JP2018050967A - Support base, rotation prevention member and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support base that can be easily assembled in a short time, a rotation prevention member that prevents rotation of a support part constituting the support base, and a manufacturing method of the same.SOLUTION: A support base 10 comprises: a support part 12 having two first through holes 24; a leg part 14a having two second through holes 40; a connection member 16 having a male screw part 44 inserted into one (upper) first through hole 24 and one (upper) second through hole 40; and a rotation prevention member 18 for preventing rotation of the support part 12 around the male screw part 44. The rotation prevention member 18 has a body part 60 fixed by the connection member 16, and a pin 62 inserted into the other (lower) first through hole 24 and the other (lower) second through hole 40. The pin 62 has a contact part 70, and a contact surface 70a of the contact part 70 is brought into contact with the body part 60 and welded thereto.SELECTED DRAWING: Figure 3

Description

  The present invention provides a support base including a support portion that supports a support target, a leg portion that receives a load of the support portion, and a connection member that connects the leg portion to the support portion, and a rotation prevention that prevents the support portion from rotating. The present invention relates to a member and a manufacturing method thereof.

  Conventionally, there is a support base in which a leg portion is connected to a support portion by a connecting member. For example, the following Patent Document 1 discloses a desk as the support base. This desk includes a main body as a “support portion” having a top plate and a side plate, a leg body as a “leg portion” that receives the load of the main body, and a bolt as a “connecting member” that connects the leg body 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 to them. In this desk, when adjusting the height of the main body, the bolts and nuts are removed from the lifting holes provided in the legs, and after adjusting the height of the main body, the bolts are inserted into other lifting holes. Screwed onto the nut.

Japanese Patent Laying-Open No. 2015-6251

  In the desk described in the above-mentioned patent document 1, in order to fix the two legs to the main body, a nut must be screwed into each of the four bolts, and it takes time to assemble the desk. was there. For desks used in schools, etc., it is necessary to adjust the height of the main body according to the height and preference of the child whenever the grade changes, but there are only a large number of desks (for example, 40 units per class). In addition, since the work is concentrated in a short period (for example, March), there is a problem that the work load becomes too large.

  The present invention has been made to cope with the above-described problem, and provides a support base that can be easily assembled in a short time, a rotation prevention member that prevents the rotation of the support portion constituting the support base, and a method for manufacturing the same. The purpose is to provide.

  In order to achieve the above object, the feature of the support base of the present invention includes two first through holes provided in the horizontal direction at intervals in the vertical direction, and a support portion that supports a support target; Two second through-holes corresponding to each of the two first through-holes, and inserted into the leg portion receiving the load of the support portion, one of the first through-holes and one of the second through-holes A rod-shaped male screw portion and a female screw portion screwed to the male screw portion, a connecting member connecting the leg portion to the support portion, and rotation of the support portion around the male screw portion. A rotation blocking member for blocking, and the rotation blocking member is provided on the main body portion fixed to the one of the support portion and the leg portion by the connecting member, and the other of the body portion Having a first through hole and a pin inserted into the other second through hole That.

  In this configuration, the male threaded portion of the connecting member is inserted into the first through hole and the second through hole, and the female threaded portion is screwed into the male threaded portion, so that the leg portion is supported by the supporting 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, whereby the support portion rotates around the male screw portion with respect to the leg portion. Is blocked. Since the main body portion provided with the pin of the rotation preventing member is fixed to one of the support portion and the leg portion with the connecting member, the pin is difficult to drop off from the other first through hole and the other second through hole. . The first through hole and the second through hole only need to be formed at least two each, and are 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, the trouble of screwing the male screw portion into the female screw portion can be saved, and the support base can be easily assembled in a short time.

  Another feature of the present invention is that when the set of two first through holes is a first set and the set of two second through holes is a second set, the first set and the second set One is that a plurality is provided so as to be shifted in the vertical direction so as to correspond to the other at different heights.

  In this configuration, the height of the support portion can be adjusted. For example, in the case where a plurality of first sets are provided in the support portion, the height of the support portion is increased by making the second set provided in the leg portion correspond to one selected from the plurality of first sets. Can be adjusted. On the other hand, when a plurality of second sets are provided on the leg portion, the height of the support portion is increased by making the first set provided on the support portion correspond to one selected from the plurality of second sets. Can be adjusted. Also, with this configuration, the number of connecting members can be halved compared to the prior art disclosed in Patent Document 1, so that the work load of height adjustment work can be greatly reduced.

  Another feature of the present invention is that the main body portion has a through hole through which the male screw portion is inserted, and the male screw portion has a head portion that comes into contact with the main body portion. is there.

  In this configuration, the main body portion can be pressed and fixed to one of the support portion and the leg portion with the head portion of the male screw portion.

  Another feature of the present invention is that the gap width between the support portion and the leg portion at the height of the upper first through hole is the upper gap width, and the support is at the height of the lower first through hole. When the gap width between the portion and the leg portion is the lower gap width, when the upper gap width is wider than the lower gap width, the upper first through hole and the upper second through hole When the male screw portion is inserted and the lower gap width is wider than the upper gap width, the male screw portion is inserted into the lower first through hole and the lower second through hole.

  In this configuration, when the upper gap width is compared with the lower gap width, 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 lower gap width is wide, the male screw portion is disposed on the lower side and the pin is disposed on the upper side. That is, on the side where the gap width is wide, the legs are brought into close contact with and connected to the support portion by the connection member. Therefore, the gap between the support portion and the leg portion can be effectively eliminated.

  In order to achieve the above-described object, the present invention is characterized in that there are two first through holes provided in the horizontal direction with a space in the vertical direction, and a support portion for supporting a support target, Two second through-holes corresponding to each of the first through-holes, a leg portion receiving the load of the support portion, and a rod shape inserted into one of the first through-holes and one of the second through-holes And a connecting member for connecting the leg portion to the support portion. The support portion includes a male screw portion and a female screw portion screwed into the male screw portion. A rotation preventing member for preventing movement, a main body portion fixed to the one of the support portion and the leg portion by the connecting member, and provided in the main body portion, the other first penetration Having a hole and a pin inserted into the other second through hole That.

  In the support base, the male threaded portion of the connecting member is inserted into the first through hole and the second through hole, and the female threaded portion is screwed into the male threaded portion, so that the leg portion is formed in the supporting 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. Thereby, rotation of the support part centering on the external thread part can be prevented. Since the main 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 difficult to drop off from the other first through hole and the other second through hole.

  Even when the male screw part is inserted into the other first through hole and the other second through hole at the time of shipment of the support base from the factory, the male screw part may be loosened and fall off due to long-term use. In this case, the support base can be easily repaired in a short time by using the rotation blocking member instead of the dropped male screw portion.

  According to another feature of the present invention, the pin includes a first part disposed inside each of the other first through hole and the other second through hole, and a tip portion of the first part. And a second portion that extends and the diameter of the second portion is smaller than the diameter of the first portion.

  In this configuration, since the diameter of the second portion is smaller than the diameter of the first portion, the second portion having a small diameter is used as a guide when the pin is inserted into the first through hole and the second through hole. Can be easily inserted. Therefore, it is possible to reduce the width of the gap between the outer surface of the first portion and the inner surfaces of the first through hole and the second through hole, and the rattling of the pin due to the gap can be suppressed.

  Another feature of the present invention is that the main body portion has a through hole through which the male screw portion is inserted, and the male screw portion has a head portion that comes into contact with the main body portion. is there.

  In this configuration, the main body portion can be pressed and fixed to one of the support portion and the leg portion with the head portion of the male screw portion.

  Another feature of the present invention is a method of manufacturing the rotation preventing member, wherein (a) the body portion having a pin insertion hole is formed by processing a metal plate having a constant thickness; ) Forming a pin having a pin main body inserted into the pin insertion hole and an abutting portion abutting against one surface of the main body by processing a metal bar; and (c) the main body The pin main body is inserted into the pin insertion hole from one surface side of the portion, and the contact portion is welded to one surface of the main body portion.

  In this configuration, the rotation preventing member can be easily manufactured by using a metal plate and a metal bar.

  Another feature of the present invention is that, in the step (b), a contact surface of a contact portion that is in contact with one surface of the body portion is formed perpendicular to the pin body.

  In this configuration, the pin body can be disposed perpendicular to the other surface of the main body simply by welding the contact surface of the contact portion to one surface of the main body.

It is a perspective view which shows the structure of the support stand which concerns on one Embodiment of this invention. It is an expansion perspective view which shows the structure of the principal part of the support stand shown in FIG. It is an expanded sectional view which shows the structure of the principal part of the support stand shown in FIG. 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. It is a disassembled perspective view which shows the structure of the rotation prevention member which concerns on one Embodiment of this invention. It is sectional drawing which shows the method of fixing a leg part to a support part. It is sectional drawing which shows the usage method of the rotation prevention member with respect to the conventional support stand.

  Hereinafter, embodiments of a support base, a rotation blocking member, and a manufacturing method thereof according to the present invention will be described with reference to the drawings. It should be noted that “front / rear / left / right / up / down” directions used in the following description correspond to the directions indicated by arrows in FIG.

(Configuration of support base 10)
FIG. 1 is a perspective view showing a configuration of a support base 10 according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view showing a configuration of a main part of the support base 10. FIG. 3 is an enlarged cross-sectional view illustrating a configuration of a main part of the support base 10. Since the support base 10 of this embodiment is comprised symmetrically, it demonstrates below paying attention mainly to the left part of the support base 10 below.

  As shown in FIG. 1, the support base 10 is a desk for children used in a classroom in a school, and corresponds to the support portion 12, the pair of left and right legs 14a and 14b, and the legs 14a and 14b. And a rotation preventing 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 target (not shown) such as a textbook or a notebook, and is provided extending downward from both the top plate 20 and the left and right ends of the top plate 20. And two drooping portions 22a and 22b. As shown in FIG. 2, a plurality (11 in the present embodiment) of first through holes 24, 24... Are directed in the horizontal direction (left-right direction) at regular intervals in the vertical direction. Is provided.

  As shown in FIG. 3, when connecting the leg part 14a to the support part 12 using the connection member 16, according to the height of the top plate 20 (FIG. 1) which a child desires, several 1st penetration is carried out. Two first through holes 24, 24 are selected from the holes 24, 24. In the present embodiment, when one first through hole 24 is selected, the second one counted downward from the first through hole 24 is automatically selected as the other first through hole 24. Therefore, as shown in FIG. 2, if the set of two selectable first through holes 24, 24 is a first set 26, a total of nine first sets 26 are included in the support portion 12 (hanging portion 22 a). Are shifted in the vertical direction.

  As shown in FIG. 1, each leg part 14a and 14b is a part which receives the load of the support part 12, and has the rod-shaped support | pillars 30 and 30 extended in an up-down direction. Each of the support columns 30 is formed in a pipe shape having a quadrangular cross section, and is connected to each other via a bar-shaped connecting portion 32 extending in the left-right direction.

  As shown in FIG. 3, at the upper end portion 30 a of the support column 30, the right wall portion 36 is crushed to the left side and overlapped with the left wall portion 38. In the upper end portion 30a, two second through holes 40, 40 are provided in the horizontal direction (left-right direction) with an interval in the vertical 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 constituting the first set 26 provided in the support portion 12. Therefore, if the set of the two second through holes 40, 40 is the second set 42, the second set 42 is one first set selected from a plurality (9 in the present embodiment) of the 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 are configured. One (upper side) second through hole 40 communicates with the other (lower side) first through hole 24 and second side (lower side) constituting the first set 26. The second through hole 40 is in communication.

  As shown in FIG. 3, the connecting member 16 is screwed into the male screw portion 44 and a rod-like male screw portion 44 inserted into one (upper) first through hole 24 and one (upper) second through hole 40. And an internal thread portion 46 to be provided. The male screw portion 44 includes a male screw main body 48 having a male screw 48a formed on the outer peripheral surface thereof, and a head 50 provided at a base end portion of the male screw main body 48. (Not shown) is provided with a hexagonal hole 52.

  The internal thread portion 46 includes an internal thread body 54 having an internal thread 54 a formed on the inner peripheral surface, and a bag portion 56 that covers one opening of the internal thread body 54. That is, the female thread portion 46 of the present embodiment is a so-called “cap nut”. In the present embodiment, the two female screw 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 support column 30. Thereby, the space inside each internal thread part 46 is connected to the corresponding second through hole 40.

(Configuration of the 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 FIG. 4A is a left side view, FIG. 4B is a front view, and FIG. 4C is a right side view. FIG. 5 is an exploded perspective view showing the configuration of the rotation preventing member 18. The rotation prevention member 18 shown in FIG. 3 prevents the rotation of the support portion 12 around the male screw portion 44, and the main body portion 60 fixed to the support portion 12 by the connection member 16 and the first penetration. And a pin 62 inserted into the hole 24 and the second through hole 40. The main body 60 and the pin 62 are made of metal such as iron and stainless steel so that they can be welded to each other.

  As shown in FIGS. 4A, 4 </ b> B, and 4 </ b> C, the main body 60 is a plate-like member that has a constant thickness and is formed long in the vertical direction. Both front and rear side edges 60a and 60b of the main body 60 are formed in a straight line extending in the up and down direction, and both upper and lower side edges 60c and 60d of the main body 60 are formed in an arc shape that bulges outward. . The left and right side surfaces 60e and 60f of the main body 60 are formed as smooth flat surfaces.

  As shown in FIG. 5, a circular through hole 64 into which the male screw portion 44 of the connection member 16 (FIG. 3) is inserted is formed at the center in the front-rear direction in the upper portion of the main body portion 60. A circular pin insertion hole 66 through which the pin 62 is inserted is formed at the center in the front-rear direction at the lower portion of the main body 60. Further, as shown in FIG. 4A, around the through hole 64 on one surface (left side surface) 60e of the main body portion 60, a letter “up” indicating an appropriate direction of the main body portion 60 and a male screw portion 44 are provided. An arrow indicating the direction in which the screw is turned, and letters “Shimal” and “Yulm” indicating the effect of turning the male screw portion 44 are described.

  As shown in FIG. 5, the pin 62 includes a cylindrical pin main body 68 that is inserted into the pin insertion hole 66, and a disk-shaped contact portion 70 that is provided with a diameter increased from the base end portion of the pin main body 68. have. The pin main body 68 includes a columnar first portion 68a disposed inside each of the lower first through hole 24 and the lower second through hole 40 (FIG. 3), and a tip portion of the first portion 68a. And a second portion 68b provided to extend forward. The outer diameter of the first portion 68 a is formed to a thickness that provides a slightly narrower gap fit 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, but the gap fitting of the first portion 68a with respect to the inner diameter of the female screw portion 46 (the first through hole 24 and Each gap is formed to have the same thickness as the gap fitting (gap).

  The contact portion 70 is formed with an abutment surface 70a that abuts against one surface (left side surface) 60e of the main body 60, and the abutment surface 70a has a plurality of (this embodiment) melted during welding. In the embodiment, three projections 74 are formed at a constant angular interval (120 degrees in the present 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 is in contact with and welded to one surface (left side) 60e of the main body 60, the angle formed between the other surface (right side) 60f of the main body 60 and the pin main body 68 is inevitable. It becomes 90 degrees.

(Manufacturing method of the rotation prevention member 18)
As shown in FIG. 5, when manufacturing the rotation preventing member 18, first, a main body having a through hole 64 and a pin insertion hole 66 by processing a metal plate (not shown) having a certain thickness. A portion 60 is formed. Moreover, the pin 62 which has the pin main body 68 and the contact part 70 is formed by processing metal bar material (illustration omitted). 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. Then, the contact surface 70a of the contact part 70 and the one surface 60e of the main-body part 60 are joined by projection welding. In projection welding, the plurality of protrusions 74 provided on the contact surface 70a are melted, so that the contact surface 70a of the contact portion 70 can be joined to the one surface 60e of the main body 60 without any gap.

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

  When the connection between the two leg portions 14a and 14b is completed, the support column 30 of the leg portion 14a is disposed on the inner side (right side) of the hanging portion 22a constituting the support portion 12 in the left-right direction, as shown in FIG. As described above, since the support column 30 is inclined toward the center in the left-right direction (right side) as it goes upward, the width of the gap 76 generated between the support part 12 and the leg part 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 the upper gap width W1, and the width of the gap 76 at the height of the lower first through hole 24 is the 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 14 a to the support portion 12, first, the main body portion 60 of the rotation prevention member 18 is disposed on the side surface 12 a of the support portion 12, and the pin 62 of the rotation prevention member 18 is placed on the lower side. The first through hole 24 and the lower second through hole 40 are inserted. 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 (pin main body 68) is connected to the lower first through hole 24 and the lower second through hole 40. When inserted through the second portion 68b, the second portion 68b having a small diameter serves as a guide.

  Subsequently, the male screw 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 screw portion 44 is screwed into the female screw portion 46. Then, the support part 12 and the leg part 14a are brought into close contact with each other by the tightening force between the male screw part 44 and the female screw part 46. At this time, the main 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 methods of the rotation prevention member 18)
FIG. 7 is a cross-sectional view showing a method of using the rotation preventing member 18 with respect to the conventional support base 80. The conventional support base 80 shown in FIG. 7 has a support portion 82 and a leg portion 84 a, and the support portion 82 and the leg portion 84 a are connected to each other by two connecting members 86 and 86. In this conventional support base 80, the rotation of the support portion 82 around the upper male screw portion 88 is prevented by the lower connection member 86.

  In the conventional support base 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, but after adjusting the height of the support portion 82, Instead of the connection member 86 on the one side (lower side in FIG. 7), the rotation preventing member 18 of the above embodiment may be used. In this case, as indicated by a two-dot chain line in FIG. 7, the pin 62 of the rotation preventing member 18 is inserted into the lower first through hole 90 and the lower second through hole 92. The male screw portion 88 of the connection member 86 is inserted into the through hole 64 of the rotation blocking member 18, the upper first through hole 90, and the upper second through hole 92, and is screwed into the female screw portion 94.

  Thus, also in the conventional support stand 80, by using the rotation prevention member 18, the work burden of the height adjustment work can be greatly reduced.

  Further, in the conventional support base 80 shown in FIG. 7, when one of the two connection members 86, 86 is loosened and dropped out, the rotation preventing member 18 may be used instead of the dropped connection member 86. Good. In this case, the support base 80 can be easily repaired by the rotation blocking member 18.

(effect)
According to the present embodiment, the following effects can be achieved by the above configuration. That is, as shown in FIG. 3, it is not necessary to insert the male screw portion 44 into the lower first through hole 24 and the lower second through hole 40, and the male screw portion 44 is screwed into the female screw 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 that the pin 62 includes the first through hole 24 and the second through hole. It is difficult to drop off 40.

  As described above, when the pin 62 is inserted into the first through hole 24 and the second through hole 40, the second portion 68b having a small diameter can be easily inserted. Therefore, it is possible to reduce 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, and the rattling of the pin 62 due to this gap can be suppressed.

  Since the outer diameter of the second portion 68b is formed to have the same gap fit (gap) as the gap fit of the first portion 68a with respect to the inner diameter of the female screw portion 46, the first portion 68a and the second portion 68b. 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 female screw portion 46 at the same time, and the contact surface pressure can be dispersed to prevent the contact portions from being damaged.

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

  As shown in FIG. 6, when comparing the upper gap width W <b> 1 and the lower gap width W <b> 2, the first through hole 24 and the second through hole 40 corresponding to the wider upper gap width W <b> 1 include the male screw portion 44. Is inserted. Then, the male screw portion 44 is screwed into the female screw portion 46, whereby the leg portion 14 a is connected to the support portion 12. Therefore, the support part 12 and the leg part 14a can be made to contact | adhere reliably, and the clearance gap 76 between the support part 12 and the leg part 14a can be eliminated effectively.

  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 is a head 50 that contacts the main body portion 60. Therefore, the main body 60 can be pressed against the support 12 with the head 50 of the male screw portion 44 and fixed.

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

(Modification)
In carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. For example, in the above embodiment, the support base 10 shown in FIG. 1 is configured as a desk that supports an object (textbook, notebook, etc.), but the support base may be configured as a chair (not shown) that supports a person. Good.

  As shown in FIG. 3, in the above embodiment, the two female screw portions 46, 46 are welded to the upper end portion 30a of the support column 30 constituting the leg portion 14a, but the female screw portions 46, 46 are connected to the leg portion 14a. May be provided independently. Further, the female screw portion 46 on the side where the pin 62 is inserted may be omitted.

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

  As shown in FIG. 5, in the above embodiment, the pin main body 68 is formed in a rod shape having a first portion 68a and a second portion 68b having 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 main body 68 has the first portion 68a and the second portion 68b having different outer diameters, the outer diameter of the second portion 68b is fitted into the gap of the first portion 68a with respect to the inner diameter of the female screw portion 46. By forming the gap so as to fit into a larger gap, contact with the inner peripheral surface of the female screw portion 46 can be avoided and damage to the female screw portion 46 can be prevented. In addition, the pin body 68 is formed so that the outer diameter of the second portion 68b is smaller than that of the first portion 68a with respect to the inner diameter of the female screw portion 46, so that the gap fit is smaller than the first fit. It is also possible to prevent the first through hole 24 and the second through hole 40 from being damaged by avoiding contact with the inner peripheral surfaces of the hole 24 and the second through hole 40.

  The rotation preventing 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 into the lower first through hole 24 and the lower second through hole 40, and the upper first through hole 24 and the upper second through hole 40 are The pin 62 of the rotation preventing member 18 may be inserted through the pin. In particular, when the lower gap width W2 is wider than the upper gap width W1, the gap 76 between the support portion 12 and the leg portion 14a is effectively reduced by turning the rotation prevention member 18 upside down. Can be resolved.

  As shown in FIG. 3, in the above embodiment, the main body portion 60 of the rotation preventing member 18 is fixed to the support portion 12 by the connecting member 16, but the main body portion 60 is fixed to the leg portion 14 a by the connecting member 16. May be. In this case, since the rotation preventing member 18 is disposed on the leg portion 14a side, the female screw portion 46 is disposed on the support portion 12 side.

  As shown in FIG. 3, in the above embodiment, a plurality of first sets 26, which are sets of two first through holes 24 provided in the support portion 12, are provided while being shifted 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 while being 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 ... 1st through-hole, 26 ... 1st group, 40 ... 2nd through-hole,
42 ... 2nd group, 44 ... Male screw part, 46 ... Female screw part, 50 ... Head, 60 ... Main part,
62 ... Pin, 64 ... Through hole, 66 ... Pin insertion hole, 70 ... Contact part, 70a ... Contact surface.

Claims (9)

A support part that has two first through-holes provided in the vertical direction and spaced in the horizontal direction, and supports a support object;
Two second through-holes corresponding to each of the two first through-holes and receiving a load of the support part; and
A connection having a rod-like male screw part inserted into one of the first through holes and one of the second through holes and a female screw part screwed into the male screw part, and connecting the leg part to the support part Members,
A rotation preventing member that prevents rotation of the support portion around the male screw portion;
The rotation preventing member is
A main body fixed by the connection member to one of the support and the leg;
A support base having a pin provided in the main body portion and inserted into the other first through hole and the other second through hole. When a set of two first through holes is a first set and a set of two second through holes is a second set,
2. The support base according to claim 1, wherein one of the first set and the second set is provided in a plurality shifted in the vertical direction so as to correspond to the other at different heights. The main body portion has a through hole through which the male screw portion is inserted,
The said external thread part is a support stand of Claim 1 or 2 which has the head contact | abutted to the said main-body part. The gap width between the support portion and the leg portion at the height of the upper first through hole is defined as the upper gap width, and the gap between the support portion and the leg portion at the lower first through hole height. When the width is the lower gap width,
When the upper gap width is wider than the lower gap width, the male screw portion is inserted into the upper first through hole and the upper second through hole,
4. The male screw portion is inserted into the lower first through hole and the lower second through hole when the lower gap width is wider than the upper gap width. 5. The support stand described. A support part that has two first through-holes provided in the vertical direction and spaced in the horizontal direction, and supports a support object;
Two second through-holes corresponding to each of the two first through-holes and receiving a load of the support part; and
A connection having a rod-like male screw portion inserted into one of the first through holes and one of the second through holes and a female screw portion screwed into the male screw portion, and connecting the leg portion to the support portion A support block comprising a member, a rotation preventing member for preventing rotation of the support portion around the male screw portion,
A main body fixed by the connection member to one of the support and the leg;
A rotation preventing member having a pin provided in the main body portion and inserted into the other first through hole and the other second through hole. The pin includes a first portion disposed inside each of the other first through-hole and the other second through-hole, and a second portion provided extending forward from a tip portion of the first portion. And
The rotation preventing member according to claim 5, wherein a diameter of the second portion is smaller than a diameter of the first portion. The main body portion has a through hole through which the male screw portion is inserted,
The rotation prevention member according to claim 5 or 6, wherein the male screw portion has a head portion that comes into contact with the main body portion. It is a manufacturing method of the rotation prevention member given in any 1 paragraph of Claims 5 thru / or 7,
(A) Forming the main body having a pin insertion hole by processing a metal plate having a constant thickness;
(B) forming the pin having a pin main body inserted into the pin insertion hole by processing a metal bar and an abutting portion in contact with one surface of the main body;
(C) A method for manufacturing a rotation preventing member, wherein the pin main body is inserted into the pin insertion hole from one surface side of the main body portion, and the contact portion is welded to one surface of the main body portion.   The method of manufacturing a rotation preventing member according to claim 8, wherein in the step (b), a contact surface of a contact portion that is in contact with one surface of the body portion is formed perpendicular to the pin body. .

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