JP2000255513A - Carton open and transport equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide carton open and transport equipment which does not scratch the carton when opening and shaping the carton for opening a flatly folded carton in a prismatic shape with a rectangular cross section. SOLUTION: This equipment is provided with first and second sucking means for sucking separately a pair of outside faces facing opposite direction to each other of a flatly folded carton 21, a means for working the first and second sucking means until the carton 21 is folded in the opposite direction forming a reversely arranged condition from an initially folded condition passing an open condition with a rectangular cross section, a means for placing the carton 21 between a pair of parallel first and second conveyors while keeping the carton 21 in the reversely arranged condition, and a front tab 31 and a back tab 41 touching separately to the front and back face of the carton 21 in its transport direction for receiving the same elastically when the same is restored elastically in the opening condition with a rectangular cross section in the first and second conveyors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton opening transfer apparatus for opening a carton folded in a flat state into a rectangular tube and transferring the carton to a subsequent processing section.

[0002]

2. Description of the Related Art FIG. 6 is a schematic view of a conventional carton opening transfer device. A rotating disk (13) is provided at a position facing the carton outlet (10) of the carton storage case (11) for storing the cartons (21) folded in a flat state in a stacked state. A carton (2
1) Carton adsorbent (17) for holding by suction
It is mounted so that it can rotate freely. In addition, the carton adsorbent (17) rotates its rotating shaft (12) with the rotation of the rotating disc (13).
While revolving around the shaft, the shaft support (1
It can be rotated around 8).

[0003] Below the rotating disk (13), a carton conveyor composed of parallel first and second conveyors (32) and (42).
(4) is provided, and the first and second conveyors are provided.
The front claws (31) and the rear claws (41) are provided separately in (32) and (42). Also, below the rotating disk (13) and the second conveyor (42)
A shaping guide (24) is fixed at a position corresponding to the vicinity of the upstream end of the second conveyor (42), and the upper and lower ends of the second conveyor (42) move in the running direction of the second conveyor (42). Carton presser (25) is provided.

In this case, a rotating disk (13) shown in FIG.
When rotated in the counterclockwise direction, the carton adsorbent (17) moves together with the rotating disk (13) while rotating clockwise around the shaft support (18) with this, and during this movement, Is
The suction head (15) of the carton adsorbent (17) is pressed against the lowermost carton (21) in the carton storage case (11). Then, when the suction head (15) is pressed against the carton (21), a vacuum device (not shown) operates to operate the suction head.
The inside of (15) is maintained at a negative pressure, whereby the carton (2
1) is sucked and held by the carton adsorbent (17) and is taken out of the carton storage case (11). And the carton (2
The carton conveyor (1) moves while being swung while being sucked and held by the carton adsorbent (17) revolving around the rotating shaft (12) while rotating around the shaft support (18).
It is transported above the carton receiving part (40) at the upstream end of (4).

When the carton (21) is transported to a position above the carton receiving portion (40), the lower end of the folded carton (21) collides with the front edge of the shaping guide (24) and is pressed. The carton (21) is opened like a parallelogram square tube. Thereafter, the lower edge of the rear end of the carton (21) is pushed forward by the rear claw (41) of the second conveyor (42), and
The upper edge of the tip of (21) is received by the front claws (31) of the first conveyor (32) (in this state, the carton presser (25) which advances in the traveling direction of the carton conveyor (4) is placed on the upper surface of the carton (21). In this state, the carton (21) is transferred downstream by the carton conveyor (4).

[0006]

SUMMARY OF THE INVENTION In the above prior art,
Insert one end of the folded carton (21) into the shaping guide (2
Press on 4) to open it. Therefore, when the carton (21) collides with the shaping guide (24) at high speed in order to increase the processing capacity, there is a concern that a dent is formed in the collision portion of the carton (21), and it is difficult to increase the processing capacity. It is.

[0007] The present invention has been made in view of the above points,
`` It has a carton opening device for opening a flat folded carton (21) in a rectangular tube shape with a rectangular cross section, and first and second conveyors (32) and (42) opposed to each other with a transfer surface in parallel and A carton conveyor in which a plurality of front claws (31) and rear claws (41) deviated in the traveling direction of the conveyor are separately provided on each of the traveling surfaces.
(4), wherein the tip of the rear claw (41) located in the most upstream portion in the protruding direction and the first conveyor (3) are provided.
The interval height in the projecting direction with respect to the transfer surface in 2) is a carton insertion portion of the carton (21) into the carton conveyor, and the interval height in the carton (21) opened in a rectangular cross section. In the carton opening transfer device in which the carton width in the direction of the length is larger than the gap height, it is an object of the present invention to prevent the carton (21) from being damaged during the shaping of the opening. <Item 1>

[0008]

Means for Solving the Problems] technical means of the present invention for Ru solve the above problems, "said carton opening device, a pair of opposing side of the carton is folded into a flat state (21)
A first suction unit and a second suction unit for separately suctioning the outer surface of the face plate , and a suction position of the first suction unit and a suction position of the second suction unit with respect to the carton (21) are determined by the carton (2).
An adsorbing means driving device for relatively moving the first adsorbing means and the second adsorbing means along a trajectory relatively moving along with the opening of 1), wherein the carton (21) has a rectangular cross section from an initial folded state; Control means for operating the suction means driving device until the carton width is smaller than the gap height by being folded back in a reverse direction beyond the opening state of the carton (21); Inserting means for inserting into the carton conveyor (4) from the gap height while holding in the reverse molded state and releasing the holding after the insertion, and wherein the holding is released when the holding is released. When the carton (21) is elastically restored to the open state of the rectangular cross section, the front claws (3) are provided on the front and rear surfaces in the transfer direction of the carton (21) so as to receive the elastic force.
1) and the rear claws (41) abut separately. "

The above technical means works as follows. The outer surfaces of the pair of opposed side plates of the carton (21) folded in a flat state are separately suctioned by the first suction means and the second suction means, and the suction means driving device is operated in this state. That is,
The first suction means and the second suction means are relatively moved so that the suction positions of the first and second suction means with respect to the carton (21) follow a locus which moves relatively with the opening of the carton (21). Let it. Accordingly, when the carton (21) is opened, the outer surface of the carton (21) does not relatively slide with the suction portions of the first and second suction means.

Then, the carton (21) adsorbed by the first and second adsorbing means is folded back in the opposite direction beyond the open state of the rectangular cross section from the initial folded state (hereinafter referred to as the "reverse shaping state"). ) Is operated until the suction device driving device operates. In this reverse shaping state, the width of the carton in the interval direction between the first and second conveyors (32) and (42) is the same as the distance between the leading end of the rear claw (41) in the projecting direction and the transfer surface of the first conveyor (32). Direction is smaller than the height of the gap. That is, the carton (21) in the reverse shaped state is the carton conveyor (4).
The carton (21) is slightly flattened to a carton width that can be inserted at the above-mentioned interval height for inserting the carton (21).

Therefore, when the insertion means is operated in this state, the carton (21) in the reversely shaped state is inserted into the carton conveyor (4) from the above-mentioned spacing height, and the carton (2) is inserted after the insertion.
When the holding of 1) is released, the carton (21) tries to restore the initial folded shape by the elastic return force. Then
Front pawl protruding from the transfer surface of the first and second conveyors (32) and (42)
(31) and the rear claw (41) abut against the front and rear surfaces in the transport direction of the carton (21) so as to receive the elastic force of the carton (21), whereby the carton (21) opened in a rectangular cross section. Is set in the carton conveyor (4). Thereafter, the opened carton (21) is transferred to the downstream side by the carton conveyor (4).

[0012]

The present invention has the following specific effects. By opening the carton (21) to the above-described reverse shaping state by separating the pair of side plates facing each other of the carton (21) folded in a flat state while being suctioned by the first and second suction means, Supply to conveyor (4). Therefore, unlike the above-described conventional one in which the tip of the flatly folded carton (21) may collide with the shaping guide (24) and cause a collision scratch, when opening the carton (21), Carton (21)
There is no inconvenience that will hurt. <Claim 2> In the above-mentioned item 1, it is provided that "conveyor control means for driving the carton conveyor (4) after stopping the carton conveyor (4) until the insertion means releases the holding" is provided. ), The carton (21) is inserted into the stopped carton conveyor (4), so that the insertion speed of the carton (21) by the insertion means and the carton conveyor
The complicated control for matching the speed of (4) becomes unnecessary. <Item 3> In the above item 1 or 2, the movement locus of the first suction means and the second suction means relative to each other when opening the carton (21) until the reverse shaping state is achieved. The specific shape may be “set in an arc shape”.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. As shown in FIG. 1, the carton opening transfer device according to the present embodiment comprises a carton opening device (6) for separating upper and lower surfaces of a carton (21) in a folded state and opening the carton (21); It has a carton conveyor (4) which is supplied with a carton (21) from the device (6). Hereinafter, details of each unit will be described. [Regarding Carton Opening Apparatus (6)] As shown in FIG. 2, the carton opening apparatus (6) includes a bottom suction head (71) corresponding to the first suction means or the second suction means described above, and a carton conveyor (4). A lower drive mechanism (7) for moving in the vertical direction perpendicular to the horizontal direction which is the traveling direction of the upper suction head (81) located above the bottom suction head (71) (the second suction means or the second suction means described above). An upper drive mechanism (8) for reciprocating the first suction means (corresponding to the first suction means) along an arc-shaped locus is provided. And
The lower drive mechanism (7) and the upper drive mechanism (8) correspond to the suction device driving device as the above-mentioned item 1 specifying the invention.

* Lower drive mechanism (7) The lower drive mechanism (7) has a suction pipe (72) provided with a bottom suction head (71) at the upper end, and the lower side of the suction pipe (72) shown in FIG. A slide shaft (74) protrudes from the back side of the drawing, and the slide shaft (74) is slidably inserted into a guide groove (76) formed along the horizontal bar (75). . The suction pipe (72) is inserted so as to be slidable up and down with respect to the holding cylinder (77), and the holding cylinder (77) is formed on a horizontally extending fixed rail (78). (Five
It is slidable guided by 1). The output end of a rod (79) is rotatably connected to the holding cylinder (77) by a support shaft (61), and is implanted on a side wall near the input end of the rod (79). The sliding pin (62) is slidably inserted into a long hole (64) formed in the L-shaped swing arm (63). The L-shaped bent portion of the swing arm (63) is supported by a support shaft (65) so as to be swingable with respect to the fixed portion, and is implanted near the input end of the swing arm (63). Driven shaft (66)
It is inserted into the cam groove (68) of the cam plate (67). Also, cam plate
(67) is adapted to be rotated by a servomotor (69) for horizontal movement.

The above-mentioned horizontal bar (75) is adapted to move up and down along the guide shafts (53) and (53) hanging from the fixed plate (50) while maintaining the horizontal attitude, and to move up and down. ), The output end of the connecting plate (55) is rotatably connected to the shaft (54). A swing arm (57) rotatably connected to the input end of the connecting plate (55) by a shaft (56) is supported by a cam plate (58).
(59) is used as a fulcrum. For this reason, the driven shaft (52) implanted in the central portion in the longitudinal direction of the swing arm (57) is provided with a cam groove formed on a cam plate (58) rotated by the elevation drive motor (27). It is slidably inserted in (26).

The inside of the suction pipe (72) having the bottom suction head (71) is maintained at a negative pressure as required by a vacuum device (not shown). 72) Bottom suction head (7
By 1), a carton (21) described later can be adsorbed. * About upper drive mechanism (8) The upper drive mechanism (8) is formed in the shape of a four-bar link, and a suction pipe (85) hangs down from the horizontal bar (83) constituting the four-bar link. An upper suction head (81) is connected to a lower end of the suction pipe (85). Incidentally, the inside of the suction pipe (85) having the upper suction head (81) is maintained at a negative pressure state by a vacuum device as necessary, so that the inside of the suction pipe (85) communicates with the inside of the suction pipe (85). The carton (21) described later can be suctioned by the upper suction head (81).

The horizontal bar (83) is provided with an L-shaped carton guide (86) located in front of the suction pipe (85), and the carton guide (86) is separated from the horizontal bar (83). It comprises a hanging support leg (87) and a horizontal plate (88) extending horizontally from its lower end. The upper drive mechanism (8)
It is driven by an opening cylinder (80), so that the rod (82) of the opening cylinder (80) is connected to a connecting pin (8).
It is connected to the rotating rod (89) at 4). [About Carton Conveyor (4)] Carton Conveyor
(4) includes first and second conveyors (32) and (42) vertically opposed to each other with the transfer surfaces (320) and (420) in parallel with each other,
As shown in FIG. 4, the first conveyors (32) (32) run side by side at intervals in the horizontal direction. Also, the other second conveyor (4
2) (42) also runs side by side with a horizontal gap.

Each of the first and second conveyors (32, 42) includes timing belts (33, 43) and gears (34, 44) for driving them. Transfer surface (320) of the timing belt (33)
The front claws (31), (31) are arranged at a pitch larger than the width of the opened carton (21) in the transport direction. Also, on the transfer surface of the timing belt (43), the rear claws (41) and (41) are arranged in a mode shifted from the front claws (31) and (31) by a half pitch,
The horizontal distance between the front claws (31) and the rear claws (41) is the width A (FIG. 1) in the transport direction of the carton (21) having a rectangular cross section.
See). Then, as shown in FIG. 4, the pair of bottom suction heads (71) move up and down between the second conveyors (42) and (42), and the cartons (2) are moved to the second conveyors (42) and (42).
In the state where both ends of 1) are placed, the carton (21) is transferred to the downstream side with the front and rear surfaces sandwiched by the front and rear claws (31) and (41) in the transfer direction. It has become.

A conveyor servomotor (46) for driving the carton conveyor (4), a lifting / lowering drive servomotor (27) as a drive source of the lower drive mechanism (7), a horizontal movement servomotor (69), and The opening cylinder (80), etc., which is the drive source of the upper drive mechanism (8), is shown in FIG. 5 based on the signal of the carton sensor (47) for detecting the tip of the carton (21) entering the carton conveyor (4). Is controlled as follows. The carton sensor (47) is provided at a distance between the front end of the rear claw (41) located at the upstream end of the carton conveyor (4) in the projecting direction and the transfer surface of the first conveyor (32) in the projecting direction. Are provided at the lower part of the carton receiving portion (40). For this reason, the conveyor servomotor (46) and the like are controlled by a control device (not shown) including a microcomputer in which a control program shown in the flowchart of FIG. 5 is stored.

The carton (21) to be processed by the carton opening transfer device according to the present embodiment is opened in the shape of a rectangular tube having a rectangular end surface, and each ridgeline is opened in the state of being opened in the rectangular tube. The folded portions (211) to (214) (see FIG. 1) are formed with folds in advance. [Control Operation] Next, the operation of the carton opening transfer device will be described with reference to FIG.

When an operation switch (not shown) is turned on,
Initial setting is performed in step (ST1). That is, by contracting the opening cylinder (80), the horizontal bar (83) of the upper drive mechanism (8) is raised to raise the upper suction head (81) to the highest position, and the bottom suction head (71). To the lowest position, and further, the bottom suction head (71) is fixed to the fixing plate (5).
Retract to the position closest to 0). Next, the carton (21) is fixed to the fixing plate by operating a carton feeding device (not shown).
(50) Supply the carton opening device (6) from above (Step
(ST2)). Then, in step (ST3), the bottom suction head (7
1) is raised to the suction position. The carton (21) on the fixing plate (50) is attached to the bottom suction head (71) of the lower drive mechanism (7).
The top of the carton (21) is transferred to the carton sensor
If detected in (47) (step (ST4)), step (ST4)
In step (5), the carton supply device is stopped, and in step (ST6), a vacuum device (not shown) is operated to make the inside of the suction pipe (72) into a negative pressure state. The outer surface of the lower plate (21a) serving as the side plate of (21) is sucked.

Next, in step (ST7), the upper suction head (81)
To the top of the carton (21). That is, the opening cylinder (80) is extended, whereby the upper suction head (81) at the lower end of the suction pipe (85) hanging down from the horizontal bar (83) is lowered to the upper surface of the carton (21). Next, step (ST
8), a vacuum device (not shown) is operated to make the inside of the suction pipe (85) into a negative pressure state, whereby the upper suction head (81) is attached to the outer surface of the upper plate (21b) as a side plate of the carton (21). Adsorb. That is, when the carton (21) is opened in the shape of a rectangular tube, a pair of parallel lower plates (21a) and upper plates (21b) facing each other are sucked by the bottom suction head (71) and the upper suction head (81).
When the upper suction head (81) is lowered to the upper plate (21b) of the carton (21), the horizontal rod of the carton opening device (6) is
Horizontal plate (8) of carton guide (86) hanging from (83)
8) comes into contact with the upper plate (21b) of the carton (21).

Next, in step (ST9), the upper suction head
(81) is raised. That is, by contracting the opening cylinder (80), the horizontal rod (83) of the upper drive mechanism (8) is raised by the rod (82), whereby the suction rod connected to the horizontal rod (83) is raised. Raise the pipe (85) and the upper suction head (81). Then, as shown by the imaginary line in FIG. 1, the upper suction head (81) moves along an arc-shaped locus while separating from the bottom suction head (71). That is, along the arc-shaped locus as “the locus where the suction position of the first suction means and the suction position of the second suction means with respect to the carton (21) relatively move along with the opening of the carton (21)”. Suction head (8
1) move. Then, the carton (21) folded in a flat state is opened in the shape of a rectangular tube having a rectangular cross section (maximum open state), and beyond this state, the upper suction head (81) is moved from the bottom suction head (71). The arc moves while moving away in the horizontal direction. As a result, the carton (21) is turned over into a parallelogram in the opposite direction beyond the state of the rectangular cross section, resulting in an inversely shaped state. Therefore, in the present embodiment, the functional unit in the microcomputer that executes step (ST9) to operate the upper drive mechanism (8) until the above-described reverse shaping state is reached is the adsorbent drive device that is the above-described invention specific matter. Corresponding to the control means.

Next, in step (ST10), the upper suction head (8
After releasing the adsorption force of the carton (21) by 1),
(ST11) Bottom suction head (71) by lower drive mechanism (7)
To move forward. That is, by rotating the cam plate (67) by the horizontal movement servomotor (69) of the lower drive mechanism (7), the swing arm (63) is rotated forward about the support shaft (65), and Thus, the holding cylinder (77) is fixed to the fixed rail (78) by the rod (79) connected to the output end of the swing arm (63).
Move forward along (51). Then, the carton (21) sucked by the bottom suction head (71) is moved to the bottom suction head.
(71) and move to the carton conveyor (4) side,
During the movement, the upper plate (21b) of the carton (21) is kept in contact with the lower surface of the horizontal plate (88) of the carton guide (86), whereby the carton (21) is initialized by its elastic force. Return to the posture is prevented. And the bottom suction head
Carton (21) held in (71) is carton conveyor (4)
When the carton receiving part (40) of the second carton (21) is reached, the lower plate (21a) of the carton (21) is moved to the rear pawl (41) (the rear pawl located at the upstream end) projecting from the transfer surface of the second conveyor (42). (41)), and reaches the downstream side adjacent portion of the rear claw (41). Then, the fact that the carton (21) has been transferred to the position by the bottom suction head (71) is judged from the rotation amount of the horizontal movement servomotor (69), and the horizontal movement servomotor (69) is stopped. . When the carton (21) enters the carton receiving portion (40) of the carton conveyor (4) having the same width S as the carton width W in the height direction of the carton (21) opened in a rectangular cross section. The upper plate (21b) of the carton (21) moves while approaching or in contact with the lower surface of the first conveyor (32). At this time, the lower plate (21a) of the carton (21) is moved by the second conveyor (21). The part that can pass above the rear claw (41) located at the upstream end of the carton (2)
1) With the shape kept (the upper plate (21b) of the carton (21) pressed down by the horizontal plate (88) of the carton guide (86)), the rear claws (2) of the second conveyor (42) This is because the carton (21) is supplied into the carton receiving portion (40), which is the height in the protruding direction between the tip of the first conveyor (41) and the transfer surface (320) of the first conveyor (32). Therefore, the parallelogram carton (21) supplied to the carton receiving part (40) of the carton conveyor (4)
The relationship between the height L (see FIG. 1) and the protruding height H (see FIG. 3) of the rear claw (41) from the transfer surface (320) of the second conveyor (42) is as follows: L ≦ S− The condition of H is satisfied.

Next, in step (ST12), the bottom suction head (7
1) drop. That is, the swing arm (57) is rotated downward by rotating the cam plate (58) by the elevation drive servomotor (27) of the lower drive mechanism (7). Then, at the output end of the swing arm (57), the sliding pin (62) and the horizontal bar (75) at the upper end thereof are pulled down, whereby the bottom suction head (71) is moved to the rear claw (41). Is lowered by the protruding height H. Along with this, the carton (21) naturally stands up in the rectangular tube having a rectangular cross section due to the elastic restoring force of the carton (21) (the state shown by the imaginary line in FIG. 3).
The bent part (212) on the front side of (21) is the front claw of the first conveyor (32).
(31) and the bent part on the rear side of the carton (21)
(214) abuts against the rear claws (41) of the second conveyor (42), whereby the carton (21) is kept in a rectangular cross-sectional shape by the front claws (31) and the rear claws (41). Supported by In addition, back nail
Whether the bottom suction head (71) has descended by the protrusion height H of (41) is determined based on the rotation amount of the elevation drive servomotor (27).

Next, in step (ST13), the bottom suction head (7
Release the suction force of the carton (21) by 1). That is, the vacuum device (not shown) is deenergized to release the negative pressure state in the suction pipe (72) and the bottom suction head (71) at the upper end thereof,
Thereby, the suction force of the carton (21) by the bottom suction head (71) is released. Therefore, in the present embodiment, a carton guide which presses the bottom plate (21b) of the bottom suction head (71) moving toward the carton conveyor (4) and the upper plate (21b) of the carton (21) from above.
(86) corresponds to the insertion means as the above-mentioned invention specifying matter. That is, in the present embodiment, the upper suction head (71) functioning as the first suction means or the second suction means also has the function of the insertion means.

Then, in step (ST14), the carton conveyor (4) is moved by one pitch (one of the front claws (31) and the rear claws (41) disposed on the first and second conveyors (32) and (42)). When the carton conveyor (4) is stopped again after traveling by the distance corresponding to the pitch), the carton (21) supplied to the carton receiving portion (40) of the carton conveyor (4) is moved by the front claw of the first conveyor (32). (31) and the rear claw (41) of the second conveyor (42) is transported to the downstream side by the above one pitch while being sandwiched from front and rear.

As described above, in this embodiment, after the carton conveyor (4) is stopped until the upper suction head (71) constituting the insertion means releases the suction of the carton (21),
The functional unit of the microcomputer for controlling the driving of the carton conveyor (4) corresponds to the conveyor control means which is a matter specifying the invention described above. Next, in step (ST14), the bottom suction head (71) is retracted to the initial position (step
(ST14)). That is, the cam plate is moved by the servomotor (69) for horizontal movement.
By rotating (67), the swing arm (63) is rotated backward, whereby the slide shaft (74) is moved by the rod (79) connected to the output end of the swing arm (63). Holding cylinder
(77) is retracted to the initial position.

Thereafter, the control operation is returned to step (ST2), and the operation of opening the carton (21) is repeated. As described above, in the present embodiment, the upper and lower plates (21a) and (21b) of the carton (21) are formed by the upper suction head (71) and the bottom suction head (81).
The opening of the carton (21) in the folded state is performed by separating the tip of the carton (21) from the shaping guide (24).
There is no inconvenience that a collision flaw is formed on the carton (21) at the time of the collision (particularly at the time of high-speed processing) as in the above-described conventional apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a carton opening transfer device according to an embodiment of the present invention.

FIG. 2 is a side view of the carton opening device (6).

FIG. 3 is a side view of the carton conveyor (4).

FIG. 4 is a longitudinal sectional view of the carton conveyor (4).

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

FIG. 6 is an explanatory view of a conventional example.

[Explanation of symbols]

 (4) ・ ・ ・ Carton conveyor (6) ・ ・ ・ Carton opening device (21) ・ ・ ・ Carton (31) ・ ・ ・ Front claw (32) ・ ・ ・ First conveyor (41) ・ ・ ・ Back claw ( 42) ・ ・ ・ Second conveyor (71) ・ ・ ・ Bottom suction head (81) ・ ・ ・ Top suction head

Claims (3)

[Claims] 1. A carton opening device for opening a flat folded carton (21) into a rectangular tube having a rectangular cross section, and first and second conveyors (32) and (42) opposed to each other with a transfer surface in parallel. Front nail (31) and rear nail (4)
1) is provided with a plurality of carton conveyors (4), each of which is protrudingly provided on each of the running surfaces, wherein a tip of the rear claw (41) located in the most upstream portion in a protruding direction is provided. The distance between the first conveyor (32) and the transfer surface in the protruding direction in the protruding direction is a carton insertion portion of the carton (21) into the carton conveyor, and the carton (21) having a rectangular cross section is opened. The carton width in the direction of the gap height is larger than the gap height, the carton opening apparatus is configured to remove the outer surfaces of a pair of opposed side plates of the carton (21) folded in a flat state. A first adsorbing means and a second adsorbing means for adsorbing separately, and an adsorbing position of the first adsorbing means with respect to the carton (21) and an adsorbing position of the second adsorbing means with respect to the opening of the carton (21). These first
An adsorbing means driving device that relatively moves the adsorbing means and the second adsorbing means; and the carton (21) is folded back in the opposite direction beyond the opening state of the rectangular cross section from the initial folded state, so that the carton width is reduced. Control means for operating the suction means driving device until the reverse shaping state becomes smaller than the gap height; andthe carton conveyor (4) from the gap height while holding the carton (21) in the reverse molding state. And insertion means for releasing the holding after the insertion, when the carton (21) is elastically restored to the rectangular cross-section when the holding is released, A carton opening transfer device in which the front claw (31) and the rear claw (41) abut separately on front and rear surfaces of the carton (21) in the transfer direction so as to receive the elastic force. 2. The carton conveyor according to claim 1, wherein the carton conveyor (4) is driven after the carton conveyor (4) is stopped until the insertion means releases the holding. Carton opening transfer device provided with control means. 3. The carton opening and transferring apparatus according to claim 1, wherein the first suction means and the second suction means are used when opening the carton (21) until the reversely shaped state is reached. The carton opening transfer device, wherein the movement locus for relative movement is set in an arc shape.