Roll paper holder

Abstract

The present invention provides a roll paper holder that automatically rotates the roll paper 5 after use, increasing the length and reducing the weight of the tab that is unwound from the front edge of the cover body 4 for the next use. [Solution] A plate cam 11 and a guide plate 12 are mounted on the rotating shaft 6 so as to be able to rotate together. A guide pin 14 is attached to the guide plate 12 near its most protruding portion 121, which can engage with a receiving portion 27. A mounting body 19 extending above the follower shaft 17 is provided with a receiving portion 27 and an operating rod 26, and a torsion spring 24 is attached between the mounting body 19 and the inner side wall 301. A cantilever spring 32 made of wire is attached to the circumferential side wall 303. The free end of the cantilever spring 32 is positioned in the guide groove 13.

Description

Technical Field

[0001] The present invention relates to a roll paper holder such that after a user cuts the roll paper, the roll paper automatically rotates a certain amount in the forward direction, a paper of a certain length is automatically fed out from the front edge of the cover body, and the fed-out paper serves as a picking margin for the next use.

Background Art

[0002] Conventionally, when cutting roll paper such as toilet paper, one hand holds the roll paper with the drawn-out edge hanging down through a cover body, and the other hand strongly pulls the drawn-out roll paper forward and cuts it at the front edge of the cover body. When the user's fingers come into contact with the cover body, dirt, viruses, bacteria, etc. adhering to the user's fingers adhere to the cover body, and these bacteria, etc. adhere to the fingers of the next user through the cover body, which is unclean. In addition, there is a drawback that it may be painful for women with decorated nails. In particular, in recent years when infectious diseases occur frequently, it is necessary to install a non-contact type roll paper holder that can cut toilet paper without contacting equipment.

[0003] The inventor of the present application has fixedly attached an eccentric plate or a weight to the rotating shaft, and after cutting the roll paper, the rotating shaft released from the pulling force of the roll paper rotates with the gravity acting on the eccentric plate or the weight, with the axis of the rotating shaft as the acting point, so that the center of gravity of the eccentric plate or the weight is located directly below the axis of the rotating shaft, and has created a roll paper holder that automatically feeds out a roll paper with a length equal to the rotational momentum of this rotating shaft (see, for example, Patent Documents 1, 2, 3, or 4).

[0004] However, the amount of paper dispensed after cutting the roll paper is approximately 1 / 4 of a rotation of the roll paper in the cases disclosed in Patent Documents 1 to 3, and even less in the case disclosed in Patent Document 4, approximately 1 / 8 of a rotation. This presented a problem in that, as the number of turns of the roll paper decreased, it became impossible to dispense a sufficient amount for picking unless the roll paper was manually rotated. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent Publication No. 6429007 [Patent Document 2] Patent Publication No. 6856834 [Patent Document 3] Patent Publication No. 7209160 [Patent Document 4] Japanese Patent Publication No. 2023-119541 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The present invention aims to provide a toilet paper holder that reduces the number of parts and weight, improves the stopping force of the rotating shaft when the paper is pulled out, shortens the recovery time to the initial state that occurs simultaneously with the cutting of the roll paper, and makes the tab that is dispensed from the front edge of the cover body longer. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides a roll paper holder in which a rotating shaft is rotatably mounted between a side member and the inner side wall of the casing, a cantilever spring is attached to the casing, a plate cam and an eccentric guide plate are attached to the other end of the rotating shaft within the casing so as to be synchronously rotatable, a guide groove into which a cantilever spring is disposed is recessed in the circumferential end surface of the guide plate, and means are provided to convert the rotational motion of the rotating shaft into the vertical motion of a follower shaft and rotate or stop the rotating shaft, The guide plate is designed such that, when viewed from the side, the straight line extending from the center of gravity of the guide plate in the rotational direction to the axis of rotation intersects the periphery of the guide plate, and from the point where this extension intersects the periphery of the guide plate to the most protruding part, the bottom of the guide groove presses against the cantilever spring, causing elastic deformation. The straight line distance from the axis of rotation to the periphery is set to gradually increase in this range, while from the most protruding part to the point where the extension of the straight line extending from the center of gravity of the guide plate to the axis of rotation intersects the periphery of the guide plate, the bottom of the guide groove is set to press against the cantilever spring, and the straight line distance between the axis of rotation and the periphery is set to be short. Near the most protruding part, a guide pin is attached in a position parallel to the axis of rotation. The follower shaft is fitted with a receiving part and an operating rod. The torsion spring is designed to store energy that elastically deforms as the follower shaft rises, thereby biasing the follower shaft downwards. The guide pin and the receiving part engage, and the cantilever spring is elastically deformed at the bottom of the guide groove at the most protruding part, and the cantilever spring presses against the bottom of the guide groove, thereby stopping the rotational movement of the guide plate. The mechanism is characterized by the fact that, simultaneously with the cutting of the roll paper, a force acting forward so that the center of gravity of the guide plate is positioned perpendicular to the axis of rotation, the restoring force of a cantilever spring that is compressed and elastically deformed at the bottom of the guide groove, and the restoring force of a torsion spring that is elastically deformed by the rising of the follower shaft cause the guide plate to rotate forward, and the roll paper is dispensed according to the amount of rotation. [Effects of the Invention]

[0008] The configuration, in which the restoring force of multiple springs acts to rotate the guide plate in the forward direction, shortens the time required to dispense the roll paper after it has been cut. Since the guide pin is located near the most protruding part of the guide board, the amount of rotation of the guide board increases from the stopped state to the point where the center of gravity of the guide board is hanging down when the guide pin engages with the receiving part, resulting in the effect of extending the amount of roll paper dispensed. Having fewer parts allows for weight reduction, which is a significant advantage. [Brief explanation of the drawing]

[0009] [Figure 1] This is a partially cutaway front explanatory diagram showing the cover in its open state in its initial condition before use. (Example 1) [Figure 2] This is an explanatory diagram showing the internal structure of the casing in its initial state before use. (Example 1) [Figure 3] This is a perspective view illustrating the inside of the casing, excluding the guide plate, in its initial state before use. (Example 1) [Figure 4] This is an explanatory diagram showing the positional relationship of the plate cam, follower shaft, spring, etc., as viewed from the outer surface of the inner side wall before the roll paper is pulled out. (Example 1) [Figure 5] This is a side view illustrating the inside of the casing when the roll paper is being pulled out. (Example 1) [Figure 6] This is an explanatory diagram showing the positional relationship of the plate cam, follower shaft, spring, etc., as viewed from the outer surface of the inner side wall when the roll paper is being pulled out. (Example 1) [Figure 7] This is a side view illustrating the inside of the casing in a state where the roll paper is continuously pulled out and the roll paper is free-spinning relative to the rotation axis. (Example 1) [Figure 8] This is an explanatory diagram showing the positional relationship of the plate cam, follower shaft, spring, etc., as viewed from the outer surface of the inner side wall, when the roll paper is continuously pulled out and the roll paper is free-spinning relative to the rotation axis. (Example 1) [Modes for carrying out the invention]

[0010] By setting the position where the guide pin is attached near the most protruding part of the guide plate and providing the center of gravity of the guide plate on the front side of the most protruding part and the guide pin, it has become possible to make the length of the paper automatically fed out after cutting the roll paper even longer. By raising the slave shaft, the torsion spring is elastically deformed to have accumulated energy, thereby realizing an even greater force acting on the guide plate in the rotational direction.

Example

[0011] Example 1 will be described based on the drawings. The roll paper holder includes a back member 1, a side member 2, a casing 3, a cover body 4 having a paper cutting function that undulates above the space surrounded by the side member 2, the casing 3, and the back member 1, a rotating shaft 6, 7 that is rotatably mounted between the side member 2 and the inner side wall 301 of the casing 3 and to which a roll paper 5 is attached, and means for rotating or stopping the rotating shafts 6, 7. The side member 2 is pivotally attached to one side edge in the lateral width direction of the back member 1 so as to be rotatable within a range of an angle of 90 degrees to 180 degrees with respect to the front of the back member 1. The side member 2 has a receiving hole 8 that opens on the inner surface, and one end of the rotating shaft 7 is rotatably supported in the receiving hole 8. The back member 1 and the side member 2 are provided with means (not shown) for biasing the side member 2 so that it can be restored to a positional relationship at an angle of approximately 90 degrees with respect to the back member 1, so that the side member 2 stably holds an angle of 90 degrees with respect to the front wall surface of the back member 1. The casing 3 is fixedly attached to the other side edge in the lateral direction of the back member 1 so as to protrude forward. The casing 3 is composed of an inner side wall 301, an outer side wall 302, and a peripheral side wall 303. The inner side wall 301 and the outer side wall 302 are disposed at a distance from each other in opposing positions, and the inner side wall 301 and the outer side wall 302 are integrally connected via the peripheral side wall 303, forming a space portion large enough to accommodate the rotation stop mechanism of the rotating shaft 6. The back member 1 is made of a rectangular plate-like object of the same thickness, and is provided with means for attaching to a building wall surface such as a toilet room.

[0012] The rotating shaft 6 is rotatably mounted through the inner side wall 301. One end of the rotating shaft 6 is formed as a male thread, and the other end of the rotating shaft 7 is formed as a female thread with a helical groove engraved on its inner surface. The rotating shafts 6 and 7 are screwed together to form a single rotating shaft. Paper tube mounting bodies 9 are arranged on the outside of the rotating shaft 7 so that their respective axes are coaxial. The outer surface of the paper tube mounting body 9 is provided with a protruding portion 10 that projects radially outward and extends from one end to the other.

[0013] In the inner space of the casing 3, a plate cam 11 and a guide plate 12 are attached to the other end of a rotating shaft 6 that is rotatably mounted on the inner side wall 301 of the casing 3, so as to be able to rotate together. The guide plate 12 is made of a predetermined thickness of flat plate and is formed into a deformed circle with a curved trajectory at its periphery that changes when viewed from the side. A guide groove 13 is recessed in the circumferential end surface of the guide plate 12. A guide pin 14 is provided on the guide plate 12 near the most outwardly protruding portion 121 of its periphery. The guide pin 14 is provided on the front side (forward side) in the rotational direction of the position at the longest shortest straight distance between the axis of the rotating shaft 6 and the periphery of the guide plate 12, which is the most outwardly protruding portion 121 of the guide plate 12. The tip of the guide pin 14 faces the inner side wall 301 and is positioned parallel to the rotating shaft 6. The guide plate 12 has a short length from the point where the line connecting the center of gravity of the guide plate 12 and the axis of the rotation axis 6 intersects with the periphery of the guide plate 12, extending to the most protruding part 121, so that the guide groove 13 is not pressed against by the cantilever spring 32, which will be described later. Furthermore, a weight 15 is attached to the guide plate 12 such that the central angle between the line connecting the mounting position of the guide pin 14 and the axis of the rotation axis 6, and the line connecting the center of gravity of the guide plate 12 and the axis of the rotation axis 6, is less than 180°. Preferably, the central angle is about 90°. In Embodiment 1, an example was described in which the weight 15 was attached with the center of gravity of the guide plate 12 significantly eccentric in order to quickly restore the guide plate 12 to its initial state, but the present invention is not limited to this. It also includes a case in which the distance of the guide plate 12 from the rotation axis 6 is significantly increased by protruding outward, and the center of gravity of the guide plate 12 is positioned in this protruding portion area.

[0014] The guide plate 12 sets a shorter shortest straight-line distance connecting the axis of the rotation shaft 6 and the periphery of the guide plate 12 within a predetermined range on the rear side (back side) in the rotation direction from the position of the most protruding portion 121. Specifically, from the most protruding portion 121 to the rear side (back side) in the rotation direction of the guide plate 12, the range up to the position where the extension line of the line connecting the center of gravity of the guide plate 12 and the axis of the rotation shaft 6 intersects the periphery of the guide plate 12 is set such that the shortest straight-line distance connecting the axis of the rotation shaft 6 and the periphery of the guide plate 12 is shorter than that of other peripheries. That is, the periphery of the guide plate 12 shortens the straight-line distance between the axis of the rotation shaft 6 and the periphery from the position of the most protruding portion 121 to the rear side (back side) in the rotation direction, up to the position where the extension line of the line connecting the center of gravity of the guide plate 12 and the axis of the rotation shaft 6 intersects the periphery of the guide plate 12, and is formed such that the straight-line distance between the axis of the rotation shaft 6 and the periphery gradually increases from the position where the extension line of the line connecting the center of gravity of the guide plate 12 and the axis of the rotation shaft 6 intersects the periphery of the guide plate 12 to the most protruding portion 121.

[0015] Above the plate cam 11, a follower shaft 17 that converts the rotational motion of the plate cam 11 into vertical motion is disposed. The follower shaft 17 is provided with a contact 18 at the lower end. At the upper end of the follower shaft 17, a mounting body 19 extending upward is continuously provided. The mounting body 19 has sliding pieces 20, 20 projecting in the direction of the circumferential side wall 303 at the upper end of a substantially prismatic main body that is long in the vertical direction, and a flat mounting base portion 25 projecting in the direction of the outer side wall 302 with a positional relationship of 90° with respect to the axis of the follower shaft 17 is continuously provided at the lower end. The support portion 21 is fixed to the side wall 301 at an angle of 90° with respect to the axis of the follower shaft 17, and a hole through which the follower shaft 17 slides is provided penetrating in the vertical direction. On the side wall 301, support bodies 22, 22 having sliding grooves recessed at opposed positions are fixed, and the sliding pieces 20, 20 are disposed slidably in the vertical direction in the sliding grooves. A mounting piece 23 is fixed to the inner side wall 301. The upper end of a torsion spring 24 twisted in a U shape is fixed to the mounting piece 23, and the lower end is fixed to the mounting body 19, biasing the mounting body 19 downward to lower the follower shaft 17 and the contact 18. [[ID={6}]]

[0016] A tip 28, which has an operating rod 26 with its tip facing forward at a 90° positional relationship with the follower shaft 17, and a receiving portion 27 facing backward, is attached to the upper surface of the mounting base portion 25 by a support member 29. The support member 29 has a shock-absorbing function, and as a specific example, it is made of a metal wire having an annular portion in the middle. One end of a cantilever spring 30 made of a thin plate spring is attached to the inner side wall 301. The free end of the cantilever spring 30 made of a thin plate spring is positioned directly below the tip of the operating rod 26.

[0017] The fixed end of a cantilever spring 32, which is made of wire, is fixedly attached to the circumferential side wall 302. The cantilever spring 32 has a bent portion, which is located within the guide groove 13.

[0018] Let's explain the operation. Open the side member 2, insert the paper tube mounting body 9 into the hollow core of the roll paper 5, and attach the roll paper 5. In the initial state before use, as shown in Figures 1 to 4, the center of gravity of the guide plate 12 is located perpendicular to the axis of the rotation axis 6, and the most protruding part 121 is stationary facing forward. Due to the elastic restoring force of the V-shaped torsion spring 24, the central angle of the torsion spring 24 becomes large, and the lower end of the torsion spring 24 moves downward, causing the mounting body 19 and contactor 18 to also descend. The tip of the operating rod 26 is stationary in contact with the upper surface of the free end of the cantilever spring 30, which is made of a thin plate spring.

[0019] Referring to Figures 5 and 6, the operation of the roll paper holder while the user is dispensing the roll paper 5 will be explained. When the user pulls out the tab of the roll paper 5 towards the front, the rotation shafts 6 and 7 begin to rotate in the forward direction due to the user's paper-pulling force. Along with the rotation of the rotation shaft 6, the guide plate 12 also rotates in the forward direction. In accordance with the forward rotation of the guide plate 12, the weight 15 moves from directly below the rotation shaft 6 to the rear side, then directly above, and finally to the front side, centered on the rotation shaft 6. The plate cam 11 also rotates synchronously with the guide plate 12 in the forward direction, and the most protruding part of the periphery of the plate cam 11 pushes up the contact 18, causing the sliding pieces 20, 20 to slide within the sliding grooves of the support bodies 22, 22, and the mounting body 19 rises. Simultaneously with the rise of the mounting body 19, the lower end of the torsion spring 24 also rises, the central angle of the torsion spring 24 becomes smaller, and energy is stored in the torsion spring 24. The operating rod 26 also moves parallel upward from the cantilever spring 30, which is made of a thin plate spring. As the center of gravity of the guide plate 12 moves from directly above the rotation axis 6 to the front, the guide pin 14 engages with the receiving part 27, and the guide plate 12 stops its rotational movement. Due to the rotational movement of the guide plate 14 around the front, the bent portion of the cantilever spring 32, which is made of wire, is pressurized as the straight-line distance between the groove bottom of the guide groove 13 that it contacts and the rotation axis 6 increases, and it gradually rises, becoming most elastically deformed at the position of the most protruding part 121. The force acting in the forward direction due to the operation of unwinding the roll paper 5, the force lifting the contact element 18 at the most protruding part of the plate cam 11, the elastic restoring force of the cantilever spring 32, and the engagement of the guide pin 14 with the receiving part 27 hold the guide plate 12 in a stopped state. With the guide plate 12 in a stopped state, the user then unwinds the desired amount of paper. With the rotating shafts 6 and 7 stationary, the paper tube mounting body 9 rotates freely on the rotating shaft 7 and moves forward together with the roll paper 5. A force acts from the bent portion of the cantilever spring 32 to the bottom of the guide groove 13, pressing the guide plate 12 in the forward direction.

[0020] When the unwound roll of paper 5 is cut, the rotating shafts 6 and 7 are released from the paper pulling force. The guide plate 12 rotates forward so that its center of gravity is directly below the rotating shaft 6, and at the same time, the restoring force of the cantilever spring 32 is applied from the bent portion 321 to the bottom of the guide groove 13, increasing the rotational force. Due to the restoring force of the torsion spring 24, the mounting body 19 descends, and the guide pin 14 detaches from the receiving portion 27. Simultaneously, the contact element 18 descends and acts to rotate the most protruding part of the plate cam 11 forward. As shown in Figure 8, as the mounting body 19 descends, the operating rod 26 presses down on the free end of the cantilever spring 30, which is made of a thin plate spring, from above, acting as a stopper to prevent the mounting body 19 from descending beyond a certain amount, resulting in the initial state shown in Figures 1 to 4.

[0021] Because the guide pin is positioned between the center of gravity and the most protruding part of the guide plate, the rotation angle of the rotation axis required to return from the stopped state to the initial state is large, and as a result, the length of paper automatically dispensed after the roll paper 5 is cut becomes even longer.

[0022] After the user cuts the roll paper 5, the operating rod 26 acts on the cantilever spring 30, which is made of a thin plate spring, thereby reducing the impact when it returns to its original position. [Explanation of Symbols]

[0023] 1. Rear component 2 Side members 3. Casing 4 Cover body 5 roll paper 6, 7 Rotation axis 11 plate cam 12 Information board 13 Guide groove 14 Guide pins 15 weights 17 Follower shaft 24 Torsion spring 26 Operating rod 27 Receiving part 30. Cantilever spring made of thin sheet metal 32 Cantilever spring

Claims

[Claim 1] In a roll paper holder, a rotating shaft is rotatably mounted between a side member and the inner side wall of the casing, a cantilever spring is attached to the casing, a plate cam and an eccentric guide plate are attached to the other end of the rotating shaft within the casing so as to be synchronously rotatable, a guide groove into which the cantilever spring is disposed is recessed in the circumferential end surface of the guide plate, and a means is provided to convert the rotational motion of the rotating shaft into the vertical motion of a follower shaft to rotate or stop the rotating shaft, The guide plate is designed such that, when viewed from the side, the straight line extending from the center of gravity of the guide plate in the rotational direction to the axis of rotation intersects the periphery of the guide plate, and from the point where this extension intersects the periphery of the guide plate to the most protruding part, the bottom of the guide groove presses against the cantilever spring, causing elastic deformation. The straight line distance from the axis of rotation to the periphery is set to gradually increase in this range, while from the most protruding part to the point where the extension of the straight line extending from the center of gravity of the guide plate to the axis of rotation intersects the periphery of the guide plate, the bottom of the guide groove is set to press against the cantilever spring, and the straight line distance between the axis of rotation and the periphery is set to be short. Near the most protruding part, a guide pin is attached in a position parallel to the axis of rotation. The follower shaft is fitted with a receiving part and an operating rod. The torsion spring is designed to store energy that elastically deforms as the follower shaft rises, thereby biasing the follower shaft downwards. The guide pin and the receiving part engage, and the cantilever spring is elastically deformed at the bottom of the guide groove at the most protruding part, and the cantilever spring presses against the bottom of the guide groove, thereby stopping the rotational movement of the guide plate. A roll paper holder that, simultaneously with the cutting of the roll paper, rotates the guide plate forward using a force acting forward so that the center of gravity of the guide plate is perpendicular to the axis of rotation, the restoring force of a cantilever spring that is compressed and elastically deformed at the bottom of the guide groove, and the restoring force of a torsion spring that is elastically deformed by the rising of the follower shaft, thereby dispensing a roll of paper according to the amount of rotation.

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