CN2213143Y - Floating paper hold device with constant pressure - Google Patents

Abstract

The utility model relates to a floating paper hold device with constant pressure, which is composed of a mechanical part, and an electric apparatus part. The mechanical part is mainly characterized in that both a wheel 2 for feeding paper and a paper hold board 8 are floating; a position sensor 1 is linked with the wheel 2 for feeding paper; the movement of the paper hold board 8 in the vertical direction is driven by a motor 4 through a synchronous belt 5, a slider 7, and a sliding axle 6. The electric apparatus part is mainly composed of a tank photocoupler O < 1 >, operational amplifiers U< 1 >: A, U< 1 >: B, U< 1 >: C, and U< 1 >: D, photocoupling barrier devices N< 1 > and N< 2 >, and triodes T< 1 >, T< 2 >, and T < 3 >. The utility model has the advantages that pressure between the wheel for feeding paper and a paper can not change with the displacement of the paper hold board and the number of the papers, so the phenomenon that double papers appear in the process of feeding for the papers is fundamentally solved.

Description

Floating paper hold device with constant pressure

The utility model relates to the paper feeder of messaging device, is a kind of unsteady paper cabin device of constant pressure specifically.

Messaging device as duplicator, duplicating machine, OMR and Character recognizer etc., all exists one the paper in the paper cabin sent over one by one, and the problem of not re-opening.The paper cabin mechanism of at present various traditional messaging devices adopts paper-sheets rolling wheel to fix, and the mode that paper cabin plate floats makes paper-sheets rolling wheel and paper produce certain pressure, and frictionally is advanced by paper-sheets rolling wheel drive paper.The unsteady of paper cabin plate is to realize by spring.Because paper cabin plate and paper weight alter a great deal under different situations; be subjected to the influence of spring inherent characteristic, its pressure changes with the variation of displacement in addition, Gu this; pressure between paper-sheets rolling wheel and the paper is difficult to protect a definite value, causes the stranding power of rubbing between the two inconsistent.Like this, very easily cause the phenomenon of re-opening in the paper feeding process, the paper-sheets rolling wheel band several paper and is sent to, influences normal operation.

The purpose of this utility model provides a kind of unsteady paper cabin device of constant pressure, and the pressure between its paper-sheets rolling wheel and the paper does not move with the paper freight space or what of paper change, and protects constantly, fundamentally solves the phenomenon of re-opening in the paper feeding process.

The utility model is achieved in that the unsteady paper cabin device of constant pressure is made of machinery and electrical equipment two parts.Mechanics mainly by position transduser 1, paper-sheets rolling wheel 2, pressure roller 3, motor 4, be with 5 synchronously, slide shaft 6, cliding seat 7, paper cabin plate 8, sensor light barrier 9, driving wheel 10, mainboard 11, paper-sheets rolling wheel pivot shaft 12, sliding wheel 13 and elastic 14, spring 15 form.Paper-sheets rolling wheel 2 and paper cabin plate 8 all float.Floating of paper-sheets rolling wheel 2 realizes by self gravity and spring 15.Fluctuating then by forward and reverse rotation of motor 4 of paper cabin plate 8 realized by mechanical drive.The rotation of motor 4 is by position transduser 1 control.Position transduser 1 links with paper-sheets rolling wheel 2, can accurately reflect paper-sheets rolling wheel 2 residing positions.When paper-sheets rolling wheel 2 and contacting of paper were too low, signal control motor 4 forward rotation of position transduser 1 output rose paper cabin plate 8, contact point is raised, otherwise, when the contact point of paper-sheets rolling wheel 2 and paper is too high, position transduser 1 output signal control motor 4 backward rotation descend paper cabin plate 2.Reduce contact point.Like this, when normal operation, contact point always is in an equilibrium point position, is higher or lower than equilibrium point, and position transduser 1 all can be controlled motor 4 makes paper cabin 8 rise or descend, and is returned near the equilibrium point.At this moment, paper cabin plate 8 is motionless relatively, and the pressure of 2 pairs of paper of paper-sheets rolling wheel is constant, thereby prevents the phenomenon of re-opening in the paper feeding process effectively.

Concrete physical structure of the present utility model is: position transduser 1 is interlocks with paper-sheets rolling wheel 2, and paper-sheets rolling wheel 2 links to each other with driving wheel 10 by elastic 14, light barrier 9 and paper-sheets rolling wheel pivot shaft 12 relative fixed.Spring 15 is connected between paper-sheets rolling wheel 2 and the mainboard 11, and motor 4 is fixed on the support, is with 5 to be enclosed within on electric machine main shaft and four sliding wheels 13 synchronously, slide 7, synchronously with 5 and paper cabin plate 8 connect together.Slide 7 and two slide shafts 6 are bearing fit.When slide 7 floats, light barrier 9 and sensor 1 relative motion, the output signal of sensor 1 changes, and control motor 4 rotates forward or backwards.The rotation of motor 4 by be with 5 synchronously, cliding seat 7 drives paper cabin plate 8 up-and-down movements.Itself has auto-lock function motor.

The utility model circuit part is mainly by grooved optocoupler O ₁, op amp U ₁: A, U ₁: B, U ₁: C, U ₁: D(LM324A), light-coupled isolation device N ₁, N ₂, aerotron T ₁, T ₂, T ₃Form.Grooved optocoupler O ₁Be used for position transduser, the signal of output is through op amp U ₁: A penetrates subsequently and op amp U ₁: the in-phase end of B and U ₁: the end of oppisite phase of D connects.U ₁: the end of oppisite phase of B and U ₁: the in-phase end of D meets a VREF (Voltage Reference) V respectively _R1, V _R2V _R1Voltage is higher than V _R2Like this, be lower than V when sensor output voltage _R2The time, U ₁: D exports high level, U ₁: the B output low level.Sensor output signal is higher than V _R2But be lower than V _R1The time, U ₁: D and U ₁: B is output low level.When sensor signal is higher than V _R1The time, U ₁: D output low level, U ₁: B exports high level.U ₁: D and U ₁: the output of B is respectively by resistance and light-coupled isolation device N ₁, N ₂Diode cathode connect.N ₁Diode negative terminal and aerotron T ₃Collecting electrode link to each other.Aerotron T ₃Base stage and emitter meet external control signal UP, DOWN respectively.N ₁, N ₂Conducting control the rotating of motor M respectively.N ₁, N ₂Not conducting simultaneously.During work, the UP level is high, and the DOWN level is low, aerotron T ₃Conducting, like this, when the paper-sheets rolling wheel position was low, its output signal was less than V _R1, V ₁: D exports high level, optocoupler N ₁Conducting, N ₂End op amp U ₁: the in-phase end voltage of C is positive voltage.Amplifier U ₁: the output of C is by a resistance R ₇With aerotron T ₁, T ₂Base stage link to each other.Make aerotron T ₁Conducting provides a positive voltage of motor M, and motor M is just changeed, and makes on the paper cabin to rise.Along with the rising in paper cabin, sensor output signal changes, when its voltage is higher than V _R2The time,, U ₁: D output becoming again low level, N ₁End, the voltage that is reflected to like this on the motor is zero, and motor does not change, and the paper cabin is motionless.At this moment be operated on the equilibrium point.Along with the minimizing of paper in the paper cabin, position sensor output signal diminishes, when less than V _R2The time, U ₁: the output of D becomes high level, N again ₁Conducting again, control paper cabin rises to equilibrium point.The decline in paper cabin is by external signal DOWN and U ₁: the output of B is controlled.When DOWN was high level, no matter UP level height, aerotron ended, N ₁Always end N ₂Conducting.Like this, op amp U ₁: the voltage of the in-phase end of C is negative voltage, is reflected to T ₁, T ₂The voltage of base stage also is negative voltage, aerotron T ₂Conducting provides motor M a negative voltage, makes the motor M counter-rotating, and the paper cabin descends.Equally, when the paper-sheets rolling wheel position was too high, sensor output signal was greater than V _R1, U ₁: B exports high level, makes N ₁End N ₂Conducting makes the motor counter-rotating, and the paper cabin descends.

The utility model has the advantages that: the pressure between the paper-sheets rolling wheel paper does not change with what of the displacement of paper cabin plate and paper, can protect constantly, has fundamentally solved the phenomenon of re-opening in the paper feeding process.

Accompanying drawing is depicted as an embodiment of the present utility model.

Fig. 1 is the electrical schematic diagram of the unsteady paper cabin device of constant pressure;

Fig. 2 is the unsteady paper cabin device front elevation of constant pressure;

Fig. 3 is that the A of Fig. 2 is to view.

Claims (2)

1, a kind of unsteady paper cabin device of constant pressure, forms by machinery and circuit two parts, it is characterized in that mechanics mainly is made up of position transduser (1), paper-sheets rolling wheel (2), pressure roller (3), motor (4), synchronous (5), slide shaft (6), cliding seat (7), paper cabin plate (8), sensor light barrier (9), driving wheel (10), mainboard (11), paper-sheets rolling wheel pivot shaft (12), sliding wheel (13), elastic (14) and the spring 15 be with; Paper-sheets rolling wheel (2) and paper cabin plate (8) all float; Position transduser (1) links with paper-sheets rolling wheel (2), and paper-sheets rolling wheel (2) links to each other with driving wheel (10) by elastic (14), light barrier (9) and paper-sheets rolling wheel pivot shaft (12) relative fixed; Spring (15) is connected between paper-sheets rolling wheel (2) and the mainboard (11), and motor (4) is fixed on the pedestal, and band (5) is enclosed within on electric machine main shaft and four sliding wheels (13) synchronously; Slide (7), synchronous band (5) and paper cabin plate (8) connect together; Slide (7) is bearing fit with two slide shafts (6).

2, the unsteady paper cabin device of constant pressure according to claim 1, the circuit that it is characterized in that this device is mainly by grooved optocoupler O ₁, op amp U ₁: A, U ₂: B, U ₁: C, U ₁: D, light-coupled isolation device N ₁, N ₂, aerotron T ₁, T ₂, T ₃Form; Grooved optocoupler O as position transduser ₁Output signal is through op amp U ₁: A penetrates subsequently, with op amp U ₁: the in-phase end of B and U ₁: the end of oppisite phase of D connects; U ₁: the end of oppisite phase of B and U ₁: the in-phase end of D is connected on a VREF (Voltage Reference) V respectively _R1, V _R2U ₁: D and U ₁: the mouth of B is respectively by resistance and light-coupled isolation device N ₁, N ₂Diode cathode connect; N ₁Diode negative terminal and aerotron T ₃Collecting electrode link to each other; Aerotron T ₃Base stage and emitter meet external control signal UP, DOWM respectively; Light-coupled isolation device N ₁, N ₂Conducting control the forward and reverse rotation of motor M respectively; Op amp U ₁: the mouth of C is by a resistance R ₇With aerotron T ₁, T ₂Base stage link to each other.

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