JPS644510Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is an automatic box making method that automatically makes a blank that is integrally equipped with a box body and a top wall that closes the top opening of the box body. It's about machines.

[Conventional technology]

To automatically box the blanks of the above format, the first
As shown in Fig. 7, first, a blank A with adhesive adhered to both side walls 2 and 2' is fed by a nozzle 201 directly below the mandrel 202 so that the bottom wall 1 and the mandrel 202 match, and then When the blank A is pressed by descending, each locking piece 4 stands up upward by the first guide 203 during the descent, then both end walls 3, 3' stand up by the second guide 204, and finally the third guide 2
Both side walls 2, 2' stand up at 05, and the above-mentioned both side walls 2,
Each folding piece 4 overlapping the inner surface of 2' is fixed to form a box.

Next, the molded box a is transferred to a conveyor 2.
It falls onto the rear end of 06 and is transported. During this conveyance, the top walls 5, 5' are first brought down.

The method for folding down the top walls 5, 5' is to position the top walls 5, 5' at the front and back of the traveling direction of the box a, and press down the front top wall 5 by a presser conveyor 207.
Before reaching the presser conveyor 207, the sheet is brought down by an up-and-down arm 208, and fed to the presser conveyor 207 while maintaining the pressurized state by the arm 208.

Next, while maintaining the state of pressing the top walls 5, 5', each fixed piece 6 coated with adhesive by the nozzle 209 is bent by a bending device 210 such as a long rod during transportation, and the side walls 2, The fixing piece 6 was pressed and fixed to 2' for a certain period of time while traveling.

[Problem that the invention attempts to solve]

On the straight conveyance line that connects the box forming section of the automatic box making machine and the discharge section of automatically made boxes, first the rear top wall is brought down by the undulating arm, then the front top wall is pushed down. Since devices are arranged to fold down the box, then bend the stuck piece using a bending device, and then press the stuck piece for a certain period of time, the machine length of the automatic box making machine becomes longer and larger, and a large floor space is required. There was a problem.

Furthermore, there was a problem in that the box body was easily deformed when the top wall was brought down and when the fixing pieces were crimped.

[Means for solving problems]

In order to solve the above problems, in this invention, a first conveyance path is provided in which the top walls are positioned on the left and right and the blanks are sent to a predetermined position, and in the middle of this conveyance path, adhesive is applied to join the side walls and end walls. A coating device is provided to apply the agent, and a forming device is provided at the stop position of the fed blank to form a box using a mandrel that pushes down the bottom wall and guides that raise the end walls, folded pieces, and side walls. Further, a second conveyance path for conveying the molded box body from the molding device to a predetermined position in front is provided, and an application device applies an adhesive for bonding the fixed piece and the side wall in the middle of this second conveyance path. Further, a folding device is provided on both sides of the stopped box body to push down the top wall by folding plates that raise and rotate, and a lifting device is further provided to push the box body upward to a predetermined position after the top wall is folded. The box-making machine was constructed by providing a vertically movable pressing body that descends to sandwich the box body and press the fixing piece against the side wall of the box body, and rises as the lifting device rises.

[Effect]

The blank sent into the forming device is formed into a box by a descending mandrel and a guide that sequentially raises the end walls, folding pieces, and side walls, and by a device that bends the top walls of the box inward, The top wall is pushed down, and while lowering the lifting and lowering pressure welding body located directly above the fixed piece of the top wall, the fixed piece is bent and stacked on the side wall of the box body, and the box is sent upward by a lifting device, and the pressure welded body is moved together. The box is raised to maintain the pressed state of the fixed piece, and then the box is ejected.

〔Example〕

In FIG. 15, a blank A includes a bottom wall 1 made of cardboard or other thick paper, side walls 2, 2' connected to both edges of the bottom wall 1, and end walls 3, 3' connected to both edges of the bottom wall 1. , a folding piece 4 connected to both side edges of both end walls 3, 3' and adhesively fixed to the inner surface of the end of both side walls 2, 2'; The top walls 5, 5' whose opposing edges abut against each other when
Fixing piece 6 that is circumscribed and adhesively fixed to the side walls 2, 2'
Consists of.

Note that the box assembled using the above blank A is used as a tray for cups, so the top wall 5,
5' is provided with a hole 7 for dropping the cup into it, and is also provided with a fixing piece 6 on both end walls 3, 3' to prevent the boxes from shifting when stacked.
The corners of the bottom wall 1 are provided with a planar L-shaped leg 8 that projects upward, and a planar L-shaped punch hole 9 into which the upper end of the leg 8 fits into the corner of the bottom wall 1.
Furthermore, a bottom wall 1, both side walls 2, 2', both end walls 3,
3' is provided with a through hole 10 for infiltration of cold air. However, the blanks used in the automatic box making machine of this invention are not limited to this.

Next, an automatic box making machine for blank A will be explained.

In FIGS. 1 and 2, B is the top wall 5 on the left and right,
This is the first conveyance path that supplies the stacked blanks A one by one starting from the lowest position.

The above-mentioned first conveyance path B includes a locking pawl 12 provided to engage with a side wall 2' located on the rear side in the running direction of the blank A, and a two-way chain conveyor 11 on which the bottom wall 1 rides, and this chain conveyor. It is comprised of a guide rail 13 which is arranged parallel to the outside of the conveyor 11 and whose tip extends forward beyond the tip of the chain conveyor 11 and receives the edges of both top walls 5, 5'.

Moreover, a stopper 14 is provided at the tip of both guide rails 13 to stop the blank A at a predetermined position by coming into contact with the fixing piece 6 located on the front side in the running direction.

Further, on the upper side of the tip of the chain conveyor 11, there is a feeding device 1 for feeding the blank A, which has come off the locking pawl 12 and is stopped, to the stopper 14.
5 is provided.

As shown in FIGS. 4 and 5, the above-described feeding device 15 includes a shaft 16 installed directly above the tip of the chain conveyor 11 so as to cross the chain conveyor 11, and bearing materials provided at both ends of the shaft 16. 17
and two front and rear rotating shafts 18 and a support shaft 1 located below the shaft 16 and bearing both ends on a bearing material 17.
9, a front swinging plate 20 whose upper end is fixed to the rotating shaft 18, a rear swinging plate 21 whose upper end is rotatably attached to the support shaft 19, and this front swinging plate 20 and the rear swinging plate. It consists of a connecting plate 23 rotatably attached at both ends to the lower end of the plate 21 via a pin 22, and a claw 24 projecting downward from the forward facing end of the connecting plate 23. Then, the rotor 27' of the tilting plate 27 having the support shaft 26 at one end is brought into contact with the cam 25 to rotate the tilting plate 27 up and down, and the rod 28 connected to the other end of the tilting plate 27 is raised and lowered. The rotation is transmitted from the bevel gear 30 driven by the counterclockwise swinging of the link 29 connected to the upper end of the rod 28 to the bevel gear 31 fixed to the rotating shaft 18. By rotating the rotary shaft 18, the claw 24 is engaged with the side wall 2' of the blank A, and the blank A is fed so that the fixing piece 6 comes into contact with the stopper 14.

In addition, as shown in the figure, the end of the cylinder 116 is fixed to one side of the plate 115, and this plate 115
The support shaft 16 is passed through the cylinder body 116, and the cylinder body 11
Fix the plate 115 at a predetermined position on the support shaft 16 by screwing in the screw 117 screwed into
This plate 1 is rotatably supported at the end of plate 19.
15 and the cylindrical body 118, and the support shaft 19 is passed through the plate 115 and the cylindrical body 119.
The rotation is transmitted to the cylindrical body 11.
8, 119 to the upper ends of the front swing plate 20 and the rear swing plate 21, the plate 115
By moving the feed device 15, the position and spacing of the feed device 15 can be freely adjusted.

As shown in FIG. 2, a coating device 32 is provided directly above the first conveyance path B to apply adhesive to both ends of both side walls 2 and 2' of the traveling blank A.

The above coating device 32 includes a melting storage tank for adhesive such as hot melt, a nozzle equipped with a solenoid valve disposed directly above the passage line at both ends of the side walls 2 and 2', and a hose connecting the storage tank and the solenoid valve. , and an adhesive pressure pump built into the storage tank,
The adhesive is sprayed from a nozzle by activating a limit switch or a phototube (not shown) depending on the blank A while it is running.

C is blank A stopped by stopper 14
This is a molding device for molding into a box a.

As shown in FIGS. 1 to 3, the above-mentioned molding device C has a bottom surface that has approximately the same shape as the bottom wall 1, and is capable of raising and lowering the blank A that is carried into the molding device C and returns to the top of the bottom wall 1. a mandrel 33 and a first guide 35 that raises the end walls 3, 3' by lowering the mandrel 33;
, each folding piece 4 is disposed outside the first guide 35, and in the middle of rising the end walls 3, 3'.
a rotating folding piece 34 that bends the
Finally, the second guide 36 raises the side walls 2, 2'.

The above-mentioned mandrel 33 is adapted to be raised and lowered by a crank mechanism 37, but may be raised and lowered by extension and contraction of a cylinder.

As shown in FIGS. 3 and 9, on the lower side of both end walls 3, 3' of the blank A fed into the molding device C,
A rotating shaft 38 is provided parallel to the guide rail 13, and an arm 39 fixed to this rotating shaft 38 is provided.
Attach the rotary folding piece 34 to the tip of the drive shaft 4.
The bevel gear 41 of No. 0 and the bevel gear 42 of the rotating shaft 38 are engaged with each other to cause the rotary folding piece 34 to rotate up and down.

A lowering device 43 is provided below the molding device C to raise the top walls 5, 5' and send the molded box a downward.

The above-mentioned lowering device 43 is shown in FIGS. 1, 7, and 8.
As shown in the figure and FIG. 10, it consists of a chain 45 spanning between the upper and lower sprockets 44 and a pawl 46 attached to this chain 45. Claws 46 are engaged with both ends of the upper edge to feed it downward.

Furthermore, a second conveyance path D is provided below the molding device C to convey the molded box a to a predetermined position in front (FIG. 1).

As shown in FIG. 10, the above-mentioned second conveyance path D consists of two sliding rails 47 whose rear ends are located below the molding device C, and two sliding rails 47 laid between both ends of these rails 47. a chain conveyor 48, and an L-shaped rotary claw 50 whose bent portion is rotatably attached to the chain of the chain conveyor 48 via a pin 49.
and a guide rail that extends to almost both ends of the conveying surface of the chain conveyor 48 and stands up the rotating claw 50 so that one leg of the rotating claw 50 rides on it and the tip of the rotating claw 50 engages with the side wall 2'. 51.

Further, in the middle of the second conveyance path D, a coating device 52 is provided for applying adhesive to the back surface of each fixing piece 6 of both the top walls 5, 5' standing upright.

The coating device 52 described above is similar to the coating device 32 described above.

Furthermore, a stopper 53 is provided at the tip of the second conveyance path D to come into contact with the side wall 2 and stop the box a at a predetermined position.

Next, as shown in FIGS. 1 and 2, the top wall 5 of the box a stopped at the tip of the second conveyance path D,
A folding device E is provided for pushing down 5'.

This folding device E rotates a folding plate 63 fixed to a rotating shaft 62 from a vertical upright position to a horizontal tilted position, thereby folding the top walls 5, 5' together.

The drive mechanism for the shaft 62 will be explained based on FIGS. 10 to 12.

As shown in the figure, a rotor 112 of a tilting plate 111 is engaged with the grooved cam 54. A support shaft 110 is rotatably supported at one end of the tilting plate 111, and a rod 55 is connected to the other end. has been done. This rod 55
The upper end of the rotary shaft 56 is connected to a protruding piece 57 fixed to the rotating shaft 56 . Further, the rotary shaft 56 is provided with the protruding piece 5.
A protruding piece 113 that protrudes in the opposite direction of the bevel gear 58 is fixed, one end of a rod 60 is connected to this protruding piece 113, and the other end of this rod 60 is connected to a rotating plate 59 that rotates a bevel gear 58. has been done. This bevel gear 58 is meshed with a bevel gear 61 that rotates the shaft 62.

In addition, as shown in the figure, by providing a comb-like uneven part 64 on the upper edge of the folding plates 63, 63 so that when one folding plate 63 is folded down, it engages with the uneven part 64 of the other. The opposing edges of the folded top walls 5, 5' can be pressed together so as to abut against each other.

Further, as shown in the figure, by providing a lift table 65 below the box a stopped by the stopper 53, the lifting stop position of which can be freely adjusted, the side walls 2, 2' and the end walls 3, 3 By pushing up the box a whose height is small, the fold line of the top walls 5, 5' can be kept at a constant height.

As shown in FIGS. 10 and 14, the table 65 is guided by a guide member 69 so as to be movable up and down. The guide member 69 is connected to the rear end of the L-shaped rocking body 66 via a turnbuckle 70, and the rotor 67 attached to the front end of the rocking body 66 contacts the cam 68, causing the pin 106 of the rocking body 66 to By swinging around table 6
5 is designed to go up and down.

Further, as shown in FIG. 14, the bent portion of the L-shaped rocking body 121 is rotatably supported via the pin 106, and the rod 12 is attached to the horizontal leg of the rocking body 121.
The lower ends of 2 are rotatably connected, the upper end of the rod 122 is passed through the frame 124, a nut 125 is screwed in from the upper end of the rod 122, and a protruding shaft 126 is provided on the vertical leg of the rocking body 121. By bringing the vertical side surface of the rocking body 66, which rotates counterclockwise in FIG. 14, into contact with this protruding shaft 126, the lifting stop position of the table 65 is determined. Therefore, when the rod 122 is raised or lowered by rotating the nut 125, the protruding shaft 1
The stop position of the rocking body 66 by the oscillator 26 can be changed, and the rise stop position of the table 65 can be freely adjusted.

Next, a description will be given of the lifting device F that lifts up the box a with the top walls 5, 5' folded down to a predetermined height.

As shown in FIGS. 11 and 12, a set of four outer sprockets 71 are arranged on the left and right at predetermined intervals in the front and rear as well as in the upper and lower directions, and the outer sprocket 7 is located near the front of the outer sprocket 71.
A set of four inner sprockets 72 similar to 1 are positioned on the rising side of the endless chain 73 that extends over the outer sprocket 71 and the inner sprocket 72.
The ascending sides of the endless chains 74 are arranged in parallel in the front and back, and the chain 73 is fixed to the rear ends of two parallel forks 75, and the chain 74 is fixed to the middle part of the forks 75. and chains 79 and 8 that extend between the sprocket 77 coaxial with the outer sprocket 71 and the sprocket 78 coaxial with the inner sprocket 72.
0, the chains 73 and 74 are run, and when the fork 75 reaches the highest position, the fork 75 is moved backward, then lowered, and the fork 75 is projected forward to the bottom of the box a. It is inserted and then raised.

Next, a vertically movable pressing body G which bends each fixing piece 6 and presses against the side walls 2 and 2' will be described.

As shown in FIGS. 10 and 14, the above pressure contact body G includes a vertical guide shaft 81, a pressure contact plate 83 fitted with a cylindrical plate 82 fitted to the guide shaft 81 so as to be movable up and down. supported at one end by a shaft 84;
In addition, an undulating arm 89 whose other end is connected to the pressure contact plate 83, a V-shaped rotating plate 86 whose bent portion is pivotally supported by a shaft 85, and a rotating plate 86 with a pivot supported on the lower leg of this rotating plate 86 a trochanter 88 brought into contact with the peripheral edge of the cam 87;
It is composed of an upper leg portion of the rotating plate 86 and a rod 90 connected at both ends to the arm 89. After folding down the top walls 5, 5', the lower outer circumference of the cam 87 is brought into contact with the trochanter 88, and the pressure contact plate 83 is lowered. The pressing plate 83 is brought into contact with the fork 75 and raised at the same speed or slightly behind the fork 75 to maintain the pressed state of the fixed piece 6.

When the fork 75 reaches the uppermost plate, the box is removed by the ejector H.

As shown in FIG. 14, the ejection device H includes a plate-shaped body 92 attached to the tip of a slide shaft 91 so that the plate surface is perpendicular, and a tilting plate 94 whose lower end is pivotally supported via a shaft 93. a trochanter 96 attached to the lower part of the tilting plate 94 and brought into contact with the peripheral edge of the cam 95;
It is composed of a pin 97 that connects the rear end of the slide shaft 91 and the upper end of the tilting plate 94. and cam 9
5, while tilting the tilting plate 94, the plate-like body 92 is moved forward and backward together with the slide shaft 91, and the box is projected into the chute 98 by the advance of the plate-like body 92.

As shown in FIG. 2, the upright top walls 5, 5' of the box a supplied from the molding device C to the front end of the conveyance path D are sandwiched between a set of two rods 99. By running the adhesive while maintaining the adhesive vertically, the spraying position of the adhesive onto the fixed piece 6 by the application device 52 becomes accurate.

Further, as shown in FIGS. 3, 6, and 7, a swinging piece 100 whose lower end is pivotally supported is provided outside the passage in which the end walls 3, 3' descend in the molding apparatus C,
The cam 101 causes the swinging piece 100 to swing slightly inward from the vertical position, and the end wall 3,
By pressing the end walls 3', the end walls 3, 3' are prevented from opening outward in the upright state.

In the figure, reference numeral 102 denotes a retractable claw that is retracted when the box a is lowered and pushed out after the box a has passed.The retractable claw 102 allows the box a to remain in the molding device C when the mandrel 33 is raised. ing. Also, 1
03 is a spring that presses the swinging piece 100 against the cam 101; 104 is a guide for raising the top walls 5, 5';
05 is a spring that presses the trochanter 67 against the cam 68 (Fig. 14), 107 is a spring that presses the trochanter 96 against the cam 95 (Fig. 14), and 108 is the laminated hopper of blank A (Fig. 1). ).

The automatic box-making machine according to the embodiment of this invention has the above-mentioned configuration, and its operation will be explained next. It is sequentially and intermittently pulled out and supplied onto the rear end of the first conveyance path B. At this time, the guide rails 13 support the leading edges of the top walls 5, 5'.

The blank A that has been drawn out as described above is sent out by the chain conveyor 11 having the hook 12 that engages with the side wall 2', and when it is further pushed out by the feeding device 15, the fixing piece 6 of the blank A hits the stopper 14. It touches and stops in a fixed position.

At this time, each side wall 2 of the blank A passing through,
Adhesive is applied to the surface of 2' by an application device 32.

Thereafter, when the mandrel 33 is lowered, the lower surface of the mandrel 33 during the lowering comes into contact with the bottom wall 1, and the bottom wall 1 is pushed down.

During the descent of the mandrel 33, the top walls 5, 5' are first raised by the guide 104, then both end walls 3, 3' are bent upward by the first guide 35, and then rotated. Each folding piece 4 is bent by the piece 34, and finally the second guide 36
As a result, both side walls 2, 2' are bent upward.

At this time, the folding pieces 4 are adhered to the inner surfaces of both ends of the side walls 2, 2', and the box body a with the top walls 5, 5' in an upright state is assembled.

When the box body a is assembled as described above, the protruding and retracting claws 102 are engaged with the upper edges of the side walls 2 and 2' to hold the box body a in a fixed position, so that the mandrel 33
As the box body a rises, the box body a comes out of the mandrel 33.

Thereafter, the chain 45 of the lowering device 43 is run to engage the claws 46 with the upper edges of the side walls 2, 2', and the box a is dropped onto the rear end of the transport path D.

The box a that has fallen onto the second conveyance path D rides on the guide rail 51 and the rotary claw 5 maintains the upright state.
0 and the side wall 2' (FIG. 10) are brought into contact with each other and conveyed forward, and during this conveyance, adhesive is applied to the back surface of each fixing piece 6 by a coating device 52.

Then, the side wall 2 is brought into contact with the stopper 53 to stop the box a at a fixed position.

At this time, the rotating claw 50 comes off the tip of the guide rail 51 and rotates in the falling direction due to its own weight, so that the engagement between the rotating claw 50 and the side wall 2' is released.

When the box body a is stopped at a fixed position by the stopper 53, the box body a is pushed up to the fixed position by the lifting table 65, and the rod 55 is raised by the grooved cam 54 to rotate the rotating shaft 56. The rod 60 is lowered and the bevel gears 58, 61
The rotary shaft 62 rotates approximately 90 degrees through the (FIG. 11).

Therefore, the folding plate 63 rotates from the vertical position to the horizontal position, pushes down the top walls 5, 5', and the top opening of the box a is closed by the top walls 5, 5'.

Before or after the pushing down of the top walls 5, 5' is finished, the trochanter 88 is brought into contact with the lower outer periphery of the cam 87,
Since the tip of the arm 89 is lowered via the descending rod 90, the pressure contact plate 83 of the pressure contact member G is lowered (FIG. 14).

Each fixing piece 6 is bent downward by the lower end of the pressure plate 83, and the respective fixing piece 6 is pressed against the side walls 2, 2'.

After the fixing piece 6 is pressed, the rod 55 is pulled up by the grooved cam 54 and the rod 60 is raised, so that the rotary shaft 62 rotates and the folding plate 63 returns to the upright position.

After the return rotation of the folding plate 63, the running chains 79 and 80 push the fork 75 into the lower side of the folding device E, abutting against the lower surface of the bottom wall 1 and lifting the box.

At this time, the pressing body G pushes up the tip of the arm 89 due to the rise of the rod 90, and rises together with the fork 75.

During this time, the rising speed of the fork 75 and the pressure contact plate 83
Since the rising speed of the fixing pieces 6 and the fixing pieces 6 are substantially constant, displacement of each fixing piece 6 from the side walls 2, 2' is prevented and the press-contact state is maintained.

When the fork 75 reaches the highest position, it retreats.

Thereafter, the slide shaft 91 of the ejection device H is advanced by the cam 95, the plate-like body 92 is brought into contact with the end wall 3 of the box, and the box is ejected from the pressing body G to the chute 98 and ejected.

〔effect〕

As described above, according to the automatic box making machine according to this invention, after the blank is fed into the forming device and the box body is assembled, the box body is fed into the folding device through the second conveyance path and both top walls are pushed down. Thereafter, each fixed piece is bent by lowering the press-fitting body to fix the fixed piece to the side wall, the press-fitting body maintains the pressed state of the fixed piece, and the lifting device lifts the box and at the same time lifts the press-fitting body. Since the box is then discharged, the machine length of the automatic box making machine can be shortened and the installation floor space can be reduced.

Further, since the pressure of the fixing piece is maintained by the press member, there is no lifting of the top wall, and it is possible to manufacture a box in which the side edge of the top wall is securely fixed to the upper edge of the side wall.

Furthermore, since the pressing member has the same speed as or slightly slower than the lifting speed of the lifting device, there is no shifting movement of the fixed piece, and deformation of the box body can be eliminated.

[Brief explanation of the drawing]

Figure 1 is a side view of the automatic box making machine according to this invention.
Fig. 2 is a plan view of the same, Fig. 3 is an enlarged plan view of the molding device, Fig. 4 is an enlarged front view of the feeding device, Fig. 5 is a side view showing the main parts of the same, Fig. 6 is the same as Fig. 3 X-
7 is a sectional view taken along the Y-Y line in FIG. 6, FIG. 8 is a sectional view taken along the Z-Z line in FIG. 7, and FIG. 9 shows the rotating part of the folding piece. 10 is a partially cutaway side view of the folding device, FIG. 11 is an enlarged side view of the lifting device, and FIG. 12 is a longitudinal sectional front view.
The figure is a longitudinal rear view of the same as above, Fig. 13 is a longitudinal front view of the part where adhesive is applied to the top wall, Fig. 14 is a front view showing the drive of the pressure contact body, Fig. 15 is a plan view of the blank, and Fig. 16 The figure is a blank automatic box manufacturing process diagram, 1st
FIG. 7 is a schematic perspective view of a conventional box making device. A...Blank, a...Box body, 1...Bottom wall,
2, 2'... Side wall, 3, 3'... End wall, 4... Folding piece, 5, 5'... Top wall, 6... Fixed piece, B...
First conveyance path, 11... Chain conveyor, 12...
Locking claw, 13... Guide rail, 14... Stopper, 15... Feeding device, 32... Coating device, C... Molding device, 33... Mandrel, 34
... Rotating folding piece, 35 ... First guide, 36
...Second guide, 43...Descent device, 44...Sprocket, 45...Chain, 46...Claw, D...
...Second conveyance path, 47...Rail, 48...Chain conveyor, 49...Pin, 50...Rotating claw, 51
... Guide rail, 52 ... Coating device, 53 ...
Stopper, E...Folding device, 65...Elevating table, F...Lifting device, 71...Outer sprocket, 72...Inner sprocket, 73...
Chien, 74... Chien, 75... Folk, 7
6... Drive sprocket, 77, 78... Sprocket, 79, 80... Chain, G... Pressure contact body,
83... Pressure plate.

Claims (1)

[Scope of utility model registration request] a bottom wall, a side wall connected to both side edges of the bottom wall, an end wall connected to both ends of the bottom wall, and a folding piece connected to the edge of the side wall or the end wall and joining the side wall and the end wall. This is an automatic box making machine for making boxes, which consists of a top wall provided as an extension of both end walls, and fixing pieces connected to both side edges of the top walls and adhesively fixed to the outer surface of the side walls. A first conveyance path is provided for positioning the top wall and feeding the blank into a predetermined position, and a coating device for applying an adhesive for joining the side wall and the end wall is provided in the middle of this conveyance path, and the first conveyance path At the stop position of the blank sent to the tip of the machine, a forming device is installed to form a box using a mandrel that pushes down the bottom wall and guides that raise the end walls, folding pieces, and side walls. A second conveyance path is provided for conveying the molded box extending from below to the front, and a coating device is provided in the middle of this second conveyance path for applying an adhesive for bonding the fixed piece to the side wall, and 2. Folding devices are installed on both sides of the box body stopped at the tip of the conveyance path to push down the top walls of each other using folding plates that rotate up and down, and a lifting device is further provided to push the box body upward to a predetermined position after folding the top wall. An automatic box making machine is provided with a vertically movable pressing body that descends to sandwich the box body to press a fixed piece against the side wall of the box body and rises as a lifting device rises.