JP2000136011A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cope with a change of size of an article such as an article to be packed, in a packaging device provided with a chain conveyer wherein a front hook and a rear hook catching an article such as package box from back-forth in a carrying direction are installed on two parallel conveyer chains respectively. SOLUTION: This device comprises a measurement setting means setting the measurement of spaces between front hooks 53a, 53b, 63, 81 and rear hooks 57a, 57b, 62, 80; a first and a second servomotors 31, 32 driving two conveyer chains respectively; a rotating difference determining means determining the difference in a rotating amount from a datum point of these motors; and a motor control means comparing a measurement set by the measuring means and the difference of the rotating amount determined by the rotating difference determining means, and adjusting a relative velocity of the first and the second servomotors 31, 32 until spaces between the front hooks 53a, 53b, 63, 81 and the rear hooks 57a, 57b, 62 of each conveyer chain A, B, C become the measurements set by the measurement setting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for packaging articles, such as packaging boxes sequentially conveyed on a conveyor and articles to be packed therein.
The present invention relates to a packaging device capable of promptly responding to a change to a different size.

[0002]

2. Description of the Related Art FIG. 8 is a schematic view showing a main part of a conventional packaging apparatus for filling a packaging box (21) conveyed by a packaging box conveyor (1) with an article to be packaged (91). The packaging box conveyor (1) that transports the packaging boxes (21) and (21) to the downstream side (upper right side in the figure) at regular intervals is used to push the packaging boxes (21) and (21) from the rear in the transport direction. A rear nail chain (18a) (18b) to which the rear nail (17a) (17b) is attached is provided, and the rear nail chain (18a) (18b) is connected to the rear nail interlocking sprocket (14a) ( 1
4b) (15a) Hung on (15b). Meanwhile, packaging box (21)
Front claw (27a) that comes into contact with (21) from the front in the transport direction
The front nail chain (28a) (28b) to which 7b) is attached is hung on the front nail sprockets (24a) (24b) (25a) (25b).

The chains (18a) (18b) (28
a) Sprocket for front and rear claws on the drive side of (28b) (25a) (25b)
(15a) and (15b) are driven by a motor (10). The front sprockets (25a) and (25b) can be rotated by the handle (11).
When the front claw sprockets (25a) and (25b) are rotated in (11), the front claw chains (28a) and (28b) hooked on this rotate with the front claws (27a) and (27b), and Claw (17a) (17
b) The distance before and after changes.

In this case, the distance between the rear claws (17a) (17b) and the front claws (27a) (27b) is adjusted by rotating the handle (11).
The width W of (21) is set, and the motor (10) is driven in this state. Then, the packaging boxes (21) and (21) supplied from a packaging box supply device (not shown) include rear claws (17a) (17b) and front claws (27a) (2
It is transported in a state sandwiched by 7b). And packaging box (21)
Is transported to the article filling position, the article to be packaged (91) is pushed into the inside of the packaging box (21) by the pusher (93) from the one end opening.

[0005]

However, in the above-described conventional apparatus, the front claws (27a) (27b) and the rear claws (27a) (27b) are changed so that the objects (91) and (91) to be packaged are changed to those of different sizes. When adjusting the distance between the claws (17a) and (17b), the motor (10) is stopped, and then the operator manually turns the handle (11) to move the front and rear claws (27a) (27b) (17a). Since the interval of (17b) needs to be adjusted to the dimensions of the packaging boxes (21) and (21) that are compatible with the new packaged object (91), there has been a problem that the work of changing the size becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned point, and has been made in consideration of the following problem. A packaging device having a separately attached chain conveyor "is intended to easily cope with a change in the size of an article such as an article to be packaged. * 1

[0007]

The technical means of the present invention for solving the above-mentioned problem will be described with reference to the conceptual diagram of FIG. 1. The technical means of the present invention is as follows. Dimension setting means (41) for the operator to set the dimension of the interval of
And first and second servomotors (31) and (32) for separately driving the two conveyor chains, and rotation of the first and second servomotors (31) and (32) from the origin position. A rotation difference determining means (35) for determining a difference in the amount, and the dimension and the rotation difference determining means (35) set by the dimension setting means (41).
The first and second servo motors are compared until the distance between the front and rear claws of each of the conveyor chains reaches the dimension set by the dimension setting means (41). Motor control means (39) for adjusting the relative speed of (32),
Is provided. "

The above technical means operates as follows. When changing the article to be processed to a different size, the dimension setting means (41) for setting the interval between the front and rear claws respectively attached to the two conveyor chains.
To set the dimensions of the new article. Then, the first and second servo motors (3
The difference in the rotation amount from the origin position in 2) is determined by the rotation difference determination means (35) when the conveyor chain is running or stopped, and the difference between the rotation amount and the dimension set by the dimension setting means is determined by the motor. The comparison is made by the control means (39). When the relative speed of the first and second servomotors (32) is adjusted by the motor control means until the distance between the front and rear claws of each conveyor chain matches the dimension set by the dimension setting means, The distance between the front nail and the rear nail is changed to a dimension suitable for a new article set by the dimension setting means (41).

[0009]

The present invention has the following specific effects. Since the first and second servomotors adjust the distance between the front and rear claws in accordance with the size set by the size setting means (41), it has been necessary to manually adjust the distance between these front and rear claws. The claw interval can be easily changed as compared with the conventional one. Therefore, it is possible to easily cope with a change in the size of an article to be conveyed while being sandwiched between the front and rear claws.

[Others] * 2. In the item of the above item 1, the article is a packaging box having an article filling opening opened to the side of the chain conveyor, and a package to be packed in the packaging box. A second chain conveyor, which is separately attached to two conveyor chains in which a front claw and a rear claw for sandwiching an object from the front and rear in the transport direction are provided in parallel with a side of the chain conveyor. And a first power transmission mechanism for mechanically connecting the conveyor chains having front claws attached to the second chain conveyor and running at the same speed, and a rear portion of the chain conveyor and the second chain conveyor. A second power transmission mechanism that mechanically connects the conveyor chains with the claws attached to each other to travel at the same speed, and opposes the article filling port of the packaging box; That the intended articles to be packaged the pusher is provided with a for pushing "is
Each of the conveyor chains constituting the chain conveyor and the second chain conveyor has a front pawl attached to each other and is mechanically connected via a first power transmission mechanism to run at the same speed, and the other rear pawl is used. Are mechanically connected via a second power transmission mechanism so that they travel at the same speed. Therefore, in this device, it is possible to adjust the distance between the front and rear claws of each chain conveyor that transports the packaging box and the articles to be packed into the packaging box simply by providing a pair of servomotors for driving the front and rear claws. In addition, it is not necessary to separately provide the pair of servomotors on the chain conveyor and the second chain conveyor.

Further, since there is no need to separately provide the pair of servomotors on the chain conveyor and the second chain conveyor, the distance between the front and rear claws, which is out of order when the size of the article to be processed is changed or when a power failure occurs, is returned to an appropriate distance. Even in this case, it is possible to set the front and rear claws of all the chain conveyors to the target intervals simply by controlling the pair of servomotors. Therefore, the pair of servo motors is connected to the chain conveyor and the second
The control for setting the interval between the front and rear claws is simplified as compared with the case where the chain conveyors are separately provided. * 3. In the above item 1 or 2, the item "the dimension setting means"
(41) a dimension input device (42) operated by an operator, a dimension memory group (48) for storing a plurality of dimensions input by the dimension input hand device (42), and a dimension memory group (48). ), The operator selects a specific size from the motor control unit (3).
When the operator inputs a plurality of dimensions in advance using the dimension input device (42), the
Stored in 8). Then, when the operator selects a specific dimension from the plurality of dimensions by the selection means, the dimension is processed by the motor control means (39), and the distance between the front and rear claws is adjusted to the dimension.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the packaging apparatus according to the present embodiment includes a packaging box chain conveyor (A) for transporting packaging boxes (21) and (21), and a packaging box (21) and (21). A guide chain conveyor (B) having guide claws (62) and (63) for guiding the packaged object (91), and a packaged chain conveyor (C) for conveying the packaged object (91); Further, a pusher for pushing the packaged object (91) on the packaged chain conveyor (C) into the packaging boxes (21) (21) through the guide claws (62) (63). (93) The chain conveyor (D) for pushers is provided with (93), and these chain conveyors (A), (B), (C) and (D) run in parallel. One of the chain conveyors (A), (B), and (C) corresponds to the chain conveyor described as the above-mentioned invention specific matter, and the other chain conveyor corresponds to the second chain conveyor. Corresponding.

The details of each section will be described below. [About the chain conveyor for packaging boxes (A)] Packaging boxes (21)
The back nails (57a) and (57b) for the packaging box are pressed at a predetermined pitch. (59a) (59b) (59b) and the drive shaft (30) of the drive side sprocket (59a) (59a) is driven by the first servomotor (31) via the gear (12). It is supposed to be. Also, the front claws (53a) (53) approaching or contacting the packaging boxes (21) (21) from the side opposite to the rear claws (57a) (57b)
b) The chain for front pawls (54a) (54b), which is a conveyor chain attached at a specified pitch, is a sprocket (55a) (55
a) (55b) The drive shaft (50) of the drive-side sprocket (55a) (55a) is driven by the second servomotor (32) via the gear (51) while being hung on (55b). It has become.

The driven sprocket (55b) (55b) (5
9b) (59b) are both bearings (19)
It is rotatably mounted at (19). Therefore, the chain for the rear claw (58a) (58b) and the chain for the front claw (54a) (54b)
Are configured to be able to travel independently in a state parallel to each other. The first and second servomotors (31) and (32) have drive shafts (30) and (50) which are rotated by the first and second servomotors (31) and (32). A second drive sprocket (60) (61) is mounted, and a transmission chain (63) (64) is provided for the first and second drive sprockets (60) (61).
First and second driven sprockets (65) (6)
In the vicinity of the output ends of the first and second transmission shafts (67) and (68) having the input end (6), a plurality of sprockets (79) (84) (90) for driving the guide chain conveyor (B) and the like. ) (87) and (78) are provided. [About the chain conveyor for guide (B)] The chain conveyor for guide (B) running in parallel to the side of the chain conveyor for packaging box (A) is two conveyor chains provided independently of each other. Chain for barrel hook
(73) and a chain for a rear claw (72). These front and rear pawl chains (73) (72) are sprockets (75) (75) (76) (7
6), and a plurality of guide front claws (63) (63) are attached to the front claw chain (73) at a predetermined pitch. Also, a plurality of guide rear claws (62) (62) are attached at a predetermined pitch to the rear claw chain (72), whereby a plurality of guide rear claws are attached to the guide chain conveyor (B). (62) and the guide front claws (63) are alternately arranged. In FIG. 2, the front and rear claws (62) (6
3) is expressed one by one, and the front and rear claws for other guides
(62) and (63) are omitted.

The sprockets (75) and (75) corresponding to the front pawl chain (73) and the sprockets (76) and (76) corresponding to the rear pawl chain (72) are supported so that they can rotate independently of each other. 7
0) (71) is attached via a bearing,
The front pawl chain (73) is driven by the engagement of the front pawl interlocking sprocket (79) fixed to the second transmission shaft (68). Therefore, the second servo motor (3
Rotation of 2) is performed by gear (52) → drive shaft (50) → sprocket (55
a) → Chain for front nail of chain conveyor (A) for packaging box
(54a) and (54b).
(54a) (54b) not only travels with the front claws (53a) (53b) for the packaging box, but also the rotation of the second servomotor (32)
Gear (52) → Drive shaft (50) → Second drive sprocket (61) at the end of drive shaft (50) → Transmission chain (650) → Second driven sprocket (66) → Second transmission shaft (68) → Front pawl Interlocking sprocket (7
9) → Guide chain (B)
3), and the chain (73) for the front pawl is moved to the front pawl (6
Drive with 3). That is, a chain conveyor for packaging boxes
(A) and the front pawl chain (7a) provided on the guide chain conveyor (B).
3) is the second drive sprocket (61) and the transmission chain (6
50), the second driven sprocket (66), the second transmission shaft (68), and the front pawl interlocking sprocket (79).

On the other hand, the rear pawl chain (72) hung on the guide chain conveyor (B) is connected to the first transmission shaft (67).
The gear is driven by meshing with a rear claw interlocking sprocket (78) fixed to the gear. Therefore, the rotation of the first servomotor (31) is transmitted to the gear (12) → the drive shaft (30) → the sprocket (59a) → the chain for the rear claws (58a) (58b) of the chain conveyor (A) for the packaging box. The chain for the back nail (5
8a) (58b) not only travels with the rear claws (57a) (57b), but also the rotation of the first servomotor (31)
Drive shaft (30) → First drive sprocket (6
0) → transmission chain (64) → 1st driven sprocket (65) → 1st transmission shaft (67) → rear jaw interlocking sprocket (78) → chain (72) for rear jaw of guide chain conveyor (B) The chain (72) for the rear nail is transmitted to the rear nail (62) for the guide.
Travel with. That is, a chain conveyor for packaging boxes (A)
The rear pawls (57a) and (57b) provided on the guide chain conveyor (B) provided on the first driving sprocket (60), the transmission chain (64), The driven sprocket (65), the first transmission shaft (67), and the rear pawl interlocking sprocket (78) are in a state of being mechanically connected.

The guide chain conveyor (B) has a structure as shown in FIG. That is, small rectangular plates (721), (721), (731), and (731) are separately provided on the upper surface of the chain for rear claws (72) and the chain for front claws (73), respectively. The guide back nail (62) and the guide front nail (63) are separately fixed to (731). Therefore, a chain (72) for a rear claw having a rectangular plate (721) (721),
When the front claw chain (73) including the rectangular plates (731) (731) relatively moves, the chain is fixed to the guide rear claws (62) fixed to the rectangular plate (721) and the rectangular plate (731). Guide for front claw (6
The interval W in 3) changes. [About the chain conveyor for packaged goods (C)] The chain conveyor for packaged goods (C) running in parallel to the side of the above-mentioned chain conveyor for guides (B) is a two-piece chain conveyor that is provided so as to be able to run independently of each other. And a chain for front claws (83) and a chain for rear claws (82). These front and rear pawl chains (83) (82) are sprockets (85) (85) (8
6) A chain for the front claw, which is hung separately on (86)
A plurality of front claws (81) and (81) are attached to (83) at a predetermined pitch. Also, the back nail chain (82) has multiple back nails (8
0) and (80) are attached at a predetermined pitch, so that a plurality of rear claws (80)
And the front claws (81) are alternately arranged.

A sprocket for the chain (83) for the front claws.
(85) (85) and the sprocket (8) for the rear claw chain (82)
6) (86) is attached to the support shafts (88) (89) via bearings so that they can rotate independently of each other, and the chain (83) for the front pawl hooked on the sprockets (85) (85) Is a sprocket (84) for linking the front pawl fixed to the second transmission shaft (68) described above.
And are driven. Accordingly, the rotation of the second servomotor (32) is transmitted from the front-claw interlocking sprocket (84) at the output end of the second servomotor (32) via the second transmission shaft (68) similarly to the above-described guide chain conveyor (B). Chains (8
3), and the chain (83) for the front claws travels together with the front claws (81) and (81).

On the other hand, the rear pawl chain (82) hung on the sprockets (86) (86) is driven by meshing with the rear pawl interlocking sprocket (87) fixed to the first transmission shaft (67). It is supposed to be. Therefore, the first servo motor (3
The rotation of 1) is carried out from the rear pawl interlocking sprocket (87) near the output end to the rear pawl chain (82) via the first transmission shaft (67) in the same manner as the guide chain conveyor (B). The transmission is performed, and the chain for the rear claw (82) runs along with the rear claw (80) (80).

Therefore, in the packaging apparatus according to the present embodiment, the front claws (53a) (53b) of the chain conveyor (A) for the packaging box, the chain conveyor (B) for the guide, and the chain conveyor (C) for the article to be packaged. ) Front chain with (63) and (81)
(54a) (54b) (73) (83) are connected to each other by a drive shaft (50) as a first power transmission mechanism, a second drive sprocket (61), and a transmission chain (65).
0), the second driven sprocket (66), the second transmission shaft (68), and the front pawl interlocking sprockets (79) and (84). Also, each chain conveyor (A) (B) (C)
The rear pawl chain (58a) (58b) (58b) (72) (82) with the rear pawls (57a) (57b) (62) (80) attached to each other is connected to the drive shaft (30 ), First drive sprocket (60),
The transmission chain (64), the first driven sprocket (65), the first transmission shaft (67), and the rear pawl interlocking sprockets (78) and (87) are connected in a power transmission state. [About the chain conveyor for pushers (D)] The chain conveyor for pushers (D) for pushers that runs in parallel to the side of the above-mentioned chain conveyor for packages (C).
Are equipped with conveyor chains (95) and (95) that run integrally with each other, and the conveyor chains (95) and (95) have pushers (93).
(93) are mounted at a predetermined pitch. The conveyor chain (95) is configured to be driven by a propet (90) fixed to one end of the first transmission shaft (67). [Control device] The first and second servo motors (31)
(32), pushers (93), (93) and the like are controlled by the control device (4) of FIG. 4 including a servo motor controller and a microcomputer (may be a sequencer).

The input part of the control device (4) includes an operation switch (40) to be inserted when starting the packaging operation and dimensions of a plurality of types of articles to be packaged (each front claw (53a) (53b) (63) ) (81) and a dimension input device (42) which is operated when the back nails (57a) (57b) (corresponding to the interval dimension between (62) and (80)) are set in advance, and the dimension input device (42) A size selection knob (43), which is a selection means for selecting a specific dimension from a plurality of dimensions set in the above, is further connected to a size change button (44) to be input when the size of the packaged object is changed. I have.

The output of the control device (4) has front claws (53a), (53b), (63), and (81) of each chain so as to match the size selected by the size selection knob (43). Back nail (57a) (57
b) The adjustment completion lamps (45) and (45) that light when the interval adjustment of (62) and (80) are completed are connected. Also, the items to be packaged (9
1) Filling port (211) at one end of packaging box (21) (see Fig. 7)
Pushers (93) (93) to be pushed in and drivers (310) (320) for the first and second servomotors (31) (32) are connected. [Control operation] Before the operation of the packaging apparatus, dimensions of a plurality of types of articles to be packaged are set in advance. That is, the alignment display (46) displayed on the size selection knob (43) is matched with the first scale (47) on the left end of the outer periphery, and in this state, the dimensions of the specific type of packaged object are inputted. Set with (42). Then, the dimensions are stored in the first memory of the dimension memory group (48) of the microcomputer or the servo motor controller constituting the control device (4). When the size setting operation by the size input device (42) is repeated while rotating the size selection knob (43) by one division, a plurality of types (five types in this embodiment) of sizes are stored in the size memory group (48). Is stored.

Next, the actual packaging operation will be described. The control device (4) executes the control operation shown in the flowchart of FIG. In step (ST1), it is monitored that the operation switch (40) is turned on, and when the operation switch (40) is turned on, the dimensions of the specific type of package selected by the size selection knob (43) are reduced. The selected size is selected from the memory group (48) and stored again as the set dimension L (step (ST2)). Accordingly, in the present embodiment, a combination of the size selection knob (43), a dimension memory group (48) for storing dimensions to be selected with the size selection knob (43), and a dimension input device (42) operated when further inputting the dimensions. Corresponds to the dimension setting means (41) which is the above-mentioned invention specifying matter.

Next, the difference between the rotation amount of the first servomotor (31) from the home position and the rotation amount of the second servomotor (32) from the home position is calculated, and the difference between the rotation amounts is calculated. Multiply the conversion constant k and measure the distance between the front and rear jaws (63) of the guide chain conveyor (B) and the rear jaws (62) of the guide (the front and rear claws (81) of the chain conveyor for packaged goods (C)). (K × (second servo motor (32))
Of the first servo motor (31) from the origin position) is smaller than the set dimension L (step (ST3)). In addition, the amount of rotation of the first and second servomotors (31) and (32) from the home position, that is, for example, at the start of operation, the guide front claw (63) and the guide rear claw (63) of the guide chain conveyor (B) The first and second servomotors (31) measured from the position where the front-rear distance of 62) (same as the distance between the front and rear claws (81) and (80) of the chain conveyor for packaging (C)) is set to "0". The rotation angle data and number of rotations in (32) are
The controller (4) is constantly monitoring and calculates the above-mentioned front and rear claw intervals by using the rotation angle data and the like. The distance between the front claws (53a) (53b) and the rear claws (57a) (57b) for the chain conveyor (A) for the packaging box is determined by the distance between the front claws (63) and the rear claws (62). It is configured to be slightly larger than the front-back distance. The dimensions of the packaging box (21) sandwiched between the front claws (53a) (53b) and the rear claws (57a) (57b) provided on the packaging box chain conveyor (A) are slightly smaller than the dimensions of the item (91). Because it is big.

Then, the guide front claws (63) and the front claws (8
When the distance between the front and rear guide claws (62) and the rear claws (80) is smaller than the set dimension L, the first distance is set until they match.
Reverse the servo motor (31) (Step (ST4)-(ST
6)). That is, in order to adjust the relative speeds of the first and second servomotors (31) and (32), the second servomotor (32) is stopped in a state in which 1) Servo motor (31) is rotated, and thereby, the chain for the rear nail of each chain conveyor (A) (B) (C) (58a) (58b) (72)
By moving (82), the back claws (57a), (57b), (62), and (80) are separated from the front claws (53a), (53b), (63), and (81). On the other hand, if the front-rear spacing between the front claws (63) (81) and the rear claws (62) (80) of the guide chain conveyor (B) and the packaged conveyor (C) is larger than the set dimension L, Rotate the first servomotor (31) forward until these dimensions match (step
(ST7) (ST8) (ST5) (ST6)). Therefore, in the present embodiment, in steps (ST3) and (ST7), the first and second servo motors (3
1) A control device that calculates the difference in the amount of rotation from the home position in (32)
The functional section (4) corresponds to the rotation difference determining means (35) which is the invention-specifying matter of the above-mentioned item 1. Also, the part that executes the control of steps (ST4) and (ST8) corresponds to the motor control means (39) which is the invention specifying matter of the above-mentioned item 1.

By rotating the first servomotor (31) forward or backward in this way, the front claws (63) of the guide chain conveyor (B) and the packaged chain conveyor (C) are rotated.
(81) and the distance between the front and rear claws (62) and (80) are adjusted to the dimensions of the packaged object (91) to be processed, and the front claws (53a) and (53b) of the chain conveyor (A) for the packaging box. Adjust the distance between the back claws (57a) and (57b) to a value suitable for the dimensions of the packaging box (21).
Thereby, the front claws (63) (81) (53a) and the rear claws (62) (80) (57b) according to the size of the article to be processed (91) or the packaging box (21). Are adjusted, thereby completing the initial setting operation.

Next, in step (ST9), the first and second servo motors (31) and (32) are rotated synchronously. Then, each back claw (57a) (57b) (62) (80) of each chain conveyor (A) (B) (C)
Chains (58a) (58b) (72) and (82) are driven by the first servomotor (31), while the front claws (53a) (53b) (6
3) Chain for front claw for (81) (54a) (54b) (73) (83)
Driven by a servomotor (32). The pusher chain conveyor (D) is driven by a first servomotor (31). As a result, each chain conveyor (A) (B) (C) (D)
Runs at the same speed.

Then, the packaging box (21) (21) () supplied between the front claws (53a) and (53b) and the rear claws (57a) and (57b) of the packaging box chain conveyor (A) from a packaging box supply device (not shown). 21), and the packages (91) and (91) supplied between the front claws (81) and the rear claws (80) of the chain conveyor for packaged products (C) from a package supply device (not shown), The paper is conveyed in the upper right direction in FIG. 2 while being loosely sandwiched by the front and rear claws.

Next, in step (ST10), it waits until the first servomotor (31) rotates by an amount corresponding to one pitch of the packaging boxes (21) and (21) and the packages (91) and (91). Each time the first servo motor (31) rotates by an amount corresponding to the one pitch, the pusher (93) is operated. That is, as shown in FIG. 6, a packaging box (21) conveyed by a packaging box chain conveyor (A),
Packaged items conveyed by the chain conveyor for packaged items (C)
When the passageway (S) between the front and rear claws (62) and (63) of the guide chain conveyor (B) positioned between them (91) and the guide chain conveyor (B) is arranged in a line, the corresponding pusher (93) ) Advances, and the object to be packaged (91) is moved by the pusher (93) into the packaging box (21) in front of the packaged object (91).
Is pushed into. At this time, the flap (210) extending from the periphery of the opening end of the packaging box (21) formed in a rectangular cylindrical shape
(210) (see FIG. 7) is held open by the front guide pawl (63) and the rear guide pawl (62) of the guide chain conveyor (B), as shown by the imaginary line in FIG. This allows the flap (21) to be filled when the packaged object (91) is filled in the packaging box (21).
0) Prevent (210) from becoming an obstacle. Incidentally, when the packaging box (21) is conveyed to the upstream end of the guide chain conveyor (B), the flaps (210) and (210) are appropriately moved by the guide front claw (63) and the guide rear claw (63). The claw (62) is bent outside.

Next, a description will be given of a control operation when the size of the article to be packaged is changed during the packaging. When changing the size of the packaged item (91), the supply of the packaging box (21) or the packaged item (91) from the packaging box supply device or the packaged item supply device (not shown) is temporarily stopped. , Each chain conveyor
Put (A), (B), (C), and (D) in idle operation.

In this state, a new size to be changed is selected with the size selection knob (43), and a size change button is set.
When (44) is input (step (ST12)), the dimension in the dimension memory group (48) corresponding to the selected size is stored again as a new set dimension L. Next, the first servo motor
The difference between the rotation amount from the origin position of (31) and the rotation amount of the second servomotor (32) from the origin position is calculated, and the difference between the rotation amounts is multiplied by the conversion constant k to calculate the front claw (63). ) (81) and back nail (6
2) The value (k · (the rotation amount of the second servomotor (32) from the home position) −the rotation amount of the first servomotor (31) from the home position) converted into the dimension of the front-back distance of (80) is It is determined whether or not it is smaller than the set dimension L (step (ST13)).
If the front-rear spacing between the front claws (63) (81) and the rear claws (62) (80) is smaller than the set dimension L, the first servomotor (31) is decelerated until they match (step (ST14)). ~ (ST1
Five)). That is, the rotational speed of the first servomotor (31) is reduced in order to adjust the relative speeds of the first and second servomotors (31) and (32) as described in the item 1 of the invention, and As a result, the running speed of the chain for the rear pawls (58a) (58b) (72) (82) of each chain conveyor (A) (B) (C) is reduced so that each rear pawl (57a) (57b) (62) ) (80) to each front nail (53a) (53b) (63)
Separated from (81). On the other hand, front nail (63) (81) and rear nail (62)
If the front-back distance of (80) is larger than the set dimension L, the rotation speed of the first servomotor (31) is increased until these dimensions match (steps (ST17), (ST18), (ST15)). Therefore, in the present embodiment, the steps (ST13) and (ST17)
The functional unit of the control device (4) for calculating the difference between the rotation amounts of the second servomotors (31) and (32) from the home position is also described in the step (ST3).
As in the case of (ST7), it corresponds to the rotation difference determination means (35). Further, the part for executing the control of steps (ST14) (ST18) also corresponds to the motor control means (39) as in the case of steps (ST4) and (ST8) described above.

By increasing or decreasing the rotation speed of the first servomotor (31) in this manner, the front claws (63) of the guide chain conveyor (B) and the packaged chain conveyor (C) are increased.
(81) and the distance between the front and rear claws (62) and (80) are adjusted to the dimensions of the package to be processed, and the front claws (53a) and (53b) and the rear claws (53a) of the chain conveyor (A) for packaging boxes are used. 57a) When the work to adjust the front-back distance of (57b) to a value suitable for the dimensions of the packaging box (21) is completed, a specific adjustment completion lamp (43) corresponding to the size selected with the size selection knob (43) described above 45) lights up (step (ST16)).

Thereafter, the control operation is returned to the step (ST9) of synchronously rotating the first and second servomotors (31) and (32), and a new size of packaging is supplied from a packaging box supply device or an article supply device (not shown). The box (21) and the packaged item (91) are supplied to the packaging box chain conveyor (A) and the packaged item chain conveyor (C), and the above-described packaging operation is restarted. In the above embodiment, each front claw (53a) (53b) (63) (8
Although the front and rear distances between 1) and the rear claws (57a) (57b) (62) (80) have been adjusted, the above adjustment may be performed by rotating the second servomotor (32) forward / reverse or increasing / decelerating. .

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of the present invention.

FIG. 2 is a schematic perspective view of a configuration of a packaging device according to an embodiment of the present invention.

FIG. 3 is a perspective view of a main part of a guide chain conveyor (B).

FIG. 4 is an explanatory view showing a connection mode of an electric component.

FIG. 5 is an explanatory diagram of a control operation.

FIG. 6 is an explanatory diagram of a packaging operation.

FIG. 7 is a perspective view of a packaging box (21).

FIG. 8 is an explanatory view of a conventional example.

[Explanation of symbols]

 (21) ・ ・ ・ Packing box (31) ・ ・ ・ First servo motor (32) ・ ・ ・ Second servo motor (39) ・ ・ ・ Motor control means (41) ・ ・ ・ Dimension setting means (53a) ( 53b) ・ ・ ・ Front claw (57a) (57b) ・ ・ ・ Back claw (62) ・ ・ ・ Guide back claw (63) ・ ・ ・ Guide front claw (80) ・ ・ ・ Back claw (81) ・・ ・ Front claw (91) ・ ・ ・ Packed object (A) ・ ・ ・ Chain conveyor for packaging box (B) ・ ・ ・ Chain conveyor for guide (C) ・ ・ ・ Chain conveyor for packaged object (D) ・..Chain conveyors for pushers

Claims (3)

[Claims] 1. A packaging apparatus comprising a chain conveyor in which front and rear claws sandwiching an article such as a packaging box to be conveyed from front and rear in a conveying direction are respectively attached to two conveyor chains in parallel. A dimension setting means (41) for an operator to set the dimension of the interval between the front nail and the rear nail, and first and second servo motors (31) (31) (31) for separately driving the two conveyor chains. 32) a rotation difference determining means (35) for determining a difference between the rotation amounts of the first servomotor (31) and the second servomotor (32) from the origin position.
Comparing the difference between the size set by the size setting means (41) and the rotation amount determined by the rotation difference determination means (35) to determine the distance between the front and rear claws of each of the conveyor chains. A motor control means (39) for adjusting a relative speed of the first and second servomotors (32) until the dimension is set by the dimension setting means (41). 2. The article according to claim 1, wherein the article is a packaging box having an article filling port opened toward the side of the chain conveyor, and the article to be packed in the packaging box is transported in a conveying direction. A second chain conveyor attached separately to two conveyor chains in which a front claw and a rear claw sandwiched from front and rear are arranged side by side is provided in parallel with a side of the chain conveyor, and the chain conveyor and the second chain are provided. A first power transmission mechanism for mechanically connecting conveyor chains each having a front claw mounted on the conveyor and running at the same speed; and a rear claw mounted on the chain conveyor and the second chain conveyor. A second power transmission mechanism that mechanically connects the conveyor chains to run at the same speed; and the packaged object facing the article filling port of the packaging box. Packaging device was equipped with a pusher for pushing. 3. The apparatus according to claim 1, wherein said dimension setting means includes a dimension input device operated by an operator and said dimension input device.
Dimension memory group that stores multiple dimensions entered in (42)
(48), and selecting means for the operator to select a specific dimension from the dimension memory group (48), wherein the specific dimension selected by the selecting means is processed by the motor control means (39). Packaging equipment.