JPS5837882Y2 - Dispenser for flexible sheet materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dispensing device, and more particularly to a flexible sheet dispensing device that includes a guiding mechanism that ensures that the web of flexible sheet material is held taut at all times about the slot rollers of a perforating mechanism. Concerning a dispensing device for wood.

Dispensers for perforating or cutting webs of flexible sheet material, such as paper towels, to divide the web into solid sheets have long been known.

A typical dispenser is...Milton (Ham)
11 ton) etc. U.S. Patent No. 1133640
US Pat. No. 1,449,062 to S chroeder, US Pat. No. 1,467,481 to Julins, US Pat.
), U.S. Patent No. 1.543299, B i r
U.S. Pat. No. 2,193,759 to Steiner, U.S. Pat. No. 2,242,552 to Steiner, U.S. Pat.
No. 78,029, U.S. Pat. No. 2,560,061 to Agamaite and British Patent No. 723,355 to Birr.

These dispensers are perforated in the web (L
Since there is no mechanism provided at the front and back of the machine to tension the web, it is not possible to cut wrinkled paper towels neatly.

The dispenser of the present invention has a pair of pinch rollers before and after the perforated opening in the web to hold the web, such as a paper towel, taut during the perforation process.

It is therefore possible to perform a complete perforation on the wrinkled paper towel and tear the web cleanly into individual sheets.

Basically, the flexible sheet material dispensing device of the present invention comprises a wall-accessible paper dispenser operatively connected to said chassis for rotating a roll of flexible sheet material. a device operably connected to the chassis and capable of supporting a web of flexible sheet material from the roll to a position where a user can grasp the web of flexible sheet material from the roll; a perforating mechanism rotatably coupled to the web for perforating the web at intervals along the web and dividing the web into sheets; A knife receiver is provided with a loading roller, the knife receiver is a rotatably mounted knife positioned adjacent the loading roller, and the knife receiver is provided with a rotatably mounted knife disposed adjacent the loading roller, the knife receiver having a web extending between the loading roller and the knife. a knife having a radially outer portion forming a cutting edge for perforating the web as it passes; a perforation mechanism operatively connected to the knife, the perforation mechanism having a slot for receiving the radially outer portion as the knife passes the knife receiving roller; a stop mechanism for stopping rotation of the knife-receiving roller and thus stopping movement of the web after a predetermined length of web has been withdrawn from the dispenser, the guide device being adjacent to the knife-receiving roller; a rotatably mounted upper pinch roll disposed in a direction opposite to the direction of normal movement of the web through the dispenser and spaced from the knife; and adjacent to the knife receiving roller; rotatably disposed and spaced from the knife in the direction of normal movement of the web through the dispenser and further movable toward and away from the knife receiving roller. a lower pinch roll; and a pressing device that pushes the lower pinch roll toward the knife-receiving roller, so that when a user first pulls the web, the lower pinch roll responds to the pressure of the pressing device. moving away from the knife-receiving roller so that the web moves against the knife-receiving roller with the bottle 6.
and the upper and lower pinch rolls cooperate with the knife-receiving roller to ensure that the web is taut around the knife-receiving roller as the knife and knife-receiving roller rotate. It is characterized by being

The web guiding device is preferably used in conjunction with the perforation mechanism to keep the flexible sheet material taut around the rollers at all times to further reduce the tendency of the web to curl around the cutting edge of the knife.

For this purpose, the guide device preferably comprises a pair of rotatably mounted pinch rolls arranged adjacent to the knife-receiving roller on each side of the position where the knife enters the slot of the knife-receiving roller. .

At least a pinch roll spaced in the conventional direction of travel of the web past the dispenser from the position where the knife enters the slot in the knife-receiving roller is movable towards and away from the knife-receiving roller. a pressing device is provided for pressing the pinch roll toward the knife receiving roller so that the web is held taut about the knife receiving roller as the web is withdrawn from the dispenser by a user; When the user releases the web, it continues to be held taut against the knife receiving roller.

With the above in mind, it is an object of the present invention to provide a flexible sheet material dispensing device having a mechanism for effectively guiding a web of flexible sheet material, particularly a web of flexible sheet material with relative extensibility. The goal is to provide the following.

It is another object of the present invention to provide a web of flexible sheet material that is compact, robust in construction, economical to manufacture, and thus ideally suited for both commercial, mortuary and residential facilities. To provide a flexible sheet material dispenser having a perforation guiding mechanism.

These three and other objects of the present invention will become more apparent upon consideration of the detailed description of the preferred embodiments shown in conjunction with the following drawings.

The dispensing device of the present invention, designated by the reference numeral 10 in the drawings, essentially rotates a roll of flexible sheet material, such as a roll of crinkled paper towel 150, and a roll of flexible sheet material, such as a roll of wrinkled paper towel 150. A support device 14 (see FIG. 6) that allows the web to be supported and a guide device 16 (see FIG. 6) that guides the paper towel web from the roll 150 to a position where the user can grasp it so that the web can be pulled from the dispenser 10. 4 rotation and FIG. 5) and a perforation mechanism 18 (see FIG. 5 and FIG. ).

The palm 12 is attached to the wall 21 with suitable fasteners such as screws 22.
(See Fig. 2) A back plate 20 (second
(see Figures 4 to 8).

The left end flange 24 (see Figure 5) and the right end flange 26 (
(see FIG. 4) is integral with the back plate 20.

Left end plate 28 (see FIG. 5) is secured to left end flange 24 with suitable fasteners such as screws 30.

The right end plate 32 (see FIG. 4) is similarly secured to the right end flange 26 by suitable fasteners such as screws 34.

A bottom plate 36 (see FIGS. 4, 5, 7, and 8) extends forward from the bottom of the back plate 20 and curves upwardly near the front of the dispenser to form an upright arched portion 38. It terminates in

The rear portion of the bottom plate 36 has a plurality of holes 40 that align with a plurality of lugs 42 carried by a bottom flange 44 integral with the back plate 20.

Further, the rear portion of the bottom plate 36 has tabs 29 and 33, respectively.
(See Figures 4 and 5), the left end plate 28 and the right end plate 32
The tab is integral with the end plate and spot welded to the bottom plate.

The front portion of the bottom plate 36 is connected to the left end plate 28 by tabs 46, 47, 4B (see FIG. 5) and by tabs 50, 5.
It is connected to the right end plate 32 by L 52 (see FIG. 8).

The tab is integral with the bottom plate and spot welded to the left and right end plates.

A plurality of heat dissipation holes 54 (see FIGS. 7 and 8) are connected to the bottom plate 36.
IC is formed to allow air to circulate inside the dispenser 10.

The palm 12 also includes a plurality of upright arched fingers 58.
(see FIGS. 3, 5, γ, and 8), the function of which will be explained below, has a Tough 60, 62 (see FIGS. 7 and 8), respectively. ) is attached to the left end plate 28 and right end plate 32.

The tab is integral with the stripper 56 and spot welded to the left and right end plates.

Arch down shield plate 64 (Fig. 5, Fig. 7, and Fig. 8)
) extends upwardly from approximately the midpoint of the bottom plate 36 and then forwardly to the top of the curved bottom plate portion 38 .

The lower portion of the shield plate 64 is defined by a flange 66 having a plurality of holes 68 that align with a plurality of lugs 70 carried by the bottom plate 36.

The upper portion of the shield plate 64 is connected to the left end plate 28 by tabs 72, 74 (see FIG. 5) and by tabs 76.7.
It is connected to the right end plate 32 by B (see FIG. 8).

The tab is integral with the end plate and is attached to the end plate by suitable fasteners such as screws 80.

The shield plate 64 and the base plate 36 define an elongated cavity 82 within the dispenser 10 in which the guide device 16 and perforation mechanism 18 are disposed.

The right end of the cavity 82 is surrounded by the right end plate 32, and the left end of the cavity is surrounded by a cover plate 84 (see FIGS. 5 and 1).

Cover plate 84U is connected to left end plate 28 by a plurality of fasteners, such as screws 86, which engage a plurality of bosses 88 formed in the left end plate.

A removable cover plate, such as left end plate 84, is used to enclose the left end of the cavity 82 to allow easy access to the interior of the cavity for servicing the guide device 16 and perforation mechanism 18. Ru.

The chassis 12 is surrounded by a flange 90 (see FIGS. 1 and 2).

...The flange 90 includes an upper portion 92 and a cap portion 94.
, a lower front portion 96, a lower left end portion 9B, and a lower right end portion 100.

Cap portion 94 is attached to upper portion 92 by a plurality of tabs 102 (see FIGS. 4 and 5).

...The other parts of the Uzi lug are joined together in any suitable manner, such as by spot welding the parts together at the openings where their respective edges overlap.

Lower front portion 96 defines an opening 104 through which a user may withdraw web 160 (see FIG. 3) from dispenser 10, as shown below.

The lower left and right end portions 98, 100 include integral bottom flanges (FIGS. 3-5, 8th and 9th rotations) adapted to surround the respective left or right outer portions of the bottom plate 36.
(see figure).

The housing 9Q is connected to the chassis 12 by pivot pins 106 and 108, and the pin 106 pivotally connects the lower left end lug portion 98 to the left end flange 24 of the back plate 20.
The pin 108 connects the lower right edge lug portion 100 to the back plate 2.
It is pivotally attached to the right end flange 26 of 0.

With this arrangement, the Uji lug 90 is connected to the pin 106.10.
8 and away from the palm 12, exposing the internal parts of the dispenser 10.

Attaching the locking device 111 to the rear of the cap portion 94,
Preferably, the housing is releasably secured to the chassis to electrically protect against access by outsiders to the interior of the dispenser.

Locking device 111 is preferably a combination locking device of the type disclosed in commonly owned U.S. Pat. No. 7,501,69, filed August 5, 1968.

The support device 14 includes a pair of support members 1 that are generally horizontally opposed to each other.
10,112 (see FIGS. 3 to 6).

A support member 110 (see FIGS. 3, 5, and 6) is attached to the left end of the chassis 12, and the attachment includes a bracket 114 and a bracket 116.

Attachment Bracket 114 is attached to back plate 20 and left end flange 24 by suitable fasteners such as screws 118.

. . , the bracket 116 is attached to the forward end of the bracket 114 by suitable fasteners such as screws 120.

... the tube 116 has a recess 122 defined by an arcuate bearing surface 124 and an arcuate inner edge of the guide lip 126.

A support member 112 (see FIGS. 3, 4, and 6) is mounted to the right end of the chassis 12, and the flexible mounting includes a bracket 128 and a bracket 130.

Attachment Bracket 128 is attached to backing plate 20 by suitable fasteners such as screws 132.

Bub 130 is attached to the forward end of bracket 128 by suitable fasteners, such as screws 134, and carries a pair of lugs 136 that align with a pair of slots formed in the bracket.

Knob 130 , like bub 118 , has a recess 138 defined by an arcuate bearing surface 140 and an inner arcuate edge of a guide lip 142 .

One end of the brake spring 144 is secured to the inner surface of the brake spring 130 by a suitable fastener such as a rivet 146, and the spring is threaded between the lugs 1360 and the brake spring 130.
0 to the rear and terminates near the back plate 20.

The support device 14 is adapted to rotatably support the roll 150.

Roll winding is described in Example 1 of commonly owned U.S. Patent Application No. 621,833, filed March 8, 1967.
Preferably, it is of the type disclosed as a fixed rotor (see FIG. 2).

The roll has an undivided internal support device 152 that includes a cylindrical core 154 and a pair of trunnion members 156, 158 attached to opposite ends of the core.

The outer ends of the trunnion members 156 and 158 extend axially outwardly beyond the ends of the roll 1500 and are adapted to engage recesses 122 and 138, respectively.

The outer ends of the trunnion members have different cross-sectional dimensions, and the recesses 122, 138 have respective internal dimensions that correspond to the cross-sectional dimensions of the outer ends of the trunnion members.

In this way, the roll 150 only engages the outer end of the trunnion member when each recess has a cross-sectional dimension that corresponds to the internal dimension of the recess, and especially when the recess 122 engages the outer end of the trunnion member 156. and the recess 138
is supported by support device 14 only when it engages the outer end of trunnion member 158 .

This feature allows the roll 150 to pass the web 160 through the guide device 16 and perforation mechanism 18 into the opening 104.
ensuring that the dispenser is placed within the dispenser in a manner suitable for removal from the dispenser via the

To insert the roll 150 into the support device 14, the outer ends of the trunnion members 156, 158 are placed against the guide lips 126, 142, respectively, and the roll is then pushed rearwardly.

When this occurs, the bracket 12B flexes outwardly and the outer ends of the trunnion members engage and sit within the recesses 122, 138.

After the roll is thus inserted into the support device, the flexible mounting bracket 128 connects the bub 130 to the bub 11.
6 to prevent accidental release of the roll.

As the roll is inserted into the support device, the spring 14
The end of the roll near 4 contacts the spring and moves the spring outwardly to the position shown in solid line in FIG.

Thereafter, as the web 160 is pulled out of the roll, the spring 144 frictionally engages the end of the roll;
The rotation of the roll is braked, thus preventing uncontrolled rotation of the roll.

The guide device 16 includes an upper pinch roll 162 and a lower pinch roll 164 (see FIGS. 3-5 and 8).

The upper pinch roll 162 has a stub shaft 166 rotatably supported on the cover plate 84 and the right end plate 32, respectively.
．． 168.

Similarly, lower pinch rolls 164 are each attached to stub shirts N 70, 172 which are rotatably journaled to cover plate 84 and right end plate 32, respectively.

The perforation mechanism 18 is located between the pinch rolls 162164 and includes a roller 1γ4 (FIGS. 3 to 5, FIG. 7, FIG. 8, 15th rotation and 17th rotation (Figure Sanki) included.

Slot 116 extends generally axially of roller 114;
It opens radially outward from the surface of the roller.

The slotted rollers have stub shafts 178 rotatably journaled in the cover plate 84 and right end plate 32, respectively.
180.

Perforation mechanism 18 also includes a knife 182 rotatably mounted by rollers 184.

The roller 184 is supported by stub shirts 11B6 and 188 rotatably supported by the cover plate 84 and the right end plate 32, respectively.

The bearing surfaces for the shafts 178, 186, 180, 188 are provided with low friction bushings 190, 194°192.19, respectively.
It is preferable that it consists of 6.

Bushes 190 and 194 are attached to cover plate 84, and Funyu 192
196 is fixed to the right end plate 32.

Stub shafts 166, 170, 168, 172 have elongated bearing surfaces 198, 202, 200, 204, respectively.
Bearing is carried out by

Bearing surfaces 198 and 202 are integrally formed with cover plate 84, and bearing surface 200° 204 is integrally formed with right end plate 32.

This arrangement causes each pinch roll to move in contact with the slot roller 174 to provide a push-scissor engagement therebetween.

A pressure spring 208 (see FIGS. 3 and 5) is connected to the stuff shaft 166, 170 and is connected to a similar pressure spring 208 (see FIGS. 3 and 5).
(See Figures 3 and 4) is a stub shirt) 168, 172
The pinch roll is connected to the slot roller and presses the pinch roll toward the slot roller.

The compression springs 206, 208 are held in place by U-shaped brackets 210, one of which is attached to the cover plate 84 and the other bracket to the right end plate 32 by any convenient method such as spot welding.

In order to bring the surfaces of the lower pinch roll 164 and the slotted roller 174 into contact with each other, the upright arched portion 38 of the bottom plate 36 includes a plurality of spaced apart relatively narrow arched portions. ), and the pinch roll 164 has a plurality of inwardly oriented slots )21'4 (see FIG. 7) for receiving the strips 212.

From roll winding 150, web 160 turns upper pinch roll 162, upper pinch roll and slotted roller 1
γ4, rotates the slotted roller, passes between the slotted roller and the lower pinch roll 164, and exits the dispenser through the lower pinch roll through the rotating opening portion 104.

As is clear from the foregoing, the pinch rolls 162, 164
ensures that web 160 is held taut around slotted rollers 174 at all times.

As the user withdraws the web from the dispenser while applying a pulling force to the unwinding end of the web, the pinch roll 164 moves out of contact with the slotted roller 174.

However, when the tension is relaxed, the pressure spring 206.
208, immediately move the pinch roll and bring it into contact with the slot roller.

Slotted roller 174 also includes a plurality of circumferential slots 216 that accommodate stripper 560 fingers 5B.
has.

Fingers 58 ensure that web 160 sticks to the slotted roller and is guided out of opening 104 instead of wrapping around it.

The knife 182 is spirally twisted along its entire length;
It includes a radially outer portion 217, which portion 21γ is curved forward in the direction of rotation of the knife and has a serrated cutting edge 22.
0 (Fig. 4, Fig. 5, Fig. 7, Fig. 8, Fig. 12, Fig. 1
4 and FIG. 11).

The knife has a plurality of notches 218 that include:
As the knife rotates toward and past the slotted rollers 114, it accommodates the strips 212 of the bottom plate portion 38.

As the knife rotates past the slotted rollers, the radially outer knife portion 211 enters the slot 176 and cuts across the entire width of the web 160 except for the portion of the web where the cutting edge 220 aligns with the notch 218. Gradually make perforations.

The portion of the web that is not perforated has sufficient tensile strength for the user to apply a smooth, continuous pulling force to pull the web from the dispenser.

However, after the web has been perforated, if the bow tension is rapidly increased, the web will be cut along the perforation just created by the cutting edge 220.

Knife 182 is attached to knife roller 184 by a pair of mounting brackets 222 .

The knife is conveniently first secured to the mounting bracket by welding, and then a helical twist is applied to the knife and bracket.

The bracket is then attached to the knife roller 184 by a plurality of bolts 224 that thread into a pair of bosses 225 located inside the roller.

After imparting a helical torsion to the member, the knife and mounting bracket are inserted into the center and outward through the gap so that the entire radially inner surface of the member contacts the knife roller 1840 surface. It is bent in an arched direction.

(See Figures 12 and 13) Additional bolts 224 are used to secure the knife roller 184 to the boss 226K to ensure that the boss is securely secured within the roller.

Slot roller 174 and knife roller 184 are operatively associated to ensure that both rollers rotate synchronously with each other.

To this end, a gear 226 is fixed to one end of the slotted roller and meshes with a gear 228 fixed to the same end of the knife roller.

In the illustrated implementation, gear 228 has twice the number of teeth as gear 226, and the slot roller rotates at twice the rotational speed of the knife roller.

2 (due to this difference in rotational speed of the fixed rollers, slot 1
16 must be twisted over twice the arc that knife 182 is twisted.

In this way, the knife is twisted helically over an arc of 45° (see FIG. 16) and the slot 1γ6 is 900°
It is twisted spirally over 0 arc.

(See FIG. 11) To prevent the web 160 from slipping around the slotted rollers, the slotted rollers are preferably made from a material with a relatively high coefficient of friction, such as rubber.

When a user applies a pulling force to the unwinding end of the web, the frictional force exerted by the web on the slot roller causes the slot and knife roller to rotate in synchronization with each other.

The trajectory of the cutting edge 220 relative to the slot h176 during the perforation process of the knife is shown in FIG. 23 by the dashed line 221.

The relative position of the cutting edge 220 and a point 225 on the knife at the radially outer end of the bracket 2220 is also shown in FIG.

The position of cutting edge 220 is point 0'. 2', 4', 6'
, 8', 10', 12', 14', 16', 18', the position of the knife point 225 is the point σ Z/ , 4)
.

! , r, FL1rL12', 1F, 1fi', 1F! Shown below.

The position of the radially outer knife portion 217 with respect to the slot 1γ6 during the perforation process is such that the cutting edge 220
A dashed-dotted line connecting the corresponding position point of point 225, i.e. 't-)O
'tσ, 2', 7.4', 4', 6', ff
.

8', F! , 10', 1σ, 12', 12'
, 14', 14°16', 1ff, 18', IEr
It is shown by.

As shown, during the movement of knife portion 217 from position 0', ``to position 6'', ``, i.e., during its entry into slot 176, cutting edge 220 is directed in the direction in which knife portion 211 moves. oriented in almost the same direction.

The same relationship between the direction of the cutting edge and the direction of movement of knife portion 217 is maintained for web 160 as for slot 176.

In this manner, the web 160 is held taut about the slotted roller 174 by the pinch rolls 162, 164 and by the pulling force applied to the web by the user, as described above.

As a result of this feature, as slot 176 rotates toward knife 220, the portion of the web overlying the slot curves to match the curvature of the surface of slot roller 114;
There is also no relative movement between the surface and the web portion.

Thereafter, when knife portion 217 reaches position 0'-σ and slot 176 reaches the position shown in FIG. It roughly corresponds to the direction of movement relative to.

This relationship is held open when the knife portion 21γ moves from position 0'-σ to position σ-σ', ie, when the knife portion enters the slot.

In this manner, the curvature of the knife portion 2170 pre-cuts orients the cutting edge 220 generally in the direction in which the knife portion 217 moves relative to the web during entry of the knife portion 217 into the slot.

The interception and actuation of perforation mechanism 18 provides several advantages over prior art perforation and cutting mechanisms.

The orientation of the cutting edge provides effective perforation in the flexible sheet material web by reducing the tendency of the cutting edge to slide along the web.

The system is also economical to manufacture and provides a robust, compact structure that can withstand the wear and tear of long-term abuse that occurs in commercial washrooms and kitchen facilities.

Dispenser 10 also abruptly stops rotation of knife roller 184 and slot roller 176, thus causing web 16 to stop rotating.
Mechanism 233 (Figs. 4 and 10) that suddenly prevents the movement of 0
), the paper towels can be torn one by one from the web 160 along the perforations just created by the knife 182.

The stop mechanism 233 includes a stop lever 230 which is pivotally connected to the right end plate 32 by a pivot pin 232 and has a cam follower 234 and a stop lug 233 secured together.

The stop mechanism also includes a feed wheel 240 which is secured to the end of a stub shaft 188, one of the shafts supporting the knife roller 184, and has a cam pin 238 secured thereto.

Cam pin 238 connects cam follower 234 and stop lug 236.
The rotation of the knife roller 184 and the slot roller 1740 is stopped.

As the knife roller rotates as the user applies a pulling force to web 160, cam pin 233 rotates about the axis of shaft 188.

While the knife roller is rotating, the stop lever 230,
Cam follower 234 and stop lug 236 are in the position shown in solid lines in FIG.

In this position, the cam follower is in the orbit of rotation of the cam pin 238, so that when the cam pin reaches the position shown in solid line in FIG. 10, the cam pin engages the underside of the cam follower; Push the cam follower upwards.

This actuation pivots the stop lever 230, cam follower 234, and stop lug 236 to the position shown in dashed lines in FIG.

In this position 3, the stop lug is in the orbit of rotation of the cam pin 233, so that when the cam pin is disengaged from the underside of the cam follower, the cam pin subsequently engages the stop lug.

As a result, the knife roller 184 and the slot roller 17
4 stops abruptly, thus abruptly arresting the movement of web 160 and, as a result, rapidly increasing the tensile force acting on the web.

As explained above, this allows a solid sheet of paper towel to be torn from the web along the perforations just created by knife 182.

The timing device 23γ works in conjunction with the stop mechanism 233 to adjust the length of time that the stop mechanism effectively prevents rotation of the knife roller and slot roller.

Timing device 237 (see FIGS. 4, 7, 8, 9th rotation, and 10) includes a pair of opposed resilient vacuum cups 24.
2,244, and the cup 242 is attached to a bracket 246.
The cup 244 is connected to a flange integral with the right end plate 32 by a mount 248.

When the cam pin 238 engages the underside of the cam follower 234 and the stop lever 230 is pivoted upwardly to position the stop lug 236 in the cam pin's rotational path, the vacuum cup 242 pivots rearwardly and engages the vacuum cup 244. It becomes a vacuum grip relationship.

As long as the vacuum cups 242, 244 are held in vacuum gripping relationship, the stop lug 236 remains in the rotational orbit of the cam pin 238, preventing the knife roller 184 and slot roller 174 from rotating upward.

Preferably, vacuum cup 242 is made of a relatively hard elastic material, such as hard rubber, and vacuum cup 244 is made of a relatively soft elastic material, such as soft rubber.

This arrangement minimizes the compressive force required to engage the vacuum cups into vacuum gripping relationship, and also provides sufficient vacuum gripping force between the vacuum cups, i.e., the force necessary to pull the vacuum cups apart, and the cam pin 238 ensures that the vacuum cup is not pulled apart when the stop lug 236 is engaged.

The resiliency of the vacuum cups 242, 244, particularly the relatively flexible vacuum force tabs 2440, provides a cushion to absorb the dynamic forces created by the sudden engagement of the stop lugs 236 and cam pins 238, thus increasing the effectiveness of the stop mechanism. Minimize component wear.

To adjust the amount of time that the vacuum cups 242, 244 are in vacuum gripping relationship, a needle valve 250 (first
(see Figure 1).

Valve 250 is mounted within bracket 246 and communicates with the interior of vacuum cup 242.

The valve includes a cylindrical valve body 252 having a hole 253 formed therein, and a needle-tipped adjustment bolt 254 that threadably engages an end flange of bracket 246.

Bolt 254 is secured in place by lock nut 255 which threadably engages the bolt and abuts the end flange of bracket 246.

By adjusting the position of bolt 254 relative to hole 253, the rate at which ambient air enters the vacuum environment between vacuum cups 242, 244, and thus the length of time that the vacuum cups remain in vacuum gripping relationship, can be adjusted.

A return spring 256 is connected between the bracket 246 and the forward portion of the right end plate 32 such that the air pressure in the environment between the vacuum cups 242 and 244 increases sufficiently to break the vacuum gripping relationship between the vacuum cups. When this occurs, the stop lever 230 is pivoted downwardly, thus moving the stop lug 236 out of the rotational orbit of the cam pin 238.

The user then removes the next length of web 16 from the dispenser.
0 can be pulled out and the web is perforated by the knife 182 in the manner described above and the stop mechanism 233
When the knife roller 184 and slot roller 174 stop rotating again, the paper towel can be separated into individual sheets and then torn.

As mentioned above, the feed wheel 240 is connected to the stub shaft 1
88.

Preferably, the supply wheel is fixed to the shaft by a bolt (not shown) that threadably engages the shaft in its axial direction.

The end of the shaft 188 is equilaterally triangular in cross-section (see FIGS. 4 and 10) and has a similarly shaped opening in the center of the feed wheel 240 to receive the shaft end therein. .

The feed wheel may thus be fixed to the shaft in any one of three (3) fixed rotational positions.

When the feed wheel is pressed into one rotational position (see FIG. 4), the cam pin 238 engages the stop lug 236 and the nascent perforation of the web 160, indicated at (P), is pulled out of the dispenser 10. Before that, the knife and slot rollers stop rotating.

After the user tears each paper towel from the freshly created perforated web in the dispenser, the web's pull-out edge is then located in the dispenser and is thus immediately in the user's hands. It will be prevented from reaching you.

This method of operation saves the consumption of roll windings 150.

After the time period in which the timing device 237 operates the stop mechanism 233 to prevent rotation of the knife roller and the slot roller, the knife roller and the slot roller are removed from the feeding device 25.
8 to move the withdrawal end of the web to the outside of the dispenser.

Feed device 258 (see FIGS. 4 and 1) includes a lug 260 secured to feed wheel 240 and a feed blade 262 coupled between lug 260 and a rearward portion of right end plate 32. As shown in FIGS.

Lug 260 is positioned relative to cam pin 238 such that spring 262 stretches when the cam pin engages stop lug 236 (see FIG. 4).

In this manner, when the stop lug 236 is moved by the return spring 256 out of the rotational orbit of the pin 238, the feed spring 262 is compressed, thereby causing the feed wheel 240 and shaft 188 to rotate.

Shaft 188 imparts rotation to knife roller 184 and slot roller 174 on the one hand, thus rotating web 1
Move the drawer end of 60 to the outside of the dispenser.

In the second rotational position of the feed wheel 240 relative to the shaft 188 (see FIG. 8), the stop mechanism 233
The rotation of the knife roller and slot roller is stopped after the perforation that has just been created in the web 160, indicated by (P'), is exposed to the outside of the dispenser 10.

Due to this method of operation, the withdrawal end of the web is easily accessible to the user after each sheet of paper towel has been torn along the nascent perforation.

When this operating method is adopted, the bolt 254 is adjusted, and the time interval during which the stop E mechanism operates to stop the rotation of the knife roller and pinch roller is a short time, from immediately to 2 seconds, and the first Preferably, it is possible to obtain the second sheet of paper towel as soon as the sheet is torn from the web.

As is clear, this second method of operation is less economical than the first method of operation, but it is more convenient for the user's requirements than the first method of operation.

The first operating method is generally adopted when saving paper towel consumption is an important factor, such as in commercial washroom facilities, and the second operating method is used in commercial washroom facilities, etc. Used when user convenience is an important factor.

Dispensing device 10 is thus ideally suited for commercial or private use installations.

The third rotational position of the feed wheel 240 with respect to the shaft 188 is not used because the knife portion 217 is in the slot when the stop mechanism stops the rotation of the knife roller and slot roller.

This causes the web to be torn at least partially along the perforation that has just occurred, thus causing the perforation to be separated by the slotted roller 174 and the lower pinch roll 164.
In addition to separating the web before passing between
Undesirable bending forces are applied to the blade 182.

Dispenser 10 also includes an apparatus 265 for rotatably supporting a depleted roll of flexible sheet material, such as a depleted roll of wrinkled paper towel 264 (see FIG. 3). .

The support device 265 includes a pair of opposed flanges 266 integral with the back plate 20 (see FIGS. 4, 5, 7th rotation, and 8).
．． 268 included.

Flanges 266 and 268 extend from back plate 20 into a cavity 270 defined in the lower rear portion of the dispenser by back plate 20, bottom plate 36, and shield plate 64.

Each flange has an internal U-shaped cutout.

Flange 266 has a cutout 272 therein, and flange 268 has a cutout 274 therein.

The internal dimensions of the cutouts 272, 274 correspond to the cross-sectional dimensions of the outer ends of the trunnion members 156, 158, respectively.

In this way, once the roll 150 is partially consumed and designated as a roll 264, it is transferred from the support device 14 to the support device 265.

Once the roll is transferred from the support device 14 to the support device 265, it is no longer necessary to unwrap the web 160 from the guide device 16 and perforation mechanism 18.

The trunnion members are simply removed from the support members 110, 112 and inserted into the cutouts 272°214.

From this latter position, the web extends along path 216 (see FIG. 8) from the top of roll 264 to the top of upper pinch roller 1620.

After the partially consumed roll 264 has been transferred into the cavity 270, a new roll 150 is inserted into the support device 14 in the manner described above.

The web emerging from roll 150 is simply superimposed on the web emerging from roll 264 and passes through guide device 16 and perforation mechanism 18 in the manner previously described.

Thereafter, as long as paper towels remain wrapped around the partially consumed roll 264, the dispenser 10 dispenses double-thickness towels.

This feature of the dispenser is particularly suitable for commercial establishments where it is uneconomical to service the dispenser at non-regular intervals, such as daily.

In this case, the administrator does not have to wait until the rolls are completely consumed before servicing the dispenser, and the operator does not have to wait until the rolls are completely consumed before servicing the dispenser, and the operator does not have to wait until the rolls are completely consumed before servicing the dispenser, and when servicing the dispenser at the end of a regularly scheduled servicing interval, There is no need to be able to pick up the rolls.

The administrator simply transfers the partially consumed roll to support device 1.
4 to the support device 265, and insert a new L-roll into the support device 14.

A peephole 278 (see Figure 2) is provided to assist the administrator in determining whether a new roll needs to be placed in the dispenser at the end of a regularly scheduled maintenance interval.
is the upper housing portion 9 near the end of the roll 150
2.

By observing the diameter of the roll through hole 278, the administrator estimates the amount of paper towel remaining on the roll.

To load the dispenser 10, the nozzle 90 is first pivoted outwardly around the chassis 12 to expose the internal components of the dispenser.

A roll of flexible sheet material, such as roll 150, is then inserted into support device 14 as described above.

A web from a roll, such as web 160, is directed around upper pinch rolls 162, with the drawn end of the web resting in front of slotted rollers 114.

- The housing 90 is then pivoted upwardly around the shank 12 and surrounds the internal parts of the dispenser.

The feed wheel 240 is then rotated counterclockwise as viewed from the right end of the dispenser to feed the web through the guide device 16 and perforation mechanism 18 .

Arched strip 212 and lower pinch roll 16
4 ensures that the web is guided around the slotted rollers 174 and held taut.

For manual handling of the feed wheel when the internal parts of the dispenser are enclosed by the housing 90, a slot 280 is provided in the lower right edge lug portion 100 through which the lower portion of the feed wheel 240 is inserted. Extends.

(See FIG. 4) Dispenser 10 also includes a device to prevent rotation of feed wheel 240 in a direction opposite to the direction in which web 160 is to be fed through the guide device and perforation mechanism.

The device includes a ratchet m mechanism 282 (fourth
(see figure).

A resilient sleeve 288 is inserted into the base of the pawl and engages a plurality of notches 290 formed around the feed wheel 2400.

As long as the feed wheel rotates counterclockwise when viewed from the right end of the dispenser 10, the base of the pawl 2840 and the sleeve 288
pivots freely into and out of notch 290.

However, when attempting to rotate the feed wheel in the opposite direction, the pawl engages one of the notches and prevents rotation of the feed wheel.

The lug 292 carried by the right end plate 32 is attached to the pawl 284
located above to prevent the pawl from rotating about the pin 286, thus ensuring that the pawl is held in the proper position relative to the feed wheel 240 to prevent improper rotation of the feed wheel. do.

A second embodiment of the perforation mechanism is shown in FIGS. 18 to 21.

This embodiment of the perforation mechanism is the perforation mechanism 1
8 is employed within the dispenser 10 and includes an axially straight knife 300 mounted on an axially straight mounting bracket 302.

In all other respects, the knife roller assemblies of the second embodiment are identical to the knife roller assemblies of the first embodiment, including knife rollers 184, stub shafts 186, 188.
Includes a tumbler and a gear 228.

Slot roller 303 is used in conjunction with knife 300.

Slot roller 303 is slotted, except that instead of intermittent helical slots along its length, it has intermittent axially straight slots 304 that accommodate the radially outer portions of knife 3000. It is similar to 174.

The only difference in operation between the perforation mechanisms of the first and second embodiments is that the helical twisted knife 182 of the first embodiment progressively perforates the web; Only a small portion of the cutting edge is in contact with the web at a time.

This device requires only a relatively small force to be exerted on the web by the cutting edge in order to drive an effective perforation.

In contrast, the cutting edge of knife 300 perforates the entire width of the web at once, requiring slightly more piercing force.

An advantage of the second embodiment over the first is that the latter is somewhat more economical to manufacture since the knife and attachment do not require helical twisting of the bracket.

A third embodiment of the perforation mechanism is shown in FIG.

This embodiment also applies to the above-mentioned 1-! : Or it may be adopted in the dispenser 10 instead of the second embodiment.

A third embodiment of the perforation mechanism is a generally flat knife 30.
a pair of stub shafts 310 with the knife fixed to opposite ends thereof and bearing opposite ends of the knife roller;
is pivotally mounted on the knife roller 30B.

Also secured to each end of knife 306 is a cam, lug 312, which extends radially outwardly beyond the cutting edge of the knife.

Cam, lug 312 has internal axial slot 318
is adapted to engage a cam 314 mounted on each end of a slotted roller 316 having a diameter.

Contrary to implementation ψ11 described above, the surfaces of knife roller 308 and slotted roller 316 contact each other, thereby eliminating the need for a lower pinch roll to hold web 160 tightly around the slotted roller.

Knife 306 is normally pushed forward by a small spring (not shown) about 1 Da in the radial direction relative to knife roller 308 .

In this way, when the knife enters slot 318,
The cutting edge of the knife is oriented in approximately the same direction that the radially outer portion of the knife moves relative to web 160.

In this respect, the perforation driving action of the knife 306 is the same as the perforation driving action of the knife 182.degree. 300 described above.

After the knife 306 moves into the slot, the cam, lug 31
2 engages with cam 314.

The cam causes the cam lug, and thus the knife 306, to pivot rearwardly relative to the direction of rotation of the knife roller 30B.

This action allows the slot 318 to be narrowed enough for the knife to make an effective perforation while keeping the surfaces of the knife roller and slot roller in contact with each other.

After the knife is retracted from the slot and the cam lug 312 is disengaged from the cam 314, the biasing spring again pivots the knife 306 forward.

To ensure that knife roller 308 and slot roller 316 rotate synchronously with each other, the rollers are operatively coupled to the gears as described above for the first and second perforation mechanism embodiments. Preferably, it is linked to.

The foregoing constitutes a detailed description of the dispensing device and guiding mechanism of the present invention, which is adapted for use in, but not limited to, the dispensing device.

Furthermore, it is recognized that various modifications of both the dispenser and the guide mechanism used in the present invention may occur to those skilled in the art.

Therefore, the scope of the present invention should be limited only by the scope of the claims of the utility model registration.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the dispenser of the present invention, Fig. 2 is a right side end view of the dispenser shown in Fig. 1, and Fig. 3 is a side view of the dispenser of Fig. Figure 4 is a right side end view of the dispenser shown in Figure 1 with the housing shown in section, Figure 5 is a left side end view of the dispenser shown in Figure 1 with the housing shown in section, and Figure 6 is a side view of the dispenser shown in Figure 1 with the housing shown in section. A cross-sectional view along line 6-6 of the figure;
7 is a cross-sectional view taken along line γ-γ of selected parts of the dispenser; FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 7; and FIG. 9-9, FIG. 10 is an enlarged elevational view of the stop mechanism and related parts used in the dispenser shown in FIG. 1, and FIG. 11 is a timing device used in the dispenser shown in FIG. 1. Figure 12 is the first perforation mechanism used in the dispenser shown in Figure 1.
FIG. 13 is an elevational view of the knife according to the embodiment, and FIG.
4 is a side view of a knife roller assembly rotatably supporting the knife shown in FIG. 12; FIG. 15 is a side view of a slotted roller used in conjunction with the knife shown in FIG. 12;
6 is a cross-sectional view taken along line 16-16 of FIG. 14;
15 is a sectional view taken along line 17-11 in FIG. 15, and FIG. 18 is a knife roller assembly rotatably supporting a knife of a second embodiment of the perforation mechanism used in the dispenser shown in FIG. 19 is an elevational view of a slotted roller used in conjunction with the knife shown in FIG. 18; FIG. 20 is a cross-sectional view taken along line 20--20 of FIG. 18; FIG. 1st
8 is a cross-sectional view taken along line 21--21 in FIG. FIG. 16 is a schematic cross-sectional view showing the operation of the perforation mechanism comprising the knife roller assembly shown in FIG. 15 and the slot roller shown in FIG. 15;

Claims (1)

[Scope of utility model registration request] Dispensing for Flexible Notebook Material 150 ] OK, a chassis 12 adapted to be mounted on a wall, and a device 14 operatively connected to said chassis for rotatably supporting a roll 150 of flexible sheet material. , a device 16 operably connected to the chassis for guiding the web of flexible sheet material from the roll to a position where a user can grasp the web so that the user can pull the web of flexible sheet material 160 from the dispenser; , a perforation mechanism 18 operably connected to the chassis and rotatably mounted for perforating the web at intervals along the web and dividing the web into multiple sheets; a knife-receiving roller 174 and a rotatably mounted knife 182 disposed adjacent the knife-receiving roller, the knife 182 being rotatably mounted to the web as it passes between the knife-receiving roller and the knife; a knife having a radially outer portion 217 forming a cutting edge 220 for driving a perforation, the knife receiving roller being operatively connected to the knife for synchronous rotation with the knife;
a perforation mechanism having a slot 176 for receiving the radially outer portion of the knife as the knife passes the knife-receiving roller; a stop mechanism 233 for stopping rotation and thus stopping movement of the web after a predetermined length of web has been withdrawn from the dispenser;
and the guide device 16 is located adjacent to the knife receiving roller and spaced from the knife in a direction opposite to the normal direction of movement of the web through the dispenser. a rotatably mounted upper pinch roll 162 disposed adjacent the knife receiving roller and spaced from the knife in the direction of normal travel of the web through the dispenser; a rotatably mounted lower pinch roll 164 movable toward and away from the receiving roller; and a pressing device 206, 208 for pushing the lower pinch roll toward the knife receiving roller. , so that when the user first pulls the web, the lower pinch roll moves away from the knife-receiving roller against the pressure of the pushing device, so that the web is pulled against the knife-receiving roller with a bottle. let it be pulled,
The upper button and lower pinch roll cooperate with the knife-receiving roller to ensure that the web is pulled taut around the knife-receiving roller as the knife and knife-receiving roller rotate. A dispenser for flexible sheet materials.