drive wheel (16). A machine that performs (5) Said wheel (16,1?) is formed of a rubber or comb elastic material which is glued to the rest of the wheel to co-operate with a surface that grips the edges of the bag containing the items to be enclosed. Machine for sealing bags according to any one of claims 1 to 4, each having a contact surface (22, 23) with a contact surface (22, 23). (6) The machine is equipped with a wheel (1
8, 17), a movable carriage (25) and means (+0.11.14) for applying the adhesive tape. A machine for sealing the bags described in any one of paragraphs 1 to 5. (?) A movable carriage (25) and means (10, 11, 14) for applying adhesive tape
A pair? 7. Machine for sealing bags according to claim 6, characterized in that it is operated continuously by a li-l-mi rotary clutch (43) and by one motor (18). (8) characterized in that the operation of said clutch (32, 43) is triggered by a detector (30, 31) that detects the presence or absence of a bag neck in or immediately upstream of the sealing work area; A machine for sealing bags according to claim 7. (8) The bag according to any one of claims 1 to 8, comprising a printing machine (9) for printing information on the non-adhesive surface of the adhesive tape. Seal 11-
A machine that does. (10) the adhesive tape is provided with a plurality of spaced apart pieces of non-adhesive material such as paper to provide tabs at the free end of the adhesive tape knot to facilitate untying; A machine for manufacturing bags according to any one of claims 1 to 9.