JPH01244727A - Paper towel distributing machine - Google Patents

Abstract

PURPOSE:To linearly guide a paper towel and to prevent the generation of meandoring by arranging a drawing roller and a feeding roller in facing them forward and backward, stringing a belt between the circumferential surfaces of both rollers, and simultaneously, causing the widths of both rollers to be remarkably smaller than the width of the paper towel. CONSTITUTION:In the upper edge parts of right and left side plates 21 and 21, shafts 45 and 46 are rotatably shaft-supported, respectively. In the central parts of the shafts 45 and 46, a feeding roller 47 and a drawing roller 48 of the same diameter are fixed in being faced, opposingly and a belt 49 of the same width as the widths of the rollers 47 and 48 are strung between the outer circumferences of the rollers 47 and 48. The widths of the rollers 47 and 48 are made remarkably narrower than the width of a paper towel P and, simultaneously, located in the central part in the width direction of the paper towel P. For such reason, friction force is applied only to the central part of the paper towel, and the paper towel is drawn out. Consequently, since the paper towel is drawn out while the force is centralized only at one pint, the paper towel P can be fed without meandoring.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper towel dispensing machine, and more specifically, it simplifies the power transmission means of a roller that feeds paper towels and prevents meandering during paper towel feeding. The present invention relates to a paper towel dispensing machine that can prevent

[Conventional technology] Various paper towel dispensing machines are known in the art.

This type of paper towel dispensing machine winds a paper towel of a predetermined width, perforated at predetermined intervals, into a roll, stores it in the device, and guides the tip of the rolled paper towel along a predetermined path. It is so that it can be cut.

In a paper towel dispensing machine that uses such paper towels, if the paper towels are not guided properly,
Accurate cutting is not possible.

Therefore, paper towel dispensing machines having various paper towel introduction paths have been proposed.

These paper towel dispensing machines are equipped with a paper towel feed roller and a pull-out feed roller, and are structured to guide the rolled paper towel along a predetermined path to the usage position, allowing each to perform its functions. Was.

[Problems to be Solved by the Invention] However, in the above-mentioned paper towel dispensing machine, the paper towel is fed by several rollers, so it is necessary to make these rollers interlock. The problem was that it required a power transmission means such as a chain or gear mechanism, making the structure complicated.

Additionally, because conventional paper towel feeding rollers have a length equal to or longer than the width of the paper towel, there is a problem in that a uniform frictional force is not applied to the paper towel, causing the paper towel to meander. .

[Means for Solving the Problems 1] In order to solve the above-mentioned problems, the present invention provides a pull-out roller and a feed roller near the entrance of the paper towel feeding path and at the center in the width direction of the paper towel. A structure was adopted in which the rollers were placed facing each other in the front and back, a belt was stretched between the circumferential surfaces of both rollers, and the width of both rollers was significantly smaller than the width of the paper towel.

[Function] If the above-mentioned structure is adopted, if only one roller is rotated, the roller being used will be rotated via the belt.
Power can be transmitted without using a gear mechanism or the like.

In addition, the thickness of the roller on which the belt is stretched is significantly smaller than the width of the paper towel, so when feeding the paper towel, frictional force is applied only to one place in the center of the paper towel, so the force is applied uniformly and the paper towel can be guided in a straight line without meandering.

Further, the paper towel is fed along the upper side of a belt stretched along the running direction, and this belt can prevent the leading edge of the paper towel from falling down or being caught in the leading edge of the paper towel.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIGS. 1 to 12 illustrate one embodiment of the present invention, and FIGS. 1 and 2 are exploded perspective views of the main parts and the whole.

The paper towel dispensing machine according to the present invention is assembled with a base frame 1 as a reference.

The base frame 1 is formed from a metal plate as a quadrilateral frame body, and includes a pair of left and right side plates 2, 2, a bottom plate 3 that connects the front half between the lower ends of these, and a back plate that connects the rear edges. 4, and a top plate 5 that connects the upper ends of the side plates 2, 2.

In the vicinity of the lower part of the side plate 2.2 on the near side, projecting pieces 6 are cut and raised at right angles toward the inside.

The bottom plate 3 has a horizontal part 7 on the back side and an oblique side 8 facing upward on the front side, and a bent piece 7a is formed upwardly at a right angle on the rear edge of the horizontal part 7, and the oblique side 8 is also formed with a bent piece 8a at a right angle upward.

Further, a projecting piece 9 is provided on the upper surface of the oblique side 8 in parallel with the bent pieces 7a and 8a over the entire length. Projecting pieces 9a are provided at both ends of the projecting piece 9, and a 7-shaped notch 9b is formed at the center of the upper end of each projecting piece 9a.

Furthermore, protrusions 10 are vertically protruded on the upper surface of the oblique side 8 in front of the protrusion 9 and at both left and right ends,
A bent portion IQa is formed at the upper end of each projecting piece 10 horizontally toward the front side.

In addition, a quadrilateral notch 4a is provided at the center of the lower end of the back plate 4.
A bent piece 11.11 is formed on the lower edge of the back plate 4 horizontally toward the back side, sandwiching the notch 4a therebetween. The guide frame 12 is fixed using these bent pieces 11,11. The guide frame 12 is disposed toward the front and downward, and has a rearwardly curved portion 12a formed at its lower end. Further, at the upper portions of both the left and right ends of the back plate 4, elongated narrow portions 4b are provided at the upper end portions.
An opening 4C is formed.

On the other hand, the top plate 5 has a rectangular opening 5a formed in its center, and a transparent plate 5b is fixed to the lower surface of the top plate 5 so as to close this opening 5a. Therefore, this part serves as a viewing window for viewing the interior.

Furthermore, protrusions 14 are provided at both ends of the front side edge of the top plate 5 to protrude toward the vertical Th.

By the way, the back plate 4 of the base frame 1 is attached to the mounting plate 13.

The mounting plate 13 is formed as a quadrilateral dish-shaped frame, and bent pieces 15 and 16 are formed at right angles toward the front side at the top and bottom, and bent pieces 17 and 17 are formed at the left and right sides. ing.

At the center of the lower bent piece 16 is the notch 4 of the back plate 4.
A notch 16a is formed opposite to a.

In addition, protrusions 17a are formed toward the front side at the upper ends of the left and right bent pieces 17.17, and each protrusion 17a
A notch 17b is formed at the upper end to engage with the narrow portion 4b of the opening 4C of the back plate 4.

A keyhole-shaped 1ift opening 18 is located near the upper edge of the mounting plate 13.
is formed. Nails, screws, or the like fixed to a wall (not shown) are fitted into these openings 18.

In addition, in order to attach the base frame 1 to the mounting plate 13, the notch 17b at the upper end of the bending piece 11 and the opening 4C in the back plate 4 are removed.
The folding piece 11.11 may be placed on the folding piece 16 by fitting the folding piece 11.11 into the narrow portion 4b of the folding piece 16.

Note that the through hole 1 formed near the lower edge of the mounting plate 13
4a is for securely fixing the mounting plate 13 to the wall surface with nails or the like.

An intermediate frame 19 is accommodated within the base frame 1. The middle frame 19 is formed by press-molding a metal plate, and includes a back plate 20, left and right side plates 21,
21 and is formed as a mouth-shaped frame with an open front side.

As shown in FIGS. 7 to 9, the back plate 20 has an oblique side 22 bent toward the front at its upper end. Also,
There is also an oblique side 2 inclined toward the front side at the do end of the back plate 20.
3 is formed.

An opening 24 is formed in the center of the oblique side 23, and protrusions 25.2 are formed at right angles toward the front on the left and right of the upper end of the opening 24.
5 is provided protrudingly.

A shaft 26 is rotatably supported between the projecting pieces 25, 25, and one corner of a triangular rotating frame 27 is fixed to the center of the shaft 26. A permanent magnet 28 is fixed to the front corner of the rotating frame 27. Further, a shaft 29 is horizontally suspended across the opening 24 and through the space defined by the triangular rotating frame 27, and limits the rotational limit of the rotating frame 27.

Further, a projecting piece 30 is provided near the lower side of the opening 24.
A reed switch 31 is fixed to this projecting piece 30 at a position where it can face the permanent magnet 28 .

Note that the lower end of the oblique side 23 is bifurcated toward the front side, and a horizontal portion 23a is formed on the upper side.

A strip-shaped projecting piece 32 is horizontally projected inside the lower end portions of the left and right side plates 21 and 21, and a support frame 33 having a single-shaped cross section is provided on the inner edge of each projecting piece 32. It is protruding towards. Furthermore, an inclined plate 34 is continuously provided at the innermost end of each projecting piece 32 toward the back plate 20 side, and the upper end thereof is in contact with the back plate 20.

Furthermore, protrusions 35 are cut and raised vertically downward at the lower end edge of the inclined plate 34 at positions closer to the left and right ends.

Both ends of a rectangular saucer 36 are placed on the left and right support frames 33,33. Further, the inner end of the saucer 36 has a protruding piece 35,
35 and is positioned.

On the other hand, a partition plate 37 bent in a V-shape toward the front side is horizontally suspended between the upper ends of the left and right side plates 21, 21. A quadrilateral notch 38 is located in the center of this partition plate 37.
is formed.

A projecting piece 39 is provided on the front side edge of the upper end portion of the left and right side plates 21, 21 to protrude outward at a right angle.

Further, on the outside of the upper end portions of the side plates 21, 21, a stopper 41 in the shape of a letter 41 is fixed on one side, and a stopper 42 in the shape of an opening is fixed on the other side, and a micro switch 43 is fixed to the stopper 42 in the form of an opening. has been done. These stoppers 41 and 42
contacts the projecting pieces 14, 14 of the base frame 1, and positions the middle frame 19.

Two through holes 44, 44 are formed in the upper end portions of the left and right side plates 21, 21, respectively, so as to face each other.

Using the opposing through holes 44, 44, the shafts 45.
46 is rotatably supported. These axes 45.46
are in the same horizontal plane. A feed roller 47 and a pull-out roller 48 (hereinafter simply referred to as rollers 47 and 48) having the same diameter are fixed to the center of the shafts 45 and 46, and a roller is disposed between the outer peripheries of these rollers 47 and 48. 4
A belt 49 having the same width as 7.48 mm is stretched.

Further, the width of the rollers 47, 48 is smaller than the width of the paper towel. The row 547 side is fitted into the notch 38 of the partition plate 37.

Further, a trowel-shaped support frame 50 is fixed to the outer upper part of one side plate, the left side plate 21 in FIG.
A worm gear 51 is rotatably supported vertically on this support frame 50 .

This worm gear 51 is fixed to the outside of the side plate 21.
It is connected to the output shaft of a motor 53 fixed to a frame 52 .

The worm gear 51 meshes with a worm wheel 54 fixed to one end of the shaft 45. Note that the shaft 45 is located inside the V-shaped partition plate 31.

Near the upper ends of the left and right side plates 21, 21, and through holes 44
．． Through holes 55 are formed between 44, and these through holes 5
5.55, the shaft 56 is rotatably supported. An annular groove 568 is formed at both ends of the shaft 56.
These grooves 56a are provided with a C ring 5 on the outside of the side plate 21.
6d is fitted and is prevented from being removed.

The one indicated by the code 57.57 is a guide arm and is approximately "to".
The connecting plate 58 is horizontally suspended between the upper edges of the bases of the guide arms 57, 57.

Through holes 57a are formed at the base ends of the guide arms 57, 57, and a shaft 56 is rotatably fitted into these through holes 57a, 57a.

The base end of the guide arm 57.57 has an annular groove 56b formed symmetrically near both ends of the shaft 56;
A retaining ring 59 is positioned inside the grooves 56b and 56b, and is fitted into the grooves 56b to prevent the guide arms 57 and 57 from shifting.

Furthermore, the left and right arms of the rotating frame 60 are rotatably supported inside annular grooves 56c, 56c formed symmetrically in the center of the shaft 56, A retaining ring 61 is fitted to prevent the rotating frame 60 from shifting.

A roller 0-562 is rotatably supported at the tip of the rotating frame 60, and this roller 62 is pressed against the roller 47 via the belt 49.

A printed circuit board 63 on which a control circuit is formed is fixed to the outer surface of the side plate 21 below the motor 53.

The inner frame 19 having the above-mentioned structure is positioned by engaging the inverted V-shaped notch 21a at the lower end of the front side of the side plates 21, 21 with the notch 9b at both ends of the projecting piece 9 of the base frame 1, and positioning the stopper. 41.
42 is pressed against the projecting pieces 14, 14 and housed in the base frame 1.

By the way, what is indicated by the reference numeral 64 is a cover, which has a cross-sectional shape along the front side edges of both side plates 2.2 of the base frame 1, and has a size that can cover the front surface of the base frame 1. .

Side walls 65 located on the outside of both side plates 2.2 of the base frame 1 are formed on the left and right edges of the cover 64, and an arm 66 is continuous to the upper end side of the cover 64 and continues to these side walls 65. are doing. The tip of the multi-arm 66 is connected to the side plate 2 via the bottle 66a.
, 2 is rotatably supported in the center of the upper end.

At the center of the back surface of the cover 64, there are projecting pieces 67 facing left and right.
, 67 are cut and raised, and a rotating frame 69 is rotatably supported on these projecting pieces 67 and 67 via a shaft 68. A roller 70 is rotatably supported at the tip of the rotating frame 69. The roller 70 is in a position where it is pressed by the roller 48 on the front side via the belt 49.

As shown in FIG. 10, a torsion coil spring 71 is wound around the shaft 68, and a 10th
In the figure, the rotation habit is given in the counterclockwise direction.

On the other hand, protrusions 72 are cut and raised inward at right angles at positions close to the left and right ends of the lower end of the inner surface of the cover 64, and these protrusions 12 are used to lock the upper end of the lock lever 73. It is rotatably supported on an axis.

The lock lever 73 is formed approximately in the shape of a square, and its upper end faces an opening 64a formed by cutting and raising the projecting piece 72. Further, a bent piece 74 is provided protruding at right angles in the middle of the lock lever 73, and a notch 74a formed in this bent piece 74 is connected to the protrusion formed in the side plates 2, 2 of the base frame 1. It is engaged with the underside of piece 6.

Further, as shown in FIG. 7, a torsion coil spring 76 is wound around the support shaft 75 of the lock lever 13, giving the lock lever 73 the ability to rotate clockwise in FIG. .

Next, the method of use and operation of this embodiment configured as described above will be explained with reference to the flowcharts shown in FIGS. 11 and 12.

First, in step S1, the paper towel P is set. At this time, the cover 64 is rotated upwardly around the pin 67 as shown in FIG. With the winding end of the paper towel P facing toward you, both ends of the paper towel P are placed on the protrusions 32, 32 at the bottom of the middle frame 19. Then, after introducing the end of the paper towel P between the belt 49 and the roller 62, the cover 64 is closed (step 82>).

Then, the back surface of the cover 64 presses the actuator of the microswitch 43, so the power is turned on and the control circuit is reset (steps 83 to 85).

At this time, as shown in FIG. 7, when the cover 64 is closed, the roller 70 is transferred to the roller 48 via the belt 49.
, the paper towel P is sandwiched between the belt 49 and the roller 70. Also, another roller 62
Also paper towel P and roller 47 via belt 49
is in contact with

Further, the bent piece 74 of the lock lever 73 contacts the protruding piece 6 and is rotated counterclockwise in FIG. 7 against the force of the torsion coil spring 76, so that the notch 74a and the protruding piece 6 are engaged. , the cover 64 is locked. To release the lock, insert your fingertip etc. into the opening 64a formed in the cover 64 and press the lock lever 7.
3 and rotate the lock lever 73 counterclockwise in FIG. 7 to disengage the projection 6 and the notch 74a.

Under the above-mentioned state, the paper towel P is automatically set to a standby state in step S6, and when one sheet is used, it is left in contact for a certain period of time and is automatically set to a standby state. This will be explained with reference to FIG.

When the paper towel P is set, the tip of the paper towel P is located on the back side of the upper end of the back plate 20, as shown in FIG.

In this state, as shown in FIG. 7, the tip of the paper towel P has not reached the rotating frame 27, so the rotating frame 27 is in a free state, and the permanent magnet 28 is approaching the lead switch 31. The switch 31 is OFF.

When control is started in this state, first, step 813
, the presence or absence of paper towel P is determined by the rotating frame 27.
That is, whether or not the paper towel touches the rotation frame 27 is constantly monitored. Since the reed switch 31 is OFF in the state shown in FIG. 7, it is detected that there is no vapor. In this case, the process proceeds to step S11, where timer A in the control circuit is set and the process is made to wait for a certain period of time until the timer counts up.

When the count-up ends, the process advances to step 818.
Timer B is set, and at the same time the motor 53 is rotated, the shaft 45 is rotated via the worm gear 51 and the worm wheel 54, the shaft 46 is rotated via the belt 49, the paper towel P is sent out, and the timer B is set in advance. Start counting the values.

When the paper towel P is sent out, the leading end of the paper towel P comes into contact with the rotating frame 27 soon. This state is constantly monitored in step 819, and if the rotating frame 27 detects a paper towel before timer B counts up, timer B is reset in step 820.

Next, the process proceeds to step 821, where the timer C is set, the motor continues to be driven, and the paper towel P
to be sent. Then, in step S22, the timer C counts up, the motor 53 stops, the feeding of the paper towel P is stopped, and the paper towel P is fed out by a certain length J (step S22).
23). This state is the use standby state shown in FIG.

By the way, if the paper towel P is not detected until the timer 8 counts up in step 819, the motor 53 is stopped at the same time as the timer 8 counts up in step 324, the paper towel feeding is also stopped, and the process proceeds to step S7, which will be described later. move on.

Further, if it is detected in step S13 that the paper towel P is present on the rotation frame 27, the paper towel P has been fed out by a predetermined length, and therefore the process goes to a standby state in step S14. When the user tears off the paper towel P from the perforation in this state (step 515), the process proceeds to step 816, where the rotary frame 27 detects that there is no paper towel P, and the process proceeds to the control from step 817 described above.

When all the operations in step S6 are repeated as described above and the paper towel P is used up, this is detected in step S1 of FIG. open. Then, the microswitch 43 is turned off in step S9, the power is turned off in step 810, the paper towel P is replaced in step 811, and the process returns to step S1.

On the other hand, after the circuit is reset in step S5,
If the cover 64 is opened by mistake in step 812, the process advances to step S9, and the microswitch 43 is turned off.
FF, and when the cover 64 is closed again, step S2
Return to step 83 and repeat the operations.

[Effects] As is clear from the above description, according to the present invention, the paper towels P can be sequentially fed out and used so as to be torn off one by one. is sent through the
The widths of the rollers 47 and 48 are significantly narrower than the width of the paper towel P, and are located at the center of the paper towel P in the width direction. Therefore, the paper towel is pulled out with a force of 5tlI applied only to the central portion.

Therefore, since the paper towel P is pulled out with force concentrated in only one place, the paper towel P is fed without meandering.

Further, since the belt also serves as a power transmission means from the motor, a separate power transmission means such as a chain or a gear mechanism for rotating the two rollers is not necessary.

Additionally, because the paper towel is fed over the top of the belt, the leading edge of the paper towel will not be caught or dropped.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention. Fig. 1 is an exploded perspective view of the inner frame, Fig. 2 is an exploded perspective view of the whole, Fig. 3 is a perspective view of the main parts, and Fig. 3 is a partially enlarged vertical side view, FIG. 5 is an external perspective view, FIG. 6 is a perspective view with the cover open, FIGS. 7 to 9 are vertical side views explaining the operation, and FIG.
FIG. 0 is a longitudinal sectional side view with the cover open, and FIGS. 11 and 12 are flowcharts for explaining control operations. DESCRIPTION OF SYMBOLS 1... Base frame, 2, 21... Side plate, 13... Mounting plate, 19... Middle frame, 45.46.56... Shaft, 47.
48...roller, 49...belt, 58.69...
・Rotating frame, 62.70...Roller, 73...Lock lever-1P...Paper towel. Fig. 7 13...Mounting machine 49...
Belt 19...Inner frame 58.69
...Song rotation frame 45.46. ·· shaft
73...Song Rock Lever! l)6
P...Paper towel No. 6
Figure 1...Base frame 2.21...Side plate 13...Mounting plate 19...Inner frame 45.46. ...Curved axis 49 ...Belt 58.69 ...Rotation frame 73 ...Lock lever P ...Paper towel No. 9 TjJ

Claims (2)

[Claims] (1) A paper towel pull-out roller and a feed roller are provided facing each other in the middle of the paper towel feeding path and at the center of the width of the paper towel, and an endless belt is stretched between the outer peripheral surfaces of both rollers. The paper towel dispensing machine is characterized in that the pull-out roller is located further back than the feed roller in the paper towel feeding direction. (2) The pull-out roller and the feed roller have the same diameter, each thickness is smaller than the width of the paper towel, and the width of the belt is approximately equal to the thickness of both rollers. paper towel dispensing machine.