JPH0872224A - Perfecting press - Google Patents

Abstract

PURPOSE: To apply printing to both surfaces of a flat material to be printed by reversing both upper and rear surfaces of the material to be printed supported on a transfer belt to be fed from a first printing position to support the material to be printed on the transfer belt toward a second printing position. CONSTITUTION: A reversal part 4 is arranged to the space between both transfer belts 1a, 1a to be opened outwardly in a radius direction and equipped with two receiving parts 4a, 4a each having a recessed cross section holding a case C in an accessible manner in the radius direction and the reversing motor 36 rotating the receiving parts 4a, 4a around the horizontal axis crossing the transfer direction of the case C at a right angle. The case C on the transfer belts 1a, 1a transferred from a first printing position A is received in the receiving parts 4a in a feed direction M and the receiving parts 4a are rotated by half by the reversing motor 36 to again support the case C reversed in the upper space of the transfer belts 1a, 1a on the transfer belts 1a, 1a. The case C is held in the receiving parts 4a so as to be made separable in the transfer direction M toward a second printing position B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat substrate to be printed,
For example, the present invention relates to a double-sided printing device that prints a predetermined display on both sides of a flat rectangular case for mounting on a fan belt for automobiles.

[0002]

2. Description of the Related Art Generally, a fan belt for an automobile is shipped in a state in which a rectangular tubular case having a rectangular cross section with both ends opened is attached, and a belt shape, a pitch circumferential length, Lot number etc. are printed and displayed. A relatively large blank field is provided at the place where such printing is performed, and printing for this blank field is performed in a state where the case is not flattened into a rectangular cross section but is flatly folded. The printing is performed so that the printing does not extend outside the margin.

At this time, in order to arrange the indications on the surfaces of the cases which are back to back in the three-dimensional state of the case, it is necessary to print on both sides of the flat case.

[0004]

By the way, the above-mentioned printing work is conventionally performed by manually stamping a predetermined rubber stamp on a large number of cases arranged on the workbench. In addition, the work efficiency is low, and it is one of the necks in reducing the product cost of the fan belt.
In addition, when printing on both sides, the work of turning over the case is added, which further reduces the work efficiency.

Therefore, it is conceivable to mechanize the printing operation by using a double-sided printing device capable of printing on both sides of the material to be printed. However, the printing precision of the printing operation on the fan belt case is rough, and the quality is excessive in a commercially available double-sided printing device, and it is expensive because of the high precision. Therefore, even if the printing operation is mechanized by such an expensive double-sided printing apparatus, the expected cost reduction cannot be obtained, but the cost is increased.

The present invention has been made in view of the above points, and its main purpose is to print a flat print, such as a flat rectangular box case to be mounted on an automobile fan belt. The purpose of the present invention is to provide a double-sided printing device having a simple structure capable of printing on each of both sides of the body so that the mechanization of the printing operation can be realized at a low cost.

[0007]

In order to achieve the above object, according to the invention of claim 1, the material to be printed is transferred horizontally by a transfer belt, and printing is performed at two printing positions before and after the transfer. Printing was performed on the upper side of the body, and the body to be printed was reversed between the two printing positions so that the upper side was replaced.

More specifically, the present invention is premised on a double-sided printing apparatus that sequentially prints on both sides of a flat printing medium.

Then, the printing medium is supported on the transfer belt in a horizontal posture in which one surface thereof faces upward and the other surface thereof faces downward, and the traveling of the transfer belt causes horizontal movement of the printed materials one by one along the transfer path. In the direction, first printing means for performing predetermined printing on the upward surface of the printing material that has been transported to the first printing position on the transfer path start end side, and second printing on the transfer path end side A second printing unit that performs a predetermined printing on the upward surface of the printing material that has been transferred to the position, and a transfer path provided between the first and second printing positions, and is supported on the transfer belt from the first printing position. And a reversing unit for reversing the upper and lower surfaces of the printing medium transferred while being conveyed and supporting it on the transfer belt toward the second printing position.

According to a second aspect of the present invention, in the first aspect of the present invention, the object to be printed is a flat case-shaped rectangular tube case that is folded and attached to an automobile fan belt.

According to a third aspect of the present invention, in the first aspect of the present invention, the number of the transfer belts is two, and when the transfer belts are arranged in a pair on both sides with a space portion having a predetermined width interposed therebetween, they are reversed. The means is arranged in the space portion and is open outward in the radial direction, and has a concave-shaped accommodating section for holding the object to be printed in the radial direction, and the accommodating section. A reversing drive means for rotating about a horizontal axis that is orthogonal to the transfer direction of the transfer belt, and the storage portion stores the print medium on the transfer belt transferred from the first printing position in the transfer direction. A half rotation of the accommodating portion is performed by the reversing drive means to support the reversible printing material in the space above the transfer belt on the transfer belt, and transfer the printing material into the storage portion toward the second printing position. Is configured to be retained detachably in the direction And the.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the number of the accommodating portions of the reversing means is an even number and they are arranged at equal intervals in the rotation direction.

According to a fifth aspect of the invention, in the first aspect of the invention, each of the first and second printing means is arranged so as to be able to move up and down above the transfer belt, and a predetermined plate portion is provided on the lower end surface. A plate body, and a printing elevating means for moving the plate body up and down to press the plate portion against the printing material on the transfer belt at the lower end position thereof, and the plate body supported swingably on the plate side. A plate-forming part having a plate-forming part for forming a printing ink and an engaging part for rocking the plate-like body, and a fixed side for engaging with the engaging part of the plate-forming body. Is provided,
When the plate body moves up, the carcass part is moved to the carcass part where the carcass part comes into contact with the plate part, while when the plate body goes down, the carcass part is retracted obliquely upward from the plate part. And a cam member for inking to move to the retracted position.

According to a sixth aspect of the invention, in the fifth aspect of the invention, the printing elevating means of the first and second printing means are:
It is assumed that they are shared with each other.

According to a seventh aspect of the invention, in the fifth aspect of the invention, the printing elevating means is a printing drive means provided on the fixed side, and a crank member rotationally driven by the printing drive means. One end is pivotally attached to the crank member, and the other end is a link member pivotally attached to the plate side.

According to an eighth aspect of the present invention, there is provided the first and second detecting means according to the first aspect of the present invention, which detect that the printing medium has reached the first and second printing positions, respectively. The transfer means is controlled so that the traveling of the transfer belt is stopped when it is detected by the second detection means that the printed material has reached the first and second printing positions, respectively, and then the printed material is transferred to the printed material. And a control unit that controls the first and second printing units so that the printing operation is performed.

According to a ninth aspect of the present invention, in the eighth aspect of the invention, the control means controls the transfer means so that the traveling of the transfer belt is restarted after the printing operation is performed on the printing medium. It is assumed to be configured.

According to a tenth aspect of the present invention, in the above-described ninth aspect, first and second regulating means for regulating the movement of the object to be printed in the transport direction from the first and second printing positions respectively are provided. To Then, the control means releases the regulation state after the traveling of the transfer belt is stopped when the first and second detection means detect that the printing medium has reached the first and second printing positions, respectively. As described above, it is assumed that the first and second regulating means are controlled.

According to an eleventh aspect of the invention, in the above tenth aspect of the invention, each of the first and second restricting means projects into the upper surface space of the transfer belt and is engageable with the front edge of the printing medium in the transfer direction. A pin member and a regulation moving means for moving the pin member in and out of the upper surface space are provided.

According to a twelfth aspect of the present invention, in the above-mentioned eleventh aspect of the invention, the restricting moving means of the first and second restricting means are commonly used.

According to a thirteenth aspect of the present invention, in the eleventh aspect of the present invention, the restricting moving means is rotationally driven by the restricting driving means provided on the fixed side and the restricting driving means so as to rotate around the rotation axis. And a regulating cam member having a cam surface on its side circumference, and a pin member side slidably brought into contact with the cam surface of the regulating cam member, and by rotating the regulating cam member, the pin member moves in and out. It has a moving body to move.

According to a fourteenth aspect of the present invention, in the above tenth aspect of the present invention, a reversing portion detecting means for detecting that the printing medium has reached an inversion position which is inverted by the inversion means is provided. Then, the control means controls the first and second restricting means so that the first and second restricting means are brought into the restricted state when the inversion part detecting means detects that the printing medium reaches the inversion position. It has been done.

According to a fifteenth aspect of the present invention, in the above-described fourteenth aspect, the feeding means for feeding the printing medium one by one is provided at the starting end of the feeding path of the feeding means. The control means is configured to control the supply means so that the printing medium is supplied when the inverting unit detecting means detects that the printing medium has reached the inverting position. To do.

[0024]

With the above construction, in the invention of claim 1, the printing medium is supported on the transfer belt of the transfer means, and the transfer belt travels to transfer one by one in the horizontal direction. Then, at the first printing position on the transfer path start end side, by the first printing means, and at the second printing position on the transfer path end side, the second printing position is set.
Predetermined printing is performed by the printing means on the upward surface of the printing medium.

At this time, in the transfer path between the first and second printing positions, the printing material transferred from the first printing position while being supported on the transfer belt has its upper and lower surfaces switched to each other. And is supported by the transfer belt toward the second printing position. Therefore, the downward surface, which has not been printed by the first printing unit at the first printing position, becomes the upward surface at the second printing position, and is printed by the second printing unit.

Therefore, although the structure is simple, it is possible to sequentially print on both sides of the material to be printed, so that the double-sided printing work with rough printing accuracy can be mechanized at low cost, and the efficiency of the printing work can be improved.

According to the second aspect of the present invention, the object to be printed is a flat case-folded rectangular tube case to be mounted on a fan belt for automobiles. Therefore, double-sided printing work on the rectangular tube case is performed. The efficiency of can be improved and the product cost of the fan belt for automobiles can be reduced.

According to the third aspect of the invention, in the transfer path between the first and second printing positions, the object to be printed transferred from the first printing position while being supported by a pair of transfer belts on both sides is As the transfer belt runs, the transfer belt stores the transfer belt in the transfer direction. By half-rotating the accommodating section about the horizontal axis orthogonal to the transfer direction by the reversing drive means, the material to be printed in the accommodating section is reversed in the space above the transfer belt and is supported again on the transfer belt. It Then, the printing object held in the accommodating section is separated from the accommodating section in the transfer direction by the traveling of the transfer belt and is transferred toward the second printing position. Therefore, since the printed material is accommodated in the accommodation portion and is separated from the accommodation portion by using the traveling of the transfer belt, there is no need for a dedicated drive means for holding the printed material, and the corresponding amount of the apparatus is required. The structure can be simplified and the cost can be reduced. Further, since the accommodating portion is arranged by utilizing the empty space of the transfer belt, it is possible to turn over the object to be printed without hindering the traveling of the transfer belt.

According to a fourth aspect of the present invention, in the above-mentioned reversing means,
A plurality of accommodating portions arranged at equal intervals in the rotation direction are rotated by the inversion drive means. Therefore, since the number of reversing operations per unit time is increased by the number of the accommodating portions, the transfer speed of the printing medium by the transfer means can be increased regardless of the rotation speed of the reversing drive means, and the printing operation can be speeded up. Can be achieved. Further, since the number of the accommodating portions is an even number, when any accommodating portion reaches a position for supporting the print medium on the transfer belt by half rotation, the accommodating portion is located diametrically opposed to the accommodating portion. Since the storage unit is automatically positioned at a position where the printing target from the first printing position can be stored in the transfer direction, the work of reversing the printing target by the reversing unit can be efficiently performed.

According to a fifth aspect of the present invention, at the first and second printing positions, the plate body is moved downward from above the transfer belt by the printing elevating means, and the plate portion is pressed against the object to be printed on the transfer belt. As a result, predetermined printing is performed by the first and second printing means, respectively. Then, when the plate body is raised, the engaging portion of the inked body is guided by the cam member to move the inked body to the inking position, whereby the inked portion of the inked body comes into contact with the plate portion and printing ink. To the plate portion. On the other hand, when the plate body descends, the engaging portion is guided by the cam member to move the inlaid body to the retracted position, so that the inlaid portion retracts obliquely above the plate portion. It can be pressed against the material to be printed without being disturbed by. As a result, the printing ink is deposited on the plate portion without using a dedicated drive means and without hindering the stamping operation of the plate body.

In the sixth aspect of the invention, since the printing elevating means of the first and second printing means are shared with each other,
For example, one set of main members such as driving means is sufficient, and the structure of the device can be simplified and the cost can be reduced accordingly. In addition, since the printing operations of the first and second printing means are performed in synchronization with each other by mechanical connection, control of the first and second printing means is facilitated.

According to the seventh aspect of the invention, in the above-mentioned printing elevating means, when the crank driving member is rotatably driven by the printing driving member on the fixed side, the link member swings around the pivot point of the plate member side. This allows the crank member to rotate. At this time, since the length of the link member is constant, the crank member rotates while moving the center of rotation in the vertical direction. As a result, the plate body is moved up and down according to the rotation of the crank member.
In the invention, the operation of the printing elevating means is specifically carried out.

In the eighth aspect of the present invention, when each of the printed materials reaches the first and second printing positions, the fact is detected by the first and second detecting means, respectively. At this time, the control means controls the transfer means to stop the traveling of the transfer belt. Then, the first and second printing means are controlled to perform the printing operation on each printing medium. As a result, when the printing medium is transferred to the first and second printing positions, it is automatically stopped at that position and predetermined printing is automatically performed.

According to the ninth aspect of the invention, after the printing operation on the printing medium by the first and second printing means is performed, the control means controls the transfer means to restart the traveling of the transfer belt. Therefore, the printing material on which the predetermined printing is performed at the first and second printing positions is automatically restarted when the printing is completed.

According to a tenth aspect of the invention, the first and second aspects are provided.
Each of the printing materials that have reached the printing position is restricted by the first and second restricting means from moving in the transport direction from the first and second printing positions. Then, when it is detected by the first and second detection means that each printing medium has reached the first and second printing positions, after the traveling of the transfer belt is stopped, the first and second control means are operated by the control means. 2 The restricting means is controlled and the restricted state is released. As a result, each printing medium is stopped at the first and second printing positions regardless of the delay in the stop time of the transfer belt. In addition, the above regulation status is
After the transfer belt is stopped, it is released without waiting for the printing operation by the first and second printing means to be completed, so that the time required for one printing operation of the first and second printing means is shortened. Therefore, the working efficiency of the device can be improved.

In the eleventh aspect of the invention, the first and second aspects are provided.
In the restricting means, the pin member is moved in and out of the upper space of the transfer belt by the restricting moving means. The pin member projects into the upper surface space and engages with the front edge of the printing medium in the transport direction, whereby movement of the printing medium in the transport direction is restricted at the first and second printing positions. As a result, the action of the invention of claim 10 is carried out specifically.

In the twelfth aspect of the invention, the first and second aspects are provided.
Since the restricting moving means of the restricting means are shared with each other, for example, one set of main members such as the driving means is sufficient, and the structure of the apparatus can be simplified and the cost can be reduced accordingly. Not only that, the printing operations of the first and second restricting means are performed in synchronization with each other by mechanical connection, so that the control of the first and second restricting means is facilitated.

According to the thirteenth aspect of the present invention, in the regulating moving means, when the cam member is rotationally driven by the regulating driving means on the fixed side, the cam surface of the cam member makes sliding contact with the moving body on the pin member side. As a result, the pin member is moved in the protruding / retracting direction. As a result, in the invention of claim 11, the operation of the restricting moving means is specifically carried out.

According to a fourteenth aspect of the present invention, the printing medium is
When the reversal position reached by the reversing unit is reached, the fact is detected by the reversing unit detecting unit. At this time, the control means controls the first and second regulating means to bring them into the regulated state again. Therefore, each of the printing materials that have been stationary at the first and second printing positions moves in the transport direction from the first and second printing positions, and the printing material at the first printing position moves to the second printing position. Since the first and second regulating means are in the regulated state at a stage where it is certain that the target has not been reached yet, the first and second regulating means can be provided for each of the printing mediums that are respectively transferred to the first and second printing positions. The operation of the first and second regulating means is performed without hindering the transfer of the material to be printed.

According to the fifteenth aspect of the present invention, the printing medium is supplied one by one to the starting end of the transfer path of the transfer means by the supply means. Then, when the printing medium at the first printing position reaches the reversal position, that is, when the traveling of the transfer belt in the transfer unit is restarted and the first restricting unit is in the restricting state, the control unit controls Then, the printing medium is supplied from the supply means, so that the printing medium is supplied at an appropriate timing.

[0041]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall configuration of a double-sided printing device according to an embodiment, which is a belt-shaped or flat-shaped case that is flatly folded for attachment to an automobile fan belt. It is used when printing the pitch circumference, lot number, etc. in order.

The above-mentioned double-sided printing apparatus supports the case c on a pair of transfer belts 1a, 1a on both sides in a horizontal posture in which one surface faces upward and the other surface faces downward, and the transfer belts 1a, 1a. The transport unit 1 transports one by one in the horizontal direction (the direction of arrow M in FIGS. 1 and 2, hereinafter referred to as the transport direction M) along the transport path, and the transport path start end side (the same drawings). The first printing unit 2 that performs predetermined printing on the upward surface of the case c that has been transferred to the first printing position A on the right end side).
A second printing unit 3 for performing a predetermined printing on the upward surface of the case c transferred to the second printing position B on the end side of the transfer path (the left end side in each drawing), and the first and second Print position A, B
The case c, which is provided on the transfer path between and is transferred from the first printing position A while being supported on the transfer belts 1a, 1a, is inverted so that the upper and lower surfaces thereof are switched and transferred to the second printing position B. The belt 1a is provided with a reversing unit 4 supported on the belt 1a. In addition, case c is the first
And when the second printing position A, B is reached, the transfer belt 1
a and 1a are stopped to cause the first and second printing units 2 and 3 to perform the printing operation on the case c, and when the printing operation is completed, the traveling of the transfer belts 1a and 1a is restarted. A control unit 5 for controlling in this way and a supply unit 6 which is provided at the rear of the transfer unit 1 in the transfer direction M and supplies the case c one by one to the transfer path start end of the transfer unit 1.

On both sides of the transfer path starting end of the transfer section 1, both sides 1
Two driven pulleys 8a, 8 are rotatably supported by a pair of bearings 7, 7 about a horizontal axis orthogonal to the transfer direction M.
A driven shaft 8 is provided, which has a rotationally integrated parts a. On the other hand, on the end side of the transfer path, a pair of bearings 9
Thus, there is provided a drive shaft 10 that is rotatably supported around an axis parallel to the driven shaft 8 and that has two drive pulleys 10a and 10a integrally and rotatably. And
A pair of front and rear drive pulleys 10a in the transfer direction M, respectively.
The transfer belt 1a is wound between the driven pulley 8a and the driven pulley 8a so as to run. An output shaft of the transfer motor 11 is drivingly connected to one end (upper end in FIG. 1) of the drive shaft 10.

The first printing unit 2 includes transfer belts 1a, 1
a plate body 12 which is arranged so as to be able to move up and down above a and has a predetermined plate portion 12a provided on its lower end surface, and this plate body 12 is moved up and down to lower the plate portion 12a on the transfer belts 1a, 1a. It has a printing elevating unit 13 as a printing elevating unit that is pressed against the case c. Then, the printing elevation unit 13
Is provided on a rectangular printing elevating body 14 that is vertically movable and to which the plate body 12 is integrally connected in an elevating manner, and is provided above the printing elevating body 14 and on a support stand 17 as a fixed side. The printing motor 15 is provided between the printing lifting body 14 and the support 17 as a printing driving means for driving the printing lifting body 14 up and down, and the printing motor 1 is provided.
And a printing lifting mechanism section 16 which is driven to move the printing lifting body 14 up and down.

Specifically, the support base 17 has a rectangular shape, and is arranged above both transfer belts 1a, 1a so as to substantially straddle the transfer belts 1a, 1a, as shown in FIG. The support base 17 is provided with a pair of guide holes on both sides that penetrate the support base 17 in the vertical direction. On the other hand, a pair of columns 18 and 18 on both sides are erected on the printing elevator 14 and the columns 18 and 18 are inserted into the respective guide holes, so that the printing elevator 14 is It is guided and supported so that it can be raised and lowered. Two plate bodies 12, 12 are arranged in the first printing unit 2, and are connected and fixed to the left side and the rear side of the printing elevating body 14 in the transport direction M, respectively.

The printing lift mechanism 16 includes a support base 17
A crank disk 19 as a crank member disposed above and driven to rotate by a printing motor 15, one end of which is pivotally attached to the peripheral edge of the crank disk 19, and the other end of which is attached to the printing lifter 14. The link member 20 is pivotally attached. The crank disk 19 is rotatably integrated with one end (the left end in FIGS. 1 and 2) of a support shaft 22 on which a bearing 21 provided on a support 17 is rotatably supported around an axis extending in the transfer direction M. It is connected. Further, a driven pulley 23 is rotatably connected to the other end of the support shaft 22 (right end in each drawing). On the other hand, a drive pulley 24 is drivingly connected to the output shaft of the printing motor 15. The transmission belt 2 is provided between the drive pulley 24 and the driven pulley 23.
5 is wound so that it can travel, and the crank disk 19 is driven to rotate by these.

Further, as shown in FIG. 4 and FIG. 5, the first printing unit 2 is provided on the inking body 27 which is swingably supported with respect to the plate body 12 and the support stand 17, and the first printing section 2 of the plate body 12 is provided. And a camming member 28 for moving the meat in the swinging direction according to the vertical movement. The inked body 27 is for inking the plate portion 12a of the plate body 12 with the printing ink, and includes a pad portion 27a which is impregnated with the printing ink and which can come into contact with the plate portion 12a and the inked body 27. An engagement roller 27b for moving in the moving direction is provided. on the other hand,
The cam member 28 is always engaged with the engagement roller 27b of the inking body 27, and when the plate body 12 moves upward,
The pad 27 is brought into contact with the plate portion 12a by moving the pad 27 to the pad position shown in (a). On the other hand, when the plate body 12 descends, it is moved to the retracted position shown in FIG. 5B to retract the pad portion 27a obliquely above the plate portion 12a.

Specifically, the plate body 12 is fixedly connected to the printing elevator 14 via a bracket 32.
The plate body 12 is configured such that printing elements such as alphabetic characters and Roman numerals are provided on each outer circumference of a plurality of rubber belts, and by moving each rubber belt in the circumferential direction, a combination of printing elements in the plate portion 12a. Is adjustable.

The body 27 has a pair of arms 2 on both sides.
9 and 29, and a lower side portion 30 that connects the lower end portions of both arm portions 29, 29 in the horizontal direction, are formed in a substantially concave shape. The upper ends of the two arms 29, 29 are pivotally supported by the pivot pins 31, 31 on both sides of the upper portion of the plate 12. The lower side portion 30 has a container shape with an open upper portion, and an ink pad is housed therein to form a pad portion 27a. The engagement roller 27b is rotatably supported on one arm portion 29 about an axis extending in a direction parallel to the swing axis of the body 27.

The cam member 28 has its upper end connected and fixed to the edge of the support base 17, and engages with the engagement roller 27b when the plate 12 descends to move the inked body 27 from the inked position. Retraction cam member 28a for moving to the retreat position
And a thickening cam member 28b that engages with the engagement roller 27b to move the thickening body 27 from the retracted position to the thickening position when the plate 12 moves up.

On the other hand, one plate 12 is arranged in the second printing section 3, and this plate 12 is connected to the printing elevator 14 through a connecting member 26 so as to move up and down. . That is, the printing elevating / lowering units 13 of the first and second printing units 2 and 3 are shared with each other. As a result, only one set of the printing motor 15 and the elevating / lowering mechanism unit 16 provided in the first printing unit 2 is required, and not only the structure of the apparatus can be simplified and the cost can be reduced by that much. The respective printing operations of the first and second printing units 2 and 3 can be synchronized with each other by a mechanical connection, and the first and second printing units 2 and 3 can be performed in synchronization with each other.
The control for 3 can be facilitated.

The reversing section 4 has two transfer belts 1 respectively.
two accommodation parts 4a, 4a, which are arranged in the space between a and 1a and which are open outward in the radial direction and hold the case c in the radial direction so that the case c can be put in and out, and these accommodation parts 4a, 4a The parts 4a, 4a are provided with a reversing motor 36 for rotating the parts 4a around a horizontal axis that is orthogonal to the transfer direction M of the case c. Then, after the housing parts 4a house the case c on the transfer belts 1a, 1a transferred from the first printing position A in the transfer direction M, the housing parts 4a are half-rotated by the reversing motor 36 and transferred. The case c reversed in the space above the belts 1a and 1a is supported again on the transfer belts 1a and 1a, and the case c is held in the accommodating portion 4a so as to be detachable in the transfer direction M toward the second printing position B. It is designed to let you.

Specifically, the accommodating portions 4a, 4a are arranged at equal intervals of 180 ° in the rotational direction. That is, the reversing shaft 33 which is rotatable around the horizontal axis orthogonal to the transfer direction M is provided on the transfer belts 1a and 1a of the transfer unit 1, and these accommodating sections 4a and 4a are orthogonal to the axis. In the direction, the inversion shaft 33 is sandwiched between two flat plate members. Further, the reversing shaft 33 has both sides 1
It is rotatably supported by a pair of bearings 34, 34 about a horizontal axis perpendicular to the transfer direction M, and a driven pulley 35 is rotatably connected to one end (upper end in FIG. 1) of the reversing shaft 33. There is. On the other hand, one side of the transfer unit 1 (upper side of the figure)
Is provided with the reversing motor 36, and a drive pulley 37 is rotatably connected to the output shaft of the reversing motor 36. A transmission belt 38 is rotatably wound around the drive pulley 37 and the driven pulley 35, whereby the accommodating portions 4a, 4a are rotationally driven by half a rotation. Further, above the reversing unit 4, there is a reversing unit sensor 39 as a reversing unit detecting unit that detects that the case c is accommodated in the transporting direction M in the accommodating unit 4a located on the first printing position A side. It is arranged.

Further, the first and second printing positions A and B
The first and second cases restrict the movement of the case c in the transfer direction M from the first and second printing positions A and B, respectively.
Regulators 40 and 41 are provided. These regulatory parts 4
0 and 41 are a pair of pin members 42 and 42 on both sides which project from below into the upper space of the transfer belts 1a and 1a and are engageable with the front edge of the transfer direction M of the case c, and these pin members 4 respectively.
2 and 42 are provided with a restricting elevating / lowering part 43 as a restricting moving unit that moves the devices 2 and 42 into and out of the upper surface space, and by doing so, it is possible to prevent a printing error due to misalignment.

Further, the regulating elevating / lowering portion 43 is provided so as to be able to ascend / descend, and is provided on the fixed side with a regulating elevating / lowering body 44 as a moving body in which the pin members 42, 42 are integrally connected in an elevating manner. A restricting motor 45 as a restricting drive means for vertically driving the elevating / lowering body 44 and a restricting motor 45 provided between the restricting motor 45 and the restricting elevating / lowering body 44 and driven by the restricting motor 45. And a restricting cam member 46 that operates so as to vertically move the elevator body 44. The cam member 46 is provided with a cam surface 46a on the side circumference around the rotation axis, and is driven to rotate by the restriction motor 45 so that the cam surface 46a is brought into sliding contact with the lower surface of the restriction elevating body 44. Thus, the regulating elevating body 44 is moved up and down.

Then, the first and second restricting portions 40, 4 are
Since the restriction elevating part 43 of 1 is shared with each other, only one set of the elevating body 44 for restriction, the motor 45 and the cam member 46 is required, and not only the structure of the device can be simplified and the cost can be reduced. Since the restricting operations of the restricting portions 40 and 41 are mechanically linked and are synchronized with each other, control of the entire apparatus can be facilitated. Further, above and above the rear side in the transfer direction M of the first and second restricting portions 40 and 41, the first and second cases for detecting that the case c has reached the first and second printing positions A and B, respectively. First and second sensors 47 and 48 as two detecting means are arranged.

The supply section 6 is a pair of supply belts 6 on both sides.
A box-like box 50 having a and 6a and partitioning the three sides of the both sides and the front in the feeding direction F into a concave shape in cross section with a gap of approximately the thickness of the case c on the feeding belts 6a and 6a. It is arranged and configured. The supply belts 6a, 6a are
A pair of driven shafts 52, which are rotatably supported on a front end side in the supply direction F by a pair of bearings 51, 51 rotatably around an axis extending in a horizontal direction orthogonal to the supply direction F, have a pair of driven sides. The pulleys 52a, 52a and the drive shaft 54, which is rotatably supported around the axis parallel to the driven shaft 52 by a pair of bearings 53, 53 on the rear end side in the supply direction F, are integrally rotatable. It is wound around the pair of drive pulleys 54a, 54a. The output shaft of the supply motor 55 is drivingly connected to one end of the drive shaft 54.

The supply belts 6a, 6 of the supply unit 6 are also
Between the a and the transfer belts 1a, 1a of the transfer unit 1, an intermediate roll 56 that is rotatable while supporting the case c supplied from the supply unit 6 from below is provided with a pair of bearings 57, 57 on both sides.
It is rotatably supported by. This intermediate roll 56
A supply sensor 58 for detecting that the case c has reached the starting end of the transfer path of the transfer section 1 is provided near the upper part of the. In this embodiment, the transfer belt 1a in the transfer unit 1
And the traveling speed of the supply belt 6a in the supply unit 6 is set to 2: 1. Further, while the weight bar 59 is placed on the cases c, c, ... Stored in the box 50, the weight bar 59 is located below the box 50 at a predetermined distance. A proximity sensor 60 that detects that the user has done so is arranged.

Further, the box 5 in the supply section 6 is
0 in the feeding direction F front side, the transporting direction M of the transporting unit 1 in the transporting direction M start end side, and the connecting member 26 in the transporting direction M.
Arm portions 61 that are rotatable around an axis in the horizontal direction orthogonal to the supply direction F or the transfer direction M are respectively provided at four positions on the terminal end side and the transfer path end. A pressing roller 62 that is rotatable around an axis parallel to the axis is provided at the tip, and the flat state of the case c is maintained at each of the points.

The control unit 5 includes an inversion unit sensor 39, a first sensor 47, a second sensor 48, and a supply sensor 5.
8 and the proximity sensor 60 are connected so that each detection signal can be input. Then, based on these detection signals, the control unit 5
Is a transfer motor 11 of the transfer unit 1, a printing motor 15 shared by the first and second printing units 2 and 3, and a reversing unit 4.
The control signal is output to the reversing motor 36, the regulating motor 45 shared by the first and second regulating portions 40 and 41, and the supply motor 55 of the supply portion 6.

That is, the first and second sensors 47,
When the case c has detected that the case c has reached the first and second printing positions A and B, respectively, and when the detection signals are ON, first, the transfer motor is stopped so that the traveling of the transfer belts 1a and 1a is stopped. 11 control, then case c
The printing motor 15 is controlled so that the printing operation is performed. Then, after controlling the printing motor 15 so that the plate 12 is moved up and down by one reciprocation between the rising end position and the falling end position for each printing operation, the transfer belt 1a,
The transfer motor 11 is controlled so that the traveling of 1a is restarted. When the detection signals of the first and second sensors 47 and 48 are ON, the regulation motor 45 is controlled so that the regulation state is released after the traveling of the transfer belts 1a and 1a is stopped.

Further, when the reversing unit sensor 39 detects that the case c is accommodated in the accommodating portion 4a and the detection signal is ON, the traveling of the transfer belts 1a and 1a is stopped and the supply of the supply portion 6 is performed. The belts 6a, 6a are run. On the other hand, the case c
When it is detected that has reached the beginning of the transfer path and the detection signal is ON, the transfer belts 1a, 1a are made to run and the supply belts 6a, 6a are stopped. Then, by the proximity sensor 60, the box 5 of the supply unit 6
When it is detected that the remaining amount of the cases c, c, ... Within 0 is less than a predetermined value and the detection signal is ON,
In addition to stopping the operation of all the motors 15, 36, 45 and 55, a replenishment signal is issued and the case c
Will be informed that it is necessary to replenish.

Here, the processing operation in the control unit 5 will be described with reference to the flowcharts of FIGS. 6 and 7.

First, in step S1 of FIG. 6, as an initial setting, each plate 12 of the first and second printing units 2 and 3 is positioned at the rising end position, and the first and second regulating units 4 are placed.
The pin members 42 of 0 and 41 are projected. And
After the supply belts 6a, 6a of the supply unit 6 are run in step S2, the process proceeds to step S3. In this step S3, it is determined that the detection signal of the supply sensor 58 is ON. When the determination is NO, the process proceeds to step S4, waits for a predetermined time, and then returns to step S3. on the other hand,
When the determination is YES, the process proceeds to step S5.

In step S5, the supply belts 6a,
6a is stopped, while the transfer belt 1 of the transfer unit 1 is stopped.
a and 1a are run, and the process proceeds to step S6. In step S6, it is determined that the detection signal of the first sensor 47 is ON. When the determination is NO, the process proceeds to step S7, waits for a predetermined time, and then returns to step S6. On the other hand, if the determination is YES, step S in FIG.
Go to 8.

In step S8, the transfer belt 1a,
The traveling of 1a is stopped, and the process proceeds to step S9. In step S9, each pin member 42 is retracted, and each plate 12 is moved up and down by one reciprocation between the rising end position and the falling end position. Then, in step S10, the traveling of the transfer belts 1a and 1a is restarted, and the process proceeds to the next step S11.

In step S11, the reversing section sensor 3
It is detected that the detection signal 9 is ON. Judgment is NO
In the case of, the process proceeds to step S12, waits for a predetermined time, and then returns to step S11. On the other hand, the judgment is YE
If S, the process proceeds to step S13. Then, in step S13, the accommodating portions 4a, 4a are rotated by half and the respective pin members 42 are projected, and further, the transfer belt 1a,
While the traveling of 1a is stopped, the traveling of the supply belts 6a, 6a is restarted, and then the process proceeds to steps S14 to S18.
These steps S14 to S18 are steps S3 to
Since it is the same as S7, the description is omitted here.

Then, in the next step S19, it is detected that the detection signal of the second sensor 48 is ON. When the determination is NO, the process proceeds to step S20, waits for a predetermined time, and then returns to step S19. On the other hand, when the determination is YES, the process returns to step S8 and the above series of processes is repeated.

By the above processing, when each case c reaches the first and second printing positions A and B, the case c is stopped at that position and a predetermined printing is performed, and when the printing is completed, the transfer is automatically performed. Since it is restarted, double-sided printing work can be performed efficiently. Further, after each case c is stopped at the first and second printing positions A and B, the movement restriction state for each case c is released, while the case c at the first printing position A is accommodated in the reversing unit 4a. When the first and second
The movement at the printing positions A and B is regulated, and the case c is supplied to the starting end of the transfer path. Therefore, the supply of the case c, the regulation at the first and second printing positions A and B, and the release thereof can be performed at appropriate timing.

Therefore, according to this embodiment, it is possible to print on both sides of the case c in order, though the double-sided printing apparatus can be manufactured at low cost because of its simple structure. Therefore, it is possible to mechanize the double-sided printing work with rough printing accuracy at a low cost, improve the work efficiency, and reduce the product cost of the automobile fan belt.

Further, in the reversing unit 3, one accommodation unit 4
When the two housing parts 4a, 4a are rotated half a turn to invert the case c housed in a, the other housing part 4a is simultaneously positioned in a position where the next case c can be housed. Inversion work of the case c in the unit 4 can be efficiently performed.

In each of the printing units 2 and 3, the inclining member 27 can be moved in the swinging direction between the inking position and the retracted position by utilizing the vertical movement of the plate member 12, and a dedicated drive is provided. Since the printing ink can be deposited on the plate portion 12a without any means and without hindering the imprinting operation of the plate body 12, it is possible to perform clear print display without causing the printing blur due to the ink shortage.

In the above embodiment, the printing elevating unit 13 and the regulating elevating unit 43 are shared between the first and second printing units 2 and 3, but the printing elevating unit 13 is used for each printing unit. You may provide a part and a raising / lowering part for regulation. Further, in that case, the printing operation or the restricting operation between the two printing units may be synchronized with each other, or may be different from each other.

In the above embodiment, the reversing section 4 is provided with the two accommodating sections 4a, 4a.
After the case transferred from the first printing position is inverted and separated toward the second printing position, it may be quickly rotated half a turn to accommodate the next case.

On the contrary, the above-mentioned accommodating portions may be an even number of four or more and they may be arranged at equal intervals in the rotation direction. In this case, the transfer speed of the case c can be increased as compared with the rotation speed of the housing portion.

Further, in the above-mentioned embodiment, the case c is supported while being supported on the pair of transfer belts 1a, 1a on both sides, but it may be carried out by one transfer belt having a wide width. In that case, it is preferable that the case c is supported in a state where both side portions thereof project from the transfer belt because the reversing operation or the like at the reversing portion can be easily performed using the both side portions.

In the above embodiment, the first printing unit 2 prints at the same first printing position A at two positions on one side of the case c using the respective plate bodies 12, but at each printing position. The printing position and the printing unit may be provided in the.

Further, in the above-mentioned embodiment, the rectangular tube case c, which is folded in a flat shape and which is to be attached to the fan belt for automobiles, and which has the opening at both ends, is used as the printing medium, and printing is performed on both sides thereof. Other than the case c, printing can be performed as long as the printing accuracy is the same as that of the case c and there is no problem.

[0079]

As described above, according to the first aspect of the invention, as a double-sided printing device for sequentially printing on both sides of a flat printing material, the printing material is placed in a horizontal posture on a transfer belt. And a transfer means for horizontally transferring the sheets one by one along the transfer path by the traveling of the transfer belt, and to the first printing position on the start end side of the transfer path and the second printing position on the rear end side. First and second printing means for performing predetermined printing on the upward surface of the material to be printed, and a transfer path provided between the first and second printing positions, and supported on the transfer belt from the first printing position. Since the printing medium transferred while being reversed is equipped with a reversing means for reversing the upper and lower sides of the material to be switched and supporting it on the transfer belt toward the second printing position, the structure is simple. Double-sided printing device that can be manufactured at low cost There will, in each of both sides of the case can be printed sequentially, a work to be printed on both sides of the printing substrate at a low cost can be improved work efficiency by mechanization.

According to the second aspect of the present invention, the object to be printed is a flat case folded into a flat shape for mounting on a fan belt for automobiles. Therefore, the efficiency of double-sided printing work on the square case is achieved. It is possible to improve the product cost and reduce the product cost of the fan belt for automobiles.

According to the third aspect of the present invention, the two transfer belts are arranged in a pair on both sides with a space having a predetermined width sandwiched therebetween, while the reversing means is arranged in the space and has a radius. A storage section having a concave cross section for holding the printing medium in a direction so that the printing medium can be put in and out, and a reversing drive means for rotating the storage section around a horizontal axis orthogonal to the transfer direction of the printing medium, The accommodating unit accommodates the printing target on the transfer belt, which has been transferred from the first printing position, in the transfer direction, and then the storage unit is rotated by half to support the inverted printing target on the transfer belt. Since the object to be printed is configured to be detachably held in the accommodation portion in the transport direction toward the second printing position, a dedicated drive unit for holding the object to be printed is not required, and the apparatus is correspondingly provided. It is possible to simplify the structure and reduce the cost. Together, we can reverse the printing substrate without disturbing the travel of the transfer belt.

According to the fourth aspect of the present invention, the number of accommodating portions of the reversing means is an even number, and the accommodating portions are arranged at equal intervals in the rotation direction. Therefore, the number of reversing operations per unit time can be increased by the number of accommodating portions. The printing speed can be increased by increasing the transfer speed of the printing medium by the transfer means regardless of the rotation speed of the reversing drive means, and the number of accommodating portions is an even number. When the portion reaches a position for supporting the object to be printed on the transfer belt by a half rotation, the accommodating portion located diametrically opposite to the accommodating portion can accommodate the object to be printed from the first printing position. The position can be automatically set to the position, and the work of reversing the printing medium by the reversing means can be efficiently performed.

According to the fifth aspect of the present invention, each of the first and second printing means has a plate body provided with a predetermined plate portion on the lower end surface thereof, and a printing elevating means for moving the plate body up and down. When,
When the plate body rises, the plate body is swingably supported and has a carcass part and an engaging part, and the stationary side is provided so as to engage with the engaging part of the carcass. While the moving body to the inking position, while the plate body is provided with a cam member for moving the moving body to the retracted position when descending, without using a dedicated drive means, Moreover, clear printing can be performed by impregnating the printing ink on the plate portion for each printing operation without disturbing the imprinting operation of the plate body.

According to the sixth aspect of the invention, since the printing elevating means of the first and second printing means are shared with each other, the constituent members such as the driving means are sufficient for one set, and the structure of the apparatus. Not only can be simplified and the cost can be reduced, but also the respective printing operations of the first and second printing means can be synchronized with each other by mechanical connection to facilitate the control of the first and second printing means. be able to.

According to the seventh aspect of the invention, the printing elevating means is provided on the fixed side, the printing drive means, the crank member rotatably driven by the printing drive means, and one end of the crank member. Since it has the link member pivotally attached to the plate body and the other end to the plate body side, the operation of the printing elevating means can be specifically obtained in the invention of the fifth aspect.

According to the eighth aspect of the present invention, the first and second detecting means respectively detect that the object to be printed has reached the first and second printing positions.
When the detecting means detects each of them, the control means stops the traveling of the transfer belt to perform the printing operation on the printing medium, so that the printing medium transferred to the first and second printing positions is printed. It is possible to automatically stop the body at that position and automatically perform predetermined printing.

According to the ninth aspect of the invention, the control means restarts the traveling of the transfer belt after the printing operation on the printing medium is completed. Therefore, the first and second printing positions are set to predetermined positions. It is possible to automatically restart the transfer of the printed material after printing.

According to the tenth aspect of the present invention, it is possible to restrict the movement of the material to be printed in the transport direction from the first and second printing positions by the first and second restricting means, respectively, while the material to be printed is When the body reaches the first and second printing positions, the control means cancels the restriction state after the traveling of the transfer belt is stopped, so that each printed material is printed regardless of the delay in the stop time of the transfer belt. Not only can the body be stopped at the first and second printing positions, but the work efficiency of the apparatus can be improved by shortening the time required for one printing operation of the first and second printing means. .

According to the eleventh aspect of the present invention, each of the first and second regulating means is a pin member engageable with the front edge of the printing medium in the transfer direction, and the pin member is projected and retracted in the engagement direction. Since it is provided with a regulation moving means for moving,
In the invention according to the tenth aspect, the movement restriction on the printing medium and the cancellation thereof can be specifically performed.

According to the twelfth aspect of the present invention, since the restricting moving means of the first and second restricting means are shared with each other, for example, one set of main members such as the driving means is sufficient, and the device is correspondingly provided. Not only can the structure be simplified and the cost can be reduced, but also the printing operations of the first and second restricting means can be synchronized with each other by mechanical connection to facilitate control of the first and second restricting means. Can be converted.

According to the thirteenth aspect of the present invention, the regulating moving means is provided on the fixed side, the regulating driving means, the regulating cam member rotatably driven by the regulating driving means, and the cam member. In the invention of claim 11, the pin member can be specifically moved in and out, since the pin member is slidably brought into contact with the cam surface to move the pin member in the retracted direction.

According to the fourteenth aspect of the present invention, the fact that the printing medium has reached the reversing position is detected by the reversing portion detecting means, and when the reversing portion detecting means detects it, the control means Since the first and second restricting means are set in the restricting state, it is possible to restrict the movement of the printing medium at the first and second printing positions without hindering the transfer of the printing medium.

According to the fifteenth aspect of the present invention, the material to be printed is supplied to the starting end of the transfer path by the supplying means, and when the reversing means detects that the material to be printed has reached the reversal position. Since the control means causes the supply means to supply the printing medium, the printing medium can be supplied at an appropriate timing after the printing medium at the first printing position is transferred.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing an overall configuration of a double-sided printing device according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the overall configuration of a double-sided printing device.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged perspective view showing a main part of a printing unit.

FIG. 5 is a side view schematically and stepwise showing the stamping operation of the printing unit.

FIG. 6 is a flowchart showing the first half of the processing operation in the control unit.

FIG. 7 is a flowchart showing the latter half of the processing operation in the control unit.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE SIGNS 1 transfer unit (transfer unit) 1a transfer belt 2 first printing unit (first printing unit) 3 second printing unit (second printing unit) 4 reversing unit (reversing unit) 4a accommodating unit 5 control unit (control unit) 6 Supply unit (supply unit) 12 Plate body 12a Plate unit 13 Elevating unit for printing (Elevating unit for printing) 15 Motor for printing (Drive unit for printing) 17 Support (fixed side) 19 Crank disk (Crank member) 20 Link Member 27 Meat body 27a Pad part (meat part) 27b Engaging roller (engaging part) 28 Meat cam member 32 Reversing motor (reversing drive means) 39 Reversing part sensor (reversing part detecting means) 40 First Restriction part (first restriction means) 41 Second restriction part (second restriction means) 42 Pin member 43 Elevating part for regulation (moving part for regulation) 44 Elevating body for regulation (moving body) 45 Motor for regulation (driving for regulation) Means) 46 rules Control cam member 46a Cam surface 47 First sensor (first detection means) 48 Second sensor (second detection means) A First printing position B Second printing position M Transfer direction c Square tube case (printing object)

Claims (15)

[Claims] 1. A double-sided printing device for sequentially printing on both sides of a flat printing medium, wherein the printing medium is transferred to a horizontal position in which one side faces upward and the other side faces downward. A transfer means that is supported on a belt and horizontally moves one by one along the transfer path by the traveling of the transfer belt, and an upward surface of the printing material transferred to the first printing position on the transfer path start end side. First printing means for performing predetermined printing, second printing means for performing predetermined printing on the upward surface of the printing medium transferred to the second printing position on the end side of the transfer path, and the first and second printing means. It is provided on the transfer path between two printing positions and
And a reversing means for reversing the printed material, which is transferred from the printing position while being supported on the transfer belt, so as to switch the directions of the upper and lower surfaces thereof, and supporting it on the transfer belt toward the second printing position. A double-sided printing device characterized in that 2. The double-sided printing device according to claim 1, wherein the object to be printed is a flat-ended rectangular tube case that is folded in a flat shape for being mounted on an automobile fan belt. Printing device. 3. The double-sided printing apparatus according to claim 1, wherein there are two transfer belts, and the transfer belts are arranged in a pair on both sides with a space portion having a predetermined width therebetween, and the reversing means is provided in the space portion. A housing portion having a concave cross-section, which is arranged and opened outward in the radial direction and holds the object to be printed in and out in the radial direction, and a horizontal direction in which the housing portion is orthogonal to the transfer direction of the object to be printed. A reversing drive means for rotating about the axis, and the accommodating portion accommodates the object to be printed on the transfer belt, which has been transferred from the first printing position, in the transfer direction and then reverses the accommodating portion. The printing medium, which is half-rotated by the driving means and turned over in the space above the transportation belt, is supported on the transportation belt, and the printing medium is held in the accommodating portion so as to be detachable in the transportation direction toward the second printing position. Both sides characterized by being configured as Printing apparatus. 4. The double-sided printing apparatus according to claim 3, wherein the number of accommodating portions of the reversing means is even, and the accommodation portions are arranged at equal intervals in the rotation direction. 5. The double-sided printing device according to claim 1, wherein each of the first and second printing means is arranged so as to be able to move up and down above the transfer belt, and a predetermined plate portion is provided on a lower end surface thereof. And a printing elevating means that moves the plate body up and down and presses the plate part against the printing material on the transfer belt at the lower end position, and is supported swingably on the plate side and is supported by the plate part of the plate body. A meat body having a carcass part for inking the printing ink and an engaging part for rocking the plate body, and a fixed side provided so as to engage with the mating part of the carcass body, When the plate body moves up, the carcass part is moved to the carcass part where the carcass part comes into contact with the plate part, while when the plate body goes down, the carcass part is retracted obliquely upward from the plate part. A double-sided printing device, comprising: a refilling cam member that is moved to a retracted position. 6. The double-sided printing apparatus according to claim 5, wherein the printing elevating means of the first and second printing means are shared with each other. 7. The double-sided printing device according to claim 5, wherein the printing elevating means is a printing driving means provided on a fixed side, a crank member is rotatably driven by the printing driving means, and one end is the above-mentioned. A double-sided printing device, comprising a link member pivotally attached to a crank member and the other end pivotally attached to the plate side. 8. The double-sided printing device according to claim 1, wherein first and second detection means for detecting that the printing medium has reached the first and second printing positions, respectively, and the first and second detection means. When it is detected by the means that the printing medium has reached the first and second printing positions, respectively,
Control means for controlling the transfer means so that the traveling of the transfer belt is stopped, and then controlling the first and second printing means for performing the printing operation on the printing medium. Double-sided printing device. 9. The double-sided printing apparatus according to claim 8, wherein the control means is configured to control the transfer means so that the traveling of the transfer belt is restarted after the printing operation is performed on the printing medium. A double-sided printing device characterized in that 10. The double-sided printing apparatus according to claim 9, further comprising first and second restricting means for restricting movement of the material to be printed from the first and second printing positions in the transport direction, wherein the control means is When the first and second detection means detect that the printing medium has reached the first and second printing positions, respectively, the traveling state of the transfer belt is stopped and then the regulation state is released. A double-sided printing device, characterized in that it is configured to control the first and second regulating means. 11. The double-sided printing device according to claim 10, wherein each of the first and second restricting means includes a pin member projecting into an upper space of the transfer belt and engageable with a front edge in the transfer direction of the printing medium. A double-sided printing apparatus comprising: a restricting moving unit that moves the pin member in and out of the upper surface space. 12. The double-sided printing apparatus according to claim 11, wherein the restriction moving means of the first and second restriction means are shared with each other. 13. The double-sided printing apparatus according to claim 11, wherein the restricting moving means is rotationally driven by the restricting driving means provided on the fixed side and the restricting driving means, and a side circumference around the rotation axis is provided. And a regulating cam member provided with a cam surface on the pin member side so as to slidably contact the cam surface of the regulating cam member on the pin member side, and the movement of moving the pin member in the retracted direction by rotation of the regulating cam member. A double-sided printing device having a body. 14. The double-sided printing apparatus according to claim 10, further comprising a reversing unit detecting unit that detects that the printing medium has reached an inversion position that is reversed by the reversing unit, and the control unit includes the reversing unit detection unit. A double-sided printing apparatus, which is configured to control the first and second restricting means so that the first and second restricting means are brought into a restricted state when it is detected that the printing medium has reached the reverse position. 15. The double-sided printing apparatus according to claim 14, further comprising: a supply unit that supplies the print medium one by one to a transfer path start end of the transfer unit, and the control unit reverses the print medium by the reversal unit detection unit. A double-sided printing apparatus, characterized in that the supply means is controlled so as to supply an object to be printed when it is detected that the position has been reached.