JPH0514870Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a page-turning device, specifically a page-turning device that can automatically turn bound musical scores, books, and other books while playing or reading. Regarding improvements.

(Prior Art) As a conventional page turning device, that is, a device for automatically turning the pages of a book, the score of a musical score, etc., there is known a device disclosed in, for example, Japanese Patent Laid-Open No. 60-204398.

This device consists of a rotating shaft that has a pusher and a lever that are inserted between pages to turn the page, a spring that gives this rotating shaft the ability to rotate in the page-turning direction, and a spring that locks the lever and rotates it. a lock mechanism that prevents rotation of the moving shaft by the spring; a solenoid that releases the locked state of the lever caused by the lock mechanism;
It is equipped with the following.

Therefore, according to this device, the rotating shaft provided with the presser inserted between the pages is locked by the locking mechanism,
The locked state is released by a solenoid, and the rotation shaft is rotated in the page turning direction by the force of a spring.

As a result, in this device, when the locked state is released by the solenoid, the rotation shaft attempts to rotate due to the force of the spring, and a constant large force is always applied to the page in the turning direction through the presser and lever. It had become commonplace. With this, there is a problem that the page may be torn if an excessive force is applied in the opposite direction to the turning direction during the page turning operation.

Therefore, in order to solve this problem, the applicant of this application,
In a previously filed patent application, a rolling contact surface is formed at the rear end of an arm that grips a page at its tip, and a driving body is brought into contact with this rolling contact surface to rotate the arm to turn the page. provided a page turning device with

(Problems to be Solved by the Invention) However, even with the page turning device according to the prior application, the following problems occurred.

That is, the center of rotation of the musical score or the like when turning pages is different for each page, and the center of rotation of the arm in that case is located eccentrically from those rotation centers. Moreover, the arm firmly gripped each page with a clip at its tip. As a result, during the page turning operation, an excessive compressive force is applied in the direction of the page due to the force (elastic force of the paper) in the direction in which the page extends due to the difference in the length of the turning radius, causing the page to be turned to sit. A bending phenomenon occurred.

Due to this buckling phenomenon, the page to be turned is pressed tightly against the next page, and together with the large negative pressure that acts between these pages during the turning operation, a large resistance is created in the opposite direction to the page turning direction. Power was inevitable. As a result, when a page is pressed against the next page due to the buckling phenomenon, the page cannot be turned, resulting in an inaccurate page-turning operation as a whole.

(Means for solving the problem) Therefore, this invention consists of a plurality of rotatable arms and a device attached to each downwardly bent end of each arm to read each page of a book. In a page turning device having a fixture for hanging and gripping each page, the center of rotation of the arm is provided eccentrically with respect to the center of rotation of each page of the book, in which the center of rotation of the arm is provided eccentrically with respect to the center of rotation of each page of the book. , a reducing means is provided to reduce the resistance force against rotation that occurs based on the difference in length between the rotation radius of each page and the rotation radius of the arm.

(Operations and Effects) In the page turning device according to the present invention, the center of rotation of the arm is provided eccentrically with respect to the center of rotation of the page. As a result, during page turning, the
There is a difference between the radius of rotation of the arm and the radius of rotation of the page. Based on this difference, a resistance force is generated against rotation of the fixture and the arm. However, this drag force can be reduced by means of mitigation measures. This is effective as a countermeasure against buckling deformation in the direction around the rotation axis of the page. As a result, the page turning operation can be performed smoothly. Furthermore, since the fixture only hangs and grips the page, the weight of the arm and fixture does not affect the page. Therefore, pages will not be damaged.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 to 3 show an embodiment of a page turning device according to the present invention.

In FIG. 1, reference numeral 1 denotes a plurality of arms, and each of these arms 1 is rotatably provided around a single rotation shaft 2. As shown in FIG. These arms 1 are formed into a substantially L-shape, and have a horizontal portion 1A.
A finger 3 as a fixture is attached to the tip (lower end) of the vertical portion 1B that is bent downward by approximately 90°. Specifically, these fingers 3 are each attached to the lower end of the vertical portion 1B of the arm 1 via a rotatable joint 4, and as a result, each finger 3 is supported rotatably around the axis of the vertical portion 1B. There is. Further, each finger 3 is constituted by, for example, a clip for gripping each page of a bound book.

As shown in FIG. 2, the book 6 placed on the mounting table 5 is closed at one end and opened from the other end (it is rotatable around the one end). Here, the page turning device is installed behind this mounting table 5. As a result,
The rotation shaft 2 (the rotation center of the arm 1) is eccentrically provided with respect to the rotation center of each page 7 (one end of the book 6). Each of the fingers 3 grips the other end of each page 7, respectively. As a result, the length of the rotation radius of each arm 1 is longer than the length of the rotation radius of each page 7.

FIG. 3 shows the rotatable joint 4. As shown in the figure, a hole 1 is provided at the lower end of the vertical part 1B of the arm 1.
1 is opened downward, and the upper end of a support shaft 12 that supports the finger 3 is pushed into the hole 11 and inserted loosely. Note that the entrance portion of the hole 11 is narrower than the inner portion. It is a stopper. Further, a slit or the like may be formed in this entrance portion to facilitate pushing. This rotatable joint 4 as a whole has a reducing means for reducing the resistance force (resistance force against the rotation of the page 7) generated based on the difference between the rotation radius of each page 7 and the rotation radius of the arm 1. It consists of

Next, the effect will be explained.

In this embodiment, when the arm 1 is rotated in the clockwise direction in FIG. 2 about the rotation axis 2 by a drive means (not shown), the finger 3 is gripping the page 7, so that the page 7 is rotated. 7 also rotates clockwise in FIG. In other words, page 7 is turned over.

In this case, as shown in the figure, the position of the arm 1 at the beginning of turning is shown by a solid line, and the position in the middle of turning is shown by a broken line, and point A is the page 7 of the finger 3 at the beginning of turning. Point B indicates the gripping position when the sheet is being gripped, and point B represents the gripping position in the middle of turning over. Further, the finger 3 forms an initial angle α with respect to the page 7.

In the turning operation, when arm 1 is rotated by an angle θ, the rotation radii of arm 1 and page 7 are different, and since the radius of rotation of page 7 is shorter, the paper surface of page 7 has a curve in its radial direction. Compressive force acts. As a result, during the turning operation, the page 7 undergoes buckling deformation as shown by the broken line B1 or B2 in the figure.
In this case, if the arm 1 and the page 7 to be turned are always fixed at the initial angle α as in the past, the page 7 is likely to undergo deformation of B1 (also, due to higher-order modes such as secondary modes). deformation may occur),
Moreover, the compressive force increases. Therefore, together with the negative pressure between the pages, page 7 becomes difficult to turn.

However, in this embodiment, as mentioned above, the finger 3 is connected to the joint 4 with respect to the arm 1.
Since it is rotatably attached via the arm 1, the paper surface is not constrained to the initial angle α with respect to the arm 1 at the point B where the page 7 is gripped. That is, the deformation of the state B2 of page 7 described above becomes easy, and an excessive compressive force is not applied to the paper surface in the radial direction (this deformation B2 generates almost no resistance force against the turning operation). Further, even if the deformation B1 occurs, as shown in the figure, the page 7 is not constrained to the initial angle α with respect to the arm 1, so that no excessive compressive force is applied. As a result, even if a buckling phenomenon occurs during the turning operation of page 7, it is only buckling in the first mode, and no excessive resistance force is generated in the opposite direction to the turning direction, and the turning operation is extremely smooth. It will be held on.

4 and 5 show other embodiments of the invention.

In this embodiment, in addition to disposing a rotary joint 4 between the finger 3, which is a fixture, and the arm 1,
A slide mechanism is provided between these.

That is, the arm vertical part 1B and the finger 3 are integrally supported by the arm horizontal part 1A so as to be slidable in the axial direction of the horizontal part 1A. Specifically, an axial dovetail groove 21 is formed in the horizontal portion 1A,
The structure is such that the upper part 4A of the joint 4 is slidably inserted into this dovetail groove 21. Note that 22 in FIG. 4 is a spring that biases the upper part 4A of the joint toward the tip of the horizontal portion 1A. These rotary joints 4
The slide mechanism as a whole constitutes a reducing means.

As a result, the difference in radius length is absorbed by the sliding of the joint 4A within the dovetail groove 21 during the page turning operation. Therefore, no buckling phenomenon occurs during the turning operation. Therefore, in this example,
While firmly grasping page 7 with finger 3,
You can turn the pages extremely smoothly even with a small amount of force. Additionally, each page can be quickly turned over.

The other configurations and operations are the same as those in the above embodiment, and will therefore be omitted.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of an arm showing an embodiment of a page turning device according to the present invention, FIG. 2 is a plan view illustrating a page turning operation according to the embodiment, and FIG. FIG. 4 is a partial sectional view showing the structure of the rotary joint according to the same embodiment, FIG. 4 is a partial sectional view of the slide mechanism showing another embodiment of the present invention, and FIG. It is an arrow sectional view. 1...Arm, 3...Finger (fixing device),
4...Rotating universal joint (reduction means).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of rotatably provided arms, each of which is attached to the downwardly bent end of each arm to suspend and grasp each page of a book. In the page turning device, the rotation center of the arm is provided eccentrically with respect to the rotation center of each page of the book, and the rotation center of the arm is provided eccentrically with respect to the rotation center of each page of the book. A page turning device characterized by being provided with a reducing means for reducing the resistance force against rotation generated based on the difference in length between the radius of motion and the radius of rotation of the arm. (2) The above-mentioned mitigation means is the first utility model registration claim in which the fixture is rotatably connected to the arm.
Page-turning device as described in section. (3) The page turning device according to claim 1, wherein the reducing means includes a fixture that is slidably held on the arm.