JPH0144500B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing boxes using sheet-like members such as cardboard and plastic sheets.

When manufacturing boxes using sheet-like members, usually a pair of male and female cutting dies are created according to the shape and dimensions of the box, and these dies are used to cut and fold the sheet-like member. forming a line. Although the above method is suitable for mass production of boxes, it has a drawback in that it is not suitable for producing prototypes or small lot boxes because the molds are expensive to produce. Therefore, conventionally, when creating a prototype or small-lot box, an X-Y numerically controlled automatic cutting machine was used to cut the sheet material according to the shape of the box, and then the cutter was replaced with a pressing member. Then, the pressing member is controlled to move in the X-Y coordinate axis direction while being pressed against the sheet-like member, thereby pressing against one side of the sheet-like member 2 on the table 4, as shown in FIG. 7a. A recessed fold line 8 is formed by the pressing force of the member 6. However, the thickness of this portion becomes thinner due to the recess at the portion where the folding line 8 is formed, so when the sheet-like member 2 is made into a box shape as shown in FIG.
The strength of this part was extremely weak, and stress was concentrated in that part, which easily cracked, making it impossible to produce a strong box.

The object of the present invention is to provide a method for manufacturing a box that eliminates the above-mentioned defects, and an apparatus used to carry out the method.

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 10 denotes the body of a head XY numerically controlled machine, which is equipped with a vacuum table 12.

Vacuum table 12 has many ventilation holes 14.
A vacuum chamber 16 (see FIG. 2) is formed below the table 12, and an intake port 18 of the vacuum chamber 16 is connected to an intake device via a tube 20. X formed on fuselage 10
Both ends of a Y coordinate rod 26 are movably mounted on the coordinate rods 22 and 24 via rollers, and both ends of the Y coordinate rod 26 are connected to both sides 28 and 30 of the fuselage 10.
Endless belt (not shown) rotatably arranged in
is fixed. The endless belt rotates along both sides 28 and 30 of the body 10 by rotation of a pulse motor or servo motor MX (not shown), and the rotation of the belt causes the Y coordinate rod 26 to move along the X It moves along the coordinate rods 22 and 24. 32
is a Y cursor movably attached to the Y coordinate interval 26, a pulse motor or servo motor MY (not shown) is built in the casing of this cursor, and a pinion gear fixed to the output shaft of the motor MY is It meshes with a rack gear fixedly installed along the Y coordinate rod 26. The motors MX and XY are controlled by a controller connected to a computer,
Y cursor 3 is rotated by the rotation of the motors MX and MY.
2 is controlled to move in a predetermined direction on the vacuum table 12 within a plane parallel to the vacuum table 12.

The X-Y numerical control mechanism for moving the Y cursor 32 along the X-Y coordinate plane is a well-known mechanism used in automatic drafting machines or automatic cutting machines, so detailed explanation thereof will be omitted. A head 34 is detachably fixed to the Y cursor 32, and the structure inside the casing of this head is shown in FIGS. 2 to 4.

In FIG. 2, reference numeral 36 denotes an elevating body, and a member fixed to the casing 38 moves the table 12 up and down.
Guide groove 4 formed in a direction perpendicular to the surface
0,42 so as to be slidable.

The protrusion of the elevating body 36 is connected to the casing 38
It is loosely fitted into an elongated hole 44 formed in a member 46 fixedly attached to the member 46 . A tube body 48 is fixed to the upper part of the member 46, and a shaft body 50 is slidably fitted thereinto, and a threaded portion formed on the shaft body 50 connects the table 12 to the protrusion of the elevating body 36. It is screwed into a screw hole 52 formed in a direction perpendicular to the plane.
The vertical surface of the large diameter portion of the shaft body 50 abuts the lower end surface of a thrust bearing 54 fitted in the large diameter portion of the tube body 48, and the handle shaft 56 fixed to the shaft body 50
The lower end surface of the pipe body 48 rotatably contacts the upper end surface of the tube body 48 . 58 is a frame fixed to the elevating body 36, and a bottom plate 60 is fixed to the lower end of this frame. Members 62 and 64 are fixed to the upper end surface of the frame 58, and a groove 66 having an L-shaped cross section is formed in the member 62 in a direction perpendicular to the plane of the paper. In the vertical wall surface forming the groove 66, a screw hole is opened through the member 62. 68 is a plate member fixed to the upper surface of the member 62 with a screw, and the member 68
A block member 70 is slidably fitted between the lower surface of the groove 66 and the bottom wall surface forming the groove 66.
A V-groove is formed in the direction perpendicular to the plane of the paper by the inclined surface formed at 0 and the bottom wall surface forming the groove 66.
A V-groove having the same shape as the V-groove is formed on the side surface of the member 64. 72 is a solenoid, and a holding member 7 is provided on the lower surface of its casing.
4 and 76 are fixed, and protrusions formed at the bottom of the holding members 74 and 76 fit into the V-grooves. Reference numeral 78 is a handle shaft, and a threaded portion is formed at the tip of the handle shaft. The threaded portion of the handle shaft 78 is screwed into the threaded hole of the member 62, and the tip of the threaded portion presses the top member 70 in the right direction in the drawing, so that the protruding portions of the holding members 74 and 76 are attached to the wall surface of the V-groove. It is fixed at 80 is an output shaft of the solenoid 72, and a cylinder is fixed to the upper end of the output shaft. 18
2 is a case supported by a casing 38 so as to be slidable in a direction perpendicular to the plane of the paper. Reference numeral 84 denotes an outer cylinder fixed to the upper part of the case 182, and the outer peripheral surface of the inner cylinder 86 is slidably fitted into the upper inner peripheral surface of the outer cylinder. Due to the elasticity of the coil spring disposed on the lower horizontal surface of the outer cylinder 84, the horizontal surface formed on the outer periphery of the inner cylinder 86 is resilient against the lower surface of the cap 88 that is screwed into the outer cylinder 84. are in contact with each other.

A shaft member 90 is fixed to the upper part of the internal cylindrical body 86, and a disk-shaped lower end of the shaft member 90 faces the upper end of the output shaft 80 with an appropriate distance therebetween.

A cylindrical body 82 is fixed to the lower end of the output shaft 80 with a screw. Reference numeral 92 denotes a cylindrical body that fits into a hole transparently provided in the bottom plate 60, and the cylindrical body 92 is fixed to the bottom plate 60. 94 is a cylindrical body that is slidably fitted to the inner peripheral surface of the cylindrical body 92;
The upper surface of the cap 100 is in elastic contact with the lower surface of the cap 100 which is screwed into the cylindrical body 92 by the elastic force of the coil spring 96. Reference numeral 102 designates a tubular body, and a lifting shaft 104 is rotatably attached to the inner peripheral surface of the tubular body via a pair of thrust bearings. Due to the tightening force of the nut 106 screwed into the threaded portion of the lifting shaft 104, the washer fitted into the lifting shaft 104 is pressed against the upper surface of the upper thrust bearing, and the annular shape on the outer circumference of the lifting shaft 104 is pressed. The horizontal surface is pressed against the lower surface of the lower thrust bearing. Said tube body 10
The lower end surface of the tube 102 is in contact with the upper surface of the tube 94, and a tube 108 is fixed to the upper part of the tube 102 with a screw. The lower end surface of the cylinder 82 is in contact with the upper horizontal surface of the cylinder 108 . The upper small diameter portion of the lifting shaft 104 is loosely fitted into the cylinder bodies 82 and 108, and a knob 110 is provided on the upper small diameter portion.
is fixed. Reference numeral 112 denotes a hollow mounting body consisting of a pair of horizontal substrates 114 and 116 disposed at the bottom of the casing 38 and a pair of side walls, and one side wall of the mounting body 112 is attached to the member 46 by screws. It is fixed. The substrate 114,1
An outer tube 118 is loosely fitted into the hole formed in the outer tube 16, and a gear 120 is fixed to the outer peripheral surface of the outer tube 118. Reference numeral 122 designates a tubular body fixed to the base plate 116 with screws, the outer ring of a radial ball bearing 124 fits into the inner circumferential surface of this tube, and the outer circumferential surface of the outer tube 118 fits into the inner circumferential surface of the bearing 124. are mated. The inner ring of the bearing 124 includes a nut 126 that is screwed to the lower part of the outer tube 118 and a collar 1 that is slidably fitted to the outer circumferential surface of the outer tube 118.
28, and thereby the bearing 12
The inner ring of No. 4 is fixed to the outer tube 118. 130
is a tube fixed to the substrate 114 with screws, and a radial ball bearing 1 is mounted on the inner peripheral surface of the tube.
An outer ring 32 is fitted into the bearing 132, and an outer circumferential surface of the outer tube 118 is fitted into the inner circumferential surface of the bearing 132. The inner ring of the bearing 132 is connected to the outer tube 11 by the tightening force of the nut screwed into the outer tube 118.
8, and the inner ring of the bearing 132 is fixed to the outer tube 118. Reference numeral 134 denotes a tubular metal member that is slidably fitted to the inner circumferential surface of the outer tube 118, and the upper end surface thereof is connected to a ring body 136 that is screwed into a thread formed on the inner circumferential surface of the lower end of the outer tube 118. The clamping force presses the outer tube 118 against an annular horizontal surface formed on the inner circumferential surface of the outer tube 118. Reference numeral 138 denotes a tube body fixed to the upper part of the outer tube 118 with a screw, and the large diameter portion of the lift shaft 104 is loosely fitted into the inner peripheral surface of this tube body. A vertical groove 140 is bored in the tubular body 138, into which a pin 142 protruding from the elevating shaft 104 is slidably fitted. The outer peripheral surface of the large diameter portion of the lifting shaft 104 is slidably fitted into the inner peripheral surface of the metal 134. A tool mounting plane is formed at the lower part of the lifting shaft 104, and a screw hole for mounting is opened in the plane. Reference numeral 104' denotes an elevating shaft, which is supported by the casing 38 with the same configuration as that described for the elevating shaft 104 above. Reference numeral 144 denotes a holder plate, which is detachably fixed to the mounting plane of the elevating shaft 104 with screws. A disk-shaped pressing member 146 is rotatably supported at the lower part of the holder plate 144. 148 is a knife,
Along with the mounting plate 150, the lifting shaft 10 is attached by screws.
4' is removably fixed to the mounting plane. 1
52 is a detector fixed to the substrate 114; 154 is a tongue piece fixed to the outer tube 118';
When the through hole formed in 54 reaches a predetermined position of the detector 152, the detector 152 outputs a through hole detection signal, and the detector 152 and the tongue piece 154 detect the origin of the outer tube 118'. It constitutes a detection means.
The detector 152 is connected to a controller.

In FIG. 3, 156 is a direction control servo motor fixed to the board 116, and a gear 158 is fixed to the output shaft of the servo motor, and a gear 158 is rotatably supported between the boards 114 and 116. 1
60 are in mesh. 161 is an intermediate gear fixed to the shaft of the gear 160;
1 meshes with the gear 120 and the gear 120'. An input shaft of a tachometer generator (not shown) is connected to the output shaft of the motor 156.
56 speed signals to the controller. 162 is the motor 15
This encoder converts the rotation of the output shaft of No. 6 into a pulse signal, and the gear fixed to the input shaft of this encoder meshes with the gear 158 via an intermediate gear.
The encoder 162 is for feeding back the amount of rotation of the motor 156 to the controller.

Next, the operation of this embodiment will be explained.

In advance, pattern information of a developed view of a box to be manufactured and a tool control signal are input into an input medium for a computer, such as a paper tape, by means of punching or the like, thereby preparing an input medium for box manufacturing. In addition, pattern information of folding lines and tool control signals in the developed view of the box to be manufactured are inputted into an input medium for a computer, and an input medium for creating a female mold is prepared.

Next, an air-permeable female mold sheet 168, which is a material for the female mold, is placed on the vacuum table 12,
The intake device is driven to fix the female mold sheet 168 to the table 12 surface by intake air. Next, an input medium for making a female mold is set in the input section of the computer, the computer drives a controller, and the controller drives and controls the X-Y head numerical control device. By command of the controller, the head 34
moves in a plane parallel to the surface of the table 12 along the pattern of the fold lines in the box development view. On the other hand, the blade 148 moves up and down with respect to the table 12, and the direction of rotation of the blade 148 is controlled so that the side surface of the blade always faces the direction of travel. As a result, the sheet 168 has parallel cutting lines 170, 1 with a predetermined width at the portion corresponding to the folding line in the developed view of the box to be manufactured, as shown in FIG.
72 is formed. Next, cut the portion of the sheet 168 between the cutting lines 170 and 172 onto the table 1 by hand.
2 Remove from the top. As a result, a thick cutout strip 174 is formed on the sheet 168 at a portion corresponding to the folding line of the developed view of the box to be manufactured.

Next, a sheet-like member 176 of cardboard, plastic, etc., which will be the material of the box to be manufactured, is placed on a female sheet 168.
The sheet-like member 176 is fixed to the surface of the table 12 by suction force.

Next, the input medium for box production is set in the input section of the computer. Next, the controller drives the X-Y head numerical control device to move the head 34 to the female sheet 1 in a plane parallel to the surface of the table 12.
68 along the cutout strips 174, and the pressing member 146 is controlled to move up and down, thereby forming a fold line 178 projecting downward on the sheet-like member 176. When the pressing member 146 descends directly above the notched strip 174 of the female sheet 168 and with the side surface of the pressing member 146 parallel to the longitudinal direction of the notched strip 174, the pressing member 146 touches the sheet-like member 176 to a predetermined depth. The front surface of the sheet-like member 176 is depressed by the amount of the plunge, and the back surface thereof protrudes into the cutout strip 174 of the female sheet 168, as shown in FIG. 6a. In this state, the pressing member 146 moves along the notched line 174 of the female sheet 168. At this time, the pressing member 146 is rotationally controlled so that its side surface is always parallel to the traveling direction. As the pressing member 146 moves along the cutout strip 174, a fold line 178 is formed on the sheet-like member 176, with the back surface protruding by the amount that the front surface is recessed, and whose thickness width is almost the same as the other portions. be done. Next, with the pressing member 146 held in the raised position, the head 34 moves along the outline 180 of the exploded view of the box. On the other hand, the cutter 148 is controlled to move up and down, and the sheet-like member 176 is cut at a portion corresponding to the outline 180 of the developed view of the box. The sheet-like member 176, which has been cut along the outline 180 of the developed view of the box and has a fold line 178 formed at a portion corresponding to the folded part of the box, is removed from the baguage table 12 and then manually cut. It is bent into a box shape by .

Next, the direction control operation of the pressing member 146 will be explained.

The XY motor drive signals supplied from the output section of the controller to the motors MX and MY are vector-combined by a device (not shown) and converted into a signal suitable for driving a servo motor, and this signal is supplied to the servo motor 156. When the output shaft of the servo motor 156 rotates, this rotation causes the gears 158 and 16 to rotate.
0,120 to the outer tube 118. The rotation of the outer tube 118 is controlled by the lifting shaft 104 via the pin 142.
The rotation of the lifting shaft 104 causes the pressing member 146 to have its side surface always parallel to the direction in which the head 34 moves. Similarly, the rotation of the cutter 148 is controlled so that its side surface is always parallel to the direction in which the head 34 moves.

Next, the up-down control operation of the pressing member 146 will be explained.

When the solenoid 72 is excited by a signal from the controller, its output shaft 80 is lowered by a predetermined amount. When the output shaft 80 descends, in conjunction with this,
Cylindrical body 108 Cylindrical body 102 Cylindrical body 94 is a coil spring 96
descends against the elasticity of

As the tubular body 102 descends, the elevating shaft 104 descends along the vertical groove 140, and the lower end of the pressing member 146 comes into pressure contact with the sheet-like member 176. Pressing member 146
Adjustment of the height level of the lower end of the pressing member 146 relative to the vacuum table 12 when the pressing member 146 is lowered is as follows:
This is done by rotating the handle shaft 56. As the handle shaft 56 rotates, the elevating body 36 moves up and down along the guide grooves 40 and 42, and the base plate 60 and the solenoid 72 interlocked therewith move up and down.

When the shaft 90 is pushed down by hand to project the output shaft 80 of the solenoid 72 to the lower limit position, and in this state, for example, the board 60 and the solenoid 72 are lowered, the elevating shaft 104 is moved in conjunction with the lowering of the cylinder 92. It descends along the vertical groove 140, and the pressing member 146 descends toward the vacuum table 12. When the handle shaft 56 is reversely rotated and the elevating body 36 is raised, the board 60 and the solenoid 72 are raised, and the elevating shaft 104
is raised relative to the outer tube 118, and the pressing member 146 is raised relative to the vacuum table 12. As described above, by rotating the handle shaft 56, the lower end level of the pressing member 144 at the lowest point can be set to a desired height, and this level is set to a desired height by rotating the handle shaft 56.
This can be confirmed by lowering the solenoid 72 and protruding the output shaft 80 of the solenoid 72 to the lower limit position.

Adjustment of the lower end level of the cutter 148 at the lowest point and confirmation of the level can be performed in the same manner as above by raising and lowering a separately provided elevating body (not shown) and lowering the shaft (not shown). Can be done.

As is clear from the above description, the solenoid 72, the cylinder 108, the cylinder 102, the cylinder 94, the coil spring 96, and the lifting shaft 104 are connected to the pressing member 14.
6 in two states of raising and lowering with respect to the surface of the vacuum table 12. On the right side of the above structure in FIG. (not shown) is the cutter 14
It constitutes a second driving means for driving the vacuum table 8 into two states of rising and falling relative to the surface of the vacuum table 12.

Incidentally, by gently rotating the handle shaft 78, the holding member 74,
76 along the V-groove, and move the lower part of the vertical axis 104
By moving the solenoid 72 along with the case 182 in the direction perpendicular to the plane of the drawing, the lifting shaft 104 can be pulled out using the knob 110, and the pressing member 14 can be pulled out by holding the knob 110.
6 can be easily replaced. Lifting axis 10
The same applies to the case of 4'.

The lower end level of the cutter 148 when lowered to the lowest level is set to be the same as or slightly lower than the upper surface of the female sheet 168. The lower end level of the pressing member 146 at the lowest point is set at an intermediate position between the upper surface of the sheet-like member 176 and the upper surface of the female sheet 168, as shown in FIG. 6a.

In the present invention, as described above, the head of the head X-Y numerical control device is provided with a cutter and a pressing member, and the cutter and the pressing member can be individually controlled in elevation, so that the sheet can be placed on the vacuum table. The work of fixing the sheet and using a knife to cut the part corresponding to the folded part of the developed view of the box to be made into a sheet to form a cutout strip of a predetermined width on the sheet, and use the sheet as a female mold for making the box. Then, a sheet-like member that will be the material for the box is placed and fixed on top of this female mold, and a pressing member presses the sheet-like member along the notch strips of the female mold, so that the sheet-like member is pressed in the downward direction. It is possible to perform the work of forming a fold line that protrudes from the top of the sheet, and the work of cutting the sheet-like member using a knife along the outline of the expanded view of the box, thereby improving the strength of the fold line without using a cutting die. This has the effect of making it possible to create a strong box.

[Brief explanation of drawings]

The figures show an apparatus used for carrying out the present invention, in which Fig. 1 is an overall external view, Fig. 2 is a sectional view, Fig. 3 is a plan view, Fig. 4 is a plan sectional view, and Fig. 5 is a female sheet. FIG. 6 is an explanatory sectional view, and FIG. 7 is an explanatory diagram of the prior art. 12...Vacuum table, 34...Head, 36...Elevating body, 46...Member, 48...Pipe body, 50...Shaft body, 56...Handle shaft, 72...
... Solenoid, 82 ... Cylinder, 84 ... External cylinder, 86 ... Internal cylinder, 96 ... Coil spring, 104 ... Lifting shaft, 146 ... Pressing member, 1
48...Knife, 168...Female sheet, 174...
... Notch strip, 178 ... Fold line, 176 ... Sheet-like member.

Claims (1)

[Claims] 1. A vacuum table, a head that is supported in a plane parallel to the table so as to be relatively numerically controllable in a predetermined direction, and that is equipped with a blade and a pressing member that can be freely controlled up and down. In the method of manufacturing boxes using a device consisting of Therefore, the sheet for the female mold is automatically cut to a predetermined width to form notched strips, and then the sheet-like member that will become the material for the box is placed and fixed on the sheet for the female mold by air intake. , the pressing member is pressed against the sheet-like member from above the notched strip, and in the pressed state, the pressing member is automatically moved along the notched strip to make a folding line protruding from the lower surface of the sheet-like member. A box is manufactured using a sheet-like member as a material, characterized in that a pattern is formed and the sheet-like member is cut by automatically controlling the movement of a cutter by tracing the outline of a developed view of the box. Method. 2. A vacuum table 12 that fixes a sheet-like member by intake air, and a vacuum table 12 in a predetermined direction relative to the vacuum table 12 within a plane parallel to the surface of the vacuum table 12. A head 34 is supported in a numerically controllable manner, and a head 34 is provided on the head 34 so as to be movable up and down with respect to the surface of the vacuum table 12, for cutting the female mold sheet and the sheet-like member that will be the material for the box. cutlery 14
8, and a vacuum table 12 on the head 34.
Pressing member 146 provided to be able to move up and down with respect to the surface
, a first driving means provided on the head 34 for driving the pressing member 146 into two states of raising and lowering with respect to the surface of the vacuum table 12; and the cutter 148 provided on the head 34.
and a second driving means for driving the vacuum table in two states of raising and lowering relative to the surface of the vacuum table 12.