JP2012164105A - Placement unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a placement unit for placing thereon a placed object such as a keyboard and a notebook PC, which adjusts a rotational angle of a placing member with the placed object placed thereon with good operability.SOLUTION: A placement unit includes a placing member 10 with a placed object placed thereon, a supporting member connected to the placing member 10 by a hinge member, and a supporting mechanism having a first supporting part for supporting the rotation center of the placing member 10 rotatably by an attachment 41 and a second supporting part for supporting the placing member 10 and the supporting member unrotatably by an attachment 42.

Description

  The present invention relates to a mounting unit on which a mounted object such as a keyboard or a notebook personal computer (hereinafter abbreviated as “notebook PC”) is placed and supports the mounted object.

  In order to improve operability, the keyboard and notebook PC are preferably placed on a mounting table adjusted to a height and angle suitable for the user. Here, as one of the requirements for the mounting table, the keyboard and notebook PC can be easily adjusted to a height and angle suitable for the user, and after the adjustment, the height and angle are stable. Is to be maintained.

  Heretofore, a stairway for entering and exiting a scaffold provided with an angle adjusting mechanism has been proposed. However, the proposed angle adjustment mechanism is an angle adjustment mechanism for installing the stairs horizontally, and even if this technical idea is adopted, the keyboard and the notebook PC cannot be adjusted to a desired angle.

  Conventionally, a master rope support device having a height adjusting mechanism has been proposed. However, even if this proposal is adopted, it is impossible to adjust the keyboard or notebook PC to a desired angle.

  Further, conventionally, there has been proposed an operation table for a computer or the like having a structure with a shelf on a desk and a structure for adjusting the height of the desk or shelf or the inclination angle of the shelf.

  However, this structure is a structure in which the height and inclination angle are determined at the time of installation, and it is difficult to easily adjust the height and inclination angle after installation.

Japanese Utility Model Publication No. 6-44952 JP-A-10-15093 JP 59-075326

  The subject of the mounting unit of this indication is providing the mounting unit which can adjust the mounting angle of a mounting thing with sufficient operativity.

  The mounting unit according to the present disclosure includes a mounting member that receives the mounting object, a support member that supports rotation of the mounting member, and a mounting member that can rotate the mounting member with respect to the support member. And a hinge member connecting the support member. The mounting unit of the present disclosure further includes a first support portion that rotatably supports the rotation center of the mounting member, and a second support portion that supports the mounting member and the support member so as not to rotate. The support mechanism which has this.

  The mounting unit of the present disclosure has the support mechanism described above. For this reason, by releasing the support mechanism of the 2nd support part which supports a mounting member and a support member so that rotation is impossible, the angle of a mounting member is improved in operativity by rotating a mounting member. Can be adjusted. In addition, after the adjustment, the second support portion is acted again to support the mounting member and the support member in a non-rotatable manner, so that the mounting member is stably maintained at the adjusted angle.

It is an external appearance perspective view of the mounting unit of 1st Embodiment. It is a partial expansion perspective view of the mounting unit shown in FIG. It is a perspective view of the right stand. It is the fragmentary perspective view which showed the inner side of the side plate. It is the fragmentary perspective view centering on the side plate of the mounting unit of 2nd Embodiment. It is the fragmentary perspective view which showed the state rotated so that the back surface of the top plate of the mounting unit of 2nd Embodiment might face upward. It is the fragmentary perspective view which showed the inner side of the side plate. It is an expansion perspective view of the inside part of a side plate. It is the figure which showed the usage example using a top-plate expansion component. It is the figure which showed the example which made the mounting unit 2 steps | paragraphs structure. It is the figure which showed the usage example of the mounting stand of 2 steps | paragraphs structure.

  Hereinafter, embodiments will be described.

  FIG. 1 is an external perspective view of the mounting unit according to the first embodiment. 2 is a partially enlarged perspective view of the mounting unit shown in FIG.

  1 and 2 show a mounting member 10 and a support mechanism 40 that constitute the mounting unit 1. The support mechanism 40 is disposed on the left and right of the mounting member 10, and the support mechanism 40 shown in FIGS. 1 and 2 is a right support mechanism among the left and right support mechanisms. The left and right support mechanisms are symmetrical to each other.

  The mounting member 10 includes a top plate 11 and a side plate 12. Although the side plate 12 is on both the left and right sides of the top plate 11, only the right side plate 12 is shown here. Similarly to the left and right support mechanisms 40, the left and right side plates 12 are configured to be symmetrical to each other.

  The top plate 11 is a plate for receiving a keyboard or a notebook PC. This mounting unit 1 is for adjusting the top plate 11 to a desired inclination angle and stably maintaining the adjusted inclination angle.

  A step 111 is provided on the top plate 11 of the present embodiment. This step 111 is for preventing the keyboard or notebook PC from sliding down by hitting the front side of the keyboard or notebook PC. The step 111 is also used for extending the top plate 11 as will be described later.

  In addition, a hole 112 is formed in the top plate 11. The holes 112 are for arranging power cords, wirings and the like so that they do not fall apart.

  Here, some keyboards are provided with protrusions on the bottom surface for tilting the keyboard slightly toward the front. Since the mounting unit 1 shown in FIG. 1 can freely adjust the angle of the top plate 11 itself, when the keyboard is placed on the top plate 11, the protrusions on the bottom surface of the keyboard are not used. May be. The holes 112 provided in the top plate 11 shown in FIG. 1 are also used to allow protrusions on the bottom surface of the keyboard when the keyboard is placed on the top plate 11.

  Further, the side plate 12 is formed with a screw hole 121 (see FIG. 4) at the center of rotation when the inclination angle of the top plate 11 is adjusted, and further has an arc-shaped elongated hole 122 centered on the screw hole 121. Is formed. In this embodiment, the side plate 12 has a structure attached to the side surface of the top plate 11. However, the side plate 12 may be formed integrally with the side surface of the top plate 11. The side surface of the plate 11 itself may be used as the side plate 12.

  A rod-like fastener 41 constituting the support mechanism 40 is inserted into the screw hole 121 of the side plate 12, and another fastener 42 is inserted into the elongated hole 122. In the present embodiment, male screws are employed as the fasteners 41 and 42. The fastener 41 inserted into the screw hole 121 does not need to be particularly inserted / removed when adjusting the height and angle of the top plate 11. Therefore, the screw head of the fastener 41 is structured to be turned using a tool. On the other hand, the fastener 42 inserted into the elongated hole 122 needs to be temporarily loosened when the height or angle of the top plate 11 is adjusted, and a knob 421 is provided for ease of operation. . These fasteners 41 and 42 are supported by a stand 43. In addition, it is good also as a structure which employ | adopts a pin as the fastener 41 and uses the screw hole 121 as a pin hole, and can be inserted or removed.

  FIG. 3 is a perspective view of the right stand.

  The stand 43 includes a base 431 and a standing plate 432 that stands on the base 431. The erected plate 432 is erected on the outer side of the side plate 12 (see FIGS. 1 and 2), and supports the fasteners 41 and 42 inserted into the screw holes 121 and the long holes 122 provided in the side plate 12. Part 433. The support portion 433 is formed from a plurality of protrusions 434. Each protrusion 434 extends forward and further bends upward, and has a hook shape that can support any of the fasteners 41 and 42. Further, the plurality of protrusions 434 have a pitch of an integral number of a distance between the screw hole 121 provided in the side plate 12 and the elongated hole 122 (1/2 in the embodiment shown here). These are formed at different height positions in sequence and are arranged obliquely with the upper part descending to the rear.

  1 and 2, the clip 41 is supported by the uppermost protrusion of the plurality of hook-shaped protrusions 434, and the clip 41 is screwed into the screw hole 121 of the side plate 12. The fastener 42 is supported by the second protrusion, and the fastener 41 is inserted into the elongated hole 122 of the side plate 12. Depending on which projection 434 of the standing plate 432 supports the two fasteners 41 and 42, the height of the top plate 11 can be adjusted step by step by the height of the arrangement pitch of the projections 434. . Here, the plurality of protrusions 434 are arranged so as to fall back toward the top. If the plurality of protrusions 434 are arranged so as to protrude forward as they move upward, the upper protrusion and the fastener 41 supported by the protrusion cover the lower protrusion and cover the top plate 11. When the height is changed, the operability is deteriorated. In the case of the present embodiment, since the plurality of protrusions 434 are arranged so as to fall back toward the top, a good field of view is secured during height adjustment, and the height of the top plate 11 can be adjusted with good operability. .

  FIG. 4 is a partial perspective view showing the inside of the side plate.

  A support member 20 and a hinge member 30 are disposed inside the side plate 12. In FIG. 4, only the support member 20 and the hinge member 30 on the right side of the top plate 11 are shown. However, the support member 20 and the hinge member 30 are also arranged on the left and right sides of the top plate 11 and are symmetrical to each other. Has been.

  The support member 20 includes an arm 21 along the inner side of the side plate 12 and a support bar 22 that connects the arms 21 arranged on the left and right of the top plate 11. A screw hole 211 is formed in the arm 21 at a position communicating with the long hole 122 of the side plate 12. The fastener 42 inserted into the long hole 122 is screwed into the screw hole 211 of the arm 21. The arm 21 is in contact with the inner surface 12 a of the side plate 12, and has a structure that generates friction between the arm 21 and the side plate 12 even when the fastener 42 is loosened.

  The hinge member 30 hinge-connects the support bar 22 and the back surface of the top plate 11. The hinge member 30 is configured such that an inner rotary shaft 31 and an outer bearing 32 are concentric, and the rotary shaft 31 connects a left and right screw hole 121 provided in the left and right side plates 12. Are arranged to match. The hinge member 30 has an inner rotary shaft 31 screwed to the back surface of the top plate 11 and an outer bearing 32 screwed to the support bar 22. Therefore, the top plate 11 is rotatable around a line connecting the screw holes 121 of the left and right side plates 12. That is, the fastener 41 is supported by the protrusion 434 of the standing plate 432 and is screwed into the screw hole 121 of the side plate 12 so that the top plate 11 is rotatably supported by the standing plate 432.

  In the hinge member 30, friction acts between the rotating shaft 31 and the bearing 32. For this reason, the top plate 11 is stationary with the friction in an inclined state. Therefore, even if the fastener 42 is loosened by operating the knob 421 while the keyboard or notebook PC is placed on the top plate 11, coupled with the frictional force acting between the arm 21 and the side plate 12, The top plate 11 is prevented from suddenly tilting, ensuring safety and operability. The fastener 42 is supported by the protrusion 434 of the standing plate 432, inserted into the long hole 122 of the side plate 12, and fastened to the screw hole 211 of the arm 21 of the support member 20. The fastener 42 supports the placing member 10 and the support member 20 on the standing plate 432 so as not to rotate by this tightening.

  In adjusting the height of the top plate 11 of the mounting unit 1 of this embodiment, the two knobs 421 on the left and right sides of the top plate 11 are loosened, and the two fasteners 41 and 42 on the left and right sides are erected. The left and right knobs 421 are tightened by supporting the protrusions 434 at different heights among the plurality of 40 protrusions 434. Further, when adjusting the tilt of the top plate 11, the left and right knobs 421 are also loosened, the tilt angle of the top plate 11 is adjusted, and the left and right knobs 421 are tightened.

  In the case of the mounting unit 1 of the present embodiment, the height adjustment and the inclination angle adjustment of the top plate 11 can be performed by such a simple operation.

  In the first embodiment, the side plate 12 is provided with an arc-shaped elongated hole 122 centered on the screw hole 121, but instead of the elongated hole 122, the side plate 12 is arranged on the arc centering on the screw hole 121. A plurality of round holes may be formed. In the case of the arc-shaped long hole 122, the tilt angle of the top plate 11 is adjusted steplessly. In the case of a round hole, the tilt angle of the top plate 11 is adjusted stepwise according to the pitch of the round holes. Is done. In the case of a round hole, in order to adjust the inclination angle, the fastener 42 is once extracted and reinserted into another round hole.

  Next, a second embodiment will be described. In the description of the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals as in FIGS. 1 to 4 which are drawings of the first embodiment. Differences from the first embodiment will be described.

  FIG. 5 is a partial perspective view centering on the side plate of the mounting unit of the second embodiment. FIG. 6 is a partial perspective view showing a state in which the back surface of the top plate of the mounting unit of the second embodiment is rotated upward.

  The mounting member 10A of the mounting unit 1A of the second embodiment includes a top plate 11A and a side plate 12A. The mounting unit 1A of the second embodiment is different from the mounting unit 1 of the first embodiment described above only in the mounting member 10A described below and a support member 20A described later.

  5 and 6, two elongated holes 122A and 122A 'are formed on an arc centered on a central screw hole 121 (see FIG. 8) as one of the differences from the first embodiment described above. Has been. In addition, one of the two long holes 122A and 122A ′ is a long hole extending across the front side and the back side of the top plate 11A.

  FIG. 7 is a partial perspective view showing the inside of the side plate. FIG. 8 is an enlarged perspective view of a portion inside the side plate. FIG. 7 shows a state where the fasteners 41 and 42 are supported by the standing plate 432, and FIG. 8 shows a state where the fasteners 41 and 42 are removed.

  The side plate 12A includes a circular first plate 128A screwed to the side surface of the top plate 11A, and two second plates 129A attached to the inside of the circular first plate 128A. One of these two second plates 129A is attached to the first plate 128A on the top surface side of the top plate 11A, and the other one is attached to the first plate 128A on the back surface side of the top plate 11A. It is attached. Each of these two second plates 129A has the same thickness as the side surface of the top plate 11A, and forms the same plane as the inner surface of the side surface of the top plate 11A.

  The support member 20A includes the same arm 21 (see FIG. 4) as that of the first embodiment described above, and a support bar 22A having a shape cut short while leaving only a portion necessary for screwing the hinge member 30. However, the arm 21 in the second embodiment shown in FIGS. 7 and 8 is attached to a position shifted by the thickness in the thickness direction of the side surface of the top plate 11 as compared with the arm 21 in the first embodiment shown in FIG. ing. The arm 21 is in contact with the inner surface of the second plate 129A constituting the side plate 12A.

  The top plate 11A has an opening 113A through which the support member 20A can pass.

  In the present embodiment, a side plate 12A that extends on both the front side and the back side of the top plate 11A is provided, and two elongated holes 122A and 122A ′ centering on a central screw hole 121 (see FIG. 8) are formed. . In the present embodiment, an opening 113A is formed. Further, in the present embodiment, the side plate 12A has a second plate 129A. In this embodiment, it is the structure which can be made into the attitude | position which orient | assigned both the surface and the back surface of the top plate 11A upward by these points. In the present embodiment, one of the two long holes 122A and 122A ′ of the side plate 12A extends across the front side and the back side of the top plate 11A. For this reason, with the fastener 42 inserted into the elongated hole 122A, the posture of the top plate 11A is changed between a posture with the front surface shown in FIG. 5 facing upward and a posture with the back surface facing upward shown in FIG. be able to. For this reason, the usage of this mounting unit can be expanded by making the shape of the surface and back surface of the top plate 11A suitable for what to mount, such as a keyboard on the front surface and a tablet on the back surface.

  In the second embodiment, an opening 113A is formed in the top plate 11A so that the top plate 11A can be turned over. However, by devising the position of the screw hole 121 at the center of the side plate 12A with respect to the top plate 11A and the mounting position of the hinge member 30, that is, by separating the top plate 11 from the line connecting the screw holes 121 of the left and right side plates 12A. It is also possible to eliminate the opening 113A.

  In the second embodiment, the side plate 12A is composed of a first plate 128A screwed to the side surface of the top plate 11A and a second plate 129A attached to the inner surface of the first plate 128A. However, instead of the structure, the side plate 12A may be formed integrally with the side surface of the top plate 11A.

  Next, the usage example of this mounting unit is demonstrated.

  FIG. 9 is a diagram showing an example of use using a top plate extension component. Here, each member is shown by an abbreviated figure.

  FIG. 9A shows a top plate 51 similar to FIG. 1, and FIG. 9B shows a top plate extension component 52. As shown in FIG. 9C, the top plate extension component 52 is fitted into the top plate 51 and screwed to the top plate 51 from below.

  In FIG. 9D, a base 53 and a stand 54 riding on the base 53 are arranged on both sides of the top board 51.

  This stand 54 schematically shows the stand 40 shown in FIG.

  In this way, the top plate extension component 52 is fixed to the top plate 51 to increase the area, and a notebook PC or the like having a large size can be placed.

  FIG. 10 is a diagram showing an example in which the mounting unit has a two-stage configuration.

  Here, in addition to the configuration shown in FIG. 9D, a pair of stands 54A is further arranged on the top plate extension component 52, and a small top plate 55 is fixed to the stands 54A.

  FIG. 11 is a diagram showing an example of use of the two-stage mounting stand shown in FIG.

  In FIG. 11A, a document 60 is placed on a base 53 and a top board 51 (including the top board extension component 52), and a keyboard is placed on a small top board 55.

  In FIG. 11B, the stand 54A and the small top plate 55 are arranged on the front side of the top plate 51, the document 60 is placed on the base 53, and the top plate 51 (the top plate extension component 52 is attached). A notebook PC 62 and a keyboard 61 on a small top board 55.

  As shown in these examples, the mounting unit of the present case can be used in a wide range such as being configured in a plurality of stages.

  Hereinafter, various forms of the present case will be added.

(Appendix 1)
A mounting member for receiving the device; and
A support member for supporting rotation of the mounting member,
A hinge member connecting the mounting member and the support member, the mounting member being rotatable with respect to the support member;
A first support portion that rotatably supports the center of rotation of the mounting member; and a support mechanism that includes the mounting member and a second support portion that supports the support member in a non-rotatable manner. A mounting unit characterized by:

(Appendix 2)
The mounting unit according to claim 1, wherein the hinge member is a member that supports the mounting member in an arbitrary rotational posture with respect to the support member by friction.

(Appendix 3)
The mounting member has a top plate for receiving equipment,
The second support portion supports the mounting member and the support member in a non-rotatable and unsupportable manner in a first posture in which the first surface of the top plate faces upward from the second surface, In addition, the mounting member is also mounted in the second position when the mounting member is rotated from the first position to the second position in which the second surface faces upward from the first surface. The mounting unit according to appendix 1 or 2, wherein the mounting member and the support member are supported so as not to rotate but to be able to release the support.

(Appendix 4)
The mounting member has a top plate for receiving the device and a pair of left and right side plates, and each of the pair of left and right side plates has a first hole formed on the same single shaft; A member having a second hole formed in an arc-shaped elongated hole centered on the first hole or arranged on the arc;
The support member is a member formed on the inner side of each of the pair of left and right side plates and formed with a third hole communicating with the second hole,
The hinge member is a member that connects the mounting member and the support member so that the mounting member can rotate about the one horizontal axis with respect to the support member,
The support mechanism is
A standing member standing on the outside of each of the pair of left and right side plates;
A first fastener that is supported by the standing member and is inserted into the first hole so that the placing member is rotatably supported by the standing member;
A second member that is supported by the standing member and is inserted into both the second hole and the third hole, so that the placing member and the supporting member are supported by the standing member in a non-rotatable manner. The mounting unit according to any one of supplementary notes 1 to 3, characterized by comprising:

(Appendix 5)
The upright members are formed at different heights at a pitch that is a fraction of an integer of the distance between the first hole and the second hole, and the first fastener and the second A plurality of protrusions capable of supporting any of the fasteners;
Supplementary note 4 wherein the first fastener and the second fastener are respectively supported by any two protrusions separated from each other by the distance among the plurality of protrusions. The mounting unit described.

(Appendix 6)
Each of the plurality of protrusions has a hook shape that extends forward and further bends upward, and the plurality of protrusions are arranged in respective positions that are lowered in the vertical direction and upward in the rearward direction. 5. The mounting unit according to 5.

(Appendix 7)
In the first posture in which the first surface of the top plate faces upward from the second surface, the second hole communicates with the third hole, and the mounting member is moved from the first posture, The second hole is connected to the third hole so that the second hole communicates with the third hole even if the second surface is rotated to a second posture facing upward from the first surface. 7. The mounting unit according to any one of appendices 4 to 6, wherein the mounting unit is formed in an elongated hole surrounding the first hole or arranged on an arc surrounding the first hole. .

(Appendix 8)
A top plate for receiving the device and a pair of left and right side plates, each of the pair of left and right side plates having a first hole formed on the same shaft and the first hole; A mounting member having a second hole formed in the center of the arc-shaped slot or arranged on the arc;
A support member that is disposed inside each of the pair of left and right side plates and has a third hole that communicates with the second hole;
A hinge member that connects the placement member and the support member so that the placement member can rotate about the one horizontal axis with respect to the support member;
A standing member standing on the outside of each of the pair of left and right side plates;
A first fastener that is supported by the standing member and is inserted into the first hole so that the placing member is rotatably supported by the standing member;
A second member that is supported by the standing member and is inserted into both the second hole and the third hole, so that the placing member and the supporting member are supported by the standing member in a non-rotatable manner. A mounting unit.

(Appendix 9)
The mounting unit according to appendix 8, wherein the hinge member is a member that supports the mounting member in an arbitrary rotational posture with respect to the support member by friction.

(Appendix 10)
The upright members are formed at different heights at a pitch that is a fraction of an integer of the distance between the first hole and the second hole, and the first fastener and the second A plurality of protrusions capable of supporting any of the fasteners;
Supplementary note 8 wherein the first fastener and the second fastener are respectively supported by any two protrusions separated from each other by the distance among the plurality of protrusions. Or the mounting unit of 9.

(Appendix 11)
Each of the plurality of protrusions has a hook shape that extends forward and further bends upward, and the plurality of protrusions are arranged in respective positions that are lowered in the vertical direction and upward in the rearward direction. 10. The mounting unit according to 10.

(Appendix 12)
In the first posture in which the first surface of the top plate faces upward from the second surface, the second hole communicates with the third hole, and the mounting member is moved from the first posture, The second hole is connected to the third hole so that the second hole communicates with the third hole even if the second surface is rotated to a second posture facing upward from the first surface. The mounting unit according to any one of appendices 8 to 11, wherein the mounting unit is formed in an elongated hole surrounding the first hole in an arc shape, or arranged on an arc surrounding the first hole. .

1, 1A mounting unit 10, 10A mounting member 11, 11A, 51, 55 Top plate 12, 12A Side plate 12a Inner surface 20, 20A Support member 21 Arm 22, 22A Support bar 30 Hinge member 31 Rotating shaft 32 Bearing 40 Support mechanism 41, 42 Fasteners 43, 54, 54A Stand 52 Top plate extension parts 53 Base 60 Document 61 Keyboard 62 Notebook PC
111 steps 112 holes 113A openings 121, 211 screw holes 122, 122A, 122A ′ long holes 128A first plate 129A second plate 421 knob 431 base 432 standing plate 433 support portion 434 protrusion

Claims (7)

A mounting member for receiving the mounting object;
A support member for supporting rotation of the mounting member,
A hinge member connecting the mounting member and the support member, the mounting member being rotatable with respect to the support member;
A first support portion that rotatably supports the center of rotation of the mounting member; and a support mechanism that includes the mounting member and a second support portion that supports the support member in a non-rotatable manner. A mounting unit characterized by:   The mounting unit according to claim 1, wherein the hinge member is a member that supports the mounting member by friction in an arbitrary rotation posture with respect to the support member. The mounting member has a top plate for receiving the mounting object,
The second support portion supports the mounting member and the support member in a non-rotatable and unsupportable manner in a first posture in which the first surface of the top plate faces upward from the second surface, In addition, the mounting member is also mounted in the second position when the mounting member is rotated from the first position to the second position in which the second surface faces upward from the first surface. The mounting unit according to claim 1 or 2, wherein the mounting member and the supporting member are supported so as not to rotate and to be able to release the support. The mounting member includes a top plate for receiving the placement object and a pair of left and right side plates, and each of the pair of left and right side plates includes a first hole formed on the same shaft. A member having a second hole formed in an arc-shaped elongated hole centered on the first hole or arranged on the arc,
The support member is a member formed on the inner side of each of the pair of left and right side plates and formed with a third hole communicating with the second hole,
The hinge member is a member that connects the mounting member and the support member so that the mounting member can rotate about the one horizontal axis with respect to the support member,
The support mechanism is
A standing member standing on the outside of each of the pair of left and right side plates;
A first fastener that is supported by the standing member and is inserted into the first hole so that the placing member is rotatably supported by the standing member;
A second member that is supported by the standing member and is inserted into both the second hole and the third hole, so that the placing member and the supporting member are supported by the standing member in a non-rotatable manner. The mounting unit according to any one of claims 1 to 3, further comprising: a fastener. The upright members are formed at different heights at a pitch that is a fraction of an integer of the distance between the first hole and the second hole, and the first fastener and the second A plurality of protrusions capable of supporting any of the fasteners;
The said 1st fastener and the said 2nd fastener are each supported by the arbitrary 2 protrusions which mutually left | separated the said distance among these protrusions. 4. The mounting unit according to 4.   Each of the plurality of protrusions has a hook shape that extends forward and further bends upward, and the plurality of protrusions are arranged at respective positions that are lowered rearward in the vertical direction and upward. Item 6. The mounting unit according to Item 5.   In the first posture in which the first surface of the top plate faces upward from the second surface, the second hole communicates with the third hole, and the mounting member is moved from the first posture, The second hole is connected to the third hole so that the second hole communicates with the third hole even if the second surface is rotated to a second posture facing upward from the first surface. The mounting according to any one of claims 4 to 6, wherein the mounting is formed in a long hole surrounding the first hole in an arc shape or arranged on an arc surrounding the first hole. unit.

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