JP5864956B2 - Roll paper towel dispenser - Google Patents

Description

  The present invention relates to a roll paper towel dispenser obtained by winding a belt-shaped paper towel into a roll, and more particularly to a roll paper towel dispenser that automatically unwinds and discharges a paper towel having a predetermined length.

  The roll paper towel dispenser allows paper towels to be unwound from roll paper supported in a rotatable manner inside the housing, and the paper towel of the required length to be appropriately cut out from the paper discharge opening provided at the bottom of the housing so that it can be cut. However, in this type of roll paper towel dispenser, the optical sensor detects that the user's hand is positioned within the detection range, and the paper towel is removed from the roll paper that is rotatably supported inside the housing. There is an automatic paper discharge type that automatically feeds out a long paper towel from a slit-shaped paper discharge port provided at the lower part of the housing and enables cutting. The automatic paper discharge type roll paper towel dispenser is also called an auto dispenser, a hands-free dispenser, or the like.

  Conventionally, a sensor called “capacitance type” is conventionally used in such an automatic paper discharge type dispenser. This uses a metal plate as the sensor terminal and charges it. When a charged object approaches this metal plate, the charge on the metal plate changes. This is a mechanism in which the change in charge becomes a switch.

  However, since this sensor mechanism does not sense unless the hand is brought close to the dispenser body to about 1 cm, it is compatible with each person, especially in places where different heights such as children and adults are used in public places. It was difficult to install at a possible installation height. In addition, the metal plate that is the sensor terminal is stored in the dispenser body to avoid corrosion, but as a result, the position of the sensor is difficult to understand and the position where you hold your hand is difficult to understand, and problems such as being confused when using it was there.

  In view of such a problem, in recent years, in dispensers, since it is necessary to expose at least a part of the sensor to the outside or to provide a hole for the sensor, there is an optical sensor in which the sensor position is easily visible from the outside. It has come to be used.

  The optical sensor used in this automatic paper discharge type dispenser generally has a detection range that radially expands in a conical shape, and is based on a mode in which the dispenser is installed on the wall via the back of the housing. Therefore, the detection range is set so that the detection range becomes the downward projection range of the dispenser.

  However, this type of paper towel dispenser is often installed in a relatively narrow place such as a bathroom washstand or a wall near the water in a kitchen, etc. In some cases, the dispenser could not be installed, or the detection range was set in an unintended range, causing malfunction. In recent years, in this type of dispenser, downsizing has been promoted to increase the degree of freedom of installation location, but due to the limited detection range, the degree of freedom of installation range due to downsizing is also limited. It has been done.

  Conventionally, as a method for setting the detection range of the optical sensor, as shown in FIGS. 14A and 14B, a part of the sensor 150 is shielded by the shielding plate 170, so that the optical sensor 150 itself is set. However, in this method, the area of the light receiving surface 151 of the sensor 150 is narrowed, so that the sensor sensitivity may be lowered. In addition, there is a case where a sufficiently substantial detection range Z101 cannot be set as a desired range.

Special table 2008-521549 JP2010-068972 Special table 2003-339571 JP2007-190292 Special table flat 10-500068

  Therefore, a main problem of the present invention is to provide an automatic paper discharge type roll paper towel dispenser that can achieve a desired detection range without deteriorating sensor sensitivity. It is to provide a suitable sensor detection range in a dispenser for roll paper towels.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
It has a pyroelectric infrared sensor that detects that the user's hand is positioned in the detection range, and has a predetermined length from the paper discharge port according to the detection that the hand is held by the pyroelectric infrared sensor. Roll paper towel dispenser that automatically ejects paper towels,
The sensor is provided on the front side from the lower discharge port of the dispenser and has a radial detection range below.
A reflective member having a reflective surface that reflects the detection wavelength light and delimits a range to be collected by the sensor ;
The reflecting member has an edge on the paper discharge outlet side from directly below the sensor, covers the lower side of the sensor from this edge, and has a reflecting surface inclined downward toward the back side across the lower surface of the dispenser. And a lower surface of the dispenser, the paper towel dispenser is characterized in that the back side is open .

<Invention of Claim 2>
The paper towel dispenser according to claim 1, wherein the reflecting member is detachable.

<Invention of Claim 3>
The paper towel dispenser according to claim 2, wherein the paper towel dispenser has a plurality of reflection members having different shapes of reflection surfaces and different ranges of light collection by the sensor , and the detection range is changed by replacing the reflection members.

<Invention of Claim 4>
The paper towel dispenser according to any one of claims 1 to 3, wherein the reflective member is capable of adjusting an angle of a reflective surface.

<Invention of Claim 5>
The detection range surface projected on the surface extended toward the lower part of the dispenser by the reflecting member from the lower edge on the back side of the dispenser is contained within 20 cm from the lower edge on the back side of the dispenser. The dispenser for paper towels of Claim 1.

(Function and effect)
The dispenser according to the present invention, reflects the detection wavelength light by the pyroelectric infrared sensor, and a reflecting member having a reflecting surface defining a range to be focused on the pyroelectric infrared sensor is provided Therefore, the detection range can be freely set by adjusting the angle of the reflecting surface or by changing the surface shape. Further, it is not necessary to cover the light receiving surface of the sensor in defining the detection range, and sensor sensitivity can be ensured. In addition, since the detection range can be freely set without reducing the sensor sensitivity in this way, an appropriate detection range corresponding to the installation location or the size of the dispenser can be easily set. The degree of freedom of the installation position, in particular, the degree of freedom of the installation position due to downsizing can be increased.

  Furthermore, if the reflection member is detachable, it is possible to select whether or not the reflection member is attached according to the installation location, so that a plurality of detection ranges can be obtained without changing the sensor itself or its attachment position. The degree of freedom of the installation position of the dispenser, in particular, the degree of freedom of the installation position due to downsizing is further increased.

Further, if a plurality of reflecting members having different shapes of the reflecting surface and different ranges of light collected by the pyroelectric infrared sensor , for example, a plurality of reflecting members having different angles of the reflecting surface, can be selectively replaced. Further, the degree of freedom of setting the detection range, the degree of freedom of the installation position of the dispenser, and particularly the degree of freedom of the installation position due to compactness are increased.

  Furthermore, if the angle of the reflecting surface of the reflecting member can be adjusted, the degree of freedom of setting the detection range, the degree of freedom of the installation position of the dispenser, and particularly the degree of freedom of the installation position due to compactness are increased.

  Here, in the dispenser of the present invention, the detection range surface projected onto the surface extending downward from the lower surface of the dispenser by the reflecting member is within 20 cm from the lower edge of the rear surface of the dispenser. By doing so, the dispenser is less likely to malfunction.

  According to the present invention described above, an automatic paper discharge type roll paper towel dispenser that can achieve a desired detection range without reducing the sensor sensitivity is provided. In addition, in the automatic paper discharge type roll paper towel dispenser, A suitable sensor detection range is provided.

It is a perspective view from the bottom face side of the dispenser for roll paper towels which concerns on this invention. It is a perspective view from the upper surface side of the dispenser for roll paper towels which concerns on this invention. It is an internal structure side view which shows typically the internal structure example of the dispenser for roll paper towels which concerns on this invention. It is a perspective view for showing the example of attachment mode of roll paper in the dispenser for roll paper towels concerning the present invention. It is an internal front view which shows the example of the paper discharge mechanism which concerns on this invention. It is a front view of the reflection member concerning the present invention. It is a VII-VII arrow line view of Drawing 6, and is a top view of a reflective member concerning the present invention. It is a VIII-VIII arrow line view of Drawing 6, and is a sectional view of a reflective member concerning the present invention. It is a side view for demonstrating the detection range by the reflective member which concerns on this invention. It is a front view which shows another example of the reflection member which concerns on this invention. It is a perspective view which shows the example of a detachable attachment aspect of the reflection member which concerns on this invention. It is a figure which shows the other example of the reflection member which concerns on this invention. It is a front view for demonstrating the detection range by the reflective member which concerns on this invention. It is a figure which shows the example of the detection range restriction | limiting in the conventional dispenser.

Next, an embodiment of the present invention is shown in FIGS.
The roll paper dispenser X1 according to the present invention (hereinafter also simply referred to as dispenser X1) is a paper strip made of a long paper towel used for wiping skin such as hands and face, wiping food drip, moisture, etc. It is for rolled paper towels that are wound to form a roll.

In the dispenser X1 of this embodiment, a roll portion 20 of a roll paper towel (hereinafter also simply referred to as roll paper) 2 is circulated inside a casing 1 whose material is formed of a synthetic resin such as ABS resin or a metal material. A power drive source such as a support 30 that is movably supported, a rotatable paper discharge roller 4 and nip roller 5 that nips a paper towel 20A fed from the roll portion 20, and a motor that drives the paper discharge roller 4. (Not shown) is arranged, and the power driving source is activated in response to detection of an object to be detected (for example, a user's hand) by the pyroelectric infrared sensor 50 , whereby the paper discharge roller 4 is The paper towel 20A having an appropriate length is automatically exposed to the outside of the housing 1 from the paper discharge port 6 that is rotated and disposed at the lower portion of the housing 1.

  The housing 1 is composed of a case body 10 that is open on the front surface and a lid body 11 that covers a front surface opening portion of the case body 10, and is unwound from the roll paper 20 supported by the support portion 30 at a lower portion thereof. A slit-shaped paper discharge port 6 is provided for exposing the paper towel 20 </ b> A to the outside of the housing.

  The case main body 10 includes a top plate portion 12, a bottom plate portion 13, a back plate portion 14, and a pair of left and right main body side plate portions 15 and 15 extending forward from both side edges or both side edges of the back plate portion 14. The dispenser X1 of this embodiment is installed on a wall surface or the like via the back plate portion 14 of the case body.

  The lid 11 has a front plate portion 16 having a curved surface portion whose upper part is in a series with the top plate portion 12 of the case body 10, and is formed on the back side (back plate side) at right angles to the front plate portion 16. It has a pair of left and right lid side plates 17, 17 that extend, and is arranged so as to cover the front side open portion of the case body 10, and constitutes a box-shaped housing 1 together with the case body 10.

  The lid 11 is attached to the case main body 10 in a hatched manner via a shaft 10A. In the dispenser X1 of the present embodiment, the lid 11 is pulled down toward the front as shown by a one-dot chain line in FIG. As a result, the case main body 10 is opened to the front, the internal mechanisms such as the support portion 30 and the paper discharge roller 4 inside the housing are exposed, and the roll paper 2 can be replaced. In the illustrated embodiment, when the hatch type is used, the case body 10 and the lid body 11 are connected to each other via a rotation shaft provided at the lower part of each side plate portion 15, 17, and formed on the upper surface of the case body 10. The front opening portion of the case main body 10 is closed by the lid body 11 by the engagement between the stopper protrusion 18 and the engagement recess 19 formed on the upper surface of the lid body 11.

  Note that the structure and appearance of the housing are not limited to those described above.

  On the other hand, the paper discharge port 6 is provided in a slit shape so as to extend in the width direction of the housing at the lower surface portion of the housing 1, and in the illustrated example, in particular, the front side of the bottom plate portion 13 of the case body 10. A paper discharge port 6 is formed between the edge and the lower edge of the lid 11. Note that the paper discharge port 6 is not limited to the above form, and for example, a bottom plate portion may be provided on the bottom plate portion 13 or the lid body 11 of the case body 10 and formed there.

  On the other hand, in the dispenser of this embodiment, a cutting blade 60 is attached along the front side edge of the paper discharge port 6 so that the paper towel 20A exposed from the paper discharge port 6 can be easily cut. In the illustrated example, the cutting blade 60 is a saw blade, but is not limited thereto. The cutting blade 60 can be formed of a metal or a hard plastic resin.

  The support part 30 of the roll part 2 accommodated in the housing | casing 1 can take a known structure. In the form shown in the figure, it has a pair of arm portions 31, 31 extending from the vicinity of both side plates of the back plate portion 14 toward the front plate side (the front side when the wall surface is mounted), respectively, by a predetermined length. Supports 32 and 32 are attached to the tips of 31 and 31. In addition, not only the example of illustration but the arm parts 31 and 31 may be the aspect extended so that it may protrude in the horizontal direction from the side plate part 15, and are the aspects which hang down from the top-plate part 12. Alternatively, it may stand up from the bottom plate portion 13 toward the top plate portion 12.

  Further, the support portion of the illustrated example has the support bodies 32, 32 projecting inward in the horizontal direction at the inner side of the housing in a normal state, and at least one of them is biased to the normal state, With the base end portion as an axis, it is configured to jump upward as indicated by a one-dot chain line A in FIG. Furthermore, when the distance between the tips 32t and 32t of the pair of support bodies 32 and 32 is set to a distance less than the length (width) of the paper tube of the roll unit 2 in the normal state, the tips 32t and 32t are jumped upward. Further, the space between the tips 32t and 32t of the support is wider than the width of the roll paper 2 so that the space is opened. When the roll paper towel is attached, the roll 32 is inserted between the supports 32 and 32 with the support 32 being flipped up, and then the support is returned to the normal position by urging the support tip 32t, 32t is positioned in the paper tube, and the roll unit 2 is supported by the supports 32 and 32.

  On the other hand, the dispenser X1 of the present embodiment has a rod-shaped rotating shaft 40 disposed so as to be parallel to the axis when the roll unit 2 is attached to the support unit 30, and the outer surface of the rotating shaft 40 has a rubber surface. A sheet discharge roller 4 having a structure in which a plurality of rolls 41, 41. A paper towel 20 </ b> A fed from the roll portion 20 is sandwiched between the paper discharge roller 4 and the nip roller 5, and the paper towel 20 is discharged from the paper discharge port 6 by the rotation of the paper discharge roller 4. It is supposed to be paper. In this embodiment, the discharge roller 4 has a structure in which a plurality of rolls 41, 41... Are intermittently provided in the width direction coaxially with the rotation shaft 40, thereby reducing the weight of the discharge roller 4 as a whole. To save power. Further, by providing the paper discharge roller intermittently in the width direction, the pressure with which the roller hits the paper increases, and a predetermined amount of sheet length can be suitably obtained without causing slippage. In particular, when the paper discharge rollers are arranged densely at the center in the width direction and sparsely spaced at the side, the nip pressure at the side is weakened during paper discharge, and the tension easily escapes to the side. It is preferable that wrinkles do not easily enter during paper discharge. The configuration of the discharge rollers and the number of rolls 41 are not limited to this.

  Further, in the dispenser X1 of this embodiment, the paper discharge roller 4 is attached to the case body 10 and the nip roller 5 is attached to the lid body 11. When the lid body 11 is opened, the paper discharge roller 4 is attached. The roller 4 and the nip roller 5 are separated from each other so that the paper towel 20 is released and the maintainability is improved.

On the other hand, in the present embodiment, the paper discharge roller 4 transmits a driving force from a driving source (not shown) via a driving gear 42 provided on one end side of the rotating shaft 40 (right hand side in the illustrated example). And rotated. The driving source is a known motor or the like, and driving and stopping are performed according to a detection signal from the pyroelectric infrared sensor 50 . However, the structure for driving the paper discharge roller 4 is not limited to the configuration via the drive gear 42, and the rotary shaft 40 is rotated by appropriately interposing known mechanisms such as a gear, an endless belt, and a pulley. May be. Further, the rotating shaft 40 may be directly connected to the rotating shaft of the motor coaxially and rotated.

  Note that the paper discharge mechanism is not limited to the above-described embodiment, and for example, a feed roller that contacts the roll portion and a support portion that supports the roll portion may be rotated by an electric power source.

On the other hand, the pyroelectric infrared sensor 50 itself according to the present invention is desirably a passive type. In addition, the pyroelectric infrared sensor 50 has a radiation angle of a detection range of about 30 to 90 ° with the pyroelectric infrared sensor alone, considering the general size and usage of the dispenser X1. desirable. If it is less than 30 °, the detection range is too narrow, and if it exceeds 90 °, it is difficult to fit in the downward projection range of the dispenser. The pyroelectric infrared sensor 50 receives infrared light emitted from a heating element when the heating element is positioned in the detection range, and detects an energy difference from a steady state. It is particularly suitable for a general usage mode in such a dispenser, that is, a mode in which a user holds a hand, which is a heating element, over a detection range and discharges paper. In addition, this form of illustration is an example using this pyroelectric infrared sensor preferably.

On the other hand, the dispenser X1 of the present embodiment is provided with the pyroelectric infrared sensor 50 at a predetermined position, and when the detected object such as a user's hand enters the detection range of the sensor 50, the sensor 50 This is detected, this detection signal is transmitted to the control means, and the drive source of the discharge roller 4 is driven for a predetermined time via the control means. As a result, the paper towel 20A is exposed from the paper discharge port 6 by the amount of rotation of the paper discharge roller 4 corresponding to the drive time of the drive source. The control means for controlling the drive of the drive source such as the motor means in accordance with the detection signal detected by the pyroelectric infrared sensor 50 is not particularly limited and can be configured by an appropriate electric circuit.

Although the attachment position of the pyroelectric infrared sensor 50 can be set by the reflecting member 7 in the present invention, it is not necessarily limited. However, preferably, as shown in the drawing, the discharge port at the center in the width direction on the bottom side of the dispenser. It is better to attach to the front side than 6. If the pyroelectric infrared sensor 50 is attached to such a position, and the cone axis of the detection range of the pyroelectric infrared sensor 50 itself is directed directly below or slightly toward the wall surface (back plate side), the pyroelectric infrared sensor 50 It becomes easy to make the radial detection range having the apex not to reach the front side of the dispenser by the reflecting member 7 and to be a wide range within the downward projection range of the dispenser X1.

Here, in the dispenser X1 of the present invention, characteristically, the detection light from the pyroelectric infrared sensor 50 is reflected, and a range in which the detection wavelength light is condensed on the pyroelectric infrared sensor 50 is defined. A reflecting member 7 having a reflecting surface 70 is provided in the vicinity of the pyroelectric infrared sensor 50 .

  In particular, the reflecting member 7 shown in FIGS. 1 and 6 to 8 has a three-sided mirror shape composed of a front-side reflecting surface 71 and a pair of side reflecting surfaces 72 and 72 connected to this at a predetermined angle. .

In dispenser X1 of the embodiment described above illustrated, the reflecting member 7, the original mounting position of the preferred pyroelectric infrared sensor 50 described above, as shown in FIG. 9 or the like, a front side reflective surface 71 pyroelectric The optical sensor itself is inclined with respect to the dispenser bottom surface 13 </ b> A so as to extend from the front side position to the lower side of the back plate portion than the infrared sensor 50 , and radially spread with the pyroelectric infrared sensor 50 as a vertex. A part or all of the detection range P1 is attached so that the reflection surface 70 blocks it. Further, the reflecting member 7, the pyroelectric infrared reflective surface 70 slightly spaced position from the pyroelectric infrared sensor 50 and the light-receiving surface 51 so as not to block the sensor 50 is mounted so as to be located .

As a result of the attachment of the reflecting member 7, the detection range by the pyroelectric infrared sensor 50 deviates from the detection range by the portion P <b> 1 blocked by the reflecting surface 70 from the radial detection range that the pyroelectric infrared sensor 50 has. A range P2 reflected by the optical sensor 70 and condensed on the optical sensor is added as a new detection range. A part or all of the detection range is changed and defined by the reflection surface 70, and the pyroelectric red A substantial detection range by the outer sensor 50 is set.

  The area, direction, size, and angle of the reflecting surface of the reflecting member 7 that determines the substantial detection range of the optical sensor, for example, the front reflecting surface 71 and the side reflecting surface in the illustrated reflecting member 70. The angle ∠A, ∠B of 72 and the angle ∠C between the front-side reflecting surface 71 and the dispenser bottom surface 13A may be set according to the mounting position and size of the dispenser X1.

  In addition, the structure of the reflective surface 70 in the reflective member 7 is not limited to the above-mentioned trihedral mirror shape, but may be only one plane, may have more polygonal surfaces, and further, FIG. In addition, as shown in (B), which is an arrow view of (A), a curved surface or a spherical concave surface may be used.

The reflective surface 70 may be made of a material that reflects detection light having a wavelength detected by the pyroelectric infrared sensor 50 , and the specific material is not limited. For example, if it is infrared light, it comprises a metal mirror surface. Also, the shape and material of the reflecting member 7 are not particularly limited, and an aluminum plate, an iron plate, or the like is appropriately bent to be integrated with the reflecting surface 7, and an ABS resin or a polycarbonate resin is molded into an appropriate shape. After that, it can be formed with an appropriate shape and material, such as a structure in which a metal sheet or a metal plate such as an aluminum stay is pasted and installed to form the reflecting surface 70.

  Further, the reflection member 7 and the housing 1 may be integrated or separate. If the reflecting member 7 is separated from the housing 1, the reflecting member 7 may be attached to the housing with an adhesive, an adhesive, an adhesive tape, etc., or a known locking mechanism is adopted. Also good. Preferably, it is desirable that the housing 1 and the reflecting member 7 are detachable as separate bodies. As a detachable locking mechanism, for example, as shown in FIG. 11, a locking hole 13H is formed on the bottom surface 13A of the housing 1, and an engaging projection 73 is formed on the reflecting member 7 to be engaged therewith. These may be engaged so as to be detachable. Of course, it is not limited to this example. If the reflection member 7 is detachable, the detection range of the optical sensor 50 itself and the detection range changed by the reflection member 7 can be selected.

  Here, the number of the reflecting members 7 is not necessarily limited to one, and a plurality of reflecting members may be provided to define a substantial detection range. In addition, if it is detachable, different substantial detection ranges may be set by changing a plurality of reflecting members having different reflecting surface shapes. For example, in the case of the reflection member 7 having the reflection surface 70 constituted by the front reflection surface 71 and the side reflection surfaces 72 and 72, the angles ∠A and ∠B between the front reflection surface 71 and the side reflection surface 72 are shown. Furthermore, it is possible to prepare a plurality of reflecting members 7 having different attachment angles ∠C between the front reflecting surface and the dispenser and replace them. Further, if the reflecting surface 70 is a curved surface as in the example shown in FIG. 10, a plurality of reflecting members having different curvature radii of the reflecting surface 70 can be replaced. By replacing these with the housing 1 and making them attachable, the degree of freedom in setting the detection range increases.

  Further, the reflection member 7 may be capable of adjusting the angle of the reflection surface 70. For example, as shown in FIG. 12, if the front reflection surface 71 and the side reflection surfaces 72 and 72 are axially connected via the rotation shaft 75, the angle ∠A between the front reflection surface 71 and the side reflection surface 72, ∠B can be adjusted. Further, if the front reflection surface 71 and the engagement protrusion 73 are connected to each other via the rotation shaft 76, the angle between the front reflection surface and the dispenser bottom surface can be adjusted. In such a reflection member 7, according to the attachment position of a dispenser, those angles can be adjusted and a suitable detection range can be set, and the convenience becomes higher.

  The angle adjustment of the reflecting surface 70 is not limited to the above-described axis connection. For example, the angle of the reflecting surface 70 may be adjusted by configuring the reflecting member 7 with a metal material or a resin material that is plastically deformed.

  Here, as a substantial detection range set by the reflecting member 7 of the present invention, a preferred example is illustrated. As shown in FIG. 13, as shown in FIG. It is desirable that the detection range surface Z projected on the surface is equal to or narrower than the width direction of the dispenser and is within 20 cm from the lower edge on the back side of the dispenser (this portion is indicated by L1). Here, the detection range surface Z indicates a detection surface on the wall surface to which the dispenser is applied. Within this range, in the general installation mode in which the dispenser X1 is installed on the wall surface via the back plate portion 14 as described above, the most frequently assumed user stands on the front side of the dispenser and hands down the dispenser. In the operation mode of holding, regardless of the installation height, it is possible to prevent unintentional malfunctions when standing on the front of the dispenser or passing, and to detect with high sensitivity when the hand is held over It becomes.

In particular, the detection can be effectively performed by setting the detection range within 20 cm below the lower projection range of the dispenser by the reflecting member 7 and occupying 50 to 90% of this range. In order to set the above range, the pyroelectric infrared sensor 50 whose detection range has a radiation angle in the range of 30 to 90 ° is located at the center in the width direction on the lower surface of the dispenser and at a position of 0 to 10 cm from the front surface of the dispenser. As a mode in which the cone axis of the detection range is inclined at 0 to 50 ° to the back side of the housing, the reflecting surface 70 is positioned within a range of 5 cm from the optical sensor 50, and the pyroelectric infrared sensor 50 itself It is possible to easily set a part of the detection range that spreads radially, in particular, the range toward the front surface of the dispenser by bending the reflection member 7 in the rear side direction.

As described above, in the automatic paper discharge dispenser X1 according to the present invention, by providing the reflecting member 7, it is possible to set a substantial detection range by the pyroelectric infrared sensor 50 , and the dispenser X1 can be made compact. And increase the degree of freedom of installation. At that time, the light receiving surface 51 of the pyroelectric infrared sensor 50 is not shielded, so that the sensor sensitivity is not lowered.

  X1 ... roll paper towel dispenser, 1 ... housing, 2 ... roll part of roll paper towel, 20 ... roll paper towel, 4 ... discharge roller, 5 ... nip roller, 50 ... sensor, 6 ... discharge port, 31 ... arm part, 32 ... support part, 32t ... support part tip, 10 ... case main body, 11 ... lid body, 12 ... top plate part, 13 ... bottom plate part, 14 ... back plate part, 15 ... main body side plate part, 16 ... front plate part, 17 ... Lid side plate part, 18 ... Locking convex part, 19 ... Locking concave part, 60 ... Cutting blade, 30 ... Supporting part, 31 ... Arm part, 32 ... Supporting body, 32t ... Tip of supporting body, 40 ... Rotation Axis, 41 ... roll, 41 ... gap between rolls, 42 ... drive gear, 7 ... reflecting member, 70 ... reflecting surface, 71 ... front side reflecting surface, 72 ... side reflecting surface, 73 ... engaging protrusion, 13H ... Locking holes, 7 ... shielding plates.

Claims (5)

It has a pyroelectric infrared sensor that detects that the user's hand is positioned in the detection range, and has a predetermined length from the paper discharge port according to the detection that the hand is held by the pyroelectric infrared sensor. Roll paper towel dispenser that automatically ejects paper towels,
The sensor is provided on the front side from the lower discharge port of the dispenser and has a radial detection range below.
A reflective member having a reflective surface that reflects the detection wavelength light and delimits a range to be collected by the sensor ;
The reflecting member has an edge on the paper discharge outlet side from directly below the sensor, covers the lower side of the sensor from this edge, and has a reflecting surface inclined downward toward the back side across the lower surface of the dispenser. And a lower surface of the dispenser, the paper towel dispenser is characterized in that the back side is open .   The paper towel dispenser according to claim 1, wherein the reflecting member is detachable. The paper towel dispenser according to claim 2, wherein the paper towel dispenser has a plurality of reflection members having different shapes of reflection surfaces and different ranges of light collection by the sensor , and the detection range is changed by replacing the reflection members.   The paper towel dispenser according to any one of claims 1 to 3, wherein the reflective member is capable of adjusting an angle of a reflective surface.   The detection range surface projected on the surface extended toward the lower part of the dispenser by the reflecting member from the lower edge on the back side of the dispenser is contained within 20 cm from the lower edge on the back side of the dispenser. The dispenser for paper towels of Claim 1.

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