JPH085035B2 - Device for dispensing a paper web of a predetermined length from a paper roll - Google Patents

Description

The present invention relates to a dispenser device for dispensing a predetermined length of paper towel from a continuous paper web supply roll.

As a dispenser of this kind, by pushing a push button or a lever to advance a paper web of a predetermined length to the outside of the dispenser, and usually by pressing a saw tooth against a cut blade to tear off the protruding paper web length, It is known that the user can remove the paper towel by hand.

This known dispenser has a number of drawbacks, the main ones of which are: The length of the paper web dispensed each time is strictly predetermined at the time of device design and cannot be changed or cannot be changed without replacing a significant part of the dispensing mechanism. This is a drawback for manufacturers who want to sell multiple models of the same device or who want to modify an existing model slightly to meet customer requirements. Further, if the dispensed paper is too long or too short, the paper is wasted. This is because in the latter case, the user will have to draw another paper towel from the device.

A second drawback of conventional dispensers is that they often cause equipment failure because the user has to force the dispensed web to be removed. It should be noted that when tearing the web, the user's hands are wet and relatively tear resistant paper cannot be used. On the other hand, two thin leaf papers are highly desirable in terms of their absorbency, flexibility and cost, but cannot withstand the pulling action with wet hands.

The conventional dispenser, described in U.S. Pat.No. 3,408,125, involves a user manually pulling and cutting a piece of paper, which stores some of the power it receives, so that after a certain number of cycles, Will be fed outwardly with the length of paper to start a new cycle.

U.S. Pat.No. 3,730,409 describes a dispenser device in which the cutting of the outwardly directed paper web is manually performed by the user, which actuates an electric motor which provides additional paper length. ing.

U.S. Pat.No. 4,131,044 describes a dispenser of the type designed to allow a predetermined paper length to be manually withdrawn while at the same time storing power to actuate a movable blade that cuts the paper web. .

U.S. Pat. No. 4,697,146 describes a manual dispenser device in which only a predetermined length of paper web can be pulled out and torn off by a timer that prevents the paper web from being unwound from a roll. A portion of the applied power is stored and, after being torn off, a predetermined length of paper is supplied so that the paper can be grasped externally to start the next cycle. The length of the piece of paper to be dispensed can be preselected from two or three values by operating the dispensing mechanism.

All of these devices provide completely manual operation. However, only the device described in U.S. Pat. No. 3,730,409 is motorized only by the feeder, but the cutting must still be done manually by the user. Therefore,
The above-mentioned drawbacks remain unsolved, and even in the last-mentioned U.S. patent, a certain length of paper remains exposed outside the device, which is not hygienic.

Therefore, an object of the present invention is to provide a dispenser for dispensing a paper web that can be used as a towel, so that even an unskilled person can accurately determine the length of the web to be dispensed outside without the need for mechanical adjustment of the dispenser. To provide such a device that can be adjusted.

Another object of the present invention is to automatically feed the dispensed web and partially cut it so that the cut towels can be hung without falling from the device to achieve a complete pull with minimal pulling force. It is to provide a dispenser device which can be removed.

Another object of the present invention is to provide an automatic towel dispenser which does not require forcing or physical contact for starting and which allows the user to dispense a paper towel without touching it.

Yet another object of this invention is that the adjustable dispensing and cutting of the paper can be done by the same power means, and thus another motor or temporary power storage for actuating the cutting device at the end of the dispensing process. It is to provide a dispenser which does not require the provision of a second power source such as a means.

Another object of the present invention is to provide a battery operated dispensing mechanism of the type described above.

These and other objects are met by the present invention. That is, the device for dispensing a predetermined length of paper web from a paper roll according to the present invention comprises a housing with a slot through which the paper web wound from the paper roll is guided to the outside,
An electric motor capable of rotating in two directions, a device for advancing a paper web through the slot, a device for transversely cutting at least a part of the paper web protruding outward from the slot, and a motor for advancing the advancing device or the device. A connecting device for selectively connecting to any one of the cutting devices, and a control circuit for driving the motor, and when the motor is connected to the advancing device, the motor causes the paper web to The slot can be advanced through the slot, while the motor is adapted to actuate the cutting device to cut the paper web when the motor is connected to the cutting device, and the control circuit is adapted to control the motor. Is proportional to the predetermined length of the paper web when connected to the advancing device Wherein the motor is driven for, then it is characterized in that the motor is adapted to drive the motor after being connected to the cutting device.

In a preferred embodiment of the present invention, the coupling device comprises a first one-way coupling device and a second one-way coupling device, the first coupling device contacting the shaft of the motor with the advancing device. , The driving device is driven only when the motor shaft is rotated in the first direction, and the second coupling device contacts the shaft of the motor with the cutting device, so that the motor shaft is in the first direction. The cutting device is adapted to be driven only when rotated in the opposite second direction.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the device 1 of the invention has a housing or case 1a for containing the main components, which case is closed by a lid 2 connected to the case by a hinge 9. The case and lid are preferably molded from a plastic material. The central portion 3 of the lid 2 is transparent and partially curved so that the paper supply roll 8 can be installed in the case. Through this transparent portion 3, the remaining amount of paper can be checked. The lid further includes a key lock 48 or the like that engages with the case to prevent tampering with the lid and to cooperate with a notch 46 in the front (lower) portion of the case. It has a notch 47 so as to form the exit slot of the paper web.

Since this device is preferably mounted vertically, e.g. against a wall, the case and lid are further connected by a set of articulated bars 4 for changing paper rolls or for cutting paper webs as described below. When adjusting the length, the lid can be kept lifted. When the lid is closed, the nail 44 protruding from the inner surface of the lid actuates the safety switch 50 in the case so that the device power is turned off when the lid is lifted.

The case 1a has a bottom wall 10, two side walls 11 and 12, a front wall 13 and a rear wall 14. The bottom wall 10 has means (not shown) for attaching the device to the wall. Set of brackets 15
Stands on the bottom wall 10 and holds a roll 8 of continuous paper web 5.

The rest of the case 1a is divided into three compartments, one central compartment 71 and two lateral compartments 72, 73 (Fig. 2). The central compartment 71 is formed by a bottom wall 10, two rising side metal plates 51, 52 and a partially curved top plate 60, on which the paper web 5 unwound from the roll 8 in the exit direction is placed on top. Supported on board 60. As will be described later, the frame 55 supporting the paper drive mechanism, the control circuit board 39 (Fig. 7) and all other parts is formed by the plates 51, 52 and 60, and the frame 55 is the bottom wall. It is detachable from 10, and can be hooked on the bottom wall by elastic pawls 24, 57 formed on the bottom wall.

A hangable plate 30 is pivotally connected to the side plates 51, 52 and forms a passage for the web 5. The idle shaft 33 is this plate
It is pivotally mounted on 30 and has a plurality of rolls 35. The plate 30 further has an opening 41 corresponding to a similar hole 59 formed in the support plate 60, and is connected to a switch 49 (FIG. 8) for detecting the consumption of the paper web, which will be described later. A convex end 40 projects through the opening 41.
In use, plate 30 is plate 60 (both are preferably metal plates)
Since it is placed in the vicinity of the
While 40 (Fig. 7) keeps pressed down,
Keep the associated switch 49 closed. When the paper web 5 is exhausted, the raised end 40 is pushed upwards and the associated switch 49 is opened, rendering the device unusable.
In either state, the light indicator 36 or 37 placed at the top of the lateral compartment 73 shown in the right portion of FIGS.
Displayed on the outside of the dispenser (typically by an LED device). Both indicators are visible from the outside through a set of small holes (not shown) in the lid.

The compartment 73 on the right side is formed by the bottom wall 10, the side wall 12, and the side plate 52, and accommodates one block 45. This block 45
Has a lateral recess 58, the two light indicators 36 and 37 described above, and a hole 43, into which a nail 44 fits when the lid 2 is closed and the tab 42 is pushed down. The switch 50 connected to the device power supply is closed. Photoelectric devices 53 and 54 for starting the dispensing of the paper are provided in the recess 58 so that the user can start the device only by inserting one finger into the recess 58 without touching the wall of the recess. The shape of the lid 2 is designed. As shown in FIG. 2, the recess 58 contains a set of linearly arranged cooperating elements, for example a light source LED 53 and a photodetector phototransistor 54. The phototransistor 54 is connected to a circuit for initiating the dispense cycle so that the light from the LED will initiate the dispense cycle when it does not reach the phototransistor. Of course, other optical devices or peripheral devices can be used in addition to this.

The left compartment 72 is formed by the bottom wall 10, the side walls 11 and the side plates 51 and houses drive gears (82 to 122 in FIG. 3) for advancing and cutting the paper web 5 as described below. As shown in FIG. 2, an inner housing 16 is formed adjacent the rear wall 14 to cover a transformer (not shown). However, this housing 16 is not necessary if the transformer is to be placed outside the device, for example in order to meet the safety point of view that only a low voltage is passed in the dispenser.

A pair of brackets 15 (only one of which is shown in FIG. 1) for holding the paper roll 8 are mounted symmetrically and slidably on rails 28 mounted on the bottom wall 10 and arranged at the bottom. The compression spring 78 in the housing 29 elastically presses against a stop member (not shown) in the respective directions. A suitable plug on the upper edge of bracket 15
17 is attached and is adapted to engage a paper roll 8 which may or may not have a core. The adjustable distance between a pair of brackets allows different width rolls to be mounted on the device, while at the same time self-centering in any case due to the symmetrical, sliding and elastic pressure mounting described above. The arrangement can be maintained.

Installation of the paper roll 8 in the dispenser is facilitated by further pulling the brackets 15 away from each other (ie pushing the protruding tabs 19 laterally), positioning the roll between the plugs 17 and then releasing the brackets. Can be done

Forwarding, cutting and control equipment are all plates 60, 51 and 5
It is attached to a metal frame 55 formed by 2. These latter members have means for engaging the bottom wall 10, such as metal blades (not shown), which are movable in slots provided in the bottom wall. Two tabs 57 are formed in the bottom wall 10 by notches 59 extending along three C-shaped directions.
The ends of these tabs are wedge-shaped protrusions that slope toward the bottom.
Abut the high part of 24. When the frame 55 is placed in the case, these tabs 57 are elastically biased outward and abut the frame 55 to hold it securely. By pushing down these tabs and pushing the frame 55 toward the bracket 15, the frame 55 can be unlocked and removed for maintenance, for example.

The plate 60 is provided with a tiltable door 25 (FIG. 7) for operating the control circuit board 39, in particular a set of microswitches M for adjusting the length of the paper web to be dispensed. .

The paper web 5 unwound from the roll 8 is initially on the plate 60 and is then guided between the plates 60 and 30. Board
30 has a pair of side arms 34 (only one of which is shown), which is pivotally attached to plates 51, 52 by pins 27. Thus, the plate 30 can be lifted upwards when inserting the paper web 5. In addition, the plate 30 has a longitudinally extending rising portion 38 which abuts the lid 2 to keep the plate 30 stationary during operation of the device. The plate 30 further supports a plurality of rolls 35 mounted on a common idle shaft 33 connected to the plate 30. Some of these rolls 35 project from the plate 30 through the openings 32 and come into contact with the plurality of rollers 63 mounted on the frame 55. These rollers 63 are the drive or feed rollers for the paper web, and the shaft 120 in the central compartment 71.
Is held by As shown in FIG. 7, the shaft 12
0 is supported between the plates 51 and 52, and is arranged at a position where a part of the plate 60 projects from the plate 60 through an elongated opening 61 provided in the plate 60. The surface of the roller 63 is adapted to frictionally engage the paper web, eg the roller is covered with rubber.

When the paper web 5 is not sandwiched, the roller 63 and the roll 35 are in contact with each other with a certain pressure. Thus, if the paper web 5 is clamped between the plates 60 and 30, the paper web 5 is pressed between the plates 60 and 30 when the plate 30 is in its operative position.

As can be seen in FIGS. 2 and 6, a cutting device 85 is provided at the exit where the paper web 5 emerges from the gap between the plates 60 and 30. This cutting device has a fixed blade 31 and a movable blade 56 mounted between the plates 51 and 52. Blades 31 and 56
Have sharp edges and are preferably made of steel.
Paper web length that can be grasped from outside the dispenser 6
Still supported by plate 60, fixed blade 31 and movable blade 56
It is advanced to the required length between and by the movement of the movable blade 56 in a manner similar to scissors as described below.

3 and 4 show configurations for advancing and cutting the paper web 5. FIG. 3 shows III-III of FIG.
FIG. 4 is a line sectional view showing a plurality of gear devices arranged on a plate 51, and FIG. 4 shows a front view of the gear device.

The shaft 80 of the DC motor 64 housed in the central compartment 71 is a plate
Pinion 82 that penetrates 51 and engages the external teeth of the first gear 88
Holding The inner teeth 86 of this gear 88 engage with the outer teeth of the second gear 94, and the inner teeth 92 of the gear 94 drive the third gear 102 which is linked to the pin 100. The first gear 88 to the third gear 102 form a reduction gear between the motor 64 and the two pinions 112,122. For the sake of clarity, in FIG. 4 the pinions 112 and 122 are shown separated from each other in the longitudinal direction, but as can be seen from FIG.
102 meshes with both of these pinions. Apart from the pininon 82, all gears are preferably made of nylon or other plastic material.

Pinions 112 and 122 are one-way clutches 115 and 1 respectively.
It is connected to the shafts 110 and 120 via 16. Each of these pinions is free to rotate in both directions with respect to the plate 51 on which they are supported. Clutch 115
The pinion 112 is coupled to the shaft 110 only when the pinion 112 rotates counterclockwise as viewed in FIG. 3, and the shaft 110 is not driven when the pinion rotates clockwise. Further, the cam 130 with the pin 132 is
The cam 130 rotates only when the shaft rotates.

On the other hand, the clutch 116 engages the pinion 122 with the shaft 120 only when the pinion 122 rotates clockwise in FIG. 3, and is disengaged from the shaft 120 while rotating in the opposite direction. The two one-way clutches 115 and 116 can be constructed simply and at low cost by using a spring 109 of so-called pinching type or throttling type as shown in FIG. 4, for example. This spring 109 has a coil that is wound around a hub 113 that is coaxial with and integral with the shaft 110, and another coil that is wound around a hub 114 that is coaxial with and integral with the shaft 120 in the opposite direction. . One end of the spring 109 is fixed to the case 1a and the other end is free. by this,
When the rotation of the two pinions (always in the same direction) causes the coil of one of the two hubs to tighten, it causes it to rotate with the associated shaft, while being wound in the opposite direction. The coil loosens around its associated unengaged hub, thus leaving the corresponding shaft stationary. Of course, other types of known one-way clutches can be used.

In FIG. 3, the arrow indicates the rotation of the gear, and the pinion
122 rotates clockwise, so roller 1 along with shaft 1
Drive 20 to advance the paper web. However, although the pinion 112 rotates in the direction of the arrow, the shaft 112 also has a cam 130.
Also does not drive. On the other hand, when these rotations are opposite, the advance of the paper is stopped and the shaft 110 rotates. This shaft 110 drives a cam 130 and also an eccentric cam 139 having a pin 136 on the opposite side. This eccentric cam is a cutting device 8 to be described later.
It is for activating 5.

The construction of the cutting device 85 is shown in FIGS. 3, 4, 5, and 6. The fixed blade 31 has a plate 51 at one end and a plate at the other end.
The movable blade 56 is fixed to the fixed blade 52 (FIG. 6), while the movable blade 56 allows a limited rotation with respect to the fixed blade 142.
It is held by the shaft 140 via (for example, nylon). The edges of blade 56 are not parallel to blade 31 as shown in FIG. 4 to provide a gradual cutting action. Also the blade
Since the edge of 56 is interrupted by the recess 145 in the middle,
The center of the paper web is not cut even after the cutting process is completed.

The reciprocating motion of the blade 56 consists of a left side section 72 and a right side section 73.
By levers 131 and 135 respectively located therein. The levers 131 and 135 have the same shape and are mounted in parallel within the frame. One end of each lever 131 and 135 (127 in FIG. 4 and 128 in FIG. 6, respectively) has a corresponding plate (5
1,52) and the other ends (125 in FIG. 4 and 126 in FIG. 6, respectively) are connected to each other by a shaft 140 extending transversely to the frame and supporting the blade 56. The upper edges 133,134 of the blade 56 are further provided with a second for smooth movement.
It is connected to the plates 51, 52 by elastic means such as a spring 96 as shown in FIGS.

At the center of each lever 131,135, the corresponding cam 130,139
Slots 137,138 that accommodate pins 132,136 mounted in
(FIGS. 4 and 6). As described above, the cams 130 and 139 are fixed to both ends of the shaft 110, and the shaft 110 is further connected to the pinion 112 by the one-way clutch 115. One complete counterclockwise rotation of the pinion 112 causes the blade 56 to move, as clearly shown in FIG.
The reciprocating motion of is triggered once. In FIG. 6, the upper position of the lever 135 and the blade 56 is indicated by the dotted line. Further, in FIG. 6, the lid 2 partially lifted and the plate 30 completely lifted to the outside are shown.
And are indicated by dotted lines.

A device for measuring the length of the dispensed paper web is provided in the right-hand compartment 73, which is of a conventional type (see FIG. 7) and will be described briefly. This measuring device consists of a disc 65 mounted on a shaft 120, on which a large number (for example four) of circumferential notches 66 are provided.
have. Optical type detectors 68, 69 detect the passage of each notch 66 during forward rotation of the shaft 120 and transmit a number of pulses to the control circuit 20 that are proportional to the length of the dispensed web 6.

A block diagram of the electrical control circuit 20 of the device of the present invention is shown in FIG. The terminals of the DC motor 64 are connected to the outputs 21, 22 of the drive circuit 23 controlled by the logic unit 26. DC voltage equal to both outputs 21,22 (eg 1
2V), the motor 64 remains stationary. When one of the outputs, eg 21, is at a near zero voltage, a voltage difference is applied to the motor terminals, driving the motor in one direction. In the reverse of the above, the motor 64 is driven in the opposite direction. Typically output 21,2
2 is connected to the collectors of two power transistors (not shown). By driving one of these to saturation, its collector allows the motor to rotate at a predetermined voltage level, for example a few tenths of a volt. The logic unit 26 receives the start pulse from the photoelectric devices 53 and 54 and starts the rotation of the motor 64 in the dispensing direction. This rotation is detected by the measuring device consisting of the disc 65 and the notch 66 and the photoelectric detectors 68, 69. In this way, a number of pulses is provided to the logic unit 26 which is proportional to the rotation of the roller 63 (ie the length of the dispensed paper). These pulses are accumulated and their sequence is compared with a preselected sequence set by switch M. Upon receiving a pulse equal to the preselected number of pulses, the motor 64 will stop and its rotation will be reversed for a predetermined time to complete rotation of the pinion 112,
That is, cutting of the web is achieved. The protection circuit 76 deactivates the drive circuit 23 when the switch 49 is opened (paper consumption), and further controls the optical indicators 36 and 37. The DC power supply 77 supplies current to all circuits, and cuts off the supply when the lid 2 is opened.

The operation of the above-described dispensing device of the present invention will be described below. Mount this device vertically on a wall, etc., and connect the power supply of this device to the mains power supply. This causes the light indicators 36, 37 to indicate the operating status of the device. If the paper roll 8 is exhausted (or the paper web has not been introduced between the plates 60 and 30), the light indicator 36 will indicate a disabled condition.

To introduce a new paper roll 8, the user opens the lid 2 with a suitable key and raises the lid until the articulation bar 4 is activated and remains open. When the lid 2 is lifted, the engagement between the nail 44 and the tab 42 is released and the switch 50 is opened, so that the power is turned off during the roll introducing operation.
When the paper roll 8 is attached, it is automatically centered between the brackets 15 and then the plate 30 is tilted forward to properly position the paper web 5 on the roller 63. Next, the plate 30 is returned to its original position, and the lid 2 is closed. The paper web 5 is pressed between the roller 63 and the roll 35 by means of the closed lid 2 pressing against the rising portion 38 of the plate 30. At this time, the roll 35 may be slightly displaced against the action of the spring means (not shown) to which the shaft 33 of the idle roll is attached. Paper web 5 is also switch 49
In order to push down the convex end 40 of the, the unusable indicator 37 is turned off when the lid 2 is closed and the paper web 5 is correctly placed.

If it is desired to change the length of the paper towel, the user must set the door 5 before introducing the web 5 between the plates 60 and 30.
Open 25 to set various arrays of microswitches M on control circuit board 39. These switches (eg 4)
Indicates how much of the basic length of the web should be dispensed before cutting the paper web 5. For example, when all the switches are set, the maximum length of paper is dispensed. Further, when only the first switch is turned on and all the remaining switches are turned off, the length of the paper web to be dispensed becomes half the maximum, and various settings are made according to the binary arithmetic method. For example, the basic length chosen for this device can be of the order of 2 cm, and corresponding to the binary array of switches 1111, the maximum dispensed length of each cycle is this basic length. It could be 15 times that. A table showing the correspondence between towel lengths and switch arrangements may be attached to plate 60.

When the user inserts his finger into the recess 58, it blocks the light beam between the LED 53 and the phototransistor 54, which initiates the dispense cycle. By providing a known circuit configuration, it is possible to prevent further starting action of the device over a period of time. Control circuit 20
Drives the motor 64 in such a direction as to rotate the roller 63 to advance the paper web 5 from the dispenser device. Shaft 120 holding roller 63 to drive
The rotation of is monitored by this control circuit. The control circuit compares the number of pulses received from the photoelectric detectors 68, 69 with a predetermined number derived from switch M. When a match of these two numbers is detected, the motor 64 is stopped and driven in the opposite direction for full rotation of the pinion 112.
In this way, the blade 56 makes one reciprocating movement, cutting the protruding web 5 almost completely and returning to the initial position.
Since the narrow portion of the center of the paper web remains uncut due to the recesses in the blade 56, the towel 6 remains suspended below the dispenser and can be easily pulled apart by the user. After cutting, the device is ready to start another new dispensing cycle.

9 and 10 show another embodiment of the paper towel dispensing device according to the present invention, which device is generally designated by the reference numeral 1 '. This device 1'is generally similar to the device 1 shown in FIGS.
Therefore, the same members have the same reference numerals.

This device 1'is powered by a battery and has a battery holder (not shown) housed in an inner housing 16 formed near the rear wall 14. For example, nine 1.5 V batteries can be used. The battery holder has suitable connectors for powering the components of the device 1 '. Preferably, this inner housing 16 may only be opened from the inside of the device 1 ', so that it cannot be tampered with by anyone but a specific person.

A further modification of this device 1'to the device 1 is the elimination of the optical device. Since such optical devices need to emit light continuously, elimination of this can minimize battery consumption.

To this end, the micro-switch assembly 53 'and the lateral block in which the light indicators 36, 37 in FIG. 1 are eliminated and the optoelectronic devices 53, 54 are mounted on the underside of the lid 2
The contacts 36a and 37a mounted in 45 'are replaced. Block 4
5'corresponds to the block 45 in the device 1, but has a set of recesses 58 'in which the contacts 36a are located.
And 37a are installed. As shown in Figure 12, the microswitch assembly 53 'is
53a, a mounting plate 170 to which the micro switch 53a is mounted, and a screw 54 for fixing the plate 170 to the lower pillar 172 of the lid 2.
have. Instead of the optical detection devices 53, 54 (Fig. 8) in the device 1 (Fig. 1), a microswitch 53a provides an input to the logic unit 26 (Fig. 16).

As can be seen in FIG. 12, the block 45 'is provided with two contacts 36a, 37a, which connect the terminals of the microswitch 53a when the lid 2 of the device 1'is closed. Initiate the operating cycle of the device. When the microswitch is activated, contacts 36a and 37a are passed through plate 170.
Connect to each other and activate the logic circuit 26, which activates the motor 64.

The starting microswitch 53a is fastened to the underside of the lid 2 by means of a screw 54 which, in addition to fastening the mounting plate 170 to which the microswitch is attached, when the lid 2 is closed, the contacts 36a of the block 45a, Contact 37a. The plate 170 can have, for example, a conductive portion so as to have conductivity with the screw 54, and is interconnected by the microswitch 53a when the microswitch 53a is activated. The operation of the micro switch 53a is performed by the elastic film 171 provided on the upper surface of the lid 2 without directly touching it. Only slight pressure needs to be applied on the elastic membrane to initiate the actuation cycle. Of course, other control devices can be used in place of the microswitches described above, but it is desirable to avoid optical devices that require continuous light emission to minimize battery consumption.

Another feature of the present invention is that the device 1 ′ has a lid 2
It is provided with an improved safety device for turning off the power to the device 1'when the handle is lifted. As shown in FIG. 11, the lid 2 is provided with a nail 44 similar to the device 1 of FIG. 1, but the nail 44 has a protruding tab as in the device 1 of FIG. Switch by simply depressing 42
It does not activate 50. In the device 1'of FIG. 11, when the lid 2 is closed, the nail 44 is pierced through the opening 43 provided in the right compartment of the device and the lever 150 is pushed down. In this lever 150, an arm 152a pivots around a pivot 154, and with this, the arm 152b rotates against the force of a spring 153. The spring 153 is connected between the free end of the arm 152b and the paddle 151 of the transmission element 152. element
When 152 is depressed, it closes the switch 50 'which is connected to the power supply of the device.

In the device 1 ', the bracket 15' for holding the paper roll 8 is schematically shown in Figs.
Further details are shown in the figures. Ie bracket 1
5'is represented as a self-centering type which is symmetrical and slidable under the action of a spring 78. The self-centering characteristic of bracket 15 'is provided by idle gear 155. This gear 155 is a rack type tooth profile fixed to the bracket or formed on the bracket itself.
156 connect the two brackets 15 'to each other. Therefore, moving one of the two brackets out of the equilibrium position provided by spring 78
155 rotates a certain number of teeth, which causes another bracket 15 'to move in the opposite direction by the same number of teeth. Thus, the two brackets always move symmetrically with respect to the central axis passing through the rotation axis of the gear 155. Such a self-centering bracket can also be used in an electric paper towel dispensing device such as the device 1 of FIG.

The device 1'also employs a modified one way spring type control for actuation of shafts 110 and 120 which control the paper cutting mechanism and the paper advancing mechanism. Such a deformation control mode can also be used in the device 1 of FIG. Referring to FIG. 14, both pinions 112 'and 122' are shown in FIG.
Driven by a power shaft 80 (Fig. 3) via a gear transmission such as
22 'is connected to shafts 110 and 120 via opposite unidirectional couplings 160' and 161 ', respectively. Both of these pinions are free to rotate in either direction relative to the plate 51 to which they are attached. Coupling
160 'couples the pinion 112' with the shaft 110 only when the pinion 112 'rotates in a predetermined first direction, and does not drive the shaft 110 when the pinion rotates in the opposite direction.

Coupling 161 'is provided only when pinion 122' rotates in a direction opposite to the first direction.
2'is connected to the shaft 120 and is disengaged from the shaft 120 when the pinion rotates in the opposite direction. In the present invention, these two unidirectional couplings 160 '
And 161 'are constructed as shown in FIG. 14, and are simple and inexpensive, but extremely reliable.
For this purpose, only two springs 162 'and 163', so-called pinching or throttling, are used. Spring 162 'is wound in opposite direction on hub 113' which is coaxial and integral with shaft 110, while spring 163 'is wound on hub 114' which is coaxial and integral with shaft 120. One end of each spring 162 ′, 163 ′ has a corresponding pinion 11
They are fixed to 2'and 122 'respectively, but the other end is free, so the rotation of these two pinions (always rotating in the same direction) is tightened on the coil wound on one of the two hubs. In that case, the hub is driven to rotate with the corresponding shaft. On the other hand, the coil of the other coupling wound in the opposite direction will loosen around its associated hub, leaving the corresponding shaft stationary.

A reversing device is provided to effectively ensure that the shaft, which may not be rotated, remains stationary. This device includes a second hub which is coaxial and integral with the first hub 113 'of the shaft 110.
Another hub that is formed by a pinching type double coil 109 'that is wound around a portion of a coil 115' around a hub 113'a of the shaft of FIG.
It has a second portion of coil 116 'wrapped around 114'a. Due to the above parts 115 ′ and 116 ′, the spring
109 'blocks one or the other of the hubs and prevents accidental recoil of either associated shaft that is freed by the associated spring 162' or 163 '.

The cutting device 85 'of the device 1'shown in FIG. 15 is provided on the cam 130 fixed to one end of the shaft 110, similarly to the cutting device 85 (FIG. 5) for the device 1 shown in FIG. He pin 132
Are actuated by moving in the slot of lever 131. At the other end of the shaft 110, a similar device (for example, a cam 139 with a pin 136 shown in FIG. 6) ensures the correct operation of the cutting device 85 'consisting of a fixed blade and a movable blade. Referring to FIGS. 15 and 16, paddle 165 is secured to lever 131 by screw 166 (another paddle secured to lever 135 is similarly mounted on the opposite side of the device). ), On the other hand, the lever
A small shaft 127, to which 131 is pivoted, is pivotally mounted and slides in a slot 164 formed in paddle 165 to paddle 16
You can move with respect to 5. At the end of the paper web cutting process, the photoelectric sensor 167, which is connected to the logic unit 26 in parallel with the photoelectric detectors 68 and 69, is paddle 165.
The pinion 112 'continues to rotate until its motion (represented by the dotted line in Figure 15) is obscured and the motor is stopped. The operation of the logic unit 26 is performed by the micro switch 53a.
It should be noted that it is done by closing and. Also note that if the paper roll 8 is exhausted (or the paper web is not properly inserted between the plates 60 and 30 of FIG. 9) the cycle will not begin. Should be. When the paper web 5 is correctly inserted, this web depresses the tab (indicated by 40 in FIG. 7) associated with the switch 49 of FIG. 16 and the lid 2 is closed to provide the contacts 36a. If 37a is preset and switch 50 is closed, microswitch 53a
Through the operation of the operating cycle.

As in device 1 (FIG. 1), paper web 5
Before introducing the board between the plates 30 and 60, the user presets the combination of the microswitches M on the circuit board 39 (FIG. 7) to determine the basics of the web to be dispensed before the paper web is cut. The number of lengths can be programmed and one dispense cycle is initiated by actuating microswitch 53a.

Those skilled in the art can add and / or change the embodiment of the present invention described above within the scope of the claims of the present invention, and the present invention is not limited to the above-mentioned embodiment. Absent.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the dispensing device in an open state; FIG. 2 is a plan view of the device of FIG. 1 with a lid removed; and FIG. 3 is a line III-III of FIG. Is a sectional view along
FIG. 4 is a view showing a drive gear of the apparatus; FIG. 4 is a partial front view showing the drive gear; FIG. 5 is an explanatory view showing a cutting blade of paper; FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is a perspective view showing the operation of the cutting device; FIG. 7 is a perspective view showing a plate for supporting the paper web before the paper web leaves the device; FIG. 8 is a block diagram of the control circuit of the device;
FIG. 9 is a perspective view showing a second embodiment of the dispensing device of the present invention in an open state; FIG. 10 is a plan view of the device of FIG. 9 with a lid removed; and FIG. 11 for opening and closing the lid. A cutaway view showing the details of the safety switch of this device with it; FIG. 12 is a cutaway view illustrating the push button control device for battery operation of this device; FIG. 13 is an explanation of the self-centering paper roll bracket of this device FIG. 14 is a unidirectional coupling of the paper advancing and cutting bar drive mechanism of this device.
FIG. 15 is an exploded view showing the assembly; FIG. 15 is a cutaway view showing the cutting device mechanism of this device; and FIG. 16 is a block diagram of the control circuit of the device shown in FIG. 1 ... Dispensing device, 1a ... Housing (case), 2 ...
… Lid, 5… Paper web, 6… Small web, 8… Paper roll, 15… Bracket, 20…
Control circuit, 23 ... Driving circuit, 26 ... Logic unit, 31 ...
… Fixed blade, 33 …… axis, 35 …… roll, 46,47 …… notch, 49 …… switch, 50 …… safety switch, 53 …… light source, 54 …… photodetector, 56 …… movable blade, 63 …… Roller,
64 …… Motor, 76 …… Protection circuit, 77 …… DC power supply, 82
...... Pinion, 85 …… Cutting device, 88,89,102 …… Gear, 1
09 …… Spring, 110 …… Axis, 112 …… Pinion, 113,114…
… Hub, 115, 116 …… One-way clutch, 120 …… Shaft, 122
...... Pinion, 130 ...... Cam, 131,135 ...... Lever, 139
...... Cam, 145 ... Recess, M ... Micro switch.

Claims (18)

[Claims] 1. A housing (1,2) with a slot (46,47) through which a paper web (5) unwound from a paper roll (8) is led out to the outside and rotating in two directions. Electric motor (64) and a device (33,35,63) for advancing the paper web through the slot
A device (85) for transversely cutting at least a part of the paper web projecting outwardly from the slot, and a connection for selectively connecting the motor to either the advancing device or the cutting device. Equipment (110,112,
115; 120,122,116) and a control circuit (20) for driving the motor, the motor being capable of advancing the paper web through the slot when the motor is connected with an advancing device, When the motor is connected to the cutting device, the motor is adapted to actuate the cutting device to cut the paper web, and the control circuit controls when the motor is connected to the advancing device. And driving the motor for a time proportional to a predetermined length of the paper web, and then driving the motor after the motor is connected to the cutting device. A device for dispensing a specified length of paper web from a paper roll. 2. The connecting device is a first one-way connecting device (12).
0,122,116) and a second one-way coupling device (110,112,115), the first coupling device contacts the shaft of the motor with the advancing device and advances only when the motor shaft is rotated in the first direction. And driving the device so that the second coupling device brings the shaft of the motor into contact with the cutting device so that the cutting device operates only when the motor shaft is rotated in a second direction opposite to the first direction. The dispensing device according to claim 1, wherein the dispensing device is driven. 3. The advance device includes a shaft (120) and the shaft (120).
Consisting of a plurality of rollers (63) mounted on the and corresponding idle rollers (35), each roll facing one of said rollers, the paper web being between these rollers and a roll. The cutting device (85) is pressed, and the cutting device (85) has a fixed blade (31), a movable blade (56) and a lever (131, 13).
5) and a rotatable cam (130, 139), both sides of the movable blade are held by one end of the lever, and the other end of the lever is pivotally connected to the housing. The dispensing device according to claim 1, wherein is engaged with said lever to impart a reciprocating motion to said lever. 4. One common gear (8) rotatable in two directions.
8) has a transmission gear (82) for connecting the motor,
The gear (88) meshes simultaneously with the first pinion (122) and the second pinion (112), and the first one-way coupling device includes the first pinion and the roller attached to the shaft. A first clutch (116) disposed between the first pinion and the roller when the first pinion is rotating in the first direction. And a second clutch (1) disposed between the second pinion and a cam (139, 130) for actuating the disconnecting device.
15), the second clutch connecting the second pinion to the cam only when the second pinion is rotating in a second direction opposite to the first direction. The dispensing device according to claim 2. 5. The one-way clutch comprises a spring (109), one end of which is fixed to the housing (1) and the other end of which is free, and the spring has a shaft (12) of the roller.
0) with one coil wound around a hub (114) and one coil wound in the opposite direction around another hub (113) integral with the cam. As a result, when the second pinion rotates in one direction, loosening of the coil wound on the one hub and tightening of the coil wound on the other hub occur, and the two pinions The dispensing device according to claim 4, wherein the opposite phenomenon occurs when the rotation is changed. 6. The advancing device and the cutting device respectively include a first shaft (120), a second shaft (110) and a first pinion (12).
2) and a second pinion (112), the coupling device being a first one-way coupling device (161 ') disposed between the first shaft and the first pinion and the first pinion (161'). A second one-way coupling device (16) disposed between the second shaft and the second pinion.
0 '), each said one-way coupling device being wound around a hub (113', 114 ') fixed to said associated shaft and having one end free and the other fixed to each said pinion. Has a spring, so that rotation of the two pinions in a certain direction loosens the coil wound on the one hub to free it and tightens the coil wound on the other hub. A device (10) for rotating the lever hub and each of the one-way coupling devices stopping an unrotated shaft.
9 '), the device (109') being partially wound around one of two other hubs (113a, 114a) coaxially fixed to the axes associated with said two hubs. The dispensing device according to claim 1, further comprising a partially wound spring. 7. An edge of the movable blade (56) extends at an angle toward the fixed blade (31) and a central recess (145).
5. The dispensing device according to claim 4, wherein the narrow central part of the paper web remains uncut after the complete reciprocating movement of the movable blade. 8. A light source (5) having a device (53,54) for initiating a dispensing cycle, said initiating device being spaced apart from each other in a recess (58) formed on the outside of said housing.
The dispensing device according to claim 1, which comprises 3) and a photodetector (54), and is capable of detecting the presence or absence of an object between the light source and the photodetector. 9. A switch device (53 ') operable by the control circuit (20) to initiate a dispensing cycle.
The switch device includes a contact (36a, 37a) circuit-connected to the control circuit, and a microswitch (53a).
A plate (170) for mounting the microswitch in the housing, and an elastic film (171) for facilitating manual operation of the microswitch,
The housing comprises a lid (2) having a through hole, the microswitch is arranged in the vicinity of the through hole, and the elastic film is fixed to the through hole of the lid. The dispensing device according to item 1. 10. A microswitch is mounted on the mounting plate (170) so that the microswitch is arranged under the lid of the housing, and the lid can be opened and closed together with the microswitch. 10. The dispensing device according to claim 9, wherein the mounting plate comprises a device (54) for electrically connecting the microswitch to the contacts when the lid is closed. 11. The dispensing device according to claim 1, wherein the electric power source of the electric motor (64) is a battery. 12. A safety switch (50) circuit-connected to the power source is provided in the housing, and the lid (2) has a protrusion (44) on the back side thereof and extending into the housing.
And a coupling device for activating the safety switch when the lid is closed and coupling the projection with the safety switch to connect at least the control circuit to a power source only when the lid is closed. (150,152), the coupling device includes a transmission member (152), a pivot member (154) pivotally mounting the transmission member in a housing, and the transmission member so as to be disengaged from the safety switch. A biasing spring (153) for moving the transmission member to engage the safety switch against the bias of the spring by the projection (44) when the lid is closed. Dispensing device according to claim 2. 13. The cutting device (85) includes a fixed blade (31),
Movable blade (56) and lever (131,135) pivotally attached to the housing and supporting the movable blade and both ends thereof.
And an optical sensor (167) circuit-connected to the control circuit, the movable blade having a cam (130, 139) engaging the lever, whereby the lever reciprocates to the movable blade. A rotatable paddle (16) arranged to impart movement and actuate in association with the optical sensor.
5. The dispensing device according to claim 1, further comprising 5) whereby the optical sensor generates a signal indicating the end of the dispensing cycle after the cutting device has been actuated to cut the web. 14. The frame (55) comprises two parallel plates (51, 52) perpendicular to the bottom wall of the housing, and a partially curved support plate (60) connected to the parallel plates. An additional plate (30) having a supporting plate and pivotally mounted on the parallel plate.
3. An arrangement according to claim 2, wherein the paper web to be dispensed passes between the support plate and the additional plate so that the paper web to be dispensed is swingably moved with respect to the support plate. The described dispensing device. 15. A safety switch having an elastic convex end (40) extending through an opening (59) of the support plate (60) corresponding to the opening (41) of the additional plate (30) and engaging with a paper web. (49) so that when there is no paper web (5) between the support plate (60) and the additional plate (30), the switch (49) is opened by the convex end (40). The dispensing device according to claim 14, wherein 16. A set of brackets (1) slidably attached to the bottom wall (10) of the housing.
5. The dispenser according to claim 1, wherein the bracket is supported by 5), and the brackets are continuously pressed by the elastic member (78) toward each other so as to center the rolls of paper rolls having different widths. apparatus. 17. A set of brackets (151) for supporting a paper roll in the housing, each bracket engaging simultaneously both a rack tooth portion (156) and the rack tooth portion. Idling pinion member (15
5. The dispensing device according to claim 1, further comprising: 5), whereby each of these brackets always moves symmetrically with respect to a central axis passing through the rotation axis of the idle pinion member. 18. The control circuit (20), wherein the electric motor (64) capable of rotating in two directions is a DC electric motor.
Is a drive circuit for supplying a reversible voltage difference to the motor (23)
The control circuit (20) further comprises a circuit (2) for comparing the number represented by the preselected binary arithmetic array with the number of pulses generated at a constant rate during the advance of the paper web.
The dispensing device according to claim 2 having 6).