JP2013067487A - Weight detecting device and paper sheet processing apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight detecting device which can continuously detect the weight of a paper sheet conveyed at a high speed accurately, and to provide a paper sheet processing apparatus including the same.SOLUTION: The weight detecting device 10 receives the paper sheet conveyed from the upstream while the paper sheet is sandwiched by rotors 34a and 34b to detect the weight of the paper sheet. The device includes: a support 12 individually disposed on a conveyance path for conveying the paper sheet; a conveying mechanism 14 disposed on the support and for sandwiching the paper sheet with the rotor to convey it, and a weight sensor 16 for detecting the weight of the conveying mechanism during the conveyance of the paper sheet and the support; a detector 50 for detecting a conveying speed of the paper sheet in the upstream conveying mechanism on at least the upstream side farther than the support; and a control unit 52 for controlling the conveying speed of the conveying mechanism so that the conveying speed of the paper sheet by the conveying mechanism corresponds to the detected conveying speed on the basis of speed information obtained by the detector.

Description

  Embodiments described herein relate generally to a weight detection apparatus that measures the weight of a paper sheet such as a postal matter, and a paper sheet processing apparatus that includes the weight detection apparatus.

  As a paper sheet stacking device, for example, in a mail processing machine, the weight of mail being transported is weighed, and whether or not a stamp such as a stamp affixed to the mail is an appropriate amount. to decide. As a device for measuring the weight of a mail piece being transported, for example, a weight detection device for measuring the weight of the entire transport system including the mail piece when the mail piece passes through the transport system in the middle of the transport path with a sensor It has been known.

JP 2011-039055 A

  In such a weight detection device, if the transport speed of the postal matter transported from at least the upstream side does not match the postal matter transport speed in the transport system constituting the weight detection device, the transport system of the weight detection device Pulls the mail piece or receives a sudden input of the mail piece. As a result, the sensor for detecting the weight is influenced by an external force other than the weight, and an unnecessary distortion of the sensor internal member is generated. Moreover, unnecessary vibration is generated in the weight detection device by this disturbance external force. Therefore, the distortion due to the disturbance is superimposed on the distortion of the sensor internal member due to the weight, and the weight detection accuracy is lowered.

  The subject of this invention is providing the weight detection apparatus which can detect the weight of the paper sheet conveyed at high speed continuously and accurately, and the paper sheet processing apparatus provided with this weight detection apparatus.

  According to the embodiment, the weight detection device is a weight detection device that receives a paper sheet conveyed from the upstream side while being sandwiched between rotating bodies and detects the weight of the paper sheet. A support provided independently on a transport path for transporting paper, a transport mechanism provided on the support for transporting paper sheets sandwiched between rotating bodies, the transport mechanism for transporting paper sheets, and Based on a weight sensor that detects the weight of the support, a detector that detects at least the transport speed of the paper sheet in the upstream transport mechanism upstream of the support, and speed information obtained by the detector, And a control device that controls the transport speed of the transport mechanism so that the transport speed of the paper sheet by the transport mechanism matches the detected transport speed.

FIG. 1 is a block diagram schematically illustrating a stamping device including a weight detection device according to a first embodiment. FIG. 2 is a plan view showing the weight detection device. FIG. 3 is a front view of the weight detection device. FIG. 4 is a perspective view and a cross-sectional view showing a weight sensor of the weight detection device. FIG. 5 is a flowchart showing a conveyance speed control operation of the weight detection apparatus. FIG. 6 is a side view showing the weight detection device according to the second embodiment. FIG. 7 is a plan view showing a weight detection device according to a third embodiment. FIG. 7 is a side view of the weight detection device according to the third embodiment. FIG. 9 is a flowchart illustrating a conveyance speed control operation of the weight detection device according to the third embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram schematically showing a mail sorting and stamping apparatus 100 (hereinafter simply referred to as a stamping apparatus 100) as an example of a paper sheet processing apparatus including a weight detection apparatus according to the first embodiment. It is.

  As shown in FIG. 1, the stamping device 100 includes a supply unit 101, a machine detection unit 102, an OCR scanner unit 103, a twist reversing unit 104, and a switchback unit 105 along the conveyance direction of the postal matter M as a paper sheet. , A stamping unit 106, and a section accumulating unit 107. The stamping apparatus 100 includes a transport mechanism 108 that transports the postal matter M along the transport path 1 that passes through the above-described units. Further, the stamping device 100 has an operation panel (not shown) for instructing various operations to the device and for inputting an operation mode switching and displaying an abnormality.

  The supply unit 101 receives, for example, a plurality of standard mail items M having a thickness, a length along the transport direction, a width along a direction perpendicular to the transport direction, and a weight within a certain range. One by one is taken out and supplied to the subsequent processing unit. The transport mechanism 108 transports the supplied postal matter M through the subsequent processing units 102 to 107.

  The machine detection unit 102 detects metal, foreign matter, and hard material included in the postal matter M being conveyed, and also detects two pieces of postal matter M, that is, double feed and short gap, The postal matter M determined to be unprocessable by the processing units 103 to 107 is rejected to an exclusion stacking unit (not shown). The machine detection unit 102 includes a weight detection device (described later) that detects the weight of the mail M being conveyed.

  In addition to this, the machine detection unit 102 detects in advance the length and width along the conveyance direction of the postal matter M in front of the weight detection device, and passes the leading edge of the postal matter M through and behind the timing sensor, which will be described later. By detecting the end passage, information on the transport position of the postal matter M is acquired in advance.

  The OCR scanner unit 103 optically reads and photoelectrically converts the surface of the postal matter M, and acquires classification information such as a postal code and a recipient address written on the postal matter M as an image. In addition, the OCR scanner unit 103 detects the presence and position of a stamp (a fee stamp surface including a fee meter) attached to the postal matter M. The OCR scanner unit 103 has at least two scanner units for reading both sides of the postal matter M because the postal matter M supplied through the supply unit 101 is separated from the front and back.

  The twist reversing unit 104 has a twist reversing path (not shown) that conveys the mail M while twisting it 180 degrees around the central axis extending in the conveyance direction of the mail M. That is, the twist reversing unit 104 reverses only the front and back without changing the transport direction of the mail M. Further, the twist reversing unit 104 has a detour conveyance path (straight path) (not shown) for detouring the sent mail M without sending it to the twist reversing path.

  The switchback unit 105 has two switchback mechanisms (not shown) for reversing the transport direction of the postal matter M by receiving the postal matter M to be transported and sending it out in the reverse direction. The switchback unit 105 also has a detour conveyance path (straight path) that detours the two switchback mechanisms, similarly to the twist reversing unit 104 described above.

  The stamping unit 106 has a stamping hub (not shown) that rotates in contact with one surface of the mail M to be conveyed. In the stamping part 106, this stamping hub is brought into rolling contact with the part of the stamp to stamp the postmark. In this embodiment, since all the mail items M transported to the stamping unit 106 pass through the twist reversing unit 104 and the switchback unit 105 and the front and back sides and the top and bottom are aligned, the stamping hub is connected to one side of the transporting path 1. It is provided only for.

  The sorting and accumulating unit 107 sorts and accumulates each postal matter M at a predetermined sorting position according to the sorting information detected by the OCR scanner unit 103. Further, the sorting and accumulating unit 107 has an unillustrated excluding and accumulating unit that prohibits the stamping unit 106 from impressing the postal matter M or the like temporarily staying in the switchback unit 105 and sending it out.

  Whether the stamp device 100 is, for example, an appropriate amount of money stamps such as stamps read from the postal matter M by the OCR scanner unit 103 with respect to the weight of the postal matter M measured by the weight detection device described above. It is judged whether or not the postal matter M, which has been judged to be insufficient in charge, is not stamped by the stamping unit 106.

  Next, the weight detection apparatus 10 will be described in detail. FIG. 2 is a plan view of the weight detection apparatus 10 according to the first embodiment for detecting (determining) the weight of the postal matter M passed through the machine detection unit 102 through the conveyance path 1, and FIG. 3 is a weight detection apparatus. FIG. 4 shows a weight sensor in the weight detection device.

  The weight detection apparatus 10 according to the present embodiment can reduce the weight of a plurality of pieces of mail M that are continuously conveyed at a relatively high speed via the conveyance path 1 without stopping or decelerating the conveyance of the mail M. It is possible to measure sequentially. In the present embodiment, the postal matter M passing through the machine detection unit 102 including the weight detection device 10 is transported through the transport path 1 in a standing state, that is, with the transport surface extending in the vertical direction. .

  As shown in FIG. 1 and FIG. 2, the machine detection unit 102 is similar to the upstream transport mechanism 30 that transports the postal matter M along the transport path 1 in the standing state, and similarly, the postal matter M is transported to the transport path 1. A downstream side transport mechanism 40 that transports in a standing state along the upstream side, and the weight detection device 10 is provided in the transport path 1 between the upstream side transport mechanism 30 and the downstream side transport mechanism 40, and the upstream side transport mechanism After receiving the postal matter M conveyed from 30 and detecting the weight of the postal matter, the postal matter M is sent out to the downstream side transport mechanism 40.

  The upstream transport mechanism 30 includes two sets of transport rollers 34 a and 34 b and 35 a and 35 b provided on the base 32 of the machine detection unit 102. Each transport roller is attached to a rotary shaft 36 that is erected on the base 32 substantially vertically, and can rotate integrally with the rotary shaft. Each pair of transport rollers 34a, 34b or 35a, 35b is positioned adjacent to each other and transports the mail M with the mail M interposed therebetween. The two sets of transport rollers 34a, 34b and 35a, 35b are arranged along the transport path 1 with an interval slightly shorter than the length of the shortest mail item. The upstream transport mechanism 30 includes an injection motor 45 that rotates the rotation shaft of the transport roller, and rotates the transport roller to transport the postal matter M between the transport rollers at a predetermined transport speed. To do. A passage sensor 31 that detects passage of the postal matter M is provided on the downstream side of the upstream transport mechanism 30.

  Similarly, the downstream side transport mechanism 40 includes two sets of transport rollers 42 a and 42 b and 43 a and 43 b provided on the base 32 of the machine detection unit 102. Each transport roller is attached to a rotation shaft 44 that is erected on the base 32 substantially vertically, and can rotate integrally with the rotation shaft. Each pair of transport rollers 42a and 42b or 43a and 43b is positioned adjacent to each other and transports the mail M with the mail M interposed therebetween. The two sets of transport rollers 42a, 42b and 43a, 43b are disposed along the transport path 1 with a distance slightly shorter than the length of the shortest mail item. Further, the downstream mechanism 40 includes an injection motor that rotates the rotation shaft of the conveyance roller, and conveys the mail M at a predetermined conveyance speed with the conveyance roller sandwiched between the conveyance rollers. The injection motor to be driven may be an injection motor common to the upstream side transport mechanism 30. In the vicinity of the upstream side of the downstream side transport mechanism 40, a passage sensor 41 that detects passage of the postal matter M is provided.

  The weight detection device 10 includes a support 12 that is independently arranged with a gap in a recess 46 formed on the upper surface of the base 32 between the upstream-side transport mechanism 30 and the downstream-side transport mechanism 40; A detection-side transport mechanism 14 that is provided on the support 12 and transports the mail M sandwiched between rotating bodies; a weight sensor 16 that detects the weight of the transport mechanism 14 and the support 12 that is transporting the mail; It has.

  The support 12 is formed in, for example, a rectangular plate shape, and the upper surface thereof is located on substantially the same plane as the upper surface of the base 32 and constitutes a part of the transport path 1. The transport mechanism 14 has two sets of transport rollers 18 a and 18 b and 20 a and 20 b provided on the support 12. Each transport roller is attached to a rotary shaft 22 that is erected substantially vertically on the support 12 and can rotate integrally with the rotary shaft. Each pair of transport rollers 18a, 18b or 20a, 20b is located adjacent to each other and transports the mail M with the mail M interposed therebetween. The two sets of transport rollers 18a, 18b and 20a, 20b are arranged along the transport path 1 with an interval slightly shorter than the length of the shortest mail item. Further, the transport mechanism 14 includes a servo motor 24 that is placed on the support 12 and rotates the rotation shaft 44 of the transport roller, and rotates the transport rollers 18a, 18b, 20a, and 20b so that the transport rollers are spaced between the transport rollers. The mail M is transported at a predetermined transport speed with the mail M interposed therebetween.

  The weight sensor 16 is, for example, a force sensor, and is installed on the bottom surface of the recess 46 formed in the base 32, and the support 12 is placed on the weight sensor 16. As shown in FIG. 4, the weight sensor 16 is provided in contact with a cylindrical case 23 closed at both ends, a detection rod 25 provided in the case 23 movably along the vertical direction, and a lower end of the detection rod. The bending portion (diaphragm) 26 and the bending portion 27 are arranged so as to be opposed to each other with a gap therebetween, and the bending portion (displacement) of the bending portion is detected in a non-contact manner. The upper end portion of the detection rod 25 protrudes upward from the case 23, and the support 12 is fixed and supported on the upper end of the detection rod. A stopper 28 that restricts excessive movement of the detection rod and prevents breakage is provided in the middle of the detection rod 25. When the detection rod 25 moves under the load of the support body 12, the transport mechanism 14, and the postal matter M, the deflection portion 26 bends, and the deflection is detected by the deflection detection portion 27. Is detected.

  As shown in FIG. 3, the weight detection device 10 includes, for example, an encoder 50 that detects the rotation speed of the roller rotation shaft 36 as an encoder that detects the conveyance speed of the postal matter M in at least the upstream conveyance mechanism 30, and an encoder 50, a control device 52 that controls the transport speed of the transport mechanism 14 so that the transport speed of the postal matter M by the transport mechanism 14 matches the detected transport speed, and a weight sensor. And an arithmetic unit 54 that processes the 16 detection signals and measures the weight.

  The control device 52 calculates the transport speed of the postal matter M in the upstream transport mechanism 30 based on the detection signal from the encoder 50, and the rotation of the servo motor 24 of the weight detection device 10 according to the calculated transport speed. Control the speed. The arithmetic unit 54 detects the total weight of the weight detection device and the postal matter M while the postal matter M passes through the weight detection device 10, and subtracts the weight of the weight detection device 10 from the total weight. The weight of the object M is calculated.

Next, the operation of the weight detection apparatus 10 configured as described above will be described.
As the operation of the stamping device 100 starts, the upstream side transport mechanism 30, the downstream side transport mechanism 40, and the transport mechanism 14 of the weight detection device 10 are each driven at a predetermined transport speed. As shown in FIG. 5, the control device 52 of the weight detection apparatus 10 measures the rotational speed ωb of the transport rollers 34a and 34b in the upstream transport mechanism 30 based on the detection signal from the encoder 50 (S1), and this rotation. From the speed ωb and the radius Rb of the transport rollers 34a and 34b, the transport speed Vb (= ωb × Rb) of the postal matter M in the upstream transport mechanism 30 is calculated (S2). Further, the control device 52 includes transport rollers 18 a, 18 b, 20 a, for matching the transport speed Vb of the postal matter M in the upstream transport mechanism 30 with the transport speed of the postal matter M in the transport mechanism 14 of the weight detection device 10. The rotational speed of 20b, that is, the rotational speed ωd to be realized is calculated from the calculated transport speed Vb and the radius Rw of the transport rollers 18a, 18b, 20a, 20b of the weight detection device 10 (ωd = Vb ÷ Rw). (S3).

  Next, the control device 52 obtains an error Δω between the calculated rotation speed ωd to be realized and the actual rotation speed ωr of the transport rollers 18a, 18b, 20a, 20b (S4), and whether or not the error Δω is zero. Is detected (S5). The actual rotational speed ωr of the transport rollers 18a, 18b, 20a, and 20b is obtained by detecting the rotational speed of the servo motor 24 of the transport mechanism 14 by the control device 52. When the error Δω is zero, that is, when the postal matter transport speed by the upstream side transport mechanism 30 matches the postal matter transport speed by the transport mechanism 14 of the weight detection device 10, the control device 52 Operations S1 to S5 are repeated. When the error Δω is not zero, that is, when the postal matter transport speed by the upstream side transport mechanism 30 matches the postal matter transport speed by the transport mechanism 14 of the weight detection device 10, the control device 52 Then, the rotational speed of the servo motor 24 is controlled, and the rotational speed ωr of the transport rollers 18a, 18b, 20a, 20b is adjusted to a rotational speed ωnew = ωb + Δω at which the error Δω becomes zero (S6). Thereby, the control device 52 detects the upstream transport mechanism 30 in which the transport speed of the postal matter M by the transport mechanism 14 of the weight detection device 10 is detected based on the speed information obtained by the encoder 50 during the operation of the device. The transport speed of the transport mechanism 14 is controlled so as to coincide with the transport speed by.

  The weight detection device 10 receives the postal matter M sent from the upstream side transport mechanism 30 and transports the postal matter M at the same transport speed as the upstream side transport mechanism 30 as described above by the transport mechanism 14. The postal matter M is sent to the downstream side transport mechanism 40. At that time, the weight detection device 10 detects the leading edge of the postal matter M by the passage sensor 41 of the downstream side transport mechanism 40 from the time when the rear end of the postal matter M is detected by the passage sensor 34 of the upstream side transport mechanism 30. The weight is detected during That is, the weight detection device 10 performs weight detection while the postal matter M is sandwiched between the transport rollers 18a, 18b, 20a, and 20b and moves on the support 12. The arithmetic unit 54 detects the total weight of the support 12, the transport mechanism 14, and the postal matter M based on the detection signal of the weight sensor 16 while the postal matter M passes through the weight detection device 10. The weight of the postal matter M is calculated by subtracting the weights of the support 12 and the transport mechanism 14 stored in advance.

  According to the weight detection device 10 configured as described above, when measuring the weight of mail in the middle of being transported at high speed and high density, the mail transport speed at least in the upstream transport mechanism 30 of the weight detection device. Is matched with the transport speed of the mail in the transport mechanism 14 of the weight detection device, thereby reducing the disturbance external force in the weight measurement due to the pull of the post and the postal collision of the mail in the transport mechanism 14 of the weight detection device. can do. As a result, it is possible to reduce the occurrence of distortion due to external external forces other than distortion due to weight on the internal member of the weight sensor 16 that measures the weight, and to prevent unnecessary vibration from being generated in the weight detection device. It is possible to continuously and accurately detect the weight of the mail being conveyed.

A paper sheet processing apparatus comprising:

  Next, a weight detection device according to another embodiment will be described. In the various embodiments described below, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted, and the parts different from those in the first embodiment. Will be described in detail.

(Second Embodiment)
FIG. 6 shows a weight detection apparatus according to the second embodiment. In the first embodiment described above, an encoder is used as a detector for detecting the transport speed of the upstream transport mechanism, but the present invention is not limited to this, and another detector may be used. As shown in FIG. 6, according to the second embodiment, the weight detection device 10 includes a tacho generator 60 as a detector. The tacho generator 60 generates a voltage proportional to the rotational speed of the rotary shaft 36 of the transport rollers 34a and 34b in the upstream transport mechanism 30, and detects the rotational speed (angular velocity). The control device 52 calculates the transport speed of the postal matter M by the upstream transport mechanism 30 based on the number of rotations detected by the tacho generator 60, and the hot water and stool by the transport mechanism 14 of the weight detection device 10. The drive motor of the transport mechanism 14 is controlled so that the transport speeds of the objects match.

(Third embodiment)
7 and 8 show the weight detection device 10 according to the third embodiment, and FIG. 9 is a flowchart showing the conveyance speed detection and control operation.
As shown in FIGS. 7 and 8, according to the third embodiment, the weight detection device 10 includes two sets of optical sensors 70a and 70b as detectors. One set of optical sensors 70a is disposed, for example, on the upstream side of the transport roller 34a in the upstream side transport mechanism 30 with the transport path 1 interposed therebetween, and the other set of optical sensors 70b is transported on the upstream side of the transport roller 34a. 1 are arranged on both sides. These two sets of optical sensors 70a and 70b respectively detect the passage of the mail piece M being conveyed, that is, the leading end of the mail piece M. The optical sensors 70 a and 70 b are provided along the conveyance path 1 with a distance d.

  As shown in FIG. 9, in controlling the conveyance speed, first, the tip of a postal matter (letter) conveyed by the upstream side transport mechanism 30 is detected by the optical sensor 70a, and the control device 52 detects that the postal matter is the optical sensor 70a. Is stored (S1). Further, the control device 52 detects the tip of the postal matter M with the optical sensor 70b, and stores the time T2 when the postal matter passes the optical sensor 70b (S2). The control device 52 calculates the transport speed Vb (= d ÷ (T2−T1)) of the postal matter M in the upstream transport mechanism 30 from the detected times T1 and T2 and the interval d between the optical sensors 70a and 70b ( S3).

  Further, the control device 52 includes transport rollers 18 a, 18 b, 20 a, for matching the transport speed Vb of the postal matter M in the upstream transport mechanism 30 with the transport speed of the postal matter M in the transport mechanism 14 of the weight detection device 10. The rotational speed of 20b, that is, the rotational speed ωd to be realized is calculated from the calculated transport speed Vb and the radius Rw of the transport rollers 18a, 18b, 20a, 20b of the weight detection device 10 (ωd = Vb ÷ Rw). (S4).

  Next, the control device 52 obtains an error Δω between the calculated rotation speed ωd to be realized and the actual rotation speed ωr of the transport rollers 18a, 18b, 20a, and 20b (S5), and whether or not the error Δω is zero. Is detected (S6). The actual rotational speed ωr of the transport rollers 18a, 18b, 20a, and 20b is obtained by detecting the rotational speed of the servo motor 24 of the transport mechanism 14 by the control device 52.

  When the error Δω is zero, that is, when the postal matter transport speed by the upstream side transport mechanism 30 matches the postal matter transport speed by the transport mechanism 14 of the weight detection device 10, the control device 52 Operations S1 to S5 are repeated. When the error Δω is not zero, that is, when the postal matter transport speed by the upstream side transport mechanism 30 matches the postal matter transport speed by the transport mechanism 14 of the weight detection device 10, the control device 52 Then, the rotational speed of the servo motor 24 is controlled, and the rotational speed ωr of the transport rollers 18a, 18b, 20a, 20b is adjusted to a rotational speed ωnew = ωb + Δω at which the error Δω becomes zero (S7). As a result, the control device 52 detects the upstream side in which the transport speed of the postal matter M by the transport mechanism 14 of the weight detection device 10 is detected based on the speed information obtained by the optical sensors 70a and 70b during the operation of the device. The conveyance speed of the conveyance mechanism 14 is controlled so as to coincide with the conveyance speed by the conveyance mechanism 30.

  In the second and third embodiments, other configurations of the weight detection device 10 are the same as those of the first embodiment described above. In the second and third embodiments as well, a weight detection device that can continuously and accurately detect the weight of mails conveyed at high speed and high density is obtained.

The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
For example, the paper sheets to be processed are not limited to mail, but may be applied to other paper sheets such as securities and banknotes. In the transport mechanism, the rotating body that transports the paper sheet is not limited to the transport roller, and a transport belt or the like can be used. The weight sensor is not limited to the force sensor, and other sensors may be used.

DESCRIPTION OF SYMBOLS 10 ... Weight detection apparatus, 12 ... Support body, 14 ... Conveyance mechanism, 16 ... Weight sensor,
18a, 18b, 20a, 20b ... conveying roller, 22 ... rotating shaft,
24 ... Servo motor, 30 ... Upstream transport mechanism, 32 ... Base,
34a, 34b, 35a, 35b ... conveying roller, 36 ... rotating shaft,
40 ... downstream side transport mechanism, 42a, 42b, 43a, 43b ... transport roller,
44 ... Rotary shaft, 50 ... Encoder, 52 ... Control device, 54 ... Calculation device,
60 ... Tacho generator, 70a, 70b ... Optical sensor

Claims (7)

A weight detection device that receives paper sheets conveyed from the upstream side in a state sandwiched between rotating bodies and detects the weight of the paper sheets,
A support provided independently in the transport path for transporting paper sheets;
A transport mechanism that is provided on the support and transports a paper sheet sandwiched between rotating bodies; a weight sensor that detects the weight of the transport mechanism and the support that is transporting the paper sheet;
A detector that detects the conveyance speed of the paper sheet in the upstream conveyance mechanism at least upstream of the support;
Based on the speed information obtained by the detector, a control device that controls the transport speed of the transport mechanism so that the transport speed of the paper sheet by the transport mechanism matches the detected transport speed;
A weight detection device comprising: The transport mechanism includes a plurality of rotating bodies that transport paper sheets and a drive motor that rotates at least one of these rotating bodies,
The said control apparatus controls the rotational speed of the said drive motor so that the difference of the conveyance speed detected by the said detector and the conveyance speed of the paper sheets by the said conveyance mechanism may become zero. Weight detection device.   The weight detector according to claim 1, wherein the detector includes an encoder that detects a rotational speed of a rotating body in the upstream side transport mechanism.   The weight detector according to claim 1, wherein the detector includes a octopus generator that detects a rotational speed of a rotator in the upstream transport mechanism.   The weight detector according to claim 1, wherein the detector includes an optical sensor that detects passage of paper sheets in the upstream side transport mechanism. An upstream transport mechanism that is provided in a transport path for transporting paper sheets and transports the paper sheets with a plurality of rotating bodies;
A downstream side transport mechanism that is provided in the transport path and transports the paper sheets with a plurality of rotating bodies;
A weight detection device that is provided in the transport path between the upstream transport mechanism and the downstream transport mechanism, receives paper sheets transported from the upstream transport mechanism, and detects the weight of the paper sheets; With
The weight detection device includes a support provided independently in the transport path, a transport mechanism provided on the support and transporting a paper sheet sandwiched between rotating bodies, and transporting the paper sheet. Based on the weight sensor that detects the weight of the transport mechanism and the support, the detector that detects at least the transport speed of the paper sheet in the upstream transport mechanism, and the speed information obtained by the detector, the transport A paper sheet processing apparatus, comprising: a control device that controls the transport speed of the transport mechanism so that the transport speed of the paper sheet by the mechanism matches the detected transport speed. The transport mechanism includes a plurality of rotating bodies that transport paper sheets and a drive motor that rotates at least one of these rotating bodies,
The said control apparatus controls the rotational speed of the said drive motor so that the difference of the conveyance speed detected by the said detector and the conveyance speed of the paper sheets by the said conveyance mechanism may become zero. Paper sheet processing equipment.

Images