JPH01244724A - Paper towel distributing machine - Google Patents

Abstract

PURPOSE:To prevent the head of a paper towel from falling between shafts or being entangled in winding by providing a pressing means to be separately contacted to a feeding roller and a drawing roller in a pulley construction and guiding the paper towel between the pressing means and rollers. CONSTITUTION:A feeding roller 47 and a drawing roller 48 adopt the pulley construction with a roller 62 pressed to the roller 47, and a roller 70 pressed to the roller 48. For a paper towel P, both edges are mounted on projecting pieces 32 and 32 in the lower part of a middle frame 19, and a winding end edge is introduced between the roller 70 and roller 62. Since the widths of the feeding roller 47 and drawing roller 48 are narrower than the paper width, a friction force is concentrated to the central part of the paper towel P, and simultaneously, the friction force is uniform in a width direction, and thereby, the towel P can be linearly fed. Since a belt 49 is stretched between both rollers 47 and 48, the head of the towel P strikes against the belt 49, and cannot fall and be wound up between shafts 45 and 46. Further, when the speed of the feeding roller 47 is stepped up, a sewing stitch can be opened by cutting the central part in a lengthwise direction by a prescribed distance. Consequently, it can be cut off by pulling the lower edge of the towel P.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is designed to automatically feed rolled paper towels to a position where a user can easily tear them off one by one from a perforation. This paper towel dispensing machine is related to a paper towel dispensing machine.

[Prior Art] A conventional paper towel dispensing machine of this type is equipped with a supply roller that pinches the tip of a rolled paper towel and feeds it out while pulling it out, and feeds the paper towel along a predetermined feeding path, starting from a perforation. It is designed so that it can be torn off one by one.

Additionally, many are equipped with a switch plate that can be pressed with a fingertip to trigger the action of dispensing the paper towel.

[Problems to be Solved by the Invention] The conventional device having the structure described above has several problems as follows.

One is that the length of the supply roller is equal to or greater than the width of the paper towel, and that the length of the supply roller is at least the same as the width of the paper towel, and that
Due to molding or assembly accuracy, it is rare for a set of rollers to be in uniform contact over the entire length, and as a result, frictional force is not applied uniformly across the entire width of the paper towel, causing the paper towel to meander or run diagonally. This causes problems such as not being able to cut along the perforations or breaking.

Another problem is that the dispensing machine has multiple shafts and rollers suspended between the left and right side plates, so when setting the tip of the paper towel, the tip of the paper towel may fall between the shafts or get caught. This is a problem.

Another problem is that paper towels have perforations that cross the width of the paper at regular intervals along the length, but when the user tears the paper towel one by one, they do not grasp the widthwise center of the paper towel. , since the edges are grabbed and pulled, there are problems in that the cutting is not done along the perforations and the material is torn irregularly.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, in the middle of the paper towel feeding path and at a position corresponding to the center in the paper width direction, a A feed roller that is narrower than the width of the paper and has a pulley structure and a pull-out roller are provided opposite to each other, and an endless belt is stretched between them so that it does not protrude from the roller surface. In addition to providing a power transmission mechanism between both ends, a structure is adopted in which pressing means that contact both rollers separately are provided, and the paper towel is guided between these pressing means and the rollers.

In addition, a structure can be adopted in which the feed roller can feed the paper towel at a faster speed than the pull-out roller.

[Function] When the above-mentioned structure is adopted, since the width of the feed roller and pull-out roller is narrower than the width of the paper, frictional force is concentratedly applied to the paper towel in the center, and this rIJ frictional force is uniform in the width direction. Therefore, the paper towel can be sent out in a straight line.

Furthermore, since a belt is stretched between both rollers, the tip of the paper towel hits this belt and does not fall between the shafts or get caught.

Furthermore, if the paper feeding speed of the feeding roller is increased, the perforation can be cut and opened over a predetermined distance in the center in the longitudinal direction.

As a result, when the user pulls the lower end of the paper towel, the paper towel can be reliably cut from the opening of the perforation along the perforation.

[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.

Projecting pieces 6 are cut and raised inward at right angles near the lower portions of the side plates 2, 2 on the near side.

The bottom plate 3 has a horizontal part 7 on the back side and an oblique side 8 facing upward on the front side. A bent piece 7a is formed at a right angle upward 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 protruded from both ends of the projecting piece 9, and a V-shaped notch 9b is formed at the center of the upper end of each projecting piece 9a.

Further, protrusions 10 are vertically protruded from the upper surface of the oblique side 8 on the front side of the protrusion 9 and at both left and right ends, and the upper end of each protrusion 10 is provided with a horizontal protrusion toward the front. Bend part 1
0a is formed.

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.

Also, projecting pieces 14 are provided at both ends of the front side edge of the top plate 5 to project vertically downward.

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 opening 18 is formed near the upper edge of the mounting plate 13. 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 bent piece 17
The folded piece 11.11 may be placed on the folded piece 16 by fitting it into the notch 17b at the upper end and the narrow part 4b of the opening 4C of the back plate 4.

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 trowel-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,
The oblique side 2 that is also inclined towards the front side at the lower 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 provided at right angles toward the front on the left and right sides 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, 21, and a support frame 33 having an L-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 into an L-shape toward the front side is horizontally suspended between the upper ends of the left and right side plates 21 and 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, an L-shaped stopper 41 is fixed to one side of the upper end portion of the side plates 21, 21, and an opening-shaped stopper 42 is fixed to the other side, and a microswitch 43 is fixed to the opening-shaped stopper 42. has been done. These stoppers 41, 42 contact the projections 14, 14 of the base frame 1 and position the middle frame 19.

Two opposing through holes 44 and 44 are formed in the upper end portions of the left and right side plates 21, 21, respectively.

Using the opposing through holes 44, 44, the shaft 451
46 is rotatably supported. These axes 45.46
are in the same horizontal plane. A feed roller 41 and a pull-out roller 48 having the same diameter are fixed to the center of the shafts 45 and 46 so as to face each other. Both mouths -547 and 48 are shown in Figure 3.
As shown in Fig. 4, a pulley structure is adopted, and its peripheral surface has a groove 47a with a quadrilateral cross section as shown in Fig. 4 (A), or a groove 47a with a cross section as shown in Fig. 4 (B). L-shaped grooves 48a are formed over the entire circumference, and these grooves 4
An endless belt 49 is stretched between both rollers 47 and 48 using rollers 7a or 48a.

The surface of the belt 49 is located inside the circumferential surfaces of the rollers 47, 48.

Chain sprockets G1 and G2 are fixed to one end of the shafts 45 and 46, the right end in the figure, and a power transmission chain C is stretched between them.

Hereinafter, both the feed roller 47 and the pull-out roller 48 will be simply referred to as rollers 47 and 48. The roller 47 side is fitted into the notch 38 of the partition plate 37.

Further, a support frame 50 in the shape of a mouth 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 L-shaped partition plate 37.

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 56a 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 base of the guide arms 57 and 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 ring 56b formed in a symmetrical manner 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 arm 57.51 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 row 562 is rotatably supported at the tip of the rotating frame 60, and this roller 62 is pressed by the roller 41.

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 a pin 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 row 548 on the front side.

As shown in FIG. 10, a screw recoil 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 72 are used to move the upper end of the lock lever 73'. is rotatably supported.

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 protruded at a right angle in the middle of the lock lever 13, and a notch 74a formed in this bent piece 74 is connected to a protrusion formed in the side plate 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 73, 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 bin 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. After the end of the paper towel P is introduced between the rollers 70 and 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 S5).

At this time, as shown in FIG. 7, since the cover 64 is closed and the roller 70 comes into contact with the roller 48, the paper towel P is sandwiched between the roller 48 and the roller 70. Further, another roller 62 is also in contact with the roller 47 via the paper towel P.

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 zero lever 73 counterclockwise in FIG. 7 to disengage the projection 6 and the notch 74a.

Under the above-mentioned conditions, the paper towel P is automatically set to the standby state in step S6, and after a certain period of time when one sheet is used, it is automatically set to the 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 21, so the rotating frame 21 is in a free state, the permanent magnet 28 is close to the reed switch 31, and the reed 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 21.
That is, it is constantly monitored whether the paper towel has come into contact with the rotating frame 21 or not. 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 817, where timer 8 in the control circuit is set, and the process waits for a certain period of time until the timer counts up.

When the count-up ends, the process advances to step 318.
Timer B is set, and at the same time, motor 53 is rotated, shaft 45 is rotated via worm gear 51 and worm wheel 54, shaft 46 is rotated via chain C, paper towel P is sent out, and timer B is set in advance. Start counting the values. Moreover, the belt 49 is also run.

When the paper towel P is sent out, the leading end of the paper towel P comes into contact with the rotating frame 21 soon. This state is constantly monitored in step 819, and if the rotating frame 27 detects a paper towel before the timer 8 counts up, the timer B is reset in step S20.

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 822, 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 $
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 B counts up in step 819, the motor 53 is stopped at the same time as the timer B counts up in step 824, the feeding of the paper towel is also stopped, and the process proceeds to step S1, which will be described later. move on.

Further, if it is detected in step 813 that the paper towel P is held by the rotating frame 27, the paper towel P has been fed out by a predetermined length, so that the process goes to a standby state in step 814. 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 S7 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 312, 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.

FIG. 13 and FIG. 14 illustrate another embodiment of the present invention. In each figure, the same parts as in the embodiment described above are denoted by the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, the feed row 575 has a large diameter, the pull-out roller 76 has a small diameter, and a belt 49 is stretched between the grooves of both rollers. However, the diameters of the circles formed by the bottom surfaces of the grooves of both rollers 75 and 76 are the same as shown in FIG.

When such a structure is adopted, when both rollers 75 and 76 are rotated, the paper towel is fed at a faster speed because the larger diameter feed roller 75 has a faster circumferential speed.

As a result, a cutting force acts on the paper towel at the center of the perforation, and the longitudinal center of the perforation is cut over a predetermined distance.

If the paper towel is fed in this state, even if the lower end of the paper towel is pulled near the corner during cutting, the pulling force will be concentrated on the opening and the paper towel will be accurately cut from the perforation.

[Effect] As is clear from the above explanation, according to the present invention, the width of the feed roller and the pull-out roller is made smaller than the width of the paper towel, so when feeding the paper towel, the widthwise center of the paper towel is Since the frictional force is concentrated in the area and generated uniformly along the paper width direction, the paper towel can be fed linearly, the paper towel will not meander or skew, and the paper towel will not break.

Also, since an endless belt is stretched between the feed roller and the pull-out roller, the tip of the paper towel hits this belt and is guided, so the tip of the paper towel does not fall or get caught between the rollers or between the shafts. There will be nothing left to do.

Furthermore, if the diameter of the feed roller is increased, the feed speed of the feed roller will be faster when feeding the paper towel, so the longitudinal center of the perforation can be cut over a predetermined distance, and the paper towel can be fed in this state. When the user pinches the bottom edge of the paper towel at any position and pulls it, the force is concentrated on the pre-cut perforations, making it possible to reliably cut the paper towel along the perforations. .

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and 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. 4 (A ). (B) is a partially enlarged vertical sectional side view showing different shapes of the rollers in FIG. 3, FIG. 5 is an external perspective view, FIG. 6 is a perspective view with the cover open, and FIGS. 7 to 9 The figure is a vertical TIfI side view explaining the operation, Figure 10 is a vertical side view with the cover open, Figures 11 and 12 are flowcharts explaining the control operation, and Figures 13 and 14 are the main FIG. 7 is a perspective view and a cross-sectional view of an installed state of another embodiment of the invention. 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.

Claims (5)

[Claims] (1) A mounting plate that is fixed to the wall side, a base frame that is detachably attached to the mounting plate, and a container that is detachably attached to the base frame and stores a rolled paper towel. a frame, and a cover that is rotatably supported on the upper end of the base frame and covers the front surface of the base frame, and the center in the longitudinal direction of the two shafts that are rotatably supported on the upper end of the middle frame; a roller having a width narrower than the width of the paper towel fixed to each section and having a groove formed all around the circumferential surface; an endless belt stretched between these rollers via the groove; pressing means respectively contacting the rollers;
A paper towel dispensing machine comprising: a paper towel detecting means provided in a paper towel running path at a lower part of the middle frame, and the belt is positioned inside the circumferential surface of each roller. (2) A paper towel dispensing machine characterized in that a power transmission means is provided between two shafts to which the rollers are fixed, and one of the shafts is driven by a motor. (3) The paper towel dispensing machine according to claim 1 or 2, wherein a viewing window is provided at the upper end of the base frame. (4) Any one of claims 1 to 3, characterized in that the roller located at the rear in the running direction of the paper towel is a pull-out roller, and the roller located at the front in the running direction is a feed roller. The paper towel dispensing machine described in . (5) The diameter of the feed roller is larger than the diameter of the pull-out roller, and the diameter of the circumferential surface of the bottom surface of the groove of the roller in which the belt is stretched is the same as claimed in claim 1. ~The paper towel dispensing machine according to item 4.