JPH0755059Y2 - Assembly box automatic assembly equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic assembly apparatus for an assembly box.

(Prior Art) Conventionally, as a device of this type, for example, US Pat. No. 4,310,323 is used.
The one disclosed in the issue is known. As shown in FIG. 10, the box assembled by the assembling apparatus is composed of a corrugated board partition plate A and a box body B.
The partition plate A is, as shown in FIGS.
Formed by bending a rectangular plate A ',
First, after being bent downward along a pair of fold lines b orthogonal to the fold line a, it is bent upward along the fold line a and formed into a substantially H shape in a plan view.

On the other hand, as shown in FIG. 9 (e), the plate material B ′ forming the box body B has side walls B ₂ and B _{2 on} the left and right edges of the rectangular bottom wall B ₁ via fold lines e and e. Consecutive lines, fold lines on the side edges of each side wall B ₂ , B ₂
Top walls B ₃ and B ₃ are connected in series via d and d, and each wall
Ear pieces B ₁ ′, B ₂ ′ and B ₃ ′ are connected to the front and rear edges of B ₁ , B ₂ and B ₃ , respectively. The partition plate A is the bottom wall of the plate material B '.
It is placed as if a substantially H-shape was placed horizontally on B ₁ in a plan view.

Here, the plate material B 'is assembled to the box body B by said set elevational device, as shown in FIG. 10, the bottom wall B ₁ of the ear piece B of the outer length W of the partition plate A is the box body B ₁ 'longer than the length l of, also, the bottom lug B ₁ wall B ₁ toward the inner partition plate a' a 'sheet B by bending' and ear piece B ₂ of the side wall B ₂ to the box body B when assembled, it is formed so as not to overlap each other and the lugs B ₁ 'and the ear piece B ₂ of the side wall B _2' bottom B _1.

Therefore, in said set stand device, when assembling the plate material B 'was placed on the inner partition plate A and the bottom wall B ₁ in the box body B, as shown in FIG. 9 (f), each side wall B ₂ and the side walls B ₂ earpiece
B ₂ ′ stands at right angles to the bottom wall B ₁ and each side wall B _{2 ′}
Ear piece B ₂ 'and be folded towards the right angle inner partition plate A for each side wall B _2, each bottom wall B ₁ of the ear piece B _1' each bottom wall B ₁
The bending at a right angle to the partition plate A is completed at the same time. And each ear piece B ₁ ′, B ₂ ′,
The B ₃ ′ and the partition plate A are adhered to each other via the adhesive applied to each ear piece B ₁ ′, B ₂ ′, B ₃ ′.

(Problems to be Solved by the Invention) However, as disclosed in US Pat. No. 4,310,323, the ear pieces B ₂ ′ of each side wall are directed toward the partition plate A at right angles to each side wall B ₂ . Bending and ear pieces on each bottom wall
Depending on the assembling apparatus which simultaneously completes the bending of B ₁ ′ toward the partition plate A at right angles to each bottom wall B ₁ , inconvenience occurs when assembling a box as shown in FIG. 7.

That is, in the box shown in FIG. 7, when the partition plate C is placed on the bottom wall and the box body D is assembled, the ear pieces on each side wall are
The side wall of the partition plate C is arranged between D ₂ ′ and the ear piece of each side wall is arranged.
A bottom wall ear piece D ₁ ′ is formed so as to overlap with D ₂ ′.

Therefore, when the box shown in FIG. 7 is to be assembled by the assembling apparatus, the ear piece D ₁ ′ on the bottom wall and the ear piece D ₂ ′ on the side wall,
When the folding with D ₂ ′ is performed at the same time, the ear pieces collide with each other and interfere with each other, making it difficult to fold each ear piece. Therefore, when assembling the box shown in FIG. 7, first, as shown in FIG. 6 (a), the ear pieces D ₂ ′ and D ₂ ′ on the side wall are first bent inward, and then the box shown in FIG. As shown in, start bending the ear piece D ₁ ′ of the bottom wall D ₁ ,
As shown in FIG. 6C, it is necessary to superimpose the ear piece D ₁ ′ of the bottom wall D ₁ on the ear pieces D ₂ ′ and D ₂ ′ of the side wall.

In view of the above, an object of the present invention is to provide an automatic assembly device for an assembly box that can be easily assembled even if the side wall ear piece and the bottom wall ear piece folded inward of the box overlap each other. And

(Means for Solving the Problems) In order to achieve such an object, the automatic assembling apparatus for an assembling box according to the present invention has an intermediate partition plate formed in a substantially H shape in a plan view on a rectangular bottom wall. And a pair of side walls connected to the left and right edges of the bottom wall via fold lines, and first ear pieces connected to the front and rear edges of the side walls via fold lines, respectively. Regarding the corrugated board material in which the second ears are connected to each other via the fold lines, the side walls and the first ears are erected at right angles to the bottom wall, and the first ears are placed on the partition plate. An automatic assembling device for an assembling box that folds inwardly inwardly and then folds inwardly so that each second ear piece comes into contact with the middle partition plate and each folded first ear piece. A pair of vertical lift bodies that are arranged on the edge side and are vertically moved up and down by a cylinder fixed to a gantry, and the bottom of each vertical lift body. Horizontal lift bars that extend in the horizontal direction along the front and rear edges of the plate material at the end portions, a pair of guide cylinders that are erected at a distance from each other on the horizontal lift bars, and each guide cylinder that is fixed to the gantry. Is vertically slidably inserted and is connected to a vertical guide shaft that guides the vertical lift body and the horizontal lift bar up and down, and a coil spring suspended from the upper end of each vertical guide shaft, and is externally inserted to each vertical guide shaft. , A rack holder having a rack extending vertically to the outer surface and each horizontal lift bar are pivotally supported, and while the horizontal lift bar moves up and down from the lowest position until each guide cylinder abuts on the rack holder, the rack is engaged and rotationally driven. And a pinion that is coaxially supported by each horizontal lift bar and is in a horizontal state when the horizontal lift bar is at the lowermost position and contacts the lower surface of each first ear piece of the plate material. , As the horizontal lift bar rises and the pinion rotates, it swings in the upright direction while pressing the lower surface of each first ear piece, and moves each first ear piece inward at a substantially right angle to each side wall. When the first folding plate to be folded and the first folding plate is provided on each of the first folding plates and swings together with the first folding plate, and when the first folding plates fold the first ear pieces inwardly with respect to the side walls, A folding auxiliary plate that abuts the outer surface of each side wall and swings in the standing direction, and when each guide cylinder abuts the rack holder and the rotation of the pinion is stopped, the side walls stand up at a substantially right angle to the bottom wall, As the horizontal lift bar rises, when the guide cylinders come into contact with the rack holder and then push up the rack holder against the coil springs to move up, the guide walls are pushed from above to the bottom wall of the plate that rises along with the horizontal lift bar. A restricting member that contacts and restricts the rise of the bottom wall, and the first left and right It is connected to each vertical lift body between the insert plates, contacts the lower surface of each second ear piece of the plate material and moves up and down together with the horizontal lift bar, and even after the bottom wall is restricted from rising by the restriction member, each second ear piece is moved. Supporting and continuing to rise, each second
A second folding plate that folds the ear piece into contact with the middle partition plate and each first ear piece, and a second folding plate that is located below the bottom wall of the plate material and connected to each vertical lift body. And a support plate for supporting the bottom wall of the plate member in which the two ear pieces are folded.

(Operation) In the device of the present invention, the vertical lift body and the horizontal lift bar are integrally lifted by being driven by the cylinder fixed to the pedestal. The vertical lift of the horizontal lift bar is guided by the vertical guide shaft through the guide tube.

First, when the horizontal lift bar is at the lowest position, the first folding plate is in the horizontal state at the position where it is rotated outward. A flat corrugated board material in which a substantially H-shaped partition plate is placed horizontally on the bottom wall is arranged between each vertical lift bar, and the upper end surface of the first folding plate contacts the lower surface of the first ear piece, The upper end surface of the second folding plate is in contact with the lower surface of the two tabs to support the plate member.

Next, when the horizontal lift bar starts to move up by being driven by the cylinder, the plate material on which the intermediate partition plate is placed also moves up. At this time, the coil spring maintains the rack holder at a fixed position on the vertical guide shaft, so that the pinion engages with the rack and rotates, and ascends together with the horizontal lift bar. With the rotation of the pinion, the first folding plate swings in the upright direction while pressing the first ear piece from the lower surface, thereby raising the first ear piece and bending the first ear piece inward with respect to the side wall. The first ear piece stands up and the side wall continuous with the first ear piece stands up, but when the first ear piece is folded inward with respect to the side wall by the first folding plate, the folding assist plate. Contacts the outer surface of the side wall and swings in the standing direction, so that the side wall stands up against the bottom wall.
Then, when each guide tube comes into contact with the rack holder,
Each side wall and the first ear piece stand upright at a right angle to the bottom wall, and each first ear piece is folded inward at a right angle to the standing side wall.

After each guide cylinder comes into contact with the rack holder, the horizontal lift bar further rises, and when each guide cylinder pushes up the rack holder against the coil spring and rises, the rack rises together with the pinion, so the rotation of the pinion Stops and the first folding plate maintains the upright state. At this time, the second folding plate rises while coming into contact with the lower surface of the second ear piece of the plate material, while the bottom wall of the plate material is restricted from rising by the restriction member. As a result, the second ear piece pressed by the rise of the second folding plate rises up along the fold line, and is folded and abuts on the already folded first ear piece and the partition plate. The bottom wall of the plate member is supported by the support plate when the second ear piece is folded.

In this way, after the first folding plate completes the folding of the first ear piece of the side wall, the second folding plate starts folding of the second ear piece of the bottom wall, so that the ear piece of the side wall and the ear piece of the bottom wall. There is no interference with the piece during the folding process.

(Embodiment) Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiment. The automatic assembling apparatus for the assembling box of the present invention comprises a pair of folding devices having the same structure. However, for convenience of description, only the configuration of one folding device will be described.

1 is a front view of the folding device, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG.

In the figure, 1 is a cylinder for raising and lowering a vertical lift body 3, which will be described later, and is suspended by a pedestal 2 with its piston rod 1a facing downward. Reference numeral 3 denotes a strip-plate-shaped vertical lift body whose upper end is pivotally connected to the piston rod 1a of the cylinder 1, and a horizontal lift bar 4 extending horizontally is connected to the outer surface of the lower end. At a position equidistant from the substantially central portion of the horizontal lift bar 4, there are provided a pair of guide cylinders 5, 5 through which a guide shaft 11, which will be described later, slidably extends.

Reference numeral 6 is a spacer slidably fitted in a vertical elongated hole 10a of a fixed die plate 10 connected to a die frame 9 fixed to the frame 2. The vertical lift body 3 is connected to one side of the spacer 6 and the support plate 7 is connected to the other side.
The horizontal lift bar 4 is connected through the vertical lift body 3 and the horizontal lift bar 4 so that the vertical lift body 3 and the horizontal lift bar 4 can be moved up and down along the long hole 10a of the fixed die plate 10. Reference numerals 8 and 8 denote a pair of cam followers provided in the vertical lift body 3 in the elongated hole 10a of the die plate 10. Depending on the relationship with the length of the elongated hole 10a, the vertical movement stroke of the vertical lift body 3 is increased. Has been decided.

Reference numerals 11 and 11 denote a pair of vertical guide shafts which extend in parallel with the vertical lift body 3 with the vertical lift body 3 interposed therebetween and slidably vertically pass through the respective guide cylinders 5, and the upper ends thereof are fixed to the mount 2. 12,12
Is a rack holder slidably fitted on each of the pair of vertical guide shafts 11, 11. Reference numerals 13 and 13 denote coil springs 13 and 13 each having one end fixed to the pedestal 2, and the guide cylinders 5 and 5 rise with the rise of the horizontal lift bar 4 until they come into contact with the rack holders 12 and 12. Holder 12,
Continue to hold 12 in a fixed position on the vertical guide shafts 11, 11.
Note that the guide cylinders 5 and 5 are, together with the horizontal lift bar 4, further coil springs 1 after contacting the rack holders 12 and 12.
It can rise against 3,13. 14 and 14 are rack holders 1
It is a rack installed vertically on the outer surface of each of the 2 and 12.
15 and 15 are pinions that mesh with the racks 14 and 14, and shafts
16 and 16 are rotatably supported by the horizontal lift bar 4 via bearings 17 provided near both ends of the horizontal lift bar 4.

Reference numerals 18 and 18 denote first folding plates for folding the side walls D ₂ and the first ear piece D ₂ ′ inward, and the bases are coaxial with the shafts 16 and 16 of the pinions 15 and 15 to the bearings 17 and 17, respectively. It is supported and can rotate inward by approximately 90 degrees from the horizontal state to the standing state with the rotation of the pinions 15, 15. The first folding plates 18, 18 are provided so as to be in a horizontal state when the pinions 15, 15 are engaged with the lower ends of the racks 14, 14, and in the horizontal state, the upper end surface of the first folding plates is The lower surface of each first ear piece D ₂ ′ is in contact with 18a, 18a. In addition, the tip portions of the respective upper end surfaces 18a, 18a are tapered and inclined. 18c, 18c are provided on the first folding plate located below each side wall D _2, the outer surface of the side wall D ₂ when the first ear piece D ₂ 'is folded inwardly to the side wall D ₂ It is a folding assisting plate that abuts against and assists folding of the side wall D ₂ . When the first folding plates 18 and 18 are in the upright state, the side wall D ₂ is on the outer surface of the folding assisting plates 18c and 18c.
It stands up at a right angle to the bottom wall D ₁ via the crease line by abutting c, and the first ear piece D ₂ ′ abuts the first folding plate 18, 18 on the outer surface to form the crease line. It is folded inward at a substantially right angle to the side wall D ₂ via.

Reference numeral 19 is a second folding plate for folding the second ear piece D ₁ ′ of the bottom wall D ₁ , and when the first folding plates 18, 18 are in a horizontal state, the upper end surfaces 18a, 18a of the first folding plates 18a, 18a. And the upper end surface 19a of the second folding plate are fixed to the vertical lift body 3 so as to be flush with each other. At this time, the second ear piece D ₁ ′ is attached to the upper end surface 19a of the second folding plate.
The lower surface of is in contact. Reference numeral 19b denotes a support plate located below the bottom wall D ₁ and movably downwardly urged upward by a coil spring on the vertical lift body 3 with a second folding plate 19 interposed therebetween. ears D ₁ 'to support the bottom wall D ₁ in contact with the lower surface of the bottom wall D ₁ when folded substantially perpendicular to the bottom wall D _1.

Reference numeral 20 is a restricting member that restricts the plate material D ′ forming the box body D from rising above a predetermined amount when the plate material D ′ rises together with the vertical lift body 3. The regulating member 20 is located above the bottom wall D ₁ of the plate material D ′ arranged between the vertical lift bodies 3 and fixed to a part of the pedestal 2, and the guide cylinders 5 and 5 are attached to the rack holder 12. , 12, and then the bottom wall D ₁ from above.

The assembling apparatus of the present invention is composed of one set of the above-mentioned folding devices, and is arranged opposite to each other with the first folding plates 18, 18 and the second folding plate 19 inside as shown in FIG. Then, as shown by the phantom lines in FIGS. 1 to 3, the plate material D ′ supplied between the pair of folding devices is assembled into the box body D.

Next, the operation of the above embodiment will be described with reference to the operation explanatory diagrams of FIGS. 4 and 5.

FIG. 4 (a) shows a state in which the plate material D ′ having the intermediate partition plate C placed on the bottom wall D ₁ is supplied to the assembling apparatus of this embodiment. At this time, the first folding plates 18 and 18 are in a horizontal state at the position rotated outward, and the upper end surfaces 18a and 18a thereof contact the lower surface of the first ear piece D ₂ ′ of the side wall D ₂ of the plate material D ′. Touching, second again
The upper end surface 19a of the folding plate 19 is in contact with the lower surface of the second ear piece D ₁ ′ of the bottom wall D ₁ . As a result, the plate member D'is placed with the lower surfaces of the first and second ear pieces supported by the first and second folding plates 18 and 19, respectively.

When the cylinder 1 operates from this state and the piston rod 1a retreats upward, the horizontal lift bar 4 ascends together with the vertical lift body 3 connected thereto. FIG. 4B is a diagram showing a state where the vertical lift body 3 and the horizontal lift bar 4 are being lifted. At this time, since the coil spring 13 continues to hold the rack holder 12 at a fixed position of the guide shaft 11, the pinion 15 meshes with the rack 14 and ascends as the horizontal lift bar 4 rises. Pinion 15
With the rotation of the first pinion 15, each first folding plate 18 connected to the same shaft 16 as the pinion 15 presses the upper end surface 18a against the lower surface of the first ear piece D ₂ ′ and presses it upwards. Rotate in the standing direction toward the plate C. At this time, as shown in FIG. 5 (a), the first ear piece D ₂ ′ is pushed up by the first folding plate 18 and the side wall continuous with the first ear piece D ₂ ′. D ₂ is the bottom wall D ₁
It is bent through the crease line and and stands up.

Then, when the horizontal lift bar 4 rises and the upper end surfaces of the guide cylinders 5, 5 come into contact with the lower surfaces of the rack holders 12, 12, as shown in FIGS. 4 (c) and 5 (b), 1 folding board 18
Is about 90 degrees from the horizontal state and is standing upright, and the side wall D ₂
And the first ear piece D ₂ ′ stands upright at a right angle to the bottom wall D ₁ , and the side wall
The folding assisting plate 18c is in contact with the outer surface of D ₂ . On the other hand, the end face 18a of each of the first folding plate 18, 18, 18a and the inner portion thereof is 'presses the second lug D _2' second lug D ₂ across the H-shaped partition plate C the It is folded at a substantially right angle until the part and the end surface are close to each other. Thereby, the side wall D ₂ and the first ear piece
The folding of D ₂ ′ is completed.

Further, when the vertical lift body 3 and the horizontal lift bar 4 are lifted by the cylinder 1, the guide cylinders 5, 5 are lifted while pushing up the rack holders 12, 12 against the action of the coil springs 13, 13. At this time, since the rack holders 12 and 12 also rise together with the pinions 15 and 15, the pinions 15 and 15 do not rotate, so that the first folding plates 18 and 18 continue to hold the upright state.

On the other hand, as the vertical lift body 3 rises, the second folding plate 19 rises while contacting the lower surface of the second ear piece D ₁ ′ of the bottom wall D ₁ . Prior to this, when the guide cylinders 5, 5 contact the rack holders 12, 12, the restricting member 20 contacts the upper surface of the bottom wall D ₁ and restricts further rise. Therefore, as shown in FIG. 6 (B), the second folding plate 19 is relatively raised with respect to the bottom wall D ₁ and gradually raises the second ear piece D ₁ ′.

When the vertical lift body 3 further rises and reaches the state of FIG. 4 (d), as shown in FIG. 5 (c) and FIG. 6 (c), the second ear of the bottom wall D ₁ of the plate material D ′ is The piece D ₁ ′ is the first ear piece of the side wall D ₂ .
D ₂ ′ and the outer surface of the H-shaped ends of the partition plate C are brought into contact with each other, and the inner surface is bonded with an adhesive (not shown). When the second earpiece D ₁ ′ is folded by the second folding plate 19, the upper surface of the bottom wall D ₁ of the box body D is restricted by the restricting member 20, but the lower surface thereof is restricted by this restriction. Is a support plate that can be lowered against the biasing force of the coil spring
It is supported by abutting on 19b. This completes the assembly of the box body D.

As described above, according to this embodiment, first, the first folding plates 18 and 1
After 8 completes the folding process of the first ear piece D ₂ ′, D ₂ ′ of the side wall D ₂ , the second folding plate 19 starts the folding process of the second ear piece D ₁ ′ of the bottom wall D ₁ . Therefore, the first ear pieces D ₂ ′ and D ₂ ′ of the side wall D ₂ and the second ear piece D ₁ ′ of the bottom wall D ₁ can be smoothly bent without interfering with each other during the folding process.

(Effect of the Invention) As is apparent from the above, according to the present invention, the first
Since the step of folding the second ear piece of the bottom wall by the second folding plate is started after the step of folding the second ear piece of the side wall by the folding plate is completed, each first ear piece and each second ear piece are folded. Even boxes that overlap each other at this time can be assembled smoothly. Further, the timing of starting the folding process of the second ear piece after completing the folding process of the first ear piece is certain.

[Brief description of drawings]

1 is a front view of the folding device, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIGS. 6 is an explanatory view of the operation mode of the assembly box, FIG. 6 is an explanatory view of the assembly process of the assembly box assembled according to the present invention, and FIG.
FIG. 8 is a partially cutaway perspective view of an assembly box to be assembled according to the present invention, FIG. 8 is a partially enlarged view of the assembly box with the box body unfolded, and FIG. 9 is a conventional assembly box assembly process. Explanatory drawing and FIG. 10 are perspective views of the same assembly box when the assembly is completed. 1 …… Cylinder 3 …… Vertical lift body 4 …… Horizontal lift bar 5,5 …… Guide cylinder 11,11 …… Vertical guide shaft 12 …… Rack holder 13 …… Coil spring 14 …… Rack 15 …… Pinion 16… ... Pinion shaft 18 ... 1st folding plate 18c ... Folding auxiliary plate 19 ... 2nd folding plate 19b ... Support plate 20 ... Regulation member (regulating means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 62-13816 (JP, U) US Patent 4310323 (US, A)

Claims (1)

[Scope of utility model registration request] 1. An intermediate partition plate formed in a substantially H shape in a plan view is horizontally placed on a rectangular bottom wall, and a pair of side walls are connected to left and right edges of the bottom wall via fold lines. Regarding a flat corrugated board material in which first ear pieces are continuously provided to the front and rear edges of each side wall through fold lines, and second ear pieces are continuously provided to the front and rear edges of the bottom wall through fold lines, Each side wall and each first ear piece are erected at right angles to the bottom wall, and after each first ear piece is folded inward toward the partition plate, each second ear piece is folded into the partition plate and folded. An automatic assembling device for an assembling box that folds inward so as to come into contact with each of the first ear pieces, and is a pair of vertical units that are arranged on the front and rear edges of the plate material and are vertically moved up and down by a cylinder fixed to a pedestal. A lift body, and a horizontal lift bar extending in the horizontal direction along the front and rear edges of the plate member at the lower end of each vertical lift body, A pair of guide cylinders standing upright on the horizontal lift bar at a distance from each other, and a vertical guide shaft that is fixed to the frame and slidably extends through each guide cylinder to guide the vertical lift body and the vertical lift bar ascending and descending. , A rack holder that is connected to a coil spring suspended from the upper end of each vertical guide shaft, is externally inserted to each vertical guide shaft, and has a rack that extends vertically to the outer surface, and is horizontally supported by each horizontal lift bar. While the lift bar moves up and down from the lowest position to the position where the guide cylinder contacts the rack holder, the pinion is rotatably driven by meshing with each rack, and the horizontal lift bar is pivotally supported coaxially with each pinion. When it is in the position, it becomes horizontal and contacts the lower surface of each first ear piece of the plate member, and as the horizontal lift bar moves up and the pinion rotates, each first ear piece moves. Of the first folding plate, which oscillates in the standing direction while pressing the lower surface of the first folding plate, and folds the first ear pieces inward at substantially right angles to the side walls, and the first folding plates provided on the first folding plates. Swing with the plate,
When each first folding plate folds each first ear piece inward with respect to each side wall, it abuts the outer surface of each side wall and swings in the standing direction,
When each guide tube comes into contact with the rack holder and rotation of the pinion is stopped, the folding auxiliary plate that raises each side wall at a right angle to the bottom wall, and each guide tube moves to the rack holder as the horizontal lift bar rises. When the rack holder is pushed up against the coil springs after being abutted to ascend and rises, a regulating member that abuts against the bottom wall of the plate material that rises along with the horizontal lift bar from above to regulate the rise of the bottom wall, and The second ears are connected to the vertical lift bodies between the first folding plates, come into contact with the lower surfaces of the second ear pieces of the plate material, and move up and down together with the horizontal lift bar, and even after the bottom wall is restricted from rising by the restriction member. A second folding plate that supports the piece and continues to rise, and folds each second ear piece so as to abut the middle partition plate and each first ear piece; and a vertical folding plate that is positioned below the bottom wall of the plate material. Second fold connected to the lift body Automatic assembly apparatus for assembling boxes, characterized in that a support plate for supporting the bottom wall of the plate material folded each second lug by.