JPH01236153A - Automatic discharge device for bad carriable sheet - Google Patents

Abstract

PURPOSE:To make it possible to discriminate and discharge a short sheet automatically by providing, between two carrying rollers, a slant guide member for the purpose of guiding the short sheet shorter than a specified length to a sheet discharging gate below a sheet feeding gate. CONSTITUTION:A regular sheet S fed from a sheet feeding gate 21 for manual feed is carried by a first carrying rollers 22 and then received by a second carrying rollers 23 for being carried off via a carrying outlet 33. But, when length of a sheet S is shorter than an interval of two carrying rollers 22 and 23, the sheet S is not received by the second carrying rollers 23 but falls between both carrying rollers 22 and 23 for being guided by a slant guide member 25 to be discharged to a sheet discharging gate 24 provided below the sheet feeding gate 21.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an automatic discharge device for sheets that cannot be transported.

[Prior Art] Conventionally, a thermally expandable sheet on which a desired image is formed using a highly light-absorbing material is continuously irradiated with a light source.
A three-dimensional image forming system is known in which the image is selectively heated and raised. It is also known to form various colored images by forming an image made of thermoplastic resin on paper or film and superimposing a hot stamp tube (manufactured by Murayama Kinpaku Co., Ltd.) on the image. As shown in FIG. 4, for example, the three-dimensional image forming apparatus described above includes a light source 70 fixed at a predetermined position, and a thermally expandable sheet S+ on which a desired image is formed using a material with high light absorption. The feeding guide 71 facing the guiding support t81, the first and second feeding rollers 72, 73 that apply a feeding force to the thermally expandable sheet S1 along the feeding guide 71, and the thermal expansion stagnant on the feeding guide 71. A control unit (
(not shown). The control unit calculates the time required for the leading edge of the thermally expandable sheet $1 to pass through the first Wi feed roller 72 and reach the second feed roller 73 from the distance between the axes and the feed speed of the first and second feed rollers 72 and 73. It is configured to measure and turn off the light a70 when it exceeds 1υ at a specified time. The thermally expandable sheet S1 is such that the image portion absorbs more light than the non-image portion when irradiated by the light source 70, converts the light energy into thermal energy and partially expands, and only the image portion rises. be.

[Problem to be solved by the invention]

In the conventional three-dimensional image forming apparatus, when the thermally expandable sheet S1, which is shorter than the distance between the axes of the first and second conveyance rollers 72 and 73, is fed, the thermally expandable sheet hs+ stagnates on the conveyance guide 71. do.

In such a case, in order to take out the thermally expandable sheet S1, the main body cover must be separated and separated, which is very complicated.

In order to solve the above problem, it may be possible to set the distance between the axes narrower, but since the image area exposed to light is melted and viscous, placing a conveyance roller immediately after the light source will cause problems.
There is a problem that the image, which is still viscous, adheres to the conveying roller or is damaged due to image resolution, and there is also a limit to the ability to narrow the distance between the axes.

The present invention has been devised in view of the above-mentioned problems, and its purpose is to provide a sheet that cannot be transported by automatically identifying and ejecting a short sheet that is less than a predetermined length. Provides an automatic discharge device for covering.

[Means for Solving the Problem] The automatic discharge device for sheets that cannot be conveyed according to the present invention includes a sheet insertion slot for manual insertion, and a sheet inserted through the sheet insertion slot that is set at a predetermined interval. A sheet discharging port provided below the sheet insertion port from which the sheet is ejected, and a sheet discharging port provided between the two transport rollers, which is provided between the two conveyance rollers and the sheet discharging port, which is provided below the sheet insertion port and from which the sheet is ejected. The device is characterized in that it is comprised of an inclined guide member that is guided to the discharge port.

[Function] In the automatic discharge device for sheets that cannot be conveyed according to the present invention, the sheet inserted from the manual sheet insertion slot is conveyed by the first conveyance roller provided at a predetermined interval; First? Before the I-th wi feed roller runs out of conveyance, the receiver is picked up by the 2-m-th roller and conveyed.

However, if the length of the sheet is shorter than the distance between the two conveyance rollers, the first conveyance roller will convey the sheet, and even after conveyance is complete, the leading edge of the sheet will not be caught by the second conveyance roller. . Therefore, the sheet falls from between both of the conveyance rollers without being conveyed by the 21st conveyance roller. As a result, the sheet is guided by the inclined guide member and discharged to the sheet discharge port.

[Example] Hereinafter, specific examples of the present invention will be described with reference to the accompanying drawings.

(First Embodiment) FIG. 1 is a schematic cross-sectional view showing the main parts of a three-dimensional image forming apparatus incorporating an automatic discharge device for sheets that cannot be conveyed according to the present embodiment. This three-dimensional image forming apparatus has a main body 1, an automatic discharge device 2 for sheets that cannot be conveyed, and a heating raised portion 3 as main components.

The main body 1 is box-shaped and has a conveyance passage 11 approximately in the center thereof extending from one side W1a to the other side wall 1b. An automatic discharge device 2 for sheets that cannot be conveyed is disposed on one side wall 1a of the main body 1, and a heating raised portion 3 is disposed on the other side wall 1b.

The automatic discharge device 2 for sheets that cannot be conveyed is a sheet insertion slot 21.
and the first and 211th!2nd feed roller pair 22.23,
It consists of a sheet discharge port 2/l and an inclined guide member 25.

The sheet insertion opening 21 is formed in one side wall 1a of the main body 1 and communicates with the conveyance path 11.

This sheet insertion opening 21 is for manually inserting the thermally expandable sheet S.

The first and 2111st feed roller pairs 22 and 23 are provided along the conveyance path 11, and serve to nip and convey the thermally expandable sheet inserted from the sheet insertion opening 21.

The first Wi feed roller pair 22 is provided near the sheet insertion opening 21 , and the second feed roller pair 23 is provided near the heating raised portion 3 . Then, the first conveying roller pair 22 and the second conveying roller pair 22
The inter-axial distance λ1 between the conveying roller pair 23 is set to be longer than the inter-axial distance λ1 between the second conveying roller pair 23 and a third conveying roller pair 34, which will be described later. Note that the first and second conveying roller pairs 22, 23, together with the third conveying roller pair 34, are driven to rotate at a constant speed by a driving member (not shown).

The sheet discharge port 24 is provided in one side wall 1a of the main body 1 at a position below the sheet insertion port 21.
It communicates with

The inclined guide member 25 guides the leading end of the thermally expandable sheet S transported by the first transport roller pair 22 to the second Wi transport roller pair 23.
At the same time, the thermally expandable sheet S, which is shorter than the center-to-axis distance λl and whose leading end does not reach the second conveying roller pair 23, is guided to the sheet discharge port 24. The inclined guide member 25 is a guide plate 11a that is located below the conveyance path 11 formed between the sheet insertion opening and the second IlII conveyance roller pair 23, and guides the thermally expandable sheet S to the second conveyance roller pair 23. and its one end 25"a is connected, and the other end m
25b is arranged at the lower end position of the sheet discharge port 24. That is, the inclined guide member 25 is inclined with the other end 25b facing downward.

The heating raised portion 3 consists of a light source 31, a conveyance table 32, a conveyance exit 33, etc., and a third W1 feed roller pair 34.

The light source 31 is provided above the transport path 11 between the second transport roller pair 23 and the third W1 transport roller pair 34 and faces downward. This light source 31 is a long halogen lamp, and its longitudinal direction is arranged along the width direction of the conveyance path 11.

The conveyance table 32 is provided below the conveyance path 11 between the second conveyance roller pair 23 and the third conveyance roller pair 34, and guides and supports the thermally expandable sheet S conveyed through the conveyance path 11. It is something to do. This conveyance table 32 consists of a first conveyance table 32a placed on the upstream side and a second conveyance table 32b placed on the downstream side. It has four parts 321. The recessed portion 321 includes a first sloped portion 321a that slopes downward from the downstream side of the first conveyance table 32a, and a second sloped portion 321b that slopes downward from the upstream side of the second conveyance table 32b.
The tips of the second inclined portions 321a and 321b are spaced apart from each other.

The conveyance outlet 33 is formed on the other side wall 1b of the main body 1 and communicates with the conveyance passage 11.

The third conveyance roller 34 is connected to the conveyance outlet 33 on the conveyance path 11.
The thermally expandable sheet S is sandwiched and conveyed to the conveyance outlet 33.

The three-dimensional image forming apparatus of this embodiment is configured as described above, and its operation will be explained next.

First, the power is turned on to the three-dimensional image forming apparatus, the first to third conveyance rollers 22, 23, 34 are driven, and the light source 3 is driven.
Turn on 1. In this state, a thermally expandable sheet S on which a desired image has been formed using a highly light-absorbing material (for example, black toner of an electronic copying machine, ink, pencil, etc.) is inserted through the sheet insertion opening 21 and sent into the conveyance path 11. . Then, the thermally expandable sheet S is held between the rotating first pair of conveying rollers 22 and conveying force is applied thereto, so that the thermally expandable sheet S advances toward the second pair of Wi conveying rollers 23 . However, if the thermally expandable sheet S is short and the leading end does not reach the second III feed roller pair 23 when the rear end is sent out from the 111th feed roller pair 22, the rear end side may fall. The receiver is fixed on the inclined guide member 25. The thermally expandable sheet S is guided to the sheet discharge port 24 by the inclination of the inclined guide member 25 and is discharged from the sheet discharge port 24 to the outside of the main body 1 . On the other hand, if the thermally expandable sheet S is sufficiently long and its leading end reaches the second WI feed roller pair 23 when the rear end is sent out from the first feed roller pair 22,
The second tl transport roller pair 23 transports the same number to the third transport roller pair 34 . At this time, the thermally expandable sheet S is guided and supported by the conveyor table 32 and advances, and the light source 3
Irradiated by 1. As a result, the image portion absorbs more light than the non-image portion and is heated, so that only the image portion of the thermally expandable sheet S is raised and becomes three-dimensional. Note that four parts 321 are formed on the conveyor table 32 at positions corresponding to the light sources 31, and the thermally expandable sheet S is placed in the recesses 321.
Since the sheet S is in a non-contact state when passing through, the transfer of heat between the thermally expandable sheet S and the conveyance table 32 is extremely small, and the raised portions are raised uniformly. Then, when the leading end of the thermally expandable sheet S reaches the third pair of conveying rollers 34, the thermally expandable sheet S is pinched and conveyed by the third pair of conveying rollers 34 and is conveyed out from the conveying outlet 33.

As described above, since the automatic discharge device 2 for sheets that cannot be conveyed is incorporated in the three-dimensional image forming apparatus of this embodiment, the thermally expandable sheet S is short and its rear end is separated from the first pair of conveyance rollers 22. When it is sent out, its tip becomes the 2'I1
Those that do not reach the first feed roller pair 23 are sent to the sheet discharge port 24.
is discharged from. Thereby, short thermally expansible sheets S having a predetermined length or less can be automatically excluded, and it is possible to prevent the thermally expansible sheets S from stagnating on the heating raised portions 3 beforehand.

Further, the distance between the axes of the first conveyance roller pair 22 and the second conveyance roller pair 23 is made longer than the distance R2 between the axes of the second conveyance roller pair 23 and the third conveyance roller pair 34, so that each conveyance roller pair By arranging 22, 23, and 34, short sheets are eliminated. Therefore, a simple structure can be achieved without requiring detailed electrical parts or the like.

Furthermore, since the sheet discharge port 23 is provided on the same side as the sheet insertion port 21, it is convenient for the operator.

(Second Embodiment) FIG. 3 is a schematic cross-sectional view showing the main parts of a three-dimensional image forming system incorporating an automatic discharge device for sheets that cannot be transported according to this embodiment. The automatic sheet discharging device for untransportable sheets of this embodiment is configured to remove short sheets of a predetermined length or less from the first and second sensors 26.
．． 27, and is different from the first embodiment in that the inclined guide member is swingably provided. Note that the explanation of each component that overlaps with that of the first embodiment will be omitted here, and only the different points will be explained. Furthermore, the same numbers are used for the same components.

The first and second sensors 26 and 27 each include a light emitting element 26.
27a and light receiving elements 26b, 27b. The first sensor 26 is the first conveyor roller pair 2
A second sensor 27 is provided at a position immediately before the upstream side of the pair of second conveyance rollers 23, and a second sensor 27 is provided at a position immediately before the upstream side of the second conveyance roller pair 23, with the conveyance path 11 in between. and the first and second sensors 26
．． 27 is set so that the distance 3 between them is longer than the distance 2 between the axes of the second conveying roller pair 23 and the third conveying roller pair 34. First and second sensor 26.2
7 is electrically connected to a control section (not shown) which will be described later, and when the first sensor 26 detects the rear end after detecting the leading end of the thermally expandable sheet S, the second t-sensor 27
If it does not detect the tip, it sends a detection signal to the control unit.

The inclined guide member 28 is provided between the sheet discharge port 24 and the second conveying roller pair 23, and
It consists of a fixed inclined guide 281 arranged on the side and a swinging inclined guide 285 arranged on the second conveyance roller pair 23 side. The fixed inclined guide 281 is plate-shaped,
One end 281a of the sheet discharge port 24 is located at the lower end of the main body 1.
The other end 281b side is inclined obliquely upward toward the second conveying roller pair 23.

The swinging inclined guide 285 is plate-shaped and has a length slightly shorter than the distance between the axes of the first and second conveyance roller pairs 22 and 23, and its rear end 285a is connected to the second conveyance roller pair 22.
It is pivoted at a position near No. 3 so as to be swingable in the vertical direction.

This swinging inclined guide 285 is driven by an electromagnetic solenoid (not shown) that is controlled on and off by a control unit, and is held at a normal position along the conveyance path 11 when the electromagnetic solenoid is off. There is. When the electromagnetic solenoid is on, the tip m285b swings downward and is held in a position overlapping the other end 281b of the fixed inclined guide 281.

Further, on the lower surface 285C of the swinging inclined guide 285, a stopper 286 is provided extending substantially perpendicularly from the lower surface 285C to prevent the thermally expandable sheet from entering from the sheet discharge port 24.

The control unit is electrically connected to the first and second sensors 26, 27 and the electromagnetic solenoid, respectively, and is connected to the first and second sensors 26, 27 and the electromagnetic solenoid. When the detection signal is received from the sensors 26 and 27, the electromagnetic solenoid is turned on.

In the automatic discharge device for sheets that cannot be conveyed according to this embodiment, the thermally expandable sheet S is inserted through the sheet insertion opening 21 and
When the thermally expandable sheet S is fed into the thermally expandable sheet S, the leading end of the thermally expandable sheet S is detected by the first sensor 26 . After that, the first transport O-ra pair 22
The sheet is held and conveyed by the rollers and moves along the swinging inclined guide 285 toward the second pair of conveying rollers 23 . When the rear end of the thermally expandable sheet S is detected by the first sensor 26 and the second sensor 27 detects its leading end, the thermally expandable sheet S is sufficiently long, and the second conveyor roller The pair 23 pinches and conveys it to the heating raised portion 3 . However, when the second sensor 27 does not detect the tip, since the thermally expandable sheet S is short, it sends a detection signal to the control section, and upon receiving the detection signal, the control section turns on the electromagnetic solenoid. Then, the swinging inclination guide 285 swings around the rear end 285a, and its tip 285b inclines downward, so that the fixed inclination moves toward the idle 2.
It is in a state where it is centered on the other end 281b of 81.

As a result, the thermally expandable sheet S moves to both inclined guides 281.
The sheet is guided along the slope 285 and discharged to the sheet discharge port 24. After a predetermined period of time has elapsed, the electromagnetic solenoid becomes A and the swinging inclined guide 285 swings back to its normal position along the conveyance path 11.

As described above, in the automatic discharge device for sheets that cannot be conveyed according to the present embodiment, since the swinging inclined guide 285 is held along the conveyance path 11 in the normal position, the first and second conveyance rollers 22, 23 are The thermally expandable sheet S can be reliably conveyed between the two.

Further, since the swinging inclined guide 285 is provided with a stopper 286, it is possible to prevent the operator from accidentally inserting the thermally expandable sheet S from the sheet discharge port 24.

In addition to the above-mentioned embodiments, the detection signal sent to the control unit when a short thermally expandable sheet S is detected may be, for example, a detection signal sent to the control unit when the first sensor 26 detects the tip of the thermally expandable sheet S after the invasion time has elapsed. However, the second sensor 27 may send the signal when the tip thereof is not detected.

[Effects of the Invention] The automatic discharge device for sheets that cannot be conveyed according to the present invention has a sheet insertion slot for manual insertion, and two trays arranged at a predetermined interval to convey sheets inserted from the sheets 1 to 1 through the insertion slot. a conveyance roller, a sheet discharge port provided below the sheet insertion port from which the sheet is discharged, and a sheet discharging port provided between the two conveyance rollers to guide sheets of a predetermined length or less to the sheet discharge port. and an inclined guide member. Accordingly, when a short sheet having a predetermined length or less is inserted from the sheet insertion port, the short sheet is guided by the inclined guide member and discharged from the sheet discharge port. For this reason,
Automatic discharge of sheets that cannot be transported according to the present invention 1i! When a short sheet of length less than a predetermined length is fed in, the & position can automatically determine and eject it.

[Brief explanation of the drawing]

1 to 3 relate to embodiments of the present invention, and FIG.
A schematic cross-sectional view of the essential parts of a three-dimensional image forming apparatus incorporating a self-help ejection system for sheets that cannot be transported in the embodiment, FIG. 2 is a partial perspective view of the sheet insertion port side, and FIG. 3 is a transport diagram in the second embodiment. Automatic ejection of unacceptable sheets! FIG. 2 is a schematic cross-sectional view of a main part of an image forming apparatus incorporating an A-position. FIG. 4 is a schematic cross-sectional view of the main parts of a conventional three-dimensional image forming apparatus. 21...Sheet insertion opening 22...First Wi feed roller pair 23...Second conveyance roller pair 24...Sheet discharge port 25.28...Inclination guide member patent applicant Agent for Minolta Camera Co., Ltd.
Patent attorney Hiroshi Okawa

Claims (1)

[Claims] (1) A manual sheet insertion slot; two transport rollers installed at a predetermined interval to transport the sheet inserted through the sheet insertion slot; The sheet discharge port is configured to include a sheet discharge port, and an inclined guide member that is provided between the two transport rollers and guides sheets of a predetermined length or less to the sheet discharge port. Automatic sheet ejection device.