JP2011182877A - Auxiliary top board and furniture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary top board capable of being stably attached to a top board of furniture while suppressing the working man-hours and working cost, and capable of improving the convenience for a user of the furniture. <P>SOLUTION: The auxiliary top board 20 is fixed to the top board 12 of the furniture 10 by a fixing member 22. The auxiliary top board 20 is firmly fixed to the top board 12 in the front and rear direction by holding a front end face 12a and a locking face 15 of the top board 12 between an orthogonally crossing flat board part 22b and a collar 27 of the fixing member 22. The auxiliary top board 20 has a projecting part 23 projecting downward at the front end. The user can make such motions as pulling the user's body to the auxiliary top board 20 side by gripping the projecting part 23. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an auxiliary tabletop for furniture used in offices and public facilities, and furniture equipped with the same.

In fixtures such as desks, counters, and tables used in office spaces such as offices and public facilities, it is sometimes necessary to expand the plane on the top board.
For example, when a wheelchair user uses a fixture such as a table or counter, a large gap is generated between the wheelchair user and the top of the fixture because the armrest of the wheelchair interferes with the end of the top of the fixture. May end up. Then, wheelchair users have to bend their upper body in order to work effectively using the top board, and it is inconvenient to sit on the top board. Sometimes it disappeared. Moreover, not only for wheelchair users, for example, there is a case where it is desired to secure a wide work area on the top board. Then, in such a case, the auxiliary top plate with which it mounts | wears with the top plate of a fixture so that it may protrude in a user side rather than the edge part of a top plate is proposed (for example, refer patent documents 1-3).

  As described in Patent Documents 1 and 2, such an auxiliary top plate is generally attached to a fixture by sandwiching the top edge of the top plate using a clamp device provided on the lower surface of the auxiliary top plate. According to such a structure, although it is a simple structure, it is supposed that an auxiliary top plate can be firmly fixed with respect to the load of an up-down direction.

Utility Model Registration No. 3079854 JP-A-8-117295 JP 2007-75286 A

  However, in order to change the posture during use and the relative positional relationship with the fixture, a fixture user (especially a wheelchair user) may perform an operation of grasping the front edge of the top plate and pulling the body toward the fixture side. is there. In this case, in the structure described above, the clamping force of the clamping device in the thickness direction (vertical direction) of the top plate is clamped against the force along the front-rear direction of the top plate that acts on the auxiliary top plate to attract the body. It is countered only by the friction force generated between the device and the top plate. For this reason, there is a risk that the auxiliary top plate may be displaced due to a decrease in tightening force due to loosening of screws due to secular change, the auxiliary top plate may fall off the top plate, and the body may not be drawn well. .

Therefore, a screw hole is drilled in the lower surface of the top plate of the fixture, and a mounting screw is screwed into the screw hole through a through hole provided in the bracket provided on the lower surface of the auxiliary top plate. There is a method of fixing the auxiliary top plate (see Patent Document 3).
According to this method, even when an attractive force in the front-rear direction is applied to the auxiliary top plate, the auxiliary top plate can be stably supported. However, in this method, since it is necessary to process a screw hole in the fixture top plate, the mounting position of the auxiliary top plate is limited. In the case where it is desired to change the mounting position along the front edge of the fixture top plate, it is necessary to drill a plurality of screw holes in the top plate, and there is a problem that the processing man-hours and processing costs are increased. .

  In the techniques described in Patent Documents 1 to 3, since the mounting screw protrudes downward, the mounting screw may interfere with a user or a wheelchair. Furthermore, this interference also leads to the occurrence of loosening of the mounting screw.

  An object of the present invention made there is an auxiliary top plate that can be stably attached to a fixture top plate while suppressing an increase in processing man-hours and processing costs, and can improve the usability of the fixture user. Is to provide fixtures.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is an auxiliary top plate that can be mounted on a fixture equipped with a top plate, and is arranged on the top surface of the top plate of the fixture, and the auxiliary top plate main body is fixed to the top plate of the fixture. A fixing member that is fixed to the lower surface of the auxiliary top plate main body, and is fixed to the top plate side by contacting the outer peripheral end surface of the top plate connected to the first fixing portion. A first movement restricting portion for restricting the movement of the auxiliary top plate body facing the plate, a plate portion connected to the first movement restricting portion and extending inward from the outer peripheral end surface of the top plate along the lower surface of the top plate; , Formed on the top of the plate, and formed on the top plate of the fixture, and then against the locking surface facing away from the outer peripheral end surface of the top plate, thereby restricting the movement of the auxiliary top plate body toward the outside of the top plate And a second movement restricting portion that is capable of moving forward and backward in a direction approaching and separating from the lower surface of the top plate of the fixture. , A second fixing portion for fixing the top plate fixing member by being pressed against the, characterized in that it comprises a.
Here, the locking surface can be formed by forming the inner thickness of the top plate smaller than the outer thickness of the top plate. Also, the locking surface can be formed by forming a recess or groove on the lower surface of the top plate.

In such an auxiliary top plate, in addition to fixing the auxiliary top plate to the top plate via the fixing member at the first fixing portion and the second fixing portion, the first top portion is connected to the outer peripheral end surface and the step portion of the top plate. When the movement restricting portion and the second movement restricting portion come into contact with each other, the movement of the auxiliary top plate in the inner and outer directions of the top plate can be restricted.
The auxiliary top plate can be firmly fixed to the top plate by sandwiching the outer peripheral end surface and the locking surface of the top plate by the first movement restricting portion and the second movement restricting portion. Further, if the distance between the first movement restricting portion and the second movement restricting portion is set larger than the distance between the outer peripheral end surface of the top plate and the locking surface, the outer periphery of the first movement restricting portion and the top plate A gap can be secured between the end surface, the second movement restricting portion, and the locking surface, and the auxiliary top plate can be slid inward and outward relative to the top plate within the range of the gap. .
Moreover, since the second fixing portion fixes the fixing member to the top plate by being pressed against the top plate, there is no need to process the top plate side, and the auxiliary top plate can be easily attached to the top plate. . Such a second fixing portion is preferably pressed against the top plate with a screw or the like.

The second movement restricting portion may have any configuration. For example, the second movement restricting portion is provided between the protruding plate portion protruding from the locking surface toward the inside of the top plate, and between the protruding plate portion and the top plate. And a stopper facing the stop surface.
A plurality of holes for attaching the stopper may be provided in the protruding plate portion with a gap in the protruding direction of the protruding plate portion, so that the mounting position of the stopper with respect to the protruding plate portion by screws or the like can be adjusted.
Moreover, the hole which attaches a stopper can be made into a long hole extended toward the protrusion direction of a protrusion plate part, and the attachment position of the stopper with respect to the protrusion plate part by a screw | thread etc. can also be adjusted.
In this way, by making it possible to adjust the mounting position of the stopper with respect to the protruding plate portion, the amount of sliding of the auxiliary top plate to the inside and outside of the top plate and the amount of protrusion of the auxiliary top plate from the top plate to the outside are appropriately adjusted. Can be set to
In addition, the stopper can be installed in the direction of approaching and moving away from the bottom surface of the top plate by attaching it to the fixing member with screws, etc., and the fixing member is fixed to the top plate by being pressed against the top plate. It can be made to function as a second fixing portion. Of course, the stopper may be provided independently of the second fixing portion.

  The second movement restricting portion may be formed continuously from the plate portion along the lower surface of the top plate, and may be formed from an opposing plate portion connected to the plate portion and locked to the locking surface.

  In the auxiliary top plate main body, a protruding portion extending downward from the auxiliary top plate main body can be formed at a position protruding outward from the top plate. As a result, the user can grab the protrusion and move his / her body closer to or away from the auxiliary top plate.

The present invention can also be a fixture comprising the above-described auxiliary top plate, a top plate on which the auxiliary top plate is mounted, and a support member that supports the top plate.
In this case, the locking surface for restricting the movement of the auxiliary top plate in the direction toward the outside of the top plate is formed so that the thickness of the outer side of the top plate is larger than the thickness of the inner side of the top plate. It can be formed at a location where the thickness changes.
Further, the locking surface can be formed by forming a recess or a groove on the lower surface of the top plate.

According to the present invention, in addition to fixing the auxiliary top plate to the top plate with the first fixing portion and the second fixing portion of the fixing member, the first movement restricting portion and the second movement restricting portion The movement of the auxiliary top plate in the inner and outer directions of the plate can be restricted. Thereby, an auxiliary top plate can be firmly attached with respect to a top plate.
Moreover, since the second fixing portion fixes the fixing member to the top plate by being pressed against the top plate, there is no need to process the top plate side, and the auxiliary top plate can be easily attached to the top plate. .
Thereby, an auxiliary top plate can be stably attached to the top plate of the fixture while suppressing an increase in processing man-hours and processing costs.

  Further, by arranging the second fixing portion on the inner side of the top plate with respect to the locking surface of the top plate, it is possible to prevent the heads such as bolts used as the second fixing portion from protruding below the top plate. be able to. As a result, it is possible to prevent the bolt or the like as the second fixing portion from interfering with the user or the wheelchair, and further to prevent loosening of the bolt or the like due to the interference.

  In addition, the distance between the first movement restricting part and the second movement restricting part can be set larger than the distance between the outer peripheral end surface of the top plate and the locking surface, and the stopper mounting position on the protruding plate part can be adjusted. By doing so, it is possible to appropriately set the sliding amount of the auxiliary top plate in the inner and outer directions with respect to the top plate and the protruding amount to the outside. Thereby, the usability of the user of the furniture can be improved.

It is a perspective view which shows an example of the fixture provided with the auxiliary top plate of this invention. It is a perspective view which shows the attachment state of an auxiliary | assistant top plate when the top plate of a fixture is seen from the downward direction. It is sectional drawing which shows the attachment structure to the top plate of an auxiliary top plate. It is a perspective view which shows the structure of a 2nd fixing | fixed part. It is a figure which shows the other example of the attachment structure to the top plate of an auxiliary | assistant top plate, Comprising: In order to enable an auxiliary | assistant top plate to slide in the front-back direction, the cross section of the structure provided with the clearance gap between the latching surface and the stopper FIG. It is a figure which shows the other example of the attachment structure to the top plate of an auxiliary | assistant top plate, Comprising: It is sectional drawing of the structure which made it possible to change the attachment position of the stopper to a protrusion plate part. It is a figure which shows the other example of the attachment structure to the top plate of an auxiliary | assistant top plate, Comprising: It is sectional drawing which shows a structure in case the opposing plate part formed by bend | folding a fixing member is abutted on a locking surface. It is a figure which shows the other example of the attachment structure to the top plate of an auxiliary | assistant top plate, Comprising: It is sectional drawing which shows the structure which formed the fixing member in the U shape. It is sectional drawing which shows the example at the time of forming a groove | channel or a recessed part in order to form a locking surface in a top plate. It is the perspective view which looked at the top plate of the fixture from the lower part at the time of forming a latching surface by forming a crevice in a top plate.

  Hereinafter, the best mode for carrying out an auxiliary top plate and a fixture according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited only to these examples.

  FIG. 1 is a perspective view of a fixture 10 provided with a top plate 12 such as a desk device or a counter in the present embodiment. In the following description, directions such as “upper”, “lower”, “front”, and “rear” are directions corresponding to the state when the fixture 10 is installed and used on the floor surface. That is, the floor side on which the fixture 10 is installed is “downward”, the opposite direction is “upward”, the side where the user using the fixture 10 faces the fixture 10 is “front”, and the opposite side is “rear”. Called.

  As shown in FIG. 1, the fixture 10 is supported at a predetermined height above the floor surface by a pair of supports 11 and 11 rising on the floor surface on which the fixture 10 is installed, and these supports 11 and 11. The top plate 12 is provided.

  Here, as the support body 11, support legs of various shapes, a sleeve box provided with a drawer, or the like can be adopted. Moreover, the support body 11 is not restricted to two, You may provide three or more. For example, when attaching the top plate 12 to a wall surface or a partition, a substantially L-shaped metal fitting or the like can be used as the support 11.

As shown in FIGS. 2 and 3, an auxiliary top plate 20 is mounted on the top surface of the top plate 12 of the fixture 10.
The auxiliary top plate 20 includes a plate-shaped auxiliary top plate main body 21 provided along the upper surface of the top plate 12 and a fixing member 22 for fixing the auxiliary top plate main body 21 to the top plate 12 of the fixture 10. ing.

  The auxiliary top plate main body 21 includes a protruding portion 23 that protrudes downward at the front end portion. The protrusion 23 can be held and held by the user's hand to draw the user's body toward the fixture 10 side. The protruding portion 23 may have any shape and configuration. For example, a bar that can be grasped by the user may be provided as the protruding portion 23.

  The fixing member 22 is formed by bending a belt-like plate extending in one direction into a crank shape as a whole. Movement restricting portion) 22b and a second flat plate portion (plate portion) 22c which is bent at a right angle at the tip of the orthogonal flat plate portion 22b and extends in a direction parallel to the first flat plate portion 22a and away from the first flat plate portion 22a. Are continuously connected to each other.

  As shown in FIG. 3, the first flat plate portion 22a hits the lower surface of the auxiliary top plate main body 21, and, for example, two through holes 24 are formed in the direction in which the first flat plate portion 22a continues. The first flat plate portion 22 a is fixed to the auxiliary top plate main body 21 by screwing the screws 25 into the lower surface of the auxiliary top plate main body 21 through the through holes 24.

  The orthogonal flat plate portion 22b is fixed by contacting the front end surface (outer peripheral end surface) 12a of the top plate 12 from the front side (outside) of the top plate 12 with the first flat plate portion 22a fixed to the auxiliary top plate main body 21. The movement of the member 22 to the rear side (inside the top plate 12) is restricted.

  In the top plate 12, a locking surface 15 facing the opposite side to the front end surface 12a is formed at a certain length from the front end surface 12a toward the rear side (inside the top plate 12). The locking surface 15 is formed at a location where the thickness of the top plate 12 is reduced on the rear side (inside) with respect to the front side (outside) of the top plate 12 and the thickness changes. Thereby, the lower surface 12b of the top plate 12 is formed so that the rear side 12b-R is positioned above the front side 12b-F of the locking surface 15.

The second flat plate portion 22c is arranged along the front side 12b-F of the locking surface 15 with respect to the lower surface 12b of the top plate 12 from the front end surface 12a (outside) of the top plate 12 to the rear side ( It is provided to extend toward the inside.
Continuing from the second flat plate portion 22c, a protruding plate portion 22s protruding rearward from the locking surface 15 (inside the top plate 12) is formed.

As shown in FIG. 4, the protruding plate portion 22s is formed with a screw hole 26 penetrating the front and back. In the protruding plate portion 22 s, a block-shaped collar (stopper) 27 is disposed on the upper side facing the top plate 12. The collar 27 is formed with a screw hole 28 having a predetermined depth on the side facing the protruding plate portion 22s. The collar 27 is attached to the projecting plate portion 22 s by screwing the female screw 29 into the screw hole 26 of the projecting plate portion 22 s and the screw hole 28 of the collar 27. Here, by using the female screw 29, it is avoided that a protrusion is formed below the protrusion plate portion 22s.
The collar 27 is formed with a screw hole 26 and a screw hole 28 so as to abut against the locking surface 15 of the top plate 12 from the rear side (inside the top plate 12). When the collar 27 abuts against the locking surface 15 from the rear side, it functions as a second movement restricting portion that restricts the movement of the fixing member 22 toward the front side (outside of the top plate 12).

  In this way, the auxiliary top plate 20 is fixed to the top plate 12 of the fixture 10 by the fixing member 22 and the collar 27. Here, by sandwiching the front end surface 12 a and the locking surface 15 of the top plate 12 between the fixing member 22 and the collar 27, the auxiliary top plate 20 can be firmly fixed to the top plate 12 in the front-rear direction. In this case, since it is not particularly necessary to machine the screw holes in the top plate 12, the auxiliary top plate 20 can be easily and reliably fixed to the top plate 12 of the fixture 10 with a simple structure. .

  Further, the auxiliary top plate 20 is provided with a projecting portion 23 projecting downward at a position projecting forward (outside) from the front end portion of the top plate 12, so that the user can use the projecting portion 23. It is possible to perform an operation of grasping and pulling the body toward the auxiliary top plate 20 side. Also at this time, since the front end surface 12a of the top plate 12 and the locking surface 15 are sandwiched between the fixing member 22 and the collar 27, the auxiliary top plate 20 is firmly fixed to the top plate 12 in the front-rear direction. Therefore, the operation of pulling toward the auxiliary top plate 20 can be performed stably.

  In the above embodiment, the collar 27 can be provided so as to be pressed against the lower surface 12b of the top plate 12 on the rear side 12b-R of the locking surface 15. Thereby, the top plate 12 is sandwiched between the auxiliary top plate body 21 and the collar 27, and the binding force for fixing the auxiliary top plate 20 in the front-rear direction can be increased by the frictional force.

(Other embodiments)
The present invention is not limited to the above-described embodiments described with reference to the drawings, and various modifications are conceivable within the technical scope thereof.
For example, in the above embodiment, the front end surface 12a and the locking surface 15 of the top plate 12 are sandwiched between the fixing member 22 and the collar 27, but as shown in FIG. The collar 27 may be provided at a position separating a gap between the collar 27 and the locking surface 15 in a state where the front end surface 12a of the top plate 12 is abutted.
According to such a configuration, the auxiliary top plate 20 is used by being drawn forward (front side as viewed from the user) with respect to the top plate 12 until the collar 27 abuts against the locking surface 15 from the rear side. Is possible. Also in this case, the auxiliary top plate 20 can be reliably prevented from sliding with a sliding amount of a certain level or more by the front end surface 12a of the top plate 12, the fixing member 22, the locking surface 15 and the collar 27. Further, if the collar 27 is pressed against the lower surface 12b of the top plate 12, the auxiliary top plate 20 can be fixed to the top plate 12 at an arbitrary position within the sliding range, and the auxiliary top plate 20 projects forward from the top plate 12. The amount can be adjusted accordingly.

  Further, as shown in FIG. 6A, the collar 27 is attached to the fixing member 22 by forming a plurality of screw holes 26 at intervals along the longitudinal direction in the protruding plate portion 22 s of the fixing member 22. You may enable it to select a position. Accordingly, it is possible to appropriately select and set the slide amount in the front-rear direction and the forward protrusion amount of the auxiliary top plate 20 with respect to the top plate 12 within a larger range than the configuration of FIG.

  As shown in FIG. 6B, instead of the screw hole 26, a long hole 30 is formed in the protruding plate portion 22s along the longitudinal direction of the protruding plate portion 22s, and the bolt 30 is passed through the long hole 30. The collar 27 can be attached to the fixing member 22 by screwing 31 into the screw hole 28 of the collar 27. Also in this case, the position of the collar 27 can be arbitrarily set within the range of the long hole 30, and the amount of sliding of the auxiliary top plate 20 with respect to the top plate 12 in the front-rear direction and the forward protrusion amount can be set as appropriate. Can do.

  In this case, instead of the bolt 31, the grub screw 29 can be used as in the configuration of FIG. 3, but in order to securely fix the collar 27 to the fixing member 22, the bolt 31 is used and the head of the bolt 31 is used. It is preferable that the fixing member 22 is sandwiched between the portion 31 a and the collar 27. However, in that case, the head portion 31a of the bolt 31 protrudes downward.

Of course, not only the case of FIG. 6B but also the bolt 31 can be used instead of the grommet 29. In that case, in order to avoid the head 31a of the bolt 31 from protruding downward, as shown in FIG. 7, the second orthogonal extending rearward of the locking surface 15 and orthogonal to the second flat plate portion 22c. A flat plate portion (opposing plate portion, second movement restricting portion) 22d is formed continuously with the second flat plate portion 22c, and a third flat plate portion 22e extending rearward orthogonally from the upper end portion of the second orthogonal flat plate portion 22d. Is preferably formed. As a result, the third flat plate portion 22e to which the collar 27 is fixed is positioned above the second flat plate portion 22c, and the head portion 31a of the bolt 31 protrudes below the second flat plate portion 22c. Can be prevented.
In this case, since the second orthogonal flat plate portion 22d abuts against the end surface 15a of the locking surface 15 from the rear side (inside) of the top plate 12, the forward movement of the auxiliary top plate 20 can be restricted. Also in this case, the second orthogonal flat plate portion 22d may be provided with a gap between the end surface 15a of the locking surface 15 and the second orthogonal flat plate portion 22d.

  Further, the fixing member 22 is not limited to the crank-shaped configuration shown in the above embodiments. For example, as shown in FIG. 8, the first flat plate portion 22a ′ is sandwiched between the lower surface of the auxiliary top plate 20 and the upper surface of the top plate 12, and the first flat plate portion 22a ′, the orthogonal flat plate portion 22b, and the second It is also possible for the flat plate portion 22c to be U-shaped as a whole. Such a configuration can be similarly applied to the configurations shown in FIGS.

Moreover, although the locking surface 15 was formed by making the plate | board thickness of the front-end part side rather than the locking surface 15 in the top plate 12 larger than the part behind the locking surface 15, it is restricted to this. is not. For example, as shown in FIG. 9, the locking surface 15 can also be formed by forming a recess 16 on the lower surface 12 b of the top plate 12 at a position on the rear side from the front end surface 12 a by a certain length. Here, the recess 16 may have a groove shape that is continuous in the width direction of the top plate 12 (the width direction of the fixture 10), or a fixing member 22 is provided in the width direction of the top plate 12 as shown in FIG. You may form only in a position. In the latter case, the position of the fixing member 22 in the width direction of the top plate 12 can be defined.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

10 furniture 11 support 12 top plate 12a front end surface (outer peripheral end surface)
12b Lower surface 15 Locking surface 16 Recess 20 Auxiliary top plate 21 Top plate main body 22 Fixing member 22a First flat plate portion 22b Orthogonal flat plate portion (first movement restricting portion)
22c 2nd flat plate part (plate part)
22d 2nd orthogonal flat plate part (opposite plate part, 2nd movement control part)
22e Third flat plate portion 22s Protruding plate portion 23 Protruding portion 24 Through hole 26 Screw hole 27 Collar (stopper)
30 long hole

Claims (10)

An auxiliary top plate that can be attached to a fixture equipped with a top plate,
An auxiliary top plate body disposed on the top surface of the top plate of the fixture,
A fixing member for fixing the auxiliary top plate body to the top plate of the fixture,
The fixing member is a first fixing portion fixed to the lower surface of the auxiliary top plate body;
A first movement restricting portion that is connected to the first fixing portion and restricts movement of the auxiliary top plate main body toward the top plate side by striking the outer peripheral end surface of the top plate;
A plate portion connected to the first movement restriction portion, extending along the lower surface of the top plate, and extending inward from the outer peripheral end surface of the top plate;
The auxiliary top plate which is formed above the plate portion and which is formed on the top plate of the fixture and faces the outer surface of the top plate by facing a locking surface facing the outer peripheral end surface of the top plate. A second movement restricting portion for restricting movement of the main body;
A second fixing portion that is provided so as to be able to advance and retreat in a direction approaching and separating from the lower surface of the top plate of the fixture, and is fixed to the top plate by being pressed against the top plate;
An auxiliary top plate characterized by comprising: The second movement restricting portion is continuous with the plate portion along the lower surface of the top plate, and a protruding plate portion protruding toward the inside of the top plate from the locking surface;
The auxiliary top plate according to claim 1, further comprising: a stopper provided between the protruding plate portion and the top plate and facing the locking surface.   A plurality of holes for attaching the stopper are provided in the projecting plate part at intervals in the projecting direction of the projecting plate part, and the mounting position of the stopper with respect to the projecting plate part is adjustable. The auxiliary top plate according to claim 2.   The hole for attaching the stopper is a long hole extending in the protruding direction of the protruding plate portion, and the mounting position of the stopper with respect to the protruding plate portion is adjustable. Auxiliary top plate.   The stopper is provided so as to be able to advance and retreat in a direction approaching and separating from the lower surface of the top plate with respect to the projecting plate portion, and by pressing the stopper against the top plate, the fixing member serves as the second fixing portion. The auxiliary top plate according to any one of claims 2 to 4, wherein the top plate is fixed to the top plate.   The second movement restricting portion is formed of an opposing plate portion formed continuously with the plate portion along the lower surface of the top plate and connected to the plate portion and locked to the locking surface. The auxiliary top plate according to claim 1.   6. The projecting portion extending downward from the auxiliary top plate main body is formed at a position projecting outward from the front end portion of the top plate in the auxiliary top plate main body. The auxiliary top plate according to claim 1. The auxiliary top plate according to any one of claims 1 to 7,
A top plate on which the auxiliary top plate is mounted;
And a support member for supporting the top plate.   9. The locking surface is formed at a location where the thickness changes by forming the outer thickness of the top plate larger than the inner thickness of the top plate. Fixtures.   The fixture according to claim 8, wherein the locking surface is formed by forming a recess or a groove on a lower surface of the top plate.

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