WO2019167167A1

WO2019167167A1 - Placement table

Info

Publication number: WO2019167167A1
Application number: PCT/JP2018/007487
Authority: WO
Inventors: 英之奥村; 暁岩山
Original assignee: 株式会社Pfu
Priority date: 2018-02-28
Filing date: 2018-02-28
Publication date: 2019-09-06

Abstract

A placement table (1) is provided with a right placement section (7), a right sliding shaft (23), a right elastic section (40), and a right link mechanism (21). The right sliding shaft (23) is supported by the placement table body (6) so as to be capable of translating in a sliding direction (27). The right elastic section (40) imparts an elastic force to the right sliding shaft (23), the elastic force moving the right sliding shaft (23) in the sliding direction (27) relative to the placement table body (6). The right link mechanism (21) converts the elastic force into a lifting force which moves the right placement section (7) in a top-bottom direction (30) different from the sliding direction (27). The right link mechanism (21) is formed so that a conversion ratio obtained by dividing the magnitude of the lifting force by the magnitude of the elastic force decreases as the amount of downward movement of the right placement section (7) against the lifting force increases.

Description

Mounting table

The technology of the present disclosure relates to a mounting table.

2. Description of the Related Art An overhead type image reading apparatus that reads an image of a binding medium while turning the binding medium without separating the binding medium is known. Such an image reading apparatus includes a mounting table on which a binding medium is placed, a pressing plate that presses the binding medium, and a reading unit that reads an image on a reading surface pressed by the pressing plate of the binding medium. Yes. The mounting table is formed so as to be movable up and down, and is lowered when the binding medium is pressed by the pressing plate, so that the reading surface of the binding medium can be appropriately arranged at a predetermined position with respect to the reading unit ( (See Patent Documents 1 to 3).

JP 07-128933 A Japanese Patent Laid-Open No. 01-125060 Japanese Utility Model Publication No. 62-159050

Such a mounting table is given a lifting force so that it rises to its original position when the pressing plate is not pressing the medium. However, there is a problem that such lifting force increases as the mounting table is lowered, making it difficult to operate the pressing plate.

The disclosed technology has been made in view of the above points, and an object of the present invention is to provide an image reading apparatus in which a lifting force for raising the mounting table is within a predetermined range.

In the disclosed aspect, the mounting table includes a mounting unit, a slide shaft supported by the mounting table main body so as to be capable of translational movement in the first direction, and the slide shaft is moved in the first direction with respect to the mounting table main body. An elastic portion for applying an elastic force to the slide shaft, and a link mechanism. The link mechanism converts the elastic force into a lifting force that moves the placement unit in a second direction different from the first direction. At this time, in the link mechanism, the conversion rate obtained by dividing the magnitude of the lifting force by the magnitude of the elastic force decreases as the amount of lowering that the mounting portion moves opposite to the lifting force increases. So that it is formed.

The disclosed mounting table can keep the lifting force for raising the mounting table within a predetermined range.

FIG. 1 is a perspective view illustrating an image reading apparatus provided with a mounting table according to the first embodiment. FIG. 2 is a perspective view illustrating the mounting table according to the first embodiment. FIG. 3 is a side sectional view showing the mounting table of the first embodiment. FIG. 4 is a plan view showing the mounting table of the first embodiment. FIG. 5 is a perspective view illustrating the mounting table of the first embodiment when the right mounting portion is pressed. FIG. 6 is a conceptual diagram showing a dynamic model of the right link mechanism. FIG. 7 is a graph showing the relationship between the crank angle and the conversion rate. FIG. 8 is a graph showing the relationship between the crank angle and the force that must be applied to the right slide shaft when the right mounting portion is raised. FIG. 9 is a graph showing the relationship between the lowering amount of the right mounting portion and the conversion rate, the relationship between the lowering amount and the elastic force, and the relationship between the lowering amount and the lifting force. FIG. 10 is a plan view illustrating the mounting table of the second embodiment. FIG. 11 is a plan view showing the mounting table of the third embodiment. FIG. 12 is a side sectional view showing the mounting table of the fourth embodiment. FIG. 13 is a perspective view illustrating the mounting table according to the fifth embodiment. FIG. 14 shows the relationship between the lowering amount of the right mounting portion of the mounting table of Example 5 and the conversion rate, shows the relationship between the lowering amount and the elastic force of the tension coil spring, and lifted by the lowering amount and the tension coil spring. It is a graph which shows the relationship with force. FIG. 15 shows the relationship between the lowering amount of the mounting table of Example 5 and the lifting force by the tension coil spring, shows the relationship between the lowering amount and the lifting force by the compression coil spring, and shows the relationship between the lowering amount and the lifting force. It is a graph to show.

Hereinafter, a mounting table according to an embodiment disclosed in the present application will be described with reference to the drawings. In addition, the technique of this indication is not limited by the following description. Moreover, in the following description, the same code | symbol is provided to the same component and the overlapping description is abbreviate | omitted.

[Image reading device]
FIG. 1 is a perspective view illustrating an image reading apparatus 10 provided with a mounting table 1 according to the first embodiment. As shown in FIG. 1, the image reading apparatus 10 includes a mounting table 1, a reading unit 2, and a reading unit holding unit 3. The mounting table 1 is mounted on the installation surface 5 on which the image reading device 10 is installed. The reading unit 2 is disposed above the mounting table 1. A part of the reading unit holding unit 3 is fixed to a part of the mounting table 1, and the other part is fixed to a part of the reading unit 2. That is, the reading unit 2 is supported by the reading unit holding unit 3 via the reading unit holding unit 3 so as to be disposed above the mounting table 1.

[Mounting table]
The mounting table 1 includes a mounting table main body 6, a right mounting unit 7, and a left mounting unit 8. The mounting table body 6 is formed in a box shape, and a storage space (not shown) is formed inside. The mounting table body 6 is mounted on the installation surface 5. The right mounting part 7 is formed in a plate shape, and a right mounting surface 11 is formed. The right mounting surface 11 is formed flat. The right mounting part 7 is arranged so that the right mounting surface 11 is along a plane parallel to the installation surface 5. The left mounting portion 8 is formed in a plate shape, and a left mounting surface 12 is formed. The left mounting surface 12 is formed flat. The left mounting portion 8 is arranged so that the left mounting surface 12 extends along a plane parallel to the installation surface 5.

The mounting table 1 includes a pressing plate portion 14. The pressing plate portion 14 is made of a material that transmits visible light, and has a flat plate shape. The holding plate portion 14 is disposed between the mounting table main body 6 and the reading unit 2 and is disposed along another plane parallel to the plane along which the right mounting surface 11 and the left mounting surface 12 are aligned. ing. The holding plate portion 14 is supported by the mounting table body 6 through the reading unit holding portion 3 so as to be capable of translational movement in the holding plate translational direction 15 so as to be disposed at the retracted position or the holding position. The pressing plate translational direction 15 is perpendicular to the direction in which the right placement portion 7 and the left placement portion 8 are arranged, is not parallel to the plane along the right placement surface 11 and the left placement surface 12, and is on the right side. It is slightly inclined with respect to a normal line extending along the mounting surface 11 and the left mounting surface 12. When the pressing plate portion 14 is disposed at the retracted position, the right plate portion 7 and the left plate portion 8 are separated from the medium placed on the right plate portion 7 or the left plate portion 8. Arranged at the top. When the pressing plate portion 14 is disposed at the pressing position, a surface of the medium placed on the right placement portion 7 or the left placement portion 8 that faces the reading portion 2 is disposed at a predetermined position. So that the medium is pressed downward. The presser plate part 14 is supported so as to be capable of translational movement, so that the presser plate part 14 is supported with respect to the slide direction 27 as compared with other presser plate parts supported so as to be able to rotate and move on a rotating shaft parallel to the slide direction 27. Easy to tilt.

FIG. 2 is a perspective view showing the mounting table 1 of the first embodiment. FIG. 3 is a side sectional view showing the mounting table 1 of the first embodiment. As shown in FIG. 2, the mounting table 1 includes a right link mechanism 21. The right link mechanism 21 is disposed below the right mounting portion 7 in the storage space formed by the mounting table main body 6, and includes a right slide shaft 23, a rear lower slide portion 24, and a front lower slide portion 25. It has. The right slide shaft 23 is formed in a rod shape and is arranged along a straight line parallel to the front-rear direction 26. The front-rear direction 26 is parallel to a plane along the right placement surface 11 of the right placement portion 7 and is perpendicular to the direction in which the right placement portion 7 and the left placement portion 8 are arranged.

The back side lower slide part 24 is arranged on the back side in the front-rear direction 26 in the lower part of the right side mounting part 7, and is fixed to the mounting base body 6. The back end of the right slide shaft 23 is supported by the mounting table body 6 so as to be capable of translational movement in the slide direction 27 via the back side lower slide portion 24. The sliding direction 27 is parallel to the plane along which the installation surface 5 is aligned, and is perpendicular to the front-rear direction 26. The back side lower slide part 24 further restricts the range in which the back side end of the right slide shaft 23 is disposed, and limits the range in which the back side end of the right slide shaft 23 moves in parallel to the slide direction 27. doing.

The near side lower slide part 25 is arranged on the near side of the lower part of the right side placing part 7 and is fixed to the placing table body 6. The front end of the right slide shaft 23 is supported by the mounting table body 6 via the front lower slide portion 25 so as to be able to translate in the slide direction 27. The near side lower slide part 25 further restricts the range in which the near end of the right slide shaft 23 is disposed, and restricts the range in which the near end of the right slide shaft 23 moves in parallel with the slide direction 27. doing.

The right link mechanism 21 further includes a back side first crank 31, a back side second crank 32, a back side upper slide part 33, a front side first crank 34, a front side second crank 35, and a front side upper slide part 36. I have. The back side first crank 31 is formed in a band shape, and is arranged on the back side of the lower part of the right side mounting portion 7. The back side first crank 31 has one end fixed to the back side end of the right slide shaft 23, and the other end at the back side portion of the right side mounting portion 7 so as to be rotatable around the rotation shaft 37. It is supported. The rotation shaft 37 is parallel to the front-rear direction 26.

The back side second crank 32 is formed in a belt shape and is arranged on the back side of the storage space of the mounting table main body 6. The back side upper slide part 33 is arranged on the back side of the lower part of the right side mounting part 7, and is fixed to the back side part of the right side mounting part 7. As shown in FIG. 3, the back side second crank 32 is supported by the mounting table body 6 so that one end thereof is rotatable about a rotation shaft 38, and the other end slides through the back side upper slide portion 33. It is supported by the back | inner side site | part of the right side mounting part 7 so that translation movement is possible in the direction 27. FIG. The back side second crank 32 is further supported at the center of the back side first crank 31 so that the center can rotate around the rotation shaft 39. The rotation shaft 39 is substantially parallel to the front-rear direction 26.

The front side first crank 34, the front side second crank 35, and the front side upper slide part 36 are formed in the same manner as the back side first crank 31, the back side second crank 32, and the back side upper slide part 33, respectively. Has been. That is, the front-side first crank 34 is formed in a band shape and is disposed on the front side of the lower portion of the right-side mounting portion 7. The front side first crank 34 has one end fixed to the front side end of the right slide shaft 23 and the other end rotatably disposed around the rotation shaft 37 on the front side portion of the right mounting portion 7. It is supported. The front-side second crank 35 is formed in a band shape and is disposed on the front side of the lower portion of the right-side mounting portion 7. The near-side upper slide part 36 is disposed on the near side of the lower part of the right side placing part 7 and is fixed to a near side part of the right side placing part 7. The front side second crank 35 is supported on the mounting table body 6 so that one end thereof can rotate about the rotation shaft 38 and the other end is placed on the right side so as to be able to translate in the sliding direction 27 via the front side upper slide part 36. The part 7 is supported by the front side part. The front-side second crank 35 is further supported at the center of the front-side first crank 34 so that the center can rotate about the rotation shaft 39.

The right mounting part 7 is supported by the mounting base body 6 so as to be able to translate in the vertical direction 30 via the right link mechanism 21 by forming the right link mechanism 21 in this way. The up-down direction 30 is perpendicular to the plane along which the installation surface 5 extends, that is, perpendicular to the sliding direction 27 and perpendicular to the rotation shaft 37 and the rotation shaft 38. At this time, the back side first crank 31 and the front side first crank 34 are fixed to the right slide shaft 23, so that the straight line along the back side first crank 31 and the straight line along the front side first crank 34 are aligned. And rotate around the rotary shaft 37 in synchronism with each other so as to maintain parallelism. For this reason, in the right link mechanism 21, the right mounting part 7 is inclined so that the height of the rear part of the right mounting part 7 and the front part of the right mounting part 7 are different. This can prevent the right mounting surface 11 from being inclined with respect to the installation surface 5.

The right link mechanism 21 further includes an upper limit restricting section 28 as shown in FIG. The upper limit restricting portion 28 is formed in a rod shape, is disposed at the lower portion of the right mounting portion 7 along a straight line parallel to the sliding direction 27, and is fixed to the mounting table body 6. The upper limit restricting portion 28 is disposed so that one end of the upper limit restricting portion 28 abuts against the right slide shaft 23 when the right slide shaft 23 moves toward the center side in the slide direction 27. The upper limit restricting unit 28 restricts the range in which the right slide shaft 23 is disposed and the range in which the right slide shaft 23 moves in parallel with the slide direction 27 by having one end abutting against the right slide shaft 23. The right link mechanism 21 restricts the right placement unit 7 from moving above a predetermined upper limit by restricting the range in which the right slide shaft 23 moves by the upper limit restricting unit 28. Arrangement above the predetermined upper limit is restricted.

FIG. 4 is a plan view showing the mounting table 1 of the first embodiment. The mounting table 1 includes a right elastic portion 40 as shown in FIG. The right elastic part 40 includes an adjustment mechanism 41 and a plurality of springs 42. The adjustment mechanism 41 includes a spring hooking portion 43 and a plurality of fixing portions 44. The spring hook portion 43 is formed in a plate shape, and a plurality of spring through holes 45 and a plurality of fixing grooves 46 are formed. The plurality of fixing portions 44 are formed of bolts, pass through the plurality of fixing grooves 46, and are fastened to a female screw formed on a base frame 47 fixed to the mounting table body 6, so that the spring hooking portion 43 is formed. Fix to the mounting table body 6.

Each of the plurality of springs 42 is formed of a metal that is an elastic body, and is formed as a tension coil spring. Each of the plurality of springs 42 has a first hook 48 formed at one end and a second hook 49 formed at the other end. Each of the plurality of springs 42 is disposed at the lower part of the right mounting portion 7 so as to be along a straight line parallel to the sliding direction 27. One end of each of the plurality of springs 42 is supported on the right slide shaft 23 by the first hook 48 being hooked on the right slide shaft 23. The plurality of springs 42 are supported on the mounting table body 6 indirectly via the adjustment mechanism 41 by the second hooks 49 being hooked into the plurality of spring through holes 45 of the spring hooking portion 43. . The plurality of springs 42 are supported by the right slide shaft 23 and the mounting table body 6 at both ends, respectively, so that the elastic force is applied to the right side so that the right slide shaft 23 moves toward the center with respect to the mounting table body 6. This is given to the slide shaft 23.

The right link mechanism 21 further includes a lower limit restricting unit (not shown). The lower limit restricting portion is disposed so as to abut against the right placing portion 7 when the right placing portion 7 moves downward in parallel with the vertical direction 30, and is fixed to the placing table main body 6. The lower limit restricting unit restricts the right mounting unit 7 from moving below a predetermined lower limit by striking the right mounting unit 7, and the right mounting unit 7 is disposed below the predetermined lower limit. To restrict.

FIG. 5 is a perspective view showing the mounting table 1 of Example 1 when the right mounting part 7 is pressed. The right-side mounting portion 7 is supported by the right-side link mechanism 21 so as to be capable of translational movement in the up-down direction 30, so that the right-side placement portion 7 descends when pushed downward, as shown in FIG. 5. It is arranged at a position lower than the position where it was arranged when it was not pushed downward. The right slide shaft 23 slides in the sliding direction when the back side first crank 31 and the front side first crank 34 of the right link mechanism 21 rotate around the rotation shaft 37 when the right mounting portion 7 descends. Translate parallel to 27 and outward. The upper limit restrictor 28 moves away from the right slide shaft 23 when the right slide shaft 23 translates outward. The plurality of springs 42 are elastically deformed so that the length is increased when the right slide shaft 23 translates outward, and an elastic force is applied to the right slide shaft 23 so that the right slide shaft 23 translates toward the center. give.

FIG. 6 is a conceptual diagram showing a dynamic model of the right link mechanism 21. As shown in FIG. 6, the magnitude of the pressing force F ₁ that presses the right mounting portion 7 downward is the force by which a point that overlaps the rotating shaft 37 in the back side first crank 31 is pressed downward. Is equal to the size of The back side first crank 31 is fixed to the right slide shaft 23 of the back side first crank 31 as a reaction of a force that pushes a point that overlaps the rotation shaft 37 of the back side first crank 31 downward. A force that pushes the point upward is applied from the right slide shaft 23. When the right mounting portion 7 is pushed down side pressing force F _1, pushed force upwards that is fixed to the right slide shaft 23 from the right slide shaft 23 of the rear-side first crank 31 the size of the is equal to the magnitude of the pressing force F _1.

Elastic force F ₃ provided by a plurality of springs 42 to the right slide shaft 23 is equal to the force that is fixed to the right slide shaft 23 of the rear-side first crank 31 is pulled toward the center. When the elastic force F ₃ opposes the pressing force F ₁ , the moment of the force that causes the pressing force F ₁ to rotate the back side first crank 31 around the rotation shaft 37 is that the elastic force F ₃ is centered on the rotation shaft 37. The moment of force for rotating the back side first crank 31 is balanced. For this reason, the following equation is established by using the height H, the width W, and the crank angle θ.
F ₃ × H = F ₁ × W
F ₁ = F ₃ × tan θ
Here, the height H indicates the height of the rotary shaft 37 in the vertical direction 30 with respect to the right slide shaft 23, that is, the right slide shaft 23 and the rotary shaft 37 are orthogonally projected on a straight line parallel to the vertical direction 30, respectively. The distance between the two points is shown. The width W indicates the distance between the right slide shaft 23 and the rotation shaft 37 in the slide direction 27, that is, two points obtained by orthogonally projecting the right slide shaft 23 and the rotation shaft 37 onto a straight line parallel to the slide direction 27. Shows the distance between. The crank angle θ indicates an angle formed by the first straight line 51 along the back side first crank 31 and the second straight line 52 along the slide direction 27. The first straight line 51 is orthogonal to the rotation shaft 37 and intersects the right slide shaft 23.

FIG. 7 is a graph showing the relationship between the crank angle θ and the conversion rate. The conversion rate indicates the ratio of the right link mechanism 21 converting the elastic force that the plurality of springs 42 gives to the right slide shaft 23 into the lifting force that raises the right mounting portion 7, and the absolute value of the lifting force is expressed as the elasticity. It shows the value divided by the absolute value of force. The graph of FIG. 7 shows that the conversion rate is 0 when the crank angle θ is 0 degrees, and the conversion rate increases as the crank angle θ approaches 90 degrees. The graph of FIG. 7 shows that the conversion rate is generally greater than 1.7 when the crank angle θ is greater than 60 degrees. The plurality of springs 42 change their elastic force when they are bent. The change in the elastic force of the plurality of springs 42 appears as a change in the lifting force that raises the right mounting portion 7, and when the conversion rate is greater than 2.0, the lifting force changes to an extent that it is difficult to actually adopt. Sometimes.

The upper limit unit 28 limits the range in which the right platform 7 is disposed so that the crank angle θ is not greater than 60 degrees, and limits the range in which the right platform 7 moves parallel to the vertical direction 30. ing. In the right link mechanism 21, the upper limit restricting portion 28 restricts the movement range of the right placing portion 7 so that the crank angle θ does not become larger than 60 degrees, so that the lifting force can be appropriately adjusted even when the plurality of springs 42 are bent. Can be secured.

FIG. 8 is a graph showing the relationship between the crank angle θ and the force that must be applied to the right slide shaft 23 when the right mounting portion 7 is raised. For example, the right placement unit 7 is raised when the lifting force converted by the right link mechanism 21 is 3.5 kgf or more. The graph of FIG. 8 shows that the force that must be applied to the right slide shaft 23 when raising the right mounting portion 7 decreases as the crank angle θ approaches 90 degrees. The graph of FIG. 8 further shows that the force that must be applied to the right slide shaft 23 when raising the right mounting portion 7 is approximately 10 kgf when the crank angle θ is 20 degrees. . In order to apply a force of 10 kgf or more to the right slide shaft 23, it is necessary to increase the strength of the mounting table main body 6 and the right link mechanism 21 to a level where it is difficult to actually employ.

The lower limit restricting unit restricts the range in which the right placing unit 7 is arranged so that the crank angle θ is not smaller than 20 degrees, and restricts the range in which the right placing unit 7 moves parallel to the vertical direction 30. Yes. In the right link mechanism 21, the lower limit restricting unit restricts the movement range of the right placing unit 7 so that the crank angle θ is not smaller than 20 degrees, so that the strength required for the placing table body 6 and the right link mechanism 21 is increased. Can be reduced. The mounting table 1 can reduce the manufacturing cost of the mounting table body 6 and the right link mechanism 21 by reducing the strength required for the mounting table body 6 and the right link mechanism 21.

FIG. 9 is a graph showing the relationship between the lowering amount of the right mounting portion 7 and the conversion rate, the relationship between the lowering amount and the elastic force, and the relationship between the lowering amount and the lifting force. The amount of lowering when the right mounting part 7 is disposed at a certain position indicates the distance from the state where the right mounting part 7 is disposed at the upper limit to the position. The graph of FIG. 9 shows that the conversion rate decreases as the amount of lowering of the right mounting portion 7 increases. The graph of FIG. 9 further shows that the elastic force of the plurality of springs 42 increases as the amount of lowering of the right mounting portion 7 increases, and the plurality of springs 42 as the amount of lowering of the right mounting portion 7 increases. This indicates that the length of stretching becomes longer.

The absolute value of the lifting force when the right mounting part 7 is disposed at a certain position is the absolute value of the elastic force of the plurality of springs 42 when the right mounting part 7 is disposed at the position. It is equal to a value obtained by multiplying the conversion rate when the unit 7 is arranged at that position. The graph of FIG. 9 further shows that the deviation of the lifting force is smaller than the elastic force of the plurality of springs 42 when the amount of lowering of the right mounting portion 7 changes from 0 mm to 30 mm. . The graph of FIG. 9 further shows that the deviation of the lifting force falls within a predetermined range when the amount of lowering of the right mounting portion 7 changes from 0 mm to 30 mm.

The mounting table 1 further includes a left link mechanism and a left elastic part, not shown. As with the right link mechanism 21, the left link mechanism supports the left mounting part 8 on the mounting table body 6 so as to be able to translate in parallel with the vertical direction 30, and allows the left mounting part 8 to move in the vertical direction 30. Restricted. At this time, the right side link mechanism 21 and the left side link mechanism are arranged so that the right side placement surface 11 and the left side placement unit 11 are on the same plane parallel to the installation surface 5 when the right side placement portion 7 and the left side placement portion 8 are raised to the upper limit. The left mounting surface 12 is formed along the left side. Similar to the right elastic portion 40, the left elastic portion applies an elastic force to the left slide shaft provided in the left link mechanism. The left link mechanism further converts the movement of the left mounting portion 8 in the vertical direction 30 into the movement of the left slide shaft in the sliding direction 27, and the elastic force applied to the left slide shaft by the left elastic portion is changed to the left mounting portion. 8 is converted into lifting force that raises.

When the mounting table 1 is assembled, the elastic force of the plurality of springs 42 is adjusted using the adjusting mechanism 41. That is, the plurality of fixing portions 44 of the adjustment mechanism 41 are loosened so that the spring hooking portion 43 can move with respect to the mounting table main body 6. The spring hooking portion 43 is disposed at an appropriate position so that the elastic force of the plurality of springs 42 is included in an appropriate range when the plurality of fixing portions 44 are loosened. The plurality of fixing portions 44 are fastened to the base frame 47 in a state where the spring hooking portions 43 are arranged at appropriate positions, and fix the spring hooking portions 43 to the mounting table main body 6. The mounting table 1 can appropriately adjust the elastic force applied to the right slide shaft 23 by adjusting the elastic force of the plurality of springs 42, and the lifting force applied to the right mounting unit 7 can be adjusted to a predetermined value. Can be in range.

When the user intends to read the image of the binding medium using the image reading device 10, first, the user places the pressing plate portion 14 at the retracted position. The user places the right portion of the binding medium on the right placement unit 7 so that the reading surface to be read of the binding medium faces the reading unit 2 after the pressing plate portion 14 is disposed at the retracted position. The left portion of the binding medium is placed on the left placement portion 8. After placing the binding medium on the right placement unit 7 and the left placement unit 8, the user places the pressing plate unit 14 at the pressing position. The presser plate portion 14 is disposed at the press position so that the presser plate portion 14 comes into close contact with the reading surface facing the reading portion 2 of the binding medium, and the right placement portion 7 and the left placement portion 8 are lowered. The right mounting part 7 and the left mounting part 8 are pushed down. The binding medium is arranged so that the distance between the reading surface of the binding medium and the reading unit 2 becomes equal to a predetermined distance by lowering the right mounting unit 7 and the left mounting unit 8.

The right link mechanism 21 translates the right slide shaft 23 outward in the slide direction 27 when the right mounting portion 7 is lowered. The plurality of springs 42 are elastically deformed and extended when the right slide shaft 23 translates outward. The plurality of springs 42 are elastically deformed to give an elastic force to the right slide shaft 23 so that the right slide shaft 23 translates toward the center. The right link mechanism 21 gives the right mounting part 7 a lifting force that opposes the force by which the right mounting part 7 is pushed down by the plurality of springs 42 giving an elastic force to the right slide shaft 23. The lifting force is within a predetermined range. Similarly to the right mounting unit 7, the left mounting unit 8 is given a lifting force that opposes the force by which the right mounting unit 7 is pressed down by the left link mechanism when being pressed down by the pressing plate unit 14. The lifting force is within a predetermined range. Even when the lowering amount becomes large, the user does not need to increase the force to push down the pressing plate portion 14 because the lifting force is within a predetermined range, and can easily press down the pressing plate portion 14. .

The height at which the left mounting portion 8 is arranged is the portion of the binding medium where the thickness of the portion mounted on the left mounting portion 8 is the portion of the binding medium mounted on the right mounting portion 7. Is different from the height at which the right mounting portion 7 is disposed. The difference between the lifting force of the right mounting part 7 and the lifting force of the left mounting part 8 is that the lifting force of the right mounting part 7 and the lifting force of the left mounting part 8 are within a predetermined range. Even when the height of the left mounting portion 8 is different from the height of the right mounting portion 7, it is relatively small. Even when the thickness of the binding medium placed on the left placement unit 8 is different from the thickness of the binding medium placed on the right placement unit 7, the mounting table 1 has a lifting force of the right placement unit 7. Since the difference from the lifting force of the left mounting portion 8 is small, it is possible to prevent the pressing plate portion 14 from being inclined.

The user operates the image reading apparatus 10 so that the image of the binding medium is read after the pressing plate portion 14 is arranged at the pressing position. In response to the operation of the image reading device 10, the reading unit 2 reads an image of the binding medium placed on the placement table 1 using light transmitted through the pressing plate unit 14. After the image reading apparatus 10 reads the image of the binding medium, the user raises the pressing plate portion 14 and places the pressing plate portion 14 at the retracted position. The user repeatedly executes the above operation when there is another reading surface to be read.

[Effect of the mounting table 1 of the first embodiment]
The mounting table 1 according to the first embodiment includes a right mounting portion 7, a right slide shaft 23, a right elastic portion 40, and a right link mechanism 21. The right slide shaft 23 is supported by the mounting table body 6 so as to be able to translate in the slide direction 27. The right elastic portion 40 gives the right slide shaft 23 an elastic force that moves the right slide shaft 23 in the sliding direction 27 with respect to the mounting table body 6. The right link mechanism 21 converts the elastic force into a lifting force that moves the right placement unit 7 in a vertical direction 30 different from the slide direction 27. At this time, the right link mechanism 21 is such that the conversion rate obtained by dividing the magnitude of the lifting force by the magnitude of the elastic force decreases as the amount of lowering that the right-side placement unit 7 moves against the lifting force increases. Is formed.

Since the conversion rate decreases as the amount of lowering increases, the mounting table 1 keeps the lifting force applied to the right mounting unit 7 within a predetermined range even when the right mounting unit 7 moves in the vertical direction 30. be able to. The mounting table 1 can easily push down the right mounting unit 7 when the lifting force applied to the right mounting unit 7 falls within a predetermined range.

Further, the right link mechanism 21 of the mounting table 1 according to the first embodiment includes a back side first crank 31, an upper limit limiting unit 28, and a lower limit limiting unit. The back side first crank 31 is fixed to the right slide shaft 23 and supported by the right mounting portion 7 so as to be rotatable about the rotation shaft 37. The back side first crank 31, the upper limit limiting unit 28, and the lower limit limiting unit limit the movable range of the right mounting unit 7 so that the crank angle θ is included in the range of 20 degrees to 60 degrees. The crank angle θ indicates an angle formed by a first straight line 51 that is orthogonal to the rotation shaft 37 and intersects the right slide shaft 23 and a second straight line 52 that is parallel to the slide direction 27.

The mounting table 1 can appropriately secure the lifting force even when the plurality of springs 42 are bent by limiting the movable range of the right mounting portion 7 so that the crank angle θ does not become larger than 60 degrees. . The mounting table 1 reduces the strength required for the mounting table body 6 and the right link mechanism 21 by limiting the movable range of the right mounting unit 7 so that the crank angle θ is not smaller than 20 degrees, The manufacturing cost of the mounting table main body 6 and the right link mechanism 21 can be reduced.

Further, the right elastic part 40 of the mounting table 1 according to the first embodiment includes a plurality of springs 42 that generate elastic force and an adjustment mechanism that adjusts the length by which the plurality of springs 42 are extended by the movement of the right mounting part 7. 41. The mounting table 1 can adjust the elastic force applied to the right slide shaft 23 even when there is a manufacturing error in the elastic modulus of the plurality of springs 42, and can provide an appropriate lifting force to the right mounting unit 7. it can.

Further, the adjustment mechanism 41 of the mounting table 1 according to the first embodiment includes a spring hooking portion 43 and a plurality of fixing portions 44. The spring hook 43 is supported at the other end opposite to one end supported by the right slide shaft 23 among the plurality of springs 42. The plurality of fixing portions 44 fix the spring hooking portion 43 to the mounting table main body 6 in a state where the spring hooking portion 43 is disposed at a predetermined position. The mounting table 1 can appropriately adjust the elastic force applied to the right slide shaft 23 by fixing the spring hooking portion 43 at a predetermined position.

Further, the right link mechanism 21 of the mounting table 1 according to the first embodiment includes a back side first crank 31 and a front side first crank 34. The back side first crank 31 is a movement in which the back side portion of the right mounting portion 7 moves in the vertical direction 30, and the back side portion of the right slide shaft 23 moves in the slide direction 27. It is fixed to the right slide shaft 23 so as to be converted. The front side first crank 34 is a movement in which the front side portion of the right mounting portion 7 moves in the vertical direction 30, and the movement in which the front side portion of the right slide shaft 23 is moved in the sliding direction 27. It is fixed to the right slide shaft 23 so as to be converted. The mounting table 1 prevents the right mounting part 7 from tilting so that the depth of the rear part of the right mounting part 7 and the front part of the right mounting part 7 are different. be able to.

In addition, the mounting table 1 according to the first embodiment further includes a pressing plate portion 14 that presses a medium mounted on the right mounting portion 7. The image reading device 10 provided with the mounting table 1 reads an image on a medium using light transmitted through the pressing plate portion 14. The mounting table 1 is suitable for the image reading apparatus 10 that reads an image of a medium using light that passes through the pressing plate portion 14.

The mounting table 1 of the first embodiment further includes a left mounting portion 8, a left slide shaft, a left elastic portion, and a left link mechanism. The left slide shaft is supported by the mounting table body 6 so as to be able to translate in the slide direction 27. The left elastic portion gives the left slide shaft an elastic force that moves the left slide shaft in the slide direction 27 with respect to the mounting table body 6. The left link mechanism converts the elastic force applied to the left slide shaft into a lifting force that moves the left mounting portion 8 in the vertical direction 30. At this time, as with the right link mechanism 21, the left link mechanism changes the magnitude of the lifting force to the elastic force of the left elastic portion as the amount of lowering that the left mounting portion 8 moves against the lifting force increases. It is formed so that the conversion rate divided by the size becomes small. The pressing plate portion 14 presses a portion of the medium that is placed on the right placement portion 7 and a portion of the medium that is placed on the left placement portion 8. Even when the thickness of the binding medium placed on the left placement unit 8 is different from the thickness of the binding medium placed on the right placement unit 7, the mounting table 1 has a lifting force of the right placement unit 7. Since the difference from the lifting force of the left mounting portion 8 is small, it is possible to prevent the pressing plate portion 14 from being inclined.

Further, the pressing plate portion 14 of the mounting table 1 of the first embodiment is supported by the mounting table main body 6 so as to be capable of translational movement in the pressing plate translational direction 15. The presser plate part 14 is supported so as to be capable of translational movement, so that the presser plate part 14 is supported with respect to the slide direction 27 as compared with other presser plate parts supported so as to be able to rotate and move on a rotating shaft parallel to the slide direction 27. Easy to tilt. Since the difference between the lifting force of the right mounting part 7 and the lifting force of the left mounting part 8 is small, the mounting table 1 can prevent the pressing plate part 14 from tilting even when the pressing plate part 14 tends to tilt. Can be prevented.

Further, the mounting table 1 of the first embodiment includes the right mounting portion 7, the right slide shaft 23, the back side first crank 31, and the front side first crank 34. The right slide shaft 23 is supported by the mounting table body 6 so as to be able to translate in the slide direction 27. The back side first crank 31 moves in the vertical direction 30 so that the back side portion of the right side mounting portion 7 moves with respect to the mounting base body 6, and the back side end of the right slide shaft 23 moves in the sliding direction 27. Convert it into exercise. The front-side first crank 34 moves in such a manner that the front-side portion of the right-side mounting portion 7 moves in the vertical direction 30 with respect to the mounting-table main body 6, and the front-side end of the right slide shaft 23 moves in the sliding direction 27. Convert it into exercise. The mounting table 1 is configured so that the back side first crank 31 and the front side second crank 35 are synchronized, whereby the back side part of the right side mounting part 7 and the front side part of the right side mounting part 7. It is possible to prevent the right-side mounting portion 7 from being inclined so that the height of the right-side mounting portion 7 is different.

FIG. 10 is a plan view showing the mounting table of the second embodiment. In the mounting table of the second embodiment, as shown in FIG. 10, the adjusting mechanism 41 of the mounting table 1 of the above-described first embodiment is replaced with another adjusting mechanism 61. The adjustment mechanism 61 is formed in a plate shape and is fixed to the base frame 47 of the mounting table body 6, and includes a plurality of first spring through holes 62, a plurality of second spring through holes 63, and a plurality of third spring through holes. A hole 64 is formed. The distance between the plurality of first spring through holes 62 and the right slide shaft 23 is longer than the distance between the plurality of second spring through holes 63 and the right slide shaft 23. The distance between the plurality of second spring through holes 63 and the right slide shaft 23 is longer than the distance between the plurality of third spring through holes 64 and the right slide shaft 23. The second hooks 49 of the plurality of springs 42 are a plurality of springs of any one of a plurality of first spring through holes 62, a plurality of second spring through holes 63, and a plurality of third spring through holes 64. It is caught in the through hole for use.

In the mounting table of the second embodiment, the elastic force of the plurality of springs 42 is adjusted using the adjusting mechanism 61. That is, the second hooks 49 of the plurality of springs 42 include a plurality of first spring through holes 62 and a plurality of second spring through holes 63 so that the elastic force of the plurality of springs 42 is included in an appropriate range. It is hooked in any of the plurality of third through holes 64 for springs. In the mounting table of the second embodiment, the second hooks 49 of the plurality of springs 42 are hooked into any of the plurality of spring through holes, so that the elastic force applied to the right slide shaft 23 can be appropriately adjusted. . For this reason, similarly to the mounting table 1 of the first embodiment described above, the mounting table of the second embodiment has a lifting force applied to the right mounting portion 7 even when there is a manufacturing error in the elastic modulus of the plurality of springs 42. Can fall within a predetermined range.

FIG. 11 is a plan view showing the mounting table of the third embodiment. In the mounting table of the third embodiment, as shown in FIG. 11, the adjusting mechanism 41 of the mounting table 1 of the first embodiment described above is replaced with another adjusting mechanism 70. The adjustment mechanism 70 includes a spring hooking portion 71 and a plurality of S-shaped hooks 72. The spring hook portion 71 is formed in a plate shape, is fixed to the mounting table main body 6, and a plurality of spring through holes 73 are formed. The second hooks 49 of the plurality of springs 42 are respectively hooked on the plurality of spring through holes 73. One end of the plurality of S-shaped hooks 72 is hooked on the right slide shaft 23, and the other end is hooked on the first hooks 48 of the plurality of springs 42.

In the mounting table of the third embodiment, the elastic force of the plurality of springs 42 is adjusted using the adjusting mechanism 70. That is, the plurality of S-shaped hooks 72 are replaced with other S-shaped hooks having different lengths from the plurality of S-shaped hooks 72 so that the elastic force of the plurality of springs 42 is included in an appropriate range. In addition, the elastic force of the plurality of springs 42 is adjusted. Further, each of the plurality of S-shaped hooks 72 can be replaced with a plurality of S-shaped hooks to be connected. One S-shaped hook of the plurality of S-shaped hooks is hooked on the right slide shaft 23, and the other S-shaped hook of the plurality of S-shaped hooks is hooked on the first hooks 48 of the plurality of springs 42. It has been. At this time, the adjusting mechanism 70 changes the amount of the plurality of springs 42 by changing the number of the plurality of S-shaped hooks to be connected, and the elastic force of the plurality of springs 42 is included in an appropriate range. The elastic force of the plurality of springs 42 is adjusted. For this reason, similarly to the mounting table 1 of the first embodiment, the mounting table of the third embodiment has a lifting force applied to the right mounting portion 7 even when there is a manufacturing error in the elastic modulus of the plurality of springs 42. Can fall within a predetermined range.

By the way, the mounting table of the first to third embodiments described above includes a plurality of springs 42. However, the plurality of springs 42 are replaced with one spring having an elastic force equivalent to that of the plurality of springs 42. May be. The mounting tables of the first to third embodiments can keep the lifting force applied to the right mounting portion 7 within a predetermined range even when the plurality of springs 42 are replaced with one spring. One spring has a larger elastic force than each of the plurality of springs 42. The plurality of springs 42 of the mounting table of the first to third embodiments described above are attached to the mounting table one by one, so that they are compared with one tension coil spring having the same elastic force as the plurality of springs 42. Thus, it can be easily attached to the mounting table.

By the way, although the mounting table of the first to third embodiments described above includes the

adjustment mechanisms

41, 61, and 70, the

adjustment mechanisms

41, 61, and 70 may be omitted. At this time, the mounting tables of the first to third embodiments use the springs whose elastic force is included in an appropriate range as the plurality of springs 42, thereby increasing the lifting force applied to the right mounting unit 7 within a predetermined range. Can fit in.

FIG. 12 is a side sectional view showing the mounting table of the fourth embodiment. In the mounting table of the fourth embodiment, as shown in FIG. 12, the right elastic portion 40 of the mounting table 1 of the above-described first embodiment is replaced with a plurality of other compression coil springs 81. The plurality of compression coil springs 81 are disposed below the right mounting part 7 so as to be along a straight line parallel to the sliding direction 27. One end of each of the plurality of compression coil springs 81 is supported by the right slide shaft 23, and the other end is supported by the mounting table body 6. The plurality of compression coil springs 81 are elastically deformed so that the length is shortened via the right link mechanism 21 when the right mounting portion 7 is lowered. The mounting table of the fourth embodiment has a plurality of compression coil springs 81 so that the plurality of compression coil springs 81 are not buckled when the plurality of compression coil springs 81 are elastically deformed so that the lengths of the plurality of compression coil springs 81 are shortened. A holding portion (not shown) for holding the compression coil spring 81 is further provided. The plurality of compression coil springs 81 are elastically deformed to apply an elastic force to the right slide shaft 23 so that a lifting force is applied to the right mounting portion 7 via the right link mechanism 21.

As with the mounting table according to the first to third embodiments, the mounting table according to the fourth embodiment can keep the lifting force applied to the right mounting unit 7 within a predetermined range. The plurality of springs 42 provided on the mounting table of the first to third embodiments are easier to handle than the compression coil springs that may buckle. For this reason, the mounting tables of the first to third embodiments do not need to consider the buckling of the compression coil spring, and can be more easily manufactured as compared with the mounting table of the fourth embodiment.

FIG. 13 is a perspective view showing the mounting table of the fifth embodiment. As shown in FIG. 13, in the mounting table of the fifth embodiment, a back assist elastic portion 91 and a front assist elastic portion 92 are added to the mounting table 1 of the first embodiment described above. The back side assist elastic part 91 is formed of a compression coil spring, and is disposed in the lower part of the right side mounting part 7 in the storage space of the mounting base body 6. It is arranged on the back side. The back assist elastic portion 91 has one end supported by the mounting table body 6 and the other end supported by a back portion of the right mounting portion 7. The back assist elastic portion 91 is elastically deformed and shortened when the right mounting portion 7 is lowered. The back assist elastic portion 91 is elastically deformed so as to be shortened when the right placement portion 7 is lowered, and gives an elastic force to the right placement portion 7 so that the right placement portion 7 is raised.

The near-side assist elastic portion 92 is formed of a compression coil spring, and is disposed in the lower portion of the right-side placement portion 7 in the storage space of the placement table main body 6. It is arranged on the front side. The front assist elastic portion 92 has one end supported by the mounting table body 6 and the other end supported by the front portion of the right mounting portion 7. The front assist elastic portion 92 is elastically deformed so as to be shortened when the right placement portion 7 is lowered, and gives an elastic force to the right placement portion 7 so that the right placement portion 7 is raised.

In the mounting table of the fifth embodiment, the crank angle θ limited by the upper limit limiting unit 28 and the lower limit limiting unit is further limited by the upper limit limiting unit 28 and the lower limit limiting unit of the mounting table 1 of the first embodiment. It is different from the range of the angle θ. In the mounting table of the fifth embodiment, the elastic force that the right elastic portion 40 applies to the right slide shaft 23 is different from the elastic force that the right elastic portion 40 of the mounting table 1 of the first embodiment applies to the right slide shaft 23. .

FIG. 14 shows the relationship between the lowering amount of the right mounting part 7 of the mounting table of Example 5 and the conversion rate, shows the relationship between the lowering amount and the elastic force of the tension coil spring, and depends on the lowering amount and the tension coil spring. It is a graph which shows the relationship with lifting force. The graph of FIG. 14 shows that the conversion rate decreases as the amount of lowering of the right mounting portion 7 increases. In the graph of FIG. 14, the relationship between the lowering amount of the right mounting unit 7 by the right link mechanism 21 of the mounting table of Example 5 and the conversion rate is further shown on the right side by the right link mechanism 21 of the mounting table 1 of Example 1. It shows that the relationship between the amount of lowering of the mounting portion 7 and the conversion rate is different (see FIG. 9).

The elastic force of the tension coil spring in the graph of FIG. 14 indicates the elastic force that the right elastic part 40 of the mounting table of Example 5 gives to the right slide shaft 23. The graph of FIG. 14 shows that the elastic force of the tension coil spring increases as the amount of lowering of the right mounting portion 7 increases. In the graph of FIG. 14, the elastic force applied to the right slide shaft 23 by the right elastic portion 40 of the mounting table according to the fifth embodiment is further applied to the right slide shaft 23 by the right elastic portion 40 of the mounting table 1 according to the first embodiment. It is different from power.

The lifting force by the tension coil spring indicates the lifting force converted from the elastic force of the plurality of springs 42 via the right link mechanism 21 of the mounting table of the fifth embodiment, and from the right link mechanism 21 of the mounting table of the fifth embodiment. The lifting force applied to the right mounting part 7 is shown. That is, a value corresponding to a certain amount of decrease in the lifting force by the tension coil spring is a value corresponding to the amount of decrease in the elastic force of the tension coil spring, and a value corresponding to the amount of decrease in the conversion rate. Equal to the product of The graph of FIG. 14 shows that the lifting force due to the tension coil spring decreases as the amount of lowering of the right mounting portion 7 increases, and further that the deviation of the lifting force due to the tension coil spring becomes greater than a predetermined value. Show.

FIG. 15 shows the relationship between the lowering amount of the mounting table of Example 5 and the lifting force by the tension coil spring, shows the relationship between the lowering amount and the lifting force by the compression coil spring, and shows the relationship between the lowering amount and the lifting force. It is a graph to show. The lifting force by the compression coil spring in the graph of FIG. 15 indicates the lifting force that the back assist elastic portion 91 and the front assist elastic portion 92 impart to the right placement portion 7. The graph of FIG. 15 shows that the lifting force by the compression coil spring increases as the amount of lowering of the right side mounting portion 7 increases.

The lifting force in the graph of FIG. 15 indicates the lifting force that the right link mechanism 21, the back assist elastic portion 91, and the front assist elastic portion 92 give to the right placement portion 7, and the lifting force by the tension coil spring is the compression coil. The value obtained by adding the lifting force by the spring is shown. The graph of FIG. 15 shows that the lifting force changes as the amount of lowering of the right mounting portion 7 increases. The graph of FIG. 15 further shows that the deviation of the lifting force is smaller than the deviation of the lifting force by the tension coil spring, and shows that the deviation of the lifting force is within a predetermined range. The height of the mounting table main body 6 can be lowered by shifting the range of the crank angle θ limited by the upper limit limiting unit 28 and the lower limit limiting unit to a smaller one. When the height is low, the scanning operation can be easily performed. When the range of the crank angle θ is shifted to a smaller range, the lifting force by the tension coil spring may become too small as the amount of lowering increases. The mounting table of the fifth embodiment can keep the lifting force within a predetermined range by providing the back assist elastic portion 91 even when the lifting force becomes too small as the lowering amount increases.

By the way, the mounting tables of the first to fifth embodiments limit the movable range of the right mounting portion 7 by using the upper limit limiting portion 28 and the lower limit limiting portion, but the right mounting by using other members. The movable range of the placement unit 7 may be limited. For example, the mounting table may limit the movable range of the right mounting portion 7 by the rear lower slide portion 24 and the front lower slide portion 25 limiting the movable range of the right slide shaft 23. . Further, the mounting table is configured such that the back side upper slide part 33 and the front side upper slide part 36 limit the movable range of the back side second crank 32 and the front side second crank 35, thereby The range of motion may be limited.

The embodiment has been described above, but the embodiment is not limited by the above-described content. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, at least one of various omissions, substitutions, and changes of the components can be made without departing from the scope of the embodiments.

DESCRIPTION OF SYMBOLS 10: Image reading device 1: Mounting base 6: Mounting base main body 7: Right side mounting part 8: Left side mounting part 14: Holding plate part 21: Right side link mechanism 23: Right side slide shaft 24: Back side lower side sliding part 25 : Front side lower slide part 28: Upper limit part 31: Back side first crank 34: Front side first crank 37: Rotating shaft 40: Right elastic part 41: Adjustment mechanism 42: Plural springs 43: Spring hooking part 44 : A plurality of fixed parts 51: a first straight line 52: a second straight line 61: an adjustment mechanism 72: a plurality of S-shaped hooks 81: a plurality of compression coil springs 91: a back assist elastic part 92: a front assist elastic part

Claims

A mounting section;
A slide shaft supported by the mounting table body so as to be capable of translational movement in the first direction;
An elastic portion for applying an elastic force to the slide shaft to move the slide shaft in the first direction with respect to the mounting table main body;
A link mechanism that converts the elastic force into a lifting force that moves the mounting portion in a second direction different from the first direction;
The link mechanism is such that the conversion rate obtained by dividing the magnitude of the lifting force by the magnitude of the elastic force decreases as the amount of lowering that the mounting portion moves against the lifting force increases. Formed mounting table.
The link mechanism is
A crank that is fixed to the slide shaft and supported by the mounting portion so as to be rotatable about a rotation shaft;
As described above, an angle formed by a first straight line orthogonal to the rotation axis and intersecting the slide axis and a second straight line parallel to the first direction is included in a range of 20 degrees to 60 degrees. The mounting table according to claim 1, further comprising a limiting unit that limits a movable range of the mounting unit.
The elastic part is
An elastic body that generates the elastic force;
The mounting table according to claim 1, further comprising an adjustment mechanism that adjusts a displacement amount of the elastic body.
The adjustment mechanism is
A hook portion that supports the other end of the elastic body opposite to the one end supported by the slide shaft;
The mounting table according to claim 3, further comprising: a fixing unit that fixes the hooking unit to the mounting table main body in a state where the hooking unit is disposed at a predetermined position.
The elastic body is
The mounting table according to claim 4, comprising a plurality of elastic bodies whose both ends are respectively supported by the hook portion and the slide shaft.
The mounting table according to claim 3, wherein the elastic body is formed from a tension coil spring that generates the elastic force by being elastically deformed so as to extend.
The link mechanism is
A first link that converts a first movement in which the first portion of the mounting portion moves in the second direction with respect to the mounting table main body into a second movement in which the slide shaft moves in the first direction. Mechanism,
A third movement in which the second part different from the first part in the mounting part moves in the second direction relative to the mounting base body, and a fourth movement in which the slide shaft moves in the first direction. The mounting table according to claim 1, further comprising: a second link mechanism that converts into a second link mechanism.
The mounting table according to claim 1, further comprising: an assist elastic portion that gives the mounting portion another elastic force that translates the mounting portion in the second direction.
It further comprises a holding plate portion that holds the medium placed on the placement portion,
The mounting table according to claim 1, wherein an image of the medium is read using light that passes through the pressing plate portion.
With other mounting parts,
Another slide shaft supported by the mounting table main body so as to be capable of translational movement in the third direction;
Another elastic portion that applies another elastic force to the other slide shaft to move the other slide shaft in the third direction with respect to the mounting table main body;
Another link mechanism that converts the other elastic force into another lifting force that moves the other placement portion in a fourth direction different from the third direction;
The other link mechanism is configured such that the magnitude of the other lifting force is increased as the other lowering amount of the other placement portion moved opposite to the other lifting force is increased. Formed so that the other conversion rate divided by
The said pressing plate part presses down the 1st part mounted in the said mounting part of the said medium, and the 2nd part mounted in the said other mounting part of the said medium. The mounting table described in 1.
The mounting table according to claim 10, wherein the pressing plate portion is slidably supported by the mounting table main body.
A mounting section;
A slide shaft supported by the mounting table body so as to be capable of translational movement in the first direction;
A first movement in which the first part of the mounting portion moves relative to the mounting table main body in a second direction different from the first direction is changed to a second movement in which the slide shaft moves in the first direction. A first link mechanism for conversion;
A third movement in which the second part different from the first part in the mounting part moves in the second direction relative to the mounting base body, and a fourth movement in which the slide shaft moves in the first direction. A mounting table comprising: a second link mechanism for converting into a second link mechanism.