JP7165316B2 - Support base and anti-rotation member - Google Patents

Description

The present invention provides a support base comprising a support for supporting an object to be supported, a leg for receiving the load of the support, and a connecting member for connecting the leg to the support. The present invention relates to a member and its manufacturing method.

Conventionally, there is a support base in which a leg is connected to a support by a connecting member. For example, Patent Literature 1 below discloses a desk as the support base. This desk comprises a main body as a "supporting part" having a top plate and side plates, legs as "legs" that receive the load of the main body, and bolts as "connecting members" that connect the legs to the main body. ing. In this desk, each of the two legs is fixed to the main body using two bolts and two nuts screwed thereon. In this desk, when adjusting the height of the main body, the bolts and nuts are removed from the elevating holes provided in the legs, and after the height of the main body is adjusted, the bolts are inserted into other elevating holes. screwed into the nut.

JP 2015-6251 A

In the desk described in Patent Document 1, in order to fix the two legs to the main body, each of the four bolts must be screwed with a nut, which takes time to assemble the desk. was there. In addition, desks used in schools need to be adjusted in height according to the height and preferences of the children each time the grade changes. However, since the work is concentrated in a short period of time (for example, March), there is a problem that the work load becomes too large.

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and provides a support base that can be easily assembled in a short time, a rotation prevention member that prevents the rotation of a support portion that constitutes the support base, and a method for manufacturing the same. intended to provide

In order to achieve the above object, the support base of the present invention is characterized by: a support portion that has two first through holes that are vertically spaced apart and directed in the horizontal direction, and that supports an object to be supported; It has two second through-holes corresponding to the two first through-holes, and is inserted into one of the first through-holes and one of the second through-holes, and the leg portion that receives the load of the support portion. a connecting member that has a rod-shaped male threaded portion that is threaded and a female threaded portion that is screwed into the male threaded portion, and connects the leg portion to the support portion; a rotation prevention member for preventing rotation, the rotation prevention member being provided in a main body fixed to one of the support portion and the leg by the connection member; It has a first through hole and a pin to be inserted into the other second through hole.

In this configuration, the male threaded portion of the connecting member is inserted into one of the first through holes and the one of the second through holes, and the female threaded portion is screwed into the male threaded portion, whereby the leg portion is attached to the support portion. It is connected. Further, a pin of a rotation preventing member is inserted into the other first through hole and the other second through hole, thereby allowing the support portion to rotate about the male screw portion with respect to the leg portion. is blocked. Since the body portion provided with the pin of the rotation preventing member is fixed to one of the support portion and the leg portion by the connecting member, the pin is unlikely to fall out of the other first through hole and the other second through hole. . At least two of each of the first through-holes and the second through-holes should be formed, and the number of each of the first through-holes and the second through-holes is not limited to two.

In this configuration, since the pin of the rotation preventing member is inserted into the other first through hole and the other second through hole, it is not necessary to insert the male screw portion. Therefore, it is possible to omit the trouble of screwing the male threaded portion into the female threaded portion, and it is possible to easily assemble the support base in a short time.

Another feature of the present invention is that the pin has a contact portion that contacts one surface of the body portion .

In these cases, when a set of two of the first through holes is set as a first set and a set of two of the second through holes is set as a second set, one of the first set and the second set is the other. It is possible to displace a plurality of them in the vertical direction so that they can correspond to different heights. With this configuration, the height of the support can be adjusted. For example, when a plurality of first pairs are provided on the support portion, the height of the support portion can be increased by making the second pair provided on the leg correspond to one selected from the plurality of first pairs. can be adjusted. On the other hand, when the legs are provided with a plurality of second pairs, the height of the support portion can be increased by making the first pair provided on the support correspond to one selected from the plurality of second pairs. can be adjusted. Moreover, in this configuration, the number of connecting members can be reduced to half compared to the prior art disclosed in Patent Document 1, so that the work load for height adjustment work can be greatly reduced.

In these cases , the main body portion has a through hole through which the male screw portion is inserted, and the male screw portion can have a head portion that abuts on the main body portion.

With this configuration, the main body can be fixed by pressing against one of the support and the leg with the head of the male screw.

In these cases , the gap width between the support portion and the leg portion at the height of the first through hole on the upper side is defined as the upper gap width, and the support portion and the leg at the height of the first through hole on the lower side. When the upper clearance width is wider than the lower clearance width, the male threaded portion is inserted into the upper first through hole and the upper second through hole. Further, when the lower gap width is wider than the upper gap width, the male screw portion may be inserted into the lower first through hole and the lower second through hole.

In this configuration, the upper gap width and the lower gap width are compared, and when the upper gap width is wide, the male screw portion is arranged on the upper side and the pin is arranged on the lower side. On the other hand, when the width of the lower gap is wide, the male screw portion is arranged on the lower side and the pin is arranged on the upper side. That is, on the side where the gap width is wide, the leg portion is closely attached to the support portion by the connecting member and connected. Therefore, it is possible to effectively eliminate the gap between the support portion and the leg portion.

In order to achieve the above object, the present invention is characterized by having two first through holes vertically spaced apart and facing in the horizontal direction, and supporting a support object; It has two second through holes corresponding to each of the first through holes, and has a leg part that receives the load of the support part, and a rod-shaped member that is inserted into one of the first through holes and one of the second through holes. and a female threaded portion screwed into the male threaded portion, and a connection member for connecting the leg portion to the support portion, wherein the rotation of the support portion about the male threaded portion A rotation preventing member for preventing movement, comprising: a main body portion fixed to one of the support portion and the leg portion by the connecting member; It has a hole and a pin to be inserted into the other second through hole, and the pin has a contact portion that contacts one surface of the body portion .

In the support base, the male threaded portion of the connecting member is inserted into one of the first through holes and the one of the second through holes, and the female threaded portion is screwed into the male threaded portion so that the leg portion is attached to the support portion. It is connected. The pin of the rotation preventing member is inserted into the other first through hole and the other second through hole. As a result, it is possible to prevent the rotation of the support portion about the male screw portion. Since the body portion provided with the pin of the rotation preventing member is fixed to one of the support portion and the leg portion by the connecting member, the pin is unlikely to drop out of the other first through hole and the other second through hole.

Moreover, even if the male threaded portion is inserted into the other first through hole and the other second through hole at the time of shipment from the factory, the male threaded portion may loosen and fall off after long-term use. In this case, the support base can be easily repaired in a short period of time by using the rotation preventing member in place of the dropped male threaded portion.

In these cases, the pin is provided with a first portion disposed inside the other first through hole and the other second through hole, and extending forward from the tip of the first portion. and a second portion, the diameter of the second portion being smaller than the diameter of the first portion.

In this configuration, since the diameter of the second portion is smaller than that of the first portion, the small-diameter second portion is used as a guide when inserting the pin through the first through-hole and the second through-hole. can be easily inserted. Therefore, it is possible to narrow the width of the gap between the outer surface of the first portion and the inner surface of each of the first through hole and the second through hole, thereby suppressing rattling of the pin due to this gap.

In these cases , the body portion may have a through hole through which the male screw portion is inserted, and the male screw portion may have a head portion which abuts on the body portion.

With this configuration, the main body can be fixed by pressing against one of the support and the leg with the head of the male screw.

In these cases , the method of manufacturing the rotation preventing member comprises: (a) forming the main body portion having the pin insertion hole by processing a metal plate material having a certain thickness; (c) one surface of the main body, forming the pin having a pin main body that is inserted into the pin insertion hole and a contact portion that abuts against one surface of the main body by processing a bar; The pin body can be inserted through the pin insertion hole from the side, and the contact portion can be welded to one surface of the body portion.

With this configuration, the rotation preventing member can be easily manufactured from the metal plate and the metal bar.

In these cases , in the step (b), the abutment surface of the abutment portion that abuts against one surface of the main body portion can be formed perpendicular to the pin body.

With this configuration, the pin main body can be arranged perpendicular to the other surface of the main body simply by welding the abutting surface of the abutting portion to one surface of the main body.

1 is a perspective view showing the configuration of a support base according to one embodiment of the present invention; FIG. FIG. 2 is an enlarged perspective view showing the configuration of the main part of the support base shown in FIG. 1; FIG. 2 is an enlarged cross-sectional view showing the configuration of the main part of the support base shown in FIG. 1; It is a figure which shows the structure of the rotation prevention member which concerns on one Embodiment of this invention, (A) is a left view, (B) is a front view, (C) is a right view. FIG. 3 is an exploded perspective view showing the configuration of a rotation preventing member according to one embodiment of the present invention; FIG. 4 is a cross-sectional view showing a method of fixing the leg to the support; FIG. 10 is a cross-sectional view showing how to use a rotation preventing member for a conventional support.

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates, referring drawings for embodiment of the support base which concerns on this invention, a rotation prevention member, and its manufacturing method. The directions of "front, rear, left, right, up, and down" used in the following description correspond to the directions indicated by the arrows in FIG.

(Configuration of support base 10)
FIG. 1 is a perspective view showing the configuration of a support base 10 according to one embodiment of the present invention. FIG. 2 is an enlarged perspective view showing the configuration of the main part of the support base 10. As shown in FIG. FIG. 3 is an enlarged cross-sectional view showing the configuration of the main part of the support base 10. As shown in FIG. Since the support 10 of the present embodiment is bilaterally symmetrical, the left side of the support 10 will be mainly described below.

As shown in FIG. 1, the support base 10 is a desk for children used in a school classroom or the like. A connection member 16 provided as a joint and a rotation prevention member 18 provided corresponding to each of the leg portions 14a and 14b.

As shown in FIG. 1, the support portion 12 is a portion that supports a support object (not shown) such as a textbook or a notebook, and is provided to extend downward from the top plate 20 and both left and right ends of the top plate 20. It has two hanging parts 22a and 22b. As shown in FIG. 2, the hanging portion 22a has a plurality of (eleven in this embodiment) first through holes 24, 24 . are provided.

As shown in FIG. 3, when connecting the leg portion 14a to the support portion 12 using the connection member 16, according to the height of the top plate 20 (FIG. 1) desired by the child, a plurality of first through holes are provided. Two first through holes 24, 24 are selected from the holes 24, 24 . In this embodiment, when one of the first through holes 24 is selected, the second through hole counted downward is automatically selected as the other first through hole 24 . Therefore, as shown in FIG. 2, if a set of two selectable first through holes 24, 24 is defined as a first set 26, a total of nine first sets 26 are provided in the support portion 12 (drooping portion 22a). are displaced in the vertical direction.

As shown in FIG. 1, each of the leg portions 14a and 14b is a portion that receives the load of the support portion 12, and has rod-shaped supports 30 and 30 that extend vertically. Each support 30, 30 is formed in a pipe shape having a square cross section and is connected to each other via a rod-shaped connecting portion 32 extending in the left-right direction.

As shown in FIG. 3, at the upper end portion 30a of the column 30, the right wall portion 36 is crushed leftward and overlapped with the left wall portion 38. As shown in FIG. The upper end portion 30a is provided with two second through holes 40, 40 which are vertically spaced apart and directed in the horizontal direction (left-right direction). The interval between the two second through holes 40 , 40 is determined to be the same as the interval between the two first through holes 24 , 24 that constitute the first set 26 provided in the support portion 12 . Therefore, when a set of two second through holes 40, 40 is a second set 42, the second set 42 is one first set selected from a plurality of (nine in this embodiment) first sets 26. 26.

As shown in FIG. 3, when the second set 42 corresponds to one selected first set 26, one (upper) first through-hole 24 and the second set 42 constituting the first set 26 are formed. and the other (lower) first through hole 24 forming the first set 26 and the other (lower) forming the second set 42 . It communicates with the second through hole 40 .

As shown in FIG. 3 , the connection member 16 includes a rod-shaped male screw portion 44 inserted into one (upper) first through hole 24 and one (upper) second through hole 40 and screwed into the male screw portion 44 . It has a female threaded portion 46 that is The male threaded portion 44 has a male threaded body 48 having a male thread 48a formed on its outer peripheral surface, and a head 50 provided at the proximal end of the male threaded body 48. The head 50 is fitted with a hexagonal wrench (see omitted) is provided.

The female threaded portion 46 has a female threaded body 54 having a female thread 54 a formed on its inner peripheral surface, and a bag portion 56 covering one opening of the female threaded body 54 . That is, the female threaded portion 46 of this embodiment is a so-called "cap nut". In this embodiment, two female threaded portions 46 , 46 are welded to the inner peripheral portions of the two second through holes 40 , 40 provided in the upper end portion 30 a of the column 30 . Thereby, the space inside each female screw portion 46 communicates with the corresponding second through hole 40 .

(Structure of Rotation Prevention Member 18)
4A and 4B are diagrams showing the configuration of the rotation preventing member 18 according to one embodiment of the present invention, where (A) is a left side view, (B) is a front view, and (C) is a right side view. FIG. 5 is an exploded perspective view showing the configuration of the rotation blocking member 18. As shown in FIG. The rotation prevention member 18 shown in FIG. 3 prevents rotation of the support portion 12 about the male screw portion 44. The main body portion 60 is fixed to the support portion 12 by the connection member 16, It has a pin 62 inserted into the hole 24 and the second through hole 40 . The body portion 60 and the pin 62 are made of metal such as iron and stainless steel so as to be weldable to each other.

As shown in FIGS. 4A, 4B, and 4C, the main body 60 is a plate-like member having a constant thickness and elongated in the vertical direction. Front-rear direction side edges 60a and 60b of the body portion 60 are formed in a straight line shape extending in the vertical direction, and up-and-down direction side edges 60c and 60d of the body portion 60 are formed in an arc shape bulging outward. . Both left and right side surfaces 60e and 60f of the body portion 60 are formed as smooth flat surfaces.

As shown in FIG. 5, a circular through-hole 64 through which the male threaded portion 44 of the connecting member 16 (FIG. 3) is inserted is formed in the front-back direction central portion of the upper portion of the main body portion 60 . A circular pin insertion hole 66 through which the pin 62 is inserted is formed in the front-rear direction central portion of the lower portion of the main body portion 60 . Furthermore, as shown in FIG. 4(A), around the through-hole 64 on one surface (left side surface) 60e of the main body 60 are the character "upper" indicating the proper orientation of the main body 60 and the male threaded portion 44 An arrow indicating the direction of turning the male threaded portion 44 and the characters "Shimaru" and "Yurum" indicating the effect of turning the male threaded portion 44 are described.

As shown in FIG. 5, the pin 62 includes a columnar pin body 68 inserted through the pin insertion hole 66 and a disk-shaped abutment portion 70 extending from the proximal end of the pin body 68 . have. The pin body 68 includes a columnar first portion 68a arranged inside each of the lower first through hole 24 and the lower second through hole 40 (FIG. 3), and the tip of the first portion 68a. and a second portion 68b extending forward from the . The outer diameter of the first portion 68a is formed to have a thickness that provides a slightly narrow clearance fit with respect to the inner diameters of the first through hole 24 and the second through hole 40 . The outer diameter of the second portion 68b is smaller than the diameter of the first portion 68a. It is formed to have a thickness that provides the same clearance fit (clearance) as each clearance with respect to the second through hole 40 .

The contact portion 70 is formed with a contact surface 70a that contacts one surface (left side surface) 60e of the main body portion 60. The contact surface 70a has a plurality of surfaces (in the present embodiment) that are melted during welding. Three protrusions 74 are formed at regular angular intervals (120 degrees in this embodiment) in the circumferential direction. The contact surface 70 a is formed as a flat surface perpendicular to the pin body 68 . Therefore, when the contact surface 70a contacts and is welded to one surface (left side surface) 60e of the body portion 60, the angle formed by the other surface (right side surface) 60f of the body portion 60 and the pin body 68 is inevitably becomes 90 degrees at

(Manufacturing method of rotation blocking member 18)
As shown in FIG. 5, when manufacturing the rotation preventing member 18, first, a metal plate (not shown) having a certain thickness is processed to form a main body having a through hole 64 and a pin insertion hole 66. forming part 60; Further, the pin 62 having the pin body 68 and the contact portion 70 is formed by processing a metal bar (not shown). Subsequently, the pin main body 68 is inserted into the pin insertion hole 66 from the one surface 60 e side of the main body portion 60 , and the contact surface 70 a of the contact portion 70 is brought into contact with the one surface 60 e of the main body portion 60 . Thereafter, the contact surface 70a of the contact portion 70 and the one surface 60e of the body portion 60 are joined by projection welding. Projection welding melts the plurality of projections 74 provided on the contact surface 70a, so that the contact surface 70a of the contact portion 70 can be joined to the one surface 60e of the main body portion 60 without gaps.

(Method for Assembling Support Base 10)
FIG. 6 is a cross-sectional view showing a method of fixing the leg portion 14a to the support portion 12. As shown in FIG. When assembling the support base 10 shown in FIG. 1, first, the support portion 12 and the two leg portions 14a and 14b are prepared separately, and the two leg portions 14a and 14b are connected by the connecting portion 32. As shown in FIG. When the two legs 14a and 14b are connected by the connecting portion 32, the two columns 30 and 30 preferably extend vertically and are parallel to each other. However, in reality, due to various conditions, the two pillars 30, 30 tend to tilt toward the center in the left-right direction as they go upward.

After the two legs 14a and 14b are connected, the post 30 of the leg 14a is arranged inside (on the right side) in the left-right direction of the drooping portion 22a that constitutes the support portion 12, as shown in FIG. As described above, the column 30 is tilted toward the center (right side) in the left-right direction as it goes upward, so the width of the gap 76 created between the support portion 12 and the leg portion 14a becomes wider as it goes upward. . Therefore, when the width of the gap 76 at the height of the upper first through-hole 24 is defined as upper gap width W1, and the width of the gap 76 at the height of the lower first through-hole 24 is defined as lower gap width W2, The upper gap width W1 is wider than the lower gap width W2.

When the positioning of the leg portion 14a with respect to the support portion 12 is completed, the leg portion 14a is fixed to the support portion 12 as shown in FIG. When fixing the leg portion 14a to the support portion 12, first, the main body portion 60 of the rotation prevention member 18 is arranged on the side surface 12a of the support portion 12, and the pin 62 of the rotation prevention member 18 is attached to the lower side. 1 through hole 24 and the second through hole 40 on the lower side. Since the diameter of the second portion 68b of the pin 62 is smaller than the diameter of the first portion 68a, the pin 62 (the pin main body 68) is inserted into the first through hole 24 on the lower side and the second through hole 40 on the lower side. The small-diameter second portion 68b serves as a guide when it is inserted through.

Subsequently, the male threaded portion 44 is inserted into the through hole 64 of the rotation blocking member 18 , the upper first through hole 24 and the upper second through hole 40 , and the male threaded portion 44 is screwed into the female threaded portion 46 . Then, the support portion 12 and the leg portion 14a are brought into close contact with each other by the tightening force of the male thread portion 44 and the female thread portion 46, and are connected. At this time, the body portion 60 of the rotation preventing member 18 is pressed against the support portion 12 by the head portion 50 of the male screw portion 44 and fixed.

(Other Usage of Rotation Prevention Member 18)
FIG. 7 is a cross-sectional view showing how the rotation preventing member 18 is used with respect to the conventional support base 80. As shown in FIG. A conventional support base 80 shown in FIG. 7 has a support portion 82 and a leg portion 84a, and the support portion 82 and the leg portion 84a are connected to each other by two connecting members 86,86. In this conventional support base 80 , rotation of the support portion 82 about the upper male screw portion 88 is prevented by the lower connection member 86 .

In the conventional support table 80 shown in FIG. 7, when adjusting the height of the support portion 82, it is necessary to remove the two connection members 86, 86. After adjusting the height of the support portion 82, Instead of the connection member 86 on one side (lower side in FIG. 7), the rotation preventing member 18 of the above embodiment may be used. In this case, the pin 62 of the rotation blocking member 18 is inserted through the lower first through-hole 90 and the lower second through-hole 92, as indicated by the two-dot chain line in FIG. The male threaded portion 88 of the connecting member 86 is inserted through the through hole 64 of the rotation preventing member 18 , the upper first through hole 90 , and the upper second through hole 92 , and screwed into the female threaded portion 94 .

As described above, even in the conventional support base 80, by using the rotation preventing member 18, the work load of the height adjustment work can be greatly reduced.

Further, in the conventional support base 80 shown in FIG. 7, if one of the two connecting members 86, 86 is loosened and falls off, the rotation preventing member 18 may be used instead of the fallen connecting member 86. good. In this case, the support base 80 can be easily repaired by the rotation blocking member 18 .

(effect)
According to this embodiment, the following effects can be obtained by the above configuration. That is, as shown in FIG. 3, it is not necessary to insert the male threaded portion 44 into the first through hole 24 on the lower side and the second through hole 40 on the lower side, and the male threaded portion 44 is screwed into the female threaded portion 46. Since labor can be saved, the support base 10 can be easily assembled in a short time.

As shown in FIG. 3, the main body portion 60 provided with the pin 62 in the rotation preventing member 18 is fixed to the support portion 12 by the connecting member 16, so the pin 62 is positioned between the first through hole 24 and the second through hole. It's hard to drop out of 40.

As described above, when inserting the pin 62 through the first through-hole 24 and the second through-hole 40, the small-diameter second portion 68b can be used as a guide to facilitate the insertion. Therefore, it is possible to narrow the width of the gap between the outer surface of the first portion 68a and the inner surfaces of the first through hole 24 and the second through hole 40, thereby suppressing rattling of the pin 62 due to this gap.

Since the outer diameter of the second portion 68b is formed to have a thickness that provides the same clearance fit (gap) as the first portion 68a with respect to the inner diameter of the female threaded portion 46, the first portion 68a and the second portion 68a are separated from each other. The portion 68b can be brought into contact with the inner peripheral surfaces of the first through hole 24, the second through hole 40, and the internal thread portion 46 at the same time, and the contact surface pressure can be dispersed to prevent damage to each contact portion.

As shown in FIG. 3, when a set of two first through holes 24 is a first set 26 and a set of two second through holes 40 is a second set 42, the first set 26 is the second set. 42 are vertically shifted so that they can correspond to different heights (FIG. 2). Therefore, by making the second set 42 correspond to one selected from the plurality of first sets 26, the height of the support portion 12 can be adjusted.

As shown in FIG. 6, the upper gap width W1 and the lower gap width W2 are compared, and the male threaded portion 44 is provided in the first through hole 24 and the second through hole 40 corresponding to the wider upper gap width W1. is inserted. The leg portion 14 a is connected to the support portion 12 by screwing the male thread portion 44 into the female thread portion 46 . Therefore, the support portion 12 and the leg portion 14a can be brought into close contact with each other, and the gap 76 between the support portion 12 and the leg portion 14a can be effectively eliminated.

As shown in FIG. 3 , the main body portion 60 of the rotation preventing member 18 has a through hole 64 through which the male screw portion 44 is inserted, and the male screw portion 44 has a head portion 50 that abuts on the main body portion 60 . , the head portion 50 of the male screw portion 44 can press and fix the body portion 60 against the support portion 12 .

As shown in FIG. 5, the rotation preventing member 18 can be easily manufactured by using a body portion 60 made of a metal plate and a pin 62 made of a metal bar. Further, since the contact surface 70a of the contact portion 70 is formed perpendicular to the pin body 68, the pin body 68 can be attached to the main body portion 60 simply by welding the contact surface 70a to the one surface 60e of the main body portion 60. 60 can be arranged perpendicular to the other side 60f.

(Modification)
It should be noted that the implementation of the present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the object of the present invention. For example, in the above-described embodiment, the support base 10 shown in FIG. 1 is configured as a desk for supporting objects (textbooks, notebooks, etc.), but the support base may be configured as a chair (not shown) for supporting a person. good.

As shown in FIG. 3, in the above embodiment, the two female threads 46, 46 are welded to the upper end 30a of the post 30 forming the leg 14a. may be provided independently from Also, the female threaded portion 46 on the side into which the pin 62 is inserted may be omitted.

As shown in FIG. 3, in the above-described embodiment, the through hole 64 is formed in the body portion 60 of the rotation blocking member 18, but instead of the through hole 64, a U-shaped or V-shaped concave portion ( omitted) may be formed on the outer peripheral edge of the body portion 60 . Even in this case, by arranging the concave portion around the male screw main body 48, the main body portion 60 can be pressed against the support portion 12 by the head portion 50 and fixed.

As shown in FIG. 5, in the above-described embodiment, the pin body 68 is rod-shaped and has a first portion 68a and a second portion 68b with different outer diameters. It may be configured in a rod shape having a diameter, or may be configured in a rod shape in which the outer diameter gradually decreases toward the tip.

Further, when the pin body 68 has a first portion 68a and a second portion 68b having different outer diameters, the outer diameter of the second portion 68b is fitted to the inner diameter of the female screw portion 46 with a clearance of the first portion 68a. By forming it to a thickness that allows a clearance fit with a larger gap, it is possible to avoid contact with the inner peripheral surface of the female threaded portion 46 and prevent damage to the female threaded portion 46 . In addition, the pin body 68 is formed so that the outer diameter of the second portion 68b has a thickness that allows a clearance fit that is smaller than the clearance fit of the first portion 68a with respect to the inner diameter of the female screw portion 46, so that the first through hole It is also possible to prevent damage to the first through hole 24 and the second through hole 40 by avoiding contact with the inner peripheral surfaces of the hole 24 and the second through hole 40 .

The rotation blocking member 18 shown in FIG. 3 may be arranged upside down. That is, the male screw portion 44 of the connecting member 16 is inserted through the first through hole 24 on the lower side and the second through hole 40 on the lower side, and the first through hole 24 on the upper side and the second through hole 40 on the upper side are inserted. , the pin 62 of the rotation preventing member 18 may be inserted through. In particular, when the lower gap width W2 is wider than the upper gap width W1, by turning the rotation preventing member 18 upside down, the gap 76 between the support portion 12 and the leg portion 14a can be effectively closed. can be resolved to

As shown in FIG. 3, in the above-described embodiment, the body portion 60 of the rotation blocking member 18 is fixed to the support portion 12 by the connection member 16, but this body portion 60 is fixed to the leg portion 14a by the connection member 16. may be In this case, since the rotation preventing member 18 is arranged on the leg portion 14a side, the female screw portion 46 is arranged on the support portion 12 side.

As shown in FIG. 3, in the above-described embodiment, a plurality of first sets 26, which are sets of two first through-holes 24 provided in the support portion 12, are displaced in the vertical direction. In addition, a plurality of second sets 42, which are sets of two second through holes 40 provided in the leg portion 14a, may be provided so as to be shifted in the vertical direction.

DESCRIPTION OF SYMBOLS 10... Support stand, 12... Support part, 14a, 14b... Leg part, 16... Connection member,
18... Rotation prevention member, 24... First through hole, 26... First set, 40... Second through hole,
42... Second set, 44... Male threaded portion, 46... Female threaded portion, 50... Head portion, 60... Body portion,
62... Pin, 64... Through hole, 66... Pin insertion hole, 70... Contact portion, 70a... Contact surface.

Claims (3)

a support portion that has two first through holes that are horizontally spaced apart from each other in the vertical direction and that supports an object to be supported;
a leg having two second through holes respectively corresponding to the two first through holes and receiving the load of the support;
A connection for connecting the leg portion to the support portion, having a rod-shaped male screw portion inserted into one of the first through-holes and one of the one of the second through-holes, and a female screw portion screwed into the male screw portion. a member;
a rotation prevention member that prevents rotation of the support portion about the male threaded portion;
The rotation preventing member is
a body portion fixed to one of the support portion and the leg portion by the connection member;
A support base comprising a desk or a chair , which is provided in the main body and has a pin inserted into the other first through hole and the other second through hole. 2. A support base comprising a desk or a chair according to claim 1, wherein said pin has an abutment portion abutted against one surface of said body portion. a support portion that has two first through holes that are horizontally spaced apart from each other in the vertical direction and that supports an object to be supported;
a leg having two second through holes respectively corresponding to the two first through holes and receiving the load of the support;
A connection for connecting the leg portion to the support portion, having a rod-shaped male screw portion inserted into one of the first through-holes and one of the one of the second through-holes, and a female screw portion screwed into the male screw portion. A rotation prevention member for a desk or chair for preventing rotation of the support portion about the male screw portion, wherein
a body portion fixed to one of the support portion and the leg portion by the connection member;
a through-hole formed in the main body and through which the male threaded portion is inserted removably;
a pin provided in the body portion and inserted into the other first through hole and the other second through hole;
The pin is a rotation-preventing member for a support base, such as a desk or a chair , having an abutting portion that abuts against one surface of the main body portion.

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