Envelope sealing device and image forming system

Abstract

To provide an enclosing-sealing device that can be miniaturized and accurately detects an open state and a flap length.SOLUTION: An enclosing-sealing device has: flap opening means disposed in an envelope conveying path for conveying an envelope to a sealing position and that opens a flap of the envelope while the envelope is conveyed to the sealing position; first envelope detecting means disposed upstream the flap opening means in a conveying direction in the envelope conveying path and that detects an end in the conveying direction of the envelope being conveyed; second envelope detecting means disposed downstream the flap opening means in the conveying direction in the envelope conveying path and that detects the end of the envelope being conveyed; and control means that controls an operation of enclosing an enclosure into the envelope, wherein the control means determines an opening / closing state of the flap based on end detection results of the first envelope detecting means and the second envelope detecting means and performs anomaly removal process for the operation of enclosing when determining that the opening / closing state is anomalous.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an inserting and sealing device and an image forming system. [Background technology]

[0002] As a device for automatically inserting an enclosure into an envelope, an inserting and sealing device is known which inserts and seals a "folded sheet" obtained by folding a sheet-like medium in a predetermined manner as an enclosure. Also known is an image forming system which inserts and seals the folded sheet after the image is formed by linking an image forming device which forms an image on a sheet and a folding device which folds the sheet on which the image is formed.

[0003] To insert an item into an envelope, it is necessary to determine whether the envelope's flap is open (hereinafter referred to as the "open state"). Therefore, a configuration has been disclosed that determines the open state by using a sensor installed to set a detection line at a height that can detect the top of the tip of the flap that is open at an angle that is not perpendicular to the envelope transport direction and perpendicular to the transport surface (see Patent Document 1). Summary of the Invention [Problem to be solved by the invention]

[0004] The configuration disclosed in Patent Document 1 is not suitable for miniaturization of the device because it requires a dedicated sensor to determine the open state of the envelope. In addition, when performing an inserting operation using various types of envelopes, the flap length of the envelope may differ depending on the type, so it is necessary to control the inserting operation according to the flap length. Therefore, it is necessary to measure the flap length. In this respect, the configuration of Patent Document 1 can determine the open state, but cannot accurately measure the flap length. In other words, the conventional technology allows for miniaturization, but there is a problem in realizing accurate detection of the open state and accurate detection of the flap length.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an inserting and sealing device that can be made compact and that can accurately detect the opening state and flap length. [Means for solving the problem]

[0006] In order to solve the above technical problems, one aspect of the present invention is an inserting and sealing device that transports an envelope to a sealing position and inserts and seals an enclosure, the device comprising: a flap opening means that is disposed on an envelope transport path that transports the envelope to the sealing position and that opens a flap of the envelope while the envelope is being transported to the sealing position; a first envelope detection means that is disposed on the envelope transport path upstream of the flap opening means in the transport direction and that detects an end of the envelope in the transport direction while being transported; a second envelope detection means that is disposed on the envelope transport path downstream of the flap opening means in the transport direction and that detects the end of the envelope while being transported; and a control means that controls an operation of inserting the enclosure into the envelope, the first envelope detection means and the second envelope detection means detect upstream and downstream ends of the envelope, respectively; The control means detects the first envelope. Inspection Based on the results Based on a first envelope length calculated as a length in the transport direction of the envelope and a second envelope length calculated based on a detection result of the second envelope detection means, The open / closed state of the flap is judged, and when the open / closed state is judged to be abnormal, abnormal processing is executed for the sealing operation. Effect of the Invention

[0007] According to the present invention, miniaturization is possible and the opening state and flap length can be detected with high accuracy. [Brief description of the drawings]

[0008] [Figure 1] 1 is a front external view showing an embodiment of an image forming system according to the present invention. [Diagram 2] FIG. 4 is a block diagram showing an example of a control configuration according to the embodiment. [Diagram 3] FIG. 2 is a diagram showing the internal configuration of an embodiment of an inserting and sealing device according to the present invention. [Figure 4] 1 is a schematic diagram of a flap opening mechanism provided in an embodiment of an inserting and sealing device. [Diagram 5]1 is a schematic diagram of an envelope opening and holding section provided in an embodiment of an inserting and sealing device; [Figure 6] FIG. 4 is a schematic diagram showing an example of the operation of the inclusion pusher. [Figure 7] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 8] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 9] 11A to 11C are diagrams illustrating the operation of a flap opening mechanism during the enclosing operation of the above-mentioned enclosing and sealing device. [Figure 10] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 11] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 12] 11A to 11C are diagrams illustrating the operation of the envelope opening and holding unit during the enclosing operation of the enclosing and sealing device. [Figure 13] 11A to 11C are diagrams illustrating the operation of the envelope opening and holding unit during the enclosing operation of the enclosing and sealing device. [Figure 14] 11A to 11C are diagrams illustrating the operation of the envelope opening and holding unit during the enclosing operation of the enclosing and sealing device. [Figure 15] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 16] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 17] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 18] 11A to 11C are diagrams illustrating the operation of the envelope opening and holding unit during the enclosing operation of the enclosing and sealing device. [Figure 19] 11A to 11C are diagrams illustrating the operation of the envelope opening and holding unit during the enclosing operation of the enclosing and sealing device. [Figure 20] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 21] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 22]4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment. [Diagram 23] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 24] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Diagram 25] FIG. 2 is a functional block diagram of a control unit provided in the above-mentioned inserting and sealing device. [Figure 26] 6 is a flowchart showing the flow of an envelope transport process executed in the control unit. [Figure 27] 10 is a flowchart showing a detailed flow of the envelope transport process. [Figure 28] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Figure 29] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Diagram 30] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Diagram 31] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Diagram 32] 10 is a flowchart showing another example of the detailed flow of the envelope transport process. [Diagram 33] 4A to 4C are diagrams illustrating a process of an enclosing operation of the enclosing and sealing device according to the embodiment; [Diagram 34] 13 is a diagram showing an example of the relationship between the result of the folding process and the sealing process in the folding processing device linked to the above-mentioned inserting and sealing device. FIG. [Diagram 35] FIG. 2 is a diagram showing an example of the relationship between the result of post-processing and sealing processing in a post-processing device linked to the above-mentioned inserting and sealing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Embodiment of Image Forming System] First, an embodiment of an image forming system according to the present invention will be described. Fig. 1 is a front view showing a schematic internal configuration of a print system 1 as an example of an image forming system. The print system 1 includes an image forming device 200, a folding device 300 as a sheet processing device, an inserting and sealing device 100 as an embodiment of an inserting and sealing device according to the present invention, and a post-processing device 400.

[0010] The image forming device 200 is an example of a device that forms an image on a sheet-like medium using a predetermined image forming method and discharges the medium. The medium on which the image has been formed (hereinafter, simply referred to as "sheet S") is discharged to the enclosing and sealing processing device 100 as a folded sheet Sf that has been subjected to a predetermined folding process in the folding processing device 300. The sheet S may be discharged to the enclosing and sealing processing device 100 as it is without folding in the folding processing device 300. An instruction to fold or not fold the sheet S is sent from the printer control unit 260 to a control unit (printer control unit 260 described later) included in the image forming device 200 based on information input by the user of the print system 1. Alternatively, an instruction is sent to a folding control unit 320 included in the folding processing device 300 based on information input by the user of the print system 1.

[0011] The inserting and sealing processing device 100 performs an inserting and sealing process in which a folded sheet Sf discharged as an enclosure from a device (image forming device 200 or folding processing device 300) located upstream in the direction in which the sheet S is brought in (the conveying direction) is inserted into an envelope E and sealed. Note that the "enclosure" that is brought in from the upstream side in the conveying direction is not limited to a "folded sheet Sf" but also includes a "sheet S." Note that the sheet S or folded sheet Sf may be discharged to a device located downstream without being subjected to the inserting and sealing process.

[0012] The post-processing device 400 is a device that performs post-processing, such as stapling, on the sheets S and folded sheets Sf discharged from the upstream devices, such as the folding device 300 and the enclosing and sealing device 100, as instructed via the control unit.

[0013] The inserting and sealing processing device 100 can insert the folded sheet Sf into the envelope E in a suitable orientation. Here, the "suitable orientation" refers to an orientation that corresponds to a transparent window ew that is formed in advance in the envelope E so that information such as the address formed on the folded sheet Sf as an enclosure can be seen from the outside of the envelope E after the enclosure. There are a plurality of types (fold types) of folding processing that can be performed on the folded sheet Sf, and the orientation of the information such as the address with respect to the conveying direction differs depending on the folding type. Therefore, the inserting and sealing processing device 100 determines whether or not the orientation of the folded sheet Sf needs to be reversed in a direction perpendicular to the conveying direction when conveying the folded sheet Sf according to the folding type. If reversal is required, a conveying mechanism is provided that reverses the folded sheet Sf using a conveying path upstream of the insertion position and then conveys it to the insertion position. Details of the reversal control and conveying control for the folded sheet Sf will be described later. The inserting and sealing processing device 100 can also insert a sheet S as an enclosure that has not been folded in the same manner.

[0014] [Coordinate axes referred to in this embodiment] Here, the "coordinate axes" to be referred to in the description of the embodiments of the present invention will be described. As shown in Fig. 1, the axis parallel to the placement surface of the print system 1 and along the arrangement direction of the devices constituting the print system 1 is defined as the Y axis. The direction of the arrow indicating the Y axis is defined as the "+Y direction", and the opposite direction is defined as the "-Y direction". The sheet S on which an image has been formed in the image forming apparatus 200 is conveyed in the +Y direction, and then transported to each device arranged downstream in the +Y direction.

[0015] Similarly, the X-axis is an axis parallel to the mounting surface of the print system 1 and along the depth direction of the print system 1. The direction of the arrow indicating the X-axis is the "+X direction," and the opposite direction is the "-X direction."

[0016] The Z axis is an axis that is perpendicular to the X and Y axes and runs along the height direction of the print system 1. The direction of the arrow indicating the Z axis is the "+Z direction," and the opposite direction is the "-Z direction."

[0017] In the drawings used in the following description, when the same coordinate axes as above are used, the directions used in the description shall be defined in the same manner as above.

[0018] The sheet S on which an image is formed in the image forming device 200 is discharged in the +Y direction, and then conveyed to each device arranged downstream. Therefore, the +Y direction is almost synonymous with the conveying direction. However, in the inserting and sealing processing device 100, the sheet S is introduced in the +Y direction, but the conveying direction in the inserting and sealing operation of the sheet S and the folded sheet Sf is the Z direction.

[0019] That is, in the inserting and sealing processing device 100 that constitutes the printing system 1, the transport direction of the envelope E is the "Z direction", the transport direction of the envelope E to the inserting position is the +Z direction, and the transport direction from the inserting position to the sealing position is the -Z direction.

[0020] [Print System 1 Function Blocks] The overall functional blocks of the print system 1 will be described with reference to Fig. 2. In the following description, it is assumed that the medium to be transported and inserted into the envelope E is a folded sheet Sf on which an image has been formed in the image forming device 200 and on which a predetermined folding process has been performed in the folding device 300. In Fig. 2, the movement path (conveyance path) of the folded sheet Sf is shown by a dashed line, and the communication paths used to send and receive signals between the functional blocks are shown by solid lines. The movement path (conveyance path) of the sheet S is also shown by a dashed line.

[0021] The image forming apparatus 200 is an apparatus that forms an image on a sheet S by, for example, a known electrophotographic process. The image forming apparatus 200 includes a display unit 210, an operation unit 220, a sheet feeding unit 230, an image creating unit 240, a fixing unit 250, and a printer control unit 260.

[0022] The display unit 210 displays information to inform the user of the status of various functions and operation details. The operation unit 220 corresponds to an operation interface for the user to set the processing operation mode and the number of processing units, and to perform setting operations such as settings that require inversion when inserting in the inserting and sealing processing device 100. The sheet feeding unit 230 has a sheet feeding mechanism that stocks the sheets S and separates and feeds them one by one. The image creating unit 240 forms a latent image on a photosensitive member and transfers the image to the sheet S. The fixing unit 250 fixes the image transferred to the sheet S. The printer control unit 260 controls the operation of each of the above-mentioned functional blocks.

[0023] [Examples of different folding operations in the sheet folding unit 310] Here, as an example of different types of configurations, an embodiment of the sheet folding unit 310 is shown in Figs. 34 and 35. There are multiple types of configurations of the sheet folding unit 310, and depending on the configuration, the orientation of the image forming surface Ps of the folded sheet Sf when discharged may differ even if the folding type is the same. The sheet folding unit 310 shown in Fig. 34 is referred to as "Type A" in this specification, and the sheet folding unit 310 shown in Fig. 35 is similarly referred to as "Type B". In Figs. 34 and 35, the print surface (image forming surface Ps) on which an image is formed on the sheet S is marked with a △ symbol. That is, in the following explanation, it is assumed that no image is formed on one side of the sheet S.

[0024] As illustrated in FIG. 34, the lower surface side of the sheet S conveyed from the image forming apparatus 200 to the sheet folding section 310 in the conveying direction corresponds to the image forming surface Ps.

[0025] First, as shown in FIG. 34(a), the sheet S is conveyed from the image forming apparatus 200 toward the pair of conveying rollers 311.

[0026] The sheet S conveyed downstream by the conveying roller pair 311 is conveyed to a predetermined position by a first folding roller 312, a first folding conveying roller 313, and a second folding roller 314, as shown in FIG. 34(b).

[0027] Thereafter, as shown in FIG. 34(c), first fold conveying roller 313 and second fold roller 314 rotate in the opposite direction, and a first fold is formed in sheet S.

[0028] As shown in FIG. 34(d), after the first crease has been formed, the sheet S is transported by the first folding roller 312, the second folding roller 314, and the second folding transport roller 316 to a path other than the feed path, and stops at a predetermined position.

[0029] 34(e), second folding conveying roller 316 rotates in the reverse direction, and third folding roller 315 also rotates and conveys the sheet downstream, forming a second fold and completing the outer triple fold. In this case, image forming surface Ps of folded sheet Sf is located on the surface (lower surface) that faces downward in the direction perpendicular to the conveying direction.

[0030] The case of the type B sheet folding unit 310 will be described. In the type B sheet folding unit 310, as shown in Fig. 35, the sheet carried in from the image forming apparatus 200 is folded while being conveyed in the -Z direction. The image forming surface Ps of the sheet S when carried in faces, for example, in the +Y direction.

[0031] First, as shown in FIG. 35(a), a sheet is conveyed from the image forming apparatus 200 toward the first conveying roller pair 321.

[0032] Subsequently, as shown in FIG. 35(b), the sheet is conveyed downward to a predetermined position by first conveying roller pair 321, first folding roller 323, and first folding conveying roller 322, and then stops.

[0033] Thereafter, as shown in FIG. 35(c), first fold conveying roller 322 and first folding roller 323 rotate in the opposite direction, and second folding roller 324 rotates, thereby forming a first fold.

[0034] Furthermore, as shown in FIG. 35(d), the second conveying roller pair 326 also rotates to convey the sheet, and the sheet stops at a predetermined position.

[0035] Thereafter, as shown in FIG. 35(e), the second conveying roller pair 326 rotates in the reverse direction, and the folded sheet Sf is conveyed upward by the rotation of the second folding conveying roller 325, and the second fold is formed by the second folding roller 324 and the second folding conveying roller 325, completing the outer three-fold. In this case, unlike the A type, the image forming surface Ps of the folded sheet Sf is located on the surface (upper surface side) that is upward in the direction perpendicular to the conveying direction. In this way, even when the same outer three-fold is performed by different types of sheet folding units 310, such as the A type and the B type, the position (direction) of the printed surface relative to the conveying direction is different. In other words, the surface on which the address and other information are printed may be on the lower side or the upper side when the sheet is conveyed to the inserting and sealing processing device 100, depending on the type of the sheet folding unit 310. Therefore, as described below, in the inserting and sealing processing device 100 of this embodiment, based on information indicating the type of the sheet folding section 310, the folded sheet Sf is inverted during transport to unify the position (orientation) of the image forming surface Ps to a certain direction and then the inserting operation is performed.

[0036] [Description of the Encapsulating and Sealing Processing Apparatus 100] Returning to Fig. 2, the inserting and sealing processing apparatus 100 includes a sheet reversing processing section 110, an inserting processing section 120, a sealing processing section 130, a notification section 190, and an inserting and sealing control section 150.

[0037] The sheet inversion processing unit 110 executes a sheet transport process for transporting the folded sheet Sf to an insertion position according to the orientation of the image forming surface Ps of the folded sheet Sf conveyed from the sheet folding unit 310. Here, the "sheet transport process" refers to a transport process according to a control mode (including the type of folding, the position of the printed surface, etc.) transmitted from the folding control unit 320 to the insertion and sealing control unit 150 via the communication line 105. In other words, the sheet inversion processing unit 110 performs a transport process for transporting the folded sheet Sf downstream in the transport direction, and a reversing process for switching the end of the folded sheet Sf in the transport direction. Through the transport process and the reversing process, the folded sheet Sf is transported to the insertion processing unit 120 or the post-processing unit 400.

[0038] The inserting unit 120 includes a mechanism for moving the envelope E to a position where the folded sheet Sf conveyed from the sheet inversion unit 110 can be inserted, making the envelope E wait at a predetermined position, and inserting an enclosure into the waiting envelope E. The inserting unit 120 also includes a mechanism for opening a flap ef so that the opening of the envelope E is open before the envelope E reaches the predetermined position. The inserting unit 120 also includes a mechanism for calculating the length of the envelope E (the dimension in the direction in which the enclosure is inserted) and the length of the flap ef before the envelope E reaches the predetermined position. These mechanisms allow the inserting process of the folded sheet Sf to be performed on the envelope E that is held at the predetermined position and has its opening open. This inserting process can be performed appropriately for various types and sizes of envelopes E.

[0039] The sealing processing section 130 closes the flap ef of the envelope E in which the folded sheet Sf is enclosed, and then discharges the sealed envelope E onto an envelope discharge tray 134.

[0040] The notification unit 190, which serves as a notification means, has the function of notifying users of the printing system 1 and the inserting and sealing processing device 100 of the occurrence of an abnormality when an abnormality occurs in the enclosure transport process, inserting process, or sealing process controlled by the inserting and sealing control unit 150.

[0041] The inserting and sealing control unit 150 controls the operation of a plurality of pairs of conveying rollers constituting the sheet reversing processing unit 110, the inserting processing unit 120, and the sealing processing unit 130, and the operation of a switching claw that switches the conveying path of the envelope E. In addition, when the inserting and sealing control unit 150 detects an abnormality in the control of the above configuration, it notifies the abnormal state via the notification unit 190.

[0042] The inserting and sealing control unit 150 is a control means that performs conveying control including reversing control and inserting control of the folded sheet Sf. The inserting and sealing control unit 150 as the control unit receives "insertion target information" as information related to the folded sheet Sf from the printer control unit 260 and the folding control unit 320. Then, the inserting and sealing control unit 150 performs conveying control based on the contents indicated by each piece of information included in the received insertion target information.

[0043] The "enclosure target information" is information related to the sheet S and the folded sheet Sf that are the enclosures. More specifically, it includes information for controlling the leading edge of the sheet S and the folded sheet Sf when they are enclosed in the envelope E so that they are the desired edge. It also includes, for example, "folding type information" that specifies the type of folding process for the folded sheet Sf. It also includes "reversal necessity information" that specifies the necessity of a reversal conveying process described later as operation instruction information from the image forming device 200, which is one of the upstream devices. It also includes, for example, print surface information that indicates the image forming surface on which an image is formed on the folded sheet Sf. It also includes, for example, "processing device information" that indicates the type (A type or B type) of the sheet folding unit 310 that performed the folding process.

[0044] The post-processing device 400 has a post-processing section 410 and a post-processing control section 420. The post-processing section 410 performs a predetermined post-processing on the sheet S conveyed from the upstream side under the control of the post-processing control section 420. The post-processing control section 420 controls the post-processing operation in the post-processing control section 420 according to the operation mode transmitted from the printer control section 260, the folding control section 320, and the enclosing / sealing control section 150 via the communication line 403.

[0045] The printer control unit 260, folding control unit 320, enclosing / sealing control unit 150, and post-processing control unit 420 are interconnected, and configured to exchange information necessary for control via each communication line (207, 105, 403). Therefore, by cooperation between each control unit (260, 320, 150, 420), information regarding the processing mode that the user requests to perform on the sheet S and the folded sheet Sf, and the sheet size are shared with each other. As a result, control information that enables each mechanism to perform a predetermined process at a predetermined timing and in a predetermined process is shared throughout the printing system 1.

[0046] The enclosing and sealing control unit 150, which performs the central control operation in this embodiment, is equipped with a CPU (Central Processing Unit) as an arithmetic processing unit, and a ROM (Read Only Memory) and RAM (Random Access Memory) as storage units. It also has an interface that outputs control signals to each transport roller and receives signals from each transport roller as input, and an interface that receives output signals from each sensor. The operation of the enclosing and sealing processing device 100 is controlled by a control program that can execute control processing using these hardware resources. The functional blocks of the enclosing and sealing control unit 150 will be described in detail later.

[0047] In addition, like the insertion / sealing control unit 150, the printer control unit 260, the folding control unit 320 and the post-processing control unit 420 also use hardware resources consisting of a CPU, ROM, RAM, etc. to control the operation of the hardware mechanisms by control programs that realize their respective functions.

[0048] 1 and 2 show an example of the configuration of the printing system 1 in which a post-processing device 400 is connected downstream of the inserting and sealing processing device 100. Representative post-processing devices 400 include a finisher that performs stapling, a stacker, a bookbinding machine, etc. Also, the system configuration of the printing system 1 may be such that the inserting and sealing processing device 100 is the most downstream device.

[0049] Here, we will first explain an embodiment of the control operation of the print system 1. This embodiment is a control process based on the envelope length of the envelope E and the flap length of the flap ef calculated by the insertion processing unit 120 described later.

[0050] The inserting and sealing control unit 150 executes a process of calculating the length of the envelope E (envelope length) and the length of the flap ef (flap length) of the envelope E by the control process program before transporting the envelope E to the waiting position. The inserting and sealing control unit 150 also executes a process of notifying the calculated envelope length and flap length to the folding control unit 320, the post-processing control unit 420, and also to the printer control unit 260 via the folding control unit 320.

[0051] In this embodiment, the envelope length refers to the distance between both ends in the transport direction when the envelope E is supplied to the envelope insertion transport path 1105 described later. In other words, it refers to the distance between the leading end and trailing end in the movement direction of the envelope E from the state in which it is placed on the envelope set tray 127 described later toward the envelope insertion transport path 1105 via the envelope carry-in path 1107. In this embodiment, the envelope length includes the envelope length when it is transported with the flap ef closed (temporarily referred to as the first envelope length) and the envelope length when it is transported with the flap ef open (temporarily referred to as the second envelope length) in the transport direction defined as the above-mentioned movement direction.

[0052] Therefore, the first envelope length is the so-called top-bottom dimension of the envelope E, and corresponds to the distance from the bottom of the envelope E to the position where the flap ef is folded. The second envelope length corresponds to the distance from the bottom of the envelope E to the end of the flap ef. In the following description, unless otherwise noted, "envelope length" refers to the first envelope length. The value obtained by subtracting the first envelope length from the second envelope length corresponds to the length of the flap ef in the conveying direction. This length is referred to as the "flap length."

[0053] [Operation of the Encapsulating and Sealing Processing Apparatus 100] Next, using Figure 3, we will explain the conveying rollers that constitute the sheet inversion processing unit 110, the enclosing processing unit 120, and the sealing processing unit 130 of the enclosing and sealing processing device 100, the switching claw that switches the conveying direction of the conveyed object, and the conveying path on which these are arranged.

[0054] [Configuration of the sheet reversing processing unit 110] As shown in FIG. 3, the sheet inversion processing unit 110 has a plurality of conveying paths, which are distinguished as an input path 1100, a first conveying path 1101, a second conveying path 1102, a switchback conveying path 1103, an enclosing conveying path 1104 as a fourth conveying path, and a sheet discharge path 1109.

[0055] An entrance roller 101 is disposed on the carry-in path 1100. The carry-in path 1100 is a sheet transport path that receives folded sheets Sf discharged from an upstream device (e.g., the folding device 300). The inserting and sealing control unit 150 receives insertion target information, which is information related to the folded sheets Sf, from an upstream control unit (the printer control unit 260, the folding control unit 320), and controls the start and stop of rotation of the entrance roller 101.

[0056] A first conveying path 1101, which is one of a plurality of conveying paths provided downstream of the entrance rollers 101 and branches off from the carry-in path 1100, is provided with first conveying rollers 111 and first intermediate conveying rollers 114 as a first conveying means. Also, a first sheet detection sensor 118 is provided in the first conveying path 1101 as a first medium sensor that detects an end (rear end) of the conveyed folded sheet Sf. The first sheet detection sensor 118 is provided between the first intermediate conveying rollers 114 and the first conveying rollers 111.

[0057] A second conveying path 1102, which is one of the conveying paths provided downstream of the entrance rollers 101 and branches off from the carry-in path 1100 in a direction different from that of the first conveying path 1101, is provided with second conveying rollers 112 and second intermediate conveying rollers 115 as second conveying means. A second sheet detection sensor 119 is provided in the second conveying path 1102 as a second medium sensor that detects an end (rear end) of the conveyed folded sheet Sf. The second sheet detection sensor 119 is provided between the second intermediate conveying rollers 115 and the second conveying rollers 112.

[0058] The sheet reversing processing unit 110 also has a switchback conveying path 1103. The switchback conveying path 1103 is a conveying path that connects a junction position where the switchback conveying path 1103 joins the first conveying path 1101 downstream of the first conveying rollers 111 and a branching position where the switchback conveying path 1103 branches off from the second conveying path 1102 upstream of the second intermediate conveying rollers 115. The switchback conveying path 1103 switches the conveying direction of the folded sheet Sf that has been conveyed downstream on the second conveying path 1102, and the folded sheet Sf is conveyed to the first conveying path 1101 by switchback conveyance. The switchback conveying path 1103 as a third conveying path is provided with switchback conveying rollers 113 as a third conveying means.

[0059] Further, a sheet discharge path 1109 is provided as a downstream conveyance path following the first conveyance path 1101, for conveying the sheet S or the folded sheet Sf that has passed through the sheet inversion processing unit 110 to the downstream post-processing device 400. An exit roller 102 is disposed in the sheet discharge path 1109.

[0060] When the folded sheet Sf transported from the folding processing device 300 is not subjected to the enclosing process described below, the folded sheet Sf passes from the input path 1100 through the first conveying path 1101 and is discharged to a downstream device via the sheet output path 1109.

[0061] The sheet reversing processing unit 110 also has an inserting conveying path 1104 as a fourth conveying path which is a conveying path branching off from the first conveying path 1101 downstream of the first conveying rollers 111 and continuing to an inserting roller 121 which holds an envelope E into which the folded sheet Sf is to be inserted. The inserting conveying path 1104 is configured to continue to an envelope inserting conveying path 1105 as described later.

[0062] In addition, the sheet reversing processing unit 110 is provided with a branching claw 10 as a branching means at a branching position for transporting the folded sheet Sf from the carry-in path 1100 to either the first transport path 1101 or the second transport path 1102. The branching claw 10 switches between transporting the folded sheet Sf to the first transport path 1101 side or the second transport path 1102 side based on the insertion target information related to the folded sheet Sf carried into the carry-in path 1100.

[0063] In the sheet reversing processing unit 110, a first switching claw 11 is disposed as a first switching means at a junction where the switchback conveying path 1103 joins the first conveying path 1101. The first switching claw 11 switches between a state in which the folded sheet Sf conveyed from the carry-in path 1100 to the first conveying path 1101 side is conveyed to the first conveying roller 111 side, and a state in which the folded sheet Sf is conveyed from the switchback conveying path 1103 to the first conveying path 1101 side.

[0064] In the sheet reversing processing unit 110, a second switching claw 12 as a second deflection means is disposed at a branching position where the second conveying path 1102 branches into the switchback conveying path 1103. The second switching claw 12 switches between a state in which the folded sheet Sf conveyed from the carry-in path 1100 to the second conveying path 1102 side is conveyed to the second conveying rollers 112, and a state in which the folded sheet Sf is switchback-conveyed from the second conveying path 1102 to the switchback conveying path 1103.

[0065] In the sheet reversing processing unit 110, a third switching claw 13 as a third deflection means is disposed at a branching position where the first conveying path 1101 branches into an enclosing conveying path 1104. The third switching claw 13 switches between a state in which the folded sheet Sf conveyed by the first conveying path 1101 is conveyed to the enclosing conveying path 1104 and a state in which the folded sheet Sf is conveyed to a sheet conveying path 1109.

[0066] The folded sheet Sf conveyed to the first conveying path 1101 is conveyed to the first conveying rollers 111 by the first intermediate conveying rollers 114. The first conveying rollers 111 convey the conveyed folded sheet Sf downstream. When the third switching claw 13 is in the state shown in FIG. 3, the folded sheet Sf is conveyed to the insertion conveying path 1104. When the folded sheet Sf is conveyed a predetermined distance after the trailing end of the folded sheet Sf conveyed from the first intermediate conveying rollers 114 to the first conveying rollers 111 is detected by the first sheet detection sensor 118, the folded sheet Sf has already moved to the insertion conveying path 1104, so the operation of each conveying roller rotating in the sheet reversing processing unit 110 is stopped.

[0067] The folded sheet Sf conveyed to the second conveying path 1102 is conveyed to the second conveying rollers 112 by the second intermediate conveying rollers 115. When the folded sheet Sf is conveyed a predetermined distance after the trailing end of the conveyed folded sheet Sf is detected by the second sheet detection sensor 119, the second conveying rollers 112 stop once and then reverse. This puts the folded sheet Sf in a state where it can be switched back to the switchback conveying path 1103. At this time, before or at the same time as the second conveying rollers 112 reverse, the second switching claw 12 is rotated at the timing when the trailing end of the folded sheet Sf passes the second switching claw 12 (this is also determined based on the detection of the second sheet detection sensor 119). This switches the state to where the folded sheet Sf is conveyed to the switchback conveying path 1103.

[0068] When the folded sheet Sf is guided from the second conveying path 1102 to the switchback conveying path 1103 , the folded sheet Sf is conveyed toward the first conveying path 1101 by the switchback conveying rollers 113 .

[0069] [Configuration of the Encapsulation Processing Unit 120] 3, the insertion processing section 120 is provided with an envelope insertion conveying path 1105 that is connected to an insertion conveying path 1104 as a fourth conveying path for receiving the sheet S or folded sheet Sf as the insertion object from the sheet inversion processing section 110 and inserting it into an envelope E. The envelope insertion conveying path 1105 is provided with an envelope opening holding section 160 that opens the opening of the envelope E at the insertion position and holds the envelope in an open state so that the insertion object can be easily inserted.

[0070] The envelope inserting conveying path 1105 is connected to a sealing conveying path 1106 for performing a sealing process on the envelope E containing the enclosure. The envelope inserting conveying path 1105 is connected to the inserting conveying path 1104 and the sealing conveying path 1106 to form an envelope conveying path.

[0071] A first vertical conveying roller 122 and a second vertical conveying roller 123 are arranged in the envelope inserting conveying path 1105 to convey the envelope E to a position for receiving the folded sheet Sf. In the envelope inserting conveying path 1105, the envelope E conveyed to the position for receiving the folded sheet Sf is held by the inserting roller 121.

[0072] Further, between the inserting roller 121 and the first vertical conveying roller 122, and to the side of the envelope inserting conveying path 1105, an envelope opening and holding unit 160 is disposed. The envelope opening and holding unit 160 will be described in detail later.

[0073] A flap opening roller 124 is disposed at a connecting position between the envelope inserting conveying path 1105 and the sealing conveying path 1106. The flap opening roller 124 is provided with a flap opening mechanism 180 that opens a flap ef when the envelope E is conveyed from the envelope set tray 127 and conveyed through the envelope conveying path 1107 to a position before joining the envelope inserting conveying path 1105.

[0074] A separation sensor 128 for detecting the length of the first envelope when the flap ef is closed is disposed upstream of the flap opening roller 124 in the conveying direction. A flap open detection sensor 129 for detecting whether the flap ef is open (i.e., whether the flap ef is opened) and for detecting the length of the second envelope is disposed upstream and downstream of the flap opening roller 124 in the conveying direction.

[0075] An envelope switchback switching claw 21 is disposed at the junction where the envelope insertion conveying path 1105 and the envelope carry-in path 1107 join.

[0076] Envelope entrance path 1107, which merges with envelope insertion transport path 1105, is provided with separation roller 125, envelope transport roller 126, and separation sensor 128 as a first envelope detection means. An envelope set tray 127 is also provided at the end of envelope entrance path 1107. Together with envelope insertion transport path 1105, envelope entrance path 1107 also constitutes an envelope transport path.

[0077] A plurality of envelopes E are placed on the envelope set tray 127. The bottom of the envelope E placed on the envelope set tray 127, which is the end opposite the flap ef, faces the separation roller 125. Therefore, the leading edge of the envelope E in the transport direction when it is conveyed out of the envelope set tray 127 becomes the bottom of the envelope E. Therefore, the end on the side where the flap ef is provided becomes the trailing edge.

[0078] One envelope E picked up by separation roller 125 from a plurality of envelopes E placed on envelope set tray 127 passes through envelope entrance path 1107 by separation roller 125 and envelope transport roller 126, and is transported to a position beyond envelope switchback switching claw 21. Then, when the trailing end of the envelope E in the transport direction reaches a position beyond envelope switchback switching claw 21, including the transport by flap opening roller 124, envelope switchback switching claw 21 rotates to switch over to a state where the envelope E can be transported in a switchback manner.

[0079] That is, the envelope switchback switching claw 21 rotates between a position for temporarily transporting the envelope E taken out from the envelope set tray 127 to the sealing transport path 1106 and a position for transporting the envelope E to the sheet reversing processing unit 110 side in the envelope insertion transport path 1105. The envelope switchback switching claw 21 switches the transport direction of the envelope E in the envelope insertion transport path 1105.

[0080] The first vertical conveying rollers 122 and the second vertical conveying rollers 123 convey and hold the envelope E at an inserting position, which is a predetermined position of the envelope inserting conveying path 1105. The inserting position here corresponds to a position where the position of the opening of the envelope E (the position of the flap ef) is lower than the inserting rollers 121 and higher than the first vertical conveying rollers 122, as described below.

[0081] The inserting roller 121 is a type of conveying roller that rotates in a direction to insert the folded sheet Sf conveyed from the sheet reversing processing unit 110 into the envelope E.

[0082] [Configuration of sealing processing unit 130] 3, in the sealing processing section 130, a third vertical conveying roller 131 and a fourth vertical conveying roller 132 are arranged on the sealing conveying path 1106. In addition, between the third vertical conveying roller 131 and the fourth vertical conveying roller 132, a sealing section 135 is arranged to close a flap ef of the envelope E with an enclosure enclosed therein.

[0083] The third vertical conveying rollers 131 and the fourth vertical conveying rollers 132 convey the envelope E to a predetermined position on the sealing conveying path 1106 and hold it there.

[0084] In addition, an envelope discharge switching claw 31 is disposed at the branching position of an envelope discharge path 1108 that branches off from the sealing transport path 1106. An envelope discharge roller 133 is disposed at the end of the envelope discharge path 1108. The envelope discharge roller 133 is a roller that discharges an envelope E toward an envelope discharge tray 134. The envelope discharge tray 134 is a tray on which the discharged envelope E is placed.

[0085] The envelope discharge switching claw 31 is a member that rotates between a position in the insertion conveying path 1104 where the envelope E is transported from the flap opening roller 124 side to the third vertical conveying roller 131, and a position where the envelope E is transported from the insertion conveying path 1104 to the envelope discharge path 1108, thereby switching the transport direction of the envelope E.

[0086] As described above, in the inserting and sealing processing device 100, the conveying paths for conveying the folded sheet Sf from the sheet reversing processing section 110 to the inserting processing section 120 and the sealing processing section 130 are arranged so as to be connected in the vertical direction (Z direction). This conveying path, which is the conveying path for the folded sheet Sf and also the conveying path for the envelope E, corresponds to a vertical conveying path that connects the envelope inserting conveying path 1105 of the inserting processing section 120 and the sealing conveying path 1106 of the sealing processing section 130 in the vertical direction (Z direction).

[0087] [Configuration of flap opening mechanism 180] Here, details of the flap opening mechanism 180 as a flap opening means provided in the flap opening roller 124 will be described with reference to Fig. 4. The flap opening mechanism 180 includes a flap scooping claw 181 rotatably attached to the rotation shaft of one of the pair of conveying rollers that constitute the flap opening roller 124, and a spring 182 that biases the flap scooping claw 181.

[0088] The flap scoop 181 is disposed at a position where it comes into contact with the envelope E when the envelope E placed on the envelope set tray 127 is separated and conveyed through the envelope carry-in path 1107 by the envelope conveying roller 126. The flap scoop 181 is biased by a spring 182 so that the flap scoop 181 is in a position where it blocks the conveying path from the envelope carry-in path 1107 to the envelope insertion conveying path 1105 until the envelope E comes into contact with the flap scoop 181. In normal operation where the envelope E does not pass through, the flap scoop 181 is in contact with a conveying guide constituting the envelope insertion conveying path 1105, and the rotation of the flap scoop 181 is restricted by the spring 182. When the flap scoop 181 comes into contact with the envelope E and is pushed, it rotates against the bias of the spring 182 to a state where the envelope E can proceed to the envelope insertion conveying path 1105.

[0089] The flap scooping claw 181 has a top that catches the flap ef by being pushed by the envelope E and rotating when the transported envelope E passes by. When the flap ef is caught at the top, the flap scooping claw 181 is moved in the -Z direction by the flap opening roller 124, so that the flap ef changes from a closed state to an open state.

[0090] 4, in the envelope feed path 1107, a separation sensor 128 serving as a first envelope detection means is disposed upstream of the flap opening roller 124 in the conveying direction. And, a flap opening detection sensor 129 serving as a second envelope detection means is disposed downstream of the flap opening roller 124 in the conveying direction.

[0091] [Configuration of envelope opening and holding unit 160] Next, the configuration of the envelope opening and holding unit 160 provided in the insertion processing unit 120 will be described with reference to Fig. 5. Fig. 5 shows an outline of a portion of the configuration of the insertion processing unit 120 and the main structure of the envelope opening and holding unit 160. The envelope opening and holding unit 160, which serves as an envelope opening and holding means, is disposed between the insertion roller 121 and the first vertical conveying roller 122 on the envelope insertion conveying path 1105.

[0092] Envelope opening and holding section 160 mainly comprises a flap guide plate 161, a first insertion guide claw 162, a second insertion guide claw 163, and a flap holding roller 164.

[0093] The flap guide plate 161 is a plate member for holding the flap ef of the envelope E conveyed along the envelope insertion conveying path 1105 in an open state.

[0094] The first insertion guide claw 162 is a member that moves the flap ef of the envelope E that has been transported to the insertion position toward the flap guide plate 161 side.

[0095] The second enclosing guide claw 163 is a member for rotating the tip of the first enclosing guide claw 162 toward the flap guide plate 161 side.

[0096] The flap holding roller 164 is a flap clamping means for clamping the flap ef pressed against the flap guide plate 161 .

[0097] [Envelope filling and sealing process flow] Next, an example of a series of flows of the enclosing and sealing operations in the enclosing and sealing processing device 100 will be described with reference to Fig. 6 to Fig. 23. Note that in each figure, only components used to explain each operation stage are labeled with reference symbols, etc.

[0098] 6, separation roller 125 rotates to separate envelopes E one by one from a plurality of envelopes E stacked on envelope set tray 127 and send them to envelope carry-in path 1107. Then, envelope carry roller 126 arranged in envelope carry-in path 1107 carries the separated envelopes E to flap opening roller 124.

[0099] At this time, the leading edge and trailing edge in the transport direction of the envelope E are detected by the separation sensor 128. Based on the detection result, the envelope length is calculated as described below.

[0100] When the envelope E is transported through the envelope entrance path 1107, the envelope switchback switching claw 21 is oriented in a direction that allows the envelope E to be transported from the envelope entrance path 1107 to the envelope insertion transport path 1105, as shown in Fig. 6. The envelope discharge switching claw 31 is oriented in a direction that allows the envelope E to enter the envelope insertion transport path 1105 to the sealing transport path 1106, as shown in Fig. 6.

[0101] In addition, the flap opening roller 124, the third vertical transport roller 131, and the fourth vertical transport roller 132 rotate in a direction to transport the envelope E in the -Z direction. As a result, the envelope E reaches the envelope insertion transport path 1105 from the envelope carry-in path 1107.

[0102] 7, before the envelope E has completely passed the flap opening roller 124, the flap ef is opened by the flap opening mechanism 180. At this time, the flap opening roller 124, the third vertical conveying roller 131, and the fourth vertical conveying roller 132 continue to rotate.

[0103] Then, as shown in Figure 8, when the end of the flap ef passes the flap open detection sensor 129, the rotation of the flap opening roller 124, the third vertical conveying roller 131, and the fourth vertical conveying roller 132 temporarily stops, and the envelope E is transitioned to be conveyed in a switchback manner in the envelope insertion conveying path 1105.

[0104] Here, the operation of the flap opening mechanism 180 and the envelope length calculation process in the transport operation of the envelope E from Figure 6 to Figure 8 will be described with reference to Figure 9. First, as shown in Figure 9(a), the leading edge of the envelope E transported toward the flap opening roller 124 is detected by the separation sensor 128 on the way to the nip of the flap opening roller 124.

[0105] 9(b), when the leading edge of the envelope E in the transport direction passes through the nip of the flap opening roller 124 and moves in the -Z direction, the leading edge of the envelope E in the transport direction comes into contact with the flap scoop 181 that was in a normal position so as to block the envelope insertion transport path 1105, and pushes the flap scoop 181. At this time, the flap scoop 181 is pushed by the leading edge of the envelope E in the transport direction and rotates, making it possible for the envelope E to proceed along the envelope insertion transport path 1105. As a result, the envelope E reaches the envelope insertion transport path 1105.

[0106] 9C, when the entire length of envelope E reaches envelope insertion conveying path 1105, the trailing end in the conveying direction of envelope E is also detected as it passes separation sensor 128. That is, based on the time from when separation sensor 128 detects the leading end in the conveying direction to when separation sensor 128 detects the trailing end in the conveying direction (the difference in detection time of the ends in the conveying direction), the conveying speed of envelope E, or the number of rotations of envelope conveying roller 126, it is possible to calculate the first envelope length, which is the envelope length when flap ef is closed.

[0107] Note that the top portion of flap scooping claw 181 that has been pushed and rotated by the leading edge of envelope E in the transport direction slightly pushes up envelope E being transported along envelope feed path 1107, causing envelope E to be slightly curved in envelope feed path 1107. As a result, flap ef of envelope E is slightly open. If envelope E is transported further in this state, the end portion of flap ef is caught by the top portion of flap scooping claw 181.

[0108] Furthermore, when the envelope E is transported by the flap opening roller 124, as shown in Fig. 9(d), the end of the flap ef comes into contact with the top of the flap scooping claw 181 and rotates and opens as the envelope E is transported. With the flap ef in the open state, the envelope E is transported further in the transport direction. The state next to the state illustrated in Fig. 9(d) corresponds to the state already shown in Fig. 8.

[0109] 8, as shown in FIG. 10, when the flap ef of the envelope E is in an open state and reaches a position where the flap ef has passed through the flap opening roller 124, the third vertical conveying roller 131 and the fourth vertical conveying roller 132 rotate in the opposite direction. As a result, the envelope E is conveyed in the +Z direction in the sealing conveying path 1106 and the envelope inserting conveying path 1105. This conveying is called "switchback conveying." Note that before or at the same time as the switchback conveying is started, the envelope switchback switching claw 21 rotates in the direction shown in FIG. 10. As a result, the envelope E becomes capable of being conveyed upward on the envelope inserting conveying path 1105.

[0110] 10, the envelope E is transported by switchback transport to an insertion position, which is a predetermined position of the insertion processing unit 120. As the envelope E is transported by switchback transport, the end of the open flap ef (rear end in the transport direction) is first detected by the flap open detection sensor 129, and then the bottom of the envelope E (leading end in the transport direction) is detected by the flap open detection sensor 129. Note that during switchback transport, the end of the flap ef becomes the leading end in the transport direction, but for consistency of expression, in the following description, the end of the flap ef will be referred to as the "rear end in the transport direction" regardless of the actual movement direction (transport direction) of the envelope E. Also, the bottom side of the envelope E will be referred to as the leading end in the transport direction.

[0111] Therefore, before the flap ef reaches the first vertical transport roller 122, both the end of the flap ef (the trailing end in the transport direction) and the bottom (the leading end in the transport direction) of the envelope E are detected by the flap open detection sensor 129. Based on the detection result of the flap open detection sensor 129, the envelope length when the flap ef is open (second envelope length) can also be calculated from the time from when the trailing end in the transport direction (the end of the flap ef) is detected to when the trailing end in the transport direction (the bottom of the envelope E) is detected, and the transport speed of the envelope E or the rotation speed of the third vertical transport roller 131 and the fourth vertical transport roller 132.

[0112] Then, the length of the flap ef (flap length) can be calculated by subtracting the envelope length when the flap ef is closed (first envelope length) from the envelope length when the flap ef is open (second envelope length).

[0113] 11, the envelope E is transported by the second vertical transport rollers 123 and the first vertical transport rollers 122 until it reaches the insertion position according to the flap length. When the flap ef has left the first vertical transport rollers 122 and reaches the insertion position according to the flap length, the rotation of the second vertical transport rollers 123 and the first vertical transport rollers 122 is stopped, and the insertion standby operation begins.

[0114] In controlling the transport of envelope E to a position for entering this insertion waiting operation, the transport amount of envelope E can be calculated from the amount of rotation of each transport roller after separation roller 125 removes envelope E, and the position of envelope E within envelope insertion transport path 1105 can be determined based on the transport amount and the transport path length.

[0115] Here, using Figures 12 to 14, we will explain the operation from Figure 10 to Figure 11, where the flap ef is held in an open position by the envelope opening holding section 160 and the envelope E is in a state where it can accept the enclosure.

[0116] 12, the rotation of the first vertical conveying roller 122 and the second vertical conveying roller 123 is stopped when the end of the flap ef overlaps the first insertion guide claw 162. The timing at which the rotation of the first vertical conveying roller 122 and the second vertical conveying roller 123 is stopped is obtained by the insertion sealing control unit 150 determining the movement amount of the envelope E and the position of the flap ef from the rotation amount of the conveying rollers and the like according to the already calculated flap length.

[0117] 13, the second insertion guide claw 163 is rotated to rotate the tip of the first insertion guide claw 162 toward the flap guide plate 161. As a result, the flap ef is pushed by the first insertion guide claw 162 toward the flap guide plate 161 in an open state.

[0118] When the flap ef moves toward the flap guide plate 161 in the open state, the first vertical conveying roller 122 and the second vertical conveying roller 123 resume rotation to convey the envelope E in the +Z direction. As a result, the leading end of the flap ef moves along the flap guide plate 161 to the nip of the flap holding roller 164, as shown in FIG.

[0119] When the first vertical conveying roller 122 and the second vertical conveying roller 123 are further rotated to convey the envelope E in the +Z direction, the first insertion guide claw 162 and the second insertion guide claw 163 enter the inside of the envelope E through the opening of the open envelope E. At the same time, the flap ef is held by the nip of the flap holding roller 164.

[0120] 14, the flap ef is held between the flap holding rollers 164, and the opening of the envelope E is widened by the tapered shape of the first and second insertion guide claws 162 and 163. This is the state in which the envelope E is transported to the insertion position and waits for insertion (insertion standby state).

[0121] 15, while the envelope E is in the insertion position waiting for insertion, the inserting and sealing processing device 100 receives the folded sheet Sf from the upstream device (folding processing device 300) by the entrance rollers 101 and conveys it to the first conveying path 1101.

[0122] 16, the folded sheet Sf is transported downstream by the first intermediate transport roller 114 and the first transport roller 111. At this time, since the first switching claw 11 and the third switching claw 13 are in the state shown in FIG. 11, the folded sheet Sf is transported from the first transport path 1101 to the insertion transport path 1104.

[0123] 17, the folded sheet Sf conveyed from the inserting conveying path 1104 to the envelope inserting conveying path 1105 is further conveyed in the -Z direction by the inserting rollers 121. As a result, the folded sheet Sf is held at a predetermined inserting position on the envelope inserting conveying path 1105 by the first vertical conveying rollers 122 and the like, and is inserted into the envelope E that is waiting for insertion.

[0124] At this time, as shown in Fig. 18, the folded sheet Sf, which is the enclosure, is transported between the first enclosure guide claw 162 and the second enclosure guide claw 163 by the enclosure roller 121. As a result, as shown in Fig. 19, the folded sheet Sf pushes aside the second enclosure guide claw 163 and is transported into the inside of the envelope E. At this time, the first vertical conveying roller 122 and the second vertical conveying roller 123 release their pressure to separate the nip, allowing the enclosure to be enclosed.

[0125] Next, as shown in Fig. 20, the first vertical conveying roller 122 and the second vertical conveying roller 123 are rotated to convey the envelope E downward, and as shown in Fig. 21, the envelope E is conveyed to the fourth vertical conveying roller 132. The envelope E after insertion is conveyed until it reaches a position where the flap ef passes through the envelope discharge switching claw 31.

[0126] Thereafter, as shown in FIG. 22, the flap ef is closed by the sealing unit 135 between the third vertical conveying roller 131 and the fourth vertical conveying roller 132 to seal the envelope E.

[0127] 23, the third vertical conveying rollers 131 and the fourth vertical conveying rollers 132 are rotated in the reverse direction, and the sealed envelope E is switchback-conveyed by the third vertical conveying rollers 131 and the fourth vertical conveying rollers 132. Before the third vertical conveying rollers 131 and the fourth vertical conveying rollers 132 are rotated in the reverse direction, the envelope discharge switching claw 31 is rotated to the state shown in FIG. 23. As a result, the enclosed envelope E is conveyed from the insertion conveying path 1104 to the envelope discharge path 1108.

[0128] As a result, the sealed envelope E is discharged onto the envelope discharge tray 134 by the envelope discharge rollers 133, as shown in FIG.

[0129] [Function block of the insertion and sealing control unit 150] Next, the functional blocks of the enclosing and sealing control unit 150 that controls the above-mentioned enclosing operation etc. will be described. As shown in Fig. 25, the functional blocks of the enclosing and sealing control unit 150 include a CPU 151 as a calculation processing means, a ROM 152 that stores a control program executed by the CPU 151, and a RAM 153 that corresponds to a work area when the CPU 151 executes the control program to realize a predetermined control process.

[0130] By executing the control program in the CPU 151, a transport processing function consisting of a transport control unit 1511, a flap length calculation unit 1512, and an open / close state determination unit 1513 is realized.

[0131] The transport control unit 1511 controls the rotation of a transport motor 170 which serves as a drive source for a plurality of transport roller pairs that transport the envelope E. The transport motor 170 is appropriately disposed in the inserting and sealing processing device 100 as a drive source for rotating each of the transport roller pairs already described.

[0132] The transport control unit 1511 controls the rotation speed and amount of rotation of the transport motor 170 and notifies the flap length calculation unit 1512 of this information.

[0133] Flap length calculation unit 1512 receives signals indicating that separation sensor 128 and flap open detection sensor 129 have detected the leading end and trailing end in the conveying direction of envelope E. Then, based on the signals from separation sensor 128 and flap open detection sensor 129 and the notification from conveyance control unit 1511, flap length calculation unit 1512 calculates a first envelope length and a second envelope length, and further calculates a flap length and notifies open / closed state determination unit 1513 of the result.

[0134] Based on the notified flap length, the open / close state determination unit 1513 determines the open / close state of the envelope E. When the open / close state determination unit 1513 determines that the flap ef of the envelope E is not normally open, that is, an abnormal state, it causes the display 191, which corresponds to an example of the configuration of the notification unit 190, to display information notifying the user of the abnormality.

[0135] [Envelope transport process flow] Next, a flow chart will be used to explain the flow of the envelope feeding process, which is one of the operations of the above-described inserting and sealing processing device 100. The envelope conveying process shown in Fig. 26 corresponds to a part of the conveying process for conveying the envelope E to the insertion position during the execution of the envelope inserting process.

[0136] First, the conveyance control unit 1511 controls the rotation of each conveyance roller to separate one envelope E from the envelope set tray 127 and start conveyance (S2601). The conveyance control unit 1511 notifies the flap length calculation unit 1512 of the number of rotations and the amount of rotation of each conveyance roller.

[0137] Next, as already described, while envelope E is being transported through envelope entrance path 1107, separation sensor 128 first detects the leading edge in the transport direction and notifies flap length calculation unit 1512 of the detection result (S2602). Next, separation sensor 128 detects the leading edge in the transport direction and notifies flap length calculation unit 1512 of the detection result (S2603).

[0138] Next, envelope E enters envelope insertion transport path 1105 from envelope entrance path 1107, and the leading edge in the transport direction is detected by flap open detection sensor 129, and the detection result is notified to flap length calculation unit 1512 (S2604). Further, the trailing edge in the transport direction is detected by flap open detection sensor 129, and the detection result is notified to flap length calculation unit 1512 (S2605).

[0139] Next, flap length calculation unit 1512 calculates the first envelope length and the second envelope length, calculates the flap length, and notifies open / close state determination unit 1513 (S2607).

[0140] The open / close state determination unit 1513 determines whether the flap length is equal to or smaller than a predetermined threshold (S2607). The threshold may be set in advance and may be any value that can determine the flap length calculated when the flap ef is not normally open. For example, when the flap length is zero (S2607: NO), an abnormality process (S2609) is executed. The cause of the open / close state of the flap ef being determined to be "abnormal" may be a wrong orientation when the envelope E is placed on the envelope set tray 127, or the flap ef may not be opened sufficiently by the flap opening means. In addition, the variation in detection by the separation sensor 128 and the flap opening detection sensor 129 should also be taken into consideration. Therefore, instead of determining that the flap length is zero as abnormal, a threshold may be set to set a width at which the open / close state is determined to be abnormal. The threshold may be, for example, "several millimeters" and may be a value within a range that can determine that the open / close state of the flap ef is "abnormal" and that the insertion operation cannot be performed normally.

[0141] [First embodiment of abnormality processing] Next, the details of the abnormality processing in S2609 will be described with reference to the flowchart in FIG.

[0142] When the flap length is equal to or less than the threshold value in S2607 (S2607: NO) and the opening / closing state is determined to be abnormal, the envelope discharge switching claw 31 is rotated (S2701) to switch the conveying direction when the envelope E is switched back and conveyed from the envelope insertion conveying path 1105 to the envelope discharge path 1108.

[0143] Next, the third vertical transport roller 131, the fourth vertical transport roller 132, and the envelope discharge roller 133 are rotated to discharge the envelope E onto the envelope discharge tray 134 (S2702).

[0144] Next, the display 191 indicates that the transport of envelope E is abnormal (S2703).

[0145] Here, the above process flow will be supplementarily explained using diagrams showing the transport state. The transport state of envelope E from S2601 to S2606 shown in Fig. 26 is shown in Fig. 28 and Fig. 29. Fig. 28 illustrates an example of the intermediate state from S2601 to S2603. Fig. 29 illustrates an example of the state when the determination process of S2607 is executed following S2606.

[0146] In the state of Fig. 29, the determination process of S2607 is executed, and then, as shown in Fig. 30, envelope E is conveyed to envelope discharge path 1108, and as shown in Fig. 31, envelope E is discharged to envelope discharge tray 134. Then, a message is output to display 191 notifying the user of an abnormality.

[0147] According to the first embodiment described above, by using a separation sensor 128 and a flap open detection sensor 129, which can also be used to detect the transport state or transport abnormalities of the envelope E, it is possible to determine whether the flap ef is normally open, and if there is an abnormality, the transport of the envelope E can be quickly stopped and discharged to the envelope discharge tray 134, and the abnormality can be displayed.

[0148] That is, by utilizing the sensor used for transport control of the envelope E, it is possible to monitor and control non-arrival jams and retention jams while calculating the flap length of the envelope E, making it possible to determine abnormalities.

[0149] Furthermore, even if the envelope E is placed in the correct orientation on the envelope set tray 127, it is possible that the flap ef will not open sufficiently in the flap opening mechanism 180. Therefore, even if the flap ef is in a half-open state, if a threshold value can be selected corresponding to the flap length calculated in S2606, it will be possible to detect and determine whether the flap ef is in a half-open state by comparing it with the calculated flap length.

[0150] [Second embodiment of abnormality processing] Next, another detailed example of the abnormality processing in S2609 will be described with reference to the flowchart in FIG.

[0151] When the flap length is equal to or less than the threshold in S2607 (S2607: NO) and the opening / closing state is determined to be abnormal, the envelope discharge switching claw 31 is rotated (S3201) to switch the conveying direction when the envelope E is switched back and conveyed from the envelope insertion conveying path 1105 to the envelope discharge path 1108.

[0152] Next, the third vertical transport roller 131, the fourth vertical transport roller 132, and the envelope discharge roller 133 are rotated to transport the envelope E to a position where it is sandwiched by the envelope discharge roller 133 (S3202).

[0153] When envelope E is clamped between envelope discharge rollers 133, rotation of envelope discharge rollers 133 is stopped (S3203).

[0154] Next, the display 191 indicates that the transport of envelope E is abnormal (S3204).

[0155] Here, the above process flow will be supplementarily explained using the diagram of the transport mode. The transport mode of the envelope E from S2601 to S2606 shown in Fig. 26 is the same as that of the first embodiment, and is shown in Fig. 28 and Fig. 29. Fig. 28 illustrates an example of the intermediate state from S2601 to S2603. Fig. 29 illustrates an example of the state when the determination process of S2607 is executed following S2606.

[0156] In the state of Fig. 29, the determination process of S2607 is executed, and then when the process proceeds to S3201, S3202, and S3203, envelope E is stopped so as to be held in a state midway to being discharged to envelope discharge tray 134, as shown in Fig. 33. Then, a message is output to display 191 notifying the user of an abnormality.

[0157] According to the second embodiment described above, unlike the first embodiment, the user can easily distinguish between an envelope E that has been normally discharged and an envelope E in which an abnormality has been detected.

[0158] Furthermore, as in the first embodiment, in the second embodiment, by using a separation sensor 128 and a flap open detection sensor 129 that can also be used to detect the transport state or transport abnormalities of the envelope E, it is possible to determine whether the flap ef is normally open, and if there is an abnormality, the transport of the envelope E can be quickly stopped and discharged to the envelope discharge tray 134, and the abnormality can be displayed.

[0159] Furthermore, even if the envelope E is placed in the correct orientation on the envelope set tray 127, it is possible that the flap ef will not open sufficiently in the flap opening mechanism 180. Therefore, even if the flap ef is in a half-open state, if a threshold value can be selected corresponding to the flap length calculated in S2606, it will be possible to detect and determine whether the flap ef is in a half-open state by comparing it with the calculated flap length.

[0160] In addition, the abnormality display is not limited to only displaying information on the display 191, but rather a display means such as an alarm lamp can be provided in the insertion and sealing processing device 100, and the alarm lamp can be turned on or flashed when a flap abnormality (abnormal opening or closing state of the flap ef) is detected.

[0161] Furthermore, the abnormality may be displayed not by the notification unit 190 of the inserting and sealing processing device 100 but by the display unit 210 of the image forming device 200 .

[0162] The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the technical gist of the present invention. The present invention covers all technical matters included in the technical ideas described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various modifications from the disclosed contents. Such modifications are also included in the technical scope described in the claims. [Explanation of symbols]

[0163] 1: Print system 10: Branch claw 11: First replacement claw 12: Second switching claw 13:Third switching claw 21: Envelope switchback switch tab 31: Envelope ejection switch tab 100: Encapsulation and sealing processing device 101: Entrance roller 102: Exit roller 105: Communication line 110: Sheet reversing processing section 111: First conveying roller 112: Second conveying roller 113: Switchback conveyor roller 114: First intermediate conveying roller 115: Second intermediate conveying roller 118: First sheet detection sensor 119: Second sheet detection sensor 120: Encapsulation processing section 121: Enclosed roller 122: First vertical conveying roller 123: Second vertical conveying roller 124: Flap opening roller 125: Separation roller 126: Envelope transport roller 127: Envelope set tray 128: Separate sensor 129: Flap open detection sensor 130: Sealing processing section 131: Third vertical conveying roller 132: Fourth vertical conveying roller 133: Envelope ejection roller 134: Envelope output tray 135: Sealing Department 150: Encapsulation and sealing control section 160: Envelope opening and retaining section 161: Flap guide plate 162: First enclosed guide claw 163: Second enclosed guide claw 164: Flap holding roller 170: Transport motor 180: Flap opening mechanism 181: Flap scooping claw 182: Spring 190: Information Department 191: Display 200: Image forming device 260: Printer control unit 300: Folding device 320: Folding control section 400: Post-processing device 420: Post-processing control unit 1100: Loading route 1101: First conveyor path 1102: Second conveying path 1103: Switchback conveyor 1104: Enclosed transport path 1105: Envelope insertion path 1106: Sealed transport route 1107: Envelope entrance 1108: Envelope discharge path 1109: Sheet exit path 1511: Transport control unit 1512: Flap length calculation unit 1513: Open / close state determination unit [Prior art documents] [Patent documents]

[0164] [Patent Document 1] JP 2011-194651 A

Claims

1. An inserting and sealing device that conveys an envelope to an inserting position and inserts and seals an enclosure, a flap opening means arranged on an envelope transport path along which the envelope is transported to the insertion position, the flap opening means opening a flap of the envelope while the envelope is being transported to the insertion position; a first envelope detection means disposed upstream of the flap opening means in a conveying direction in the envelope conveying path, the first envelope detection means detecting an end of the envelope in the conveying direction during conveyance; a second envelope detection means disposed downstream of the flap opening means in a conveying direction in the envelope conveying path, the second envelope detection means detecting the end of the envelope being conveyed; A control means for controlling an inserting operation of the insert into the envelope; having the first envelope detection means and the second envelope detection means detect upstream and downstream ends of the envelope, respectively; The control means determining whether the flap is open or closed based on a first envelope length calculated based on a detection result of the first envelope detection means as a length of the envelope in the transport direction and a second envelope length calculated based on a detection result of the second envelope detection means; When the open / close state is determined to be abnormal, abnormality processing is performed for the sealing operation. An enclosing and sealing device characterized by the above.

2. The control means An inserting and sealing device as described in claim 1, which determines the opening and closing state based on a first envelope length calculated based on the detection result of the first envelope detection means as the length of the envelope in the conveying direction, and a second envelope length calculated based on the detection result of the second envelope detection means as the length of the envelope in the conveying direction.

3. The control means 3. The inserting and sealing device according to claim 2, wherein the open / closed state is determined according to a flap length, which is a length of the flap in a conveying direction, calculated based on the first envelope length and the second envelope length.

4. The control means An inserting and sealing device as described in claim 2, wherein the opening and closing state is judged to be abnormal when a flap length, which is the length of the flap in the conveying direction calculated by subtracting the first envelope length from the second envelope length, is less than a predetermined threshold value.

5. 5. The inserting and sealing device according to claim 1, wherein the control means stops the inserting operation when it determines that the opening and closing state is abnormal.

6. 5. The inserting and sealing device according to claim 1, wherein the control means, when determining that the opening and closing state is abnormal, ejects the envelope without inserting the enclosure therein.

7. 5. The inserting and sealing device according to claim 1, wherein when the control means determines that the opening and closing state is abnormal, the control means holds the envelope in a state in the middle of being discharged without inserting the enclosure into the envelope.

8. a notification means for notifying a status of the sealing operation, 8. The inserting and sealing device according to claim 1, wherein the control means, when determining that the open / closed state is abnormal, notifies the content of the abnormality processing via the notification means.

9. an image forming apparatus for forming an image on a sheet-like medium; a folding processing device that performs a folding process on the medium on which the image is formed; 9. An image forming system comprising: an inserting and sealing device according to claim 1, which inserts and seals the medium conveyed from the image forming device or the folding device into an envelope.

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