JP2006022545A - Auxiliary leg mounted to cylindrical leg of working bench, stepladder, or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary leg mounted to a cylindrical leg of a working bench, a stepladder, or the like practical with excellent stability, clamp-fixed well to the cylindrical leg without looseness even if the diameter of the cylindrical leg 9 supported to a bearing part 5 and clamp-fixed by a clamp-fixing mechanism (a) varies from large to small. <P>SOLUTION: In the auxiliary leg mounted to the cylindrical leg of the working bench, the stepladder, or the like, a pressure contact bearing surface 4 of the bearing part 5 with which the cylindrical leg 9 is brought into pressure contact by the clamp-fixing mechanism (a), is formed with an inclined bearing surface 7 on the opposed side to a direction to clamp-press the cylindrical leg 9 by a clamping bolt 6 of the clamp-fixing mechanism (a). Even when the diameter of the cylindrical leg 9 differs, the cylindrical leg 9 is thereby clamped by the clamp-fixing mechanism (a) and supported in pressure contact by the inclined bearing surface 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an auxiliary leg attached to a cylindrical leg such as a work table or a stepladder.

  An auxiliary leg disclosed in, for example, registered utility model No. 1404402 (Patent Document 1) according to the prior application of the applicant for adjusting the height of a cylindrical leg such as a work table or a stepladder is popular.

  In such a conventional auxiliary leg, for example, a mounting part is provided on the auxiliary leg so as to be movable up and down, and a mounting part for supporting a cylindrical leg such as a work table or a stepladder is provided in the mounting part, and the cylindrical leg is provided on the supporting part. Is an auxiliary leg attached to a cylindrical leg such as a work table or a stepladder provided with a tightening and fixing mechanism for tightening and fixing with a tightening bolt, and a support portion (hereinafter referred to as a receiving cylinder) formed in a cylindrical shape. When the cylindrical leg is brought into pressure contact with the inner peripheral surface of the receiving cylinder by tightening a fastening bolt screwed onto the upper part of the receiving cylinder, a pressure contact bearing surface for supporting the pressed cylindrical leg is obtained. The cylindrical leg is fastened and fixed by the inner peripheral surface of the cylindrical leg and the fastening bolt.

Registered Utility Model No. 1404402

  By the way, the auxiliary leg attached to the cylindrical leg such as the conventional work table or the stepladder has the cylindrical shape, so that the cylindrical leg is attached to the inner peripheral surface as the pressure contact bearing surface of the receiving cylinder. Even if it is pressed and fixed by clamping, the cylindrical leg is only in linear contact with the pressure bearing surface.

  When seen in a plan view, the cylindrical leg is only pressed and fixed by two points, that is, a pressure contact with the clamping bolt and a pressure contact with the pressure contact bearing surface. Therefore, there is a problem in stability such as rattling. there were.

  In addition, the smaller the diameter of the cylindrical leg that is inserted into the receiving tube and tightened and fixed, the more clearance is present in the receiving tube, and naturally the backlash is increased, so that the stability is further impaired.

  Therefore, conventional auxiliary legs attached to cylindrical legs such as work benches and stepladders should be well clamped and fixed when attached to cylindrical legs having a diameter approximately the same as the diameter of the receiving cylinder. However, even if it was attached to a cylindrical leg having a small diameter, the workability was poor due to poor stability, and the practicality was poor.

  In addition, in order to reduce backlash and improve the stability, it is necessary to set the formation length of the receiving tube sufficiently long, so that the weight is increased and workability such as carrying is impaired.

  The present invention has been completed in the light of the present situation as described above, and has been completed as a result of extensive research by the inventors, and an inclined bearing surface is formed on the pressure bearing surface of the bearing portion that supports the cylindrical leg that has been pressed. By configuring the cylindrical leg to be pressed and supported by the inclined support surface in a clamping state, when the cylindrical leg is clamped and fixed, it is clamped and fixed by at least three pressure contacts when viewed in plan. Therefore, the cylindrical leg can be reliably positioned and clamped and fixed satisfactorily, the stability at the time of tightening can be dramatically improved, and rattling can be surely prevented. As long as it has a diameter that can be pressed and supported on the surface, it can be positioned and tightened securely even if it is large or small, so it can be used well by attaching it to cylindrical legs of various diameters. Providing auxiliary legs that can be attached to cylindrical legs such as innovative worktables and stepladders that are excellent in practicality, such as the need to form the support part long to reduce tackiness, which can be reduced in weight. And

  The gist of the present invention will be described with reference to the accompanying drawings.

  A mounting portion 3 is provided on the auxiliary leg 1 so as to be movable up and down, and a locking mechanism 2 capable of fixing the mounting portion 3 at a predetermined height of the auxiliary leg 1 is provided on the mounting portion 3. A support part 5 for supporting a cylindrical leg 9 such as a stand or a stepladder is provided, and a fastening mechanism a for fastening the cylindrical leg 9 supported by the support part 5 with a tightening bolt 6 is provided in the support part 5. An auxiliary leg that is attached to a cylindrical leg such as a work table or a stepladder, and is a press-contacting support surface 4 of a support portion 5 to which the cylindrical leg 9 is press-contacted by the tightening and fixing mechanism a. Even if the inclined bearing surface 7 is formed on the side opposite to the direction in which the cylindrical leg 9 is clamped and pressed by the clamping bolt 6, the cylindrical leg 9 can be used even when the diameter of the cylindrical leg 9 is different. And is supported by pressure contact with the inclined bearing surface 7. Those of the auxiliary legs attached to the cylindrical leg like platform or ladder to.

  In addition, the inclined bearing surface 7 is formed in a state of being opposed to each other at a position where the cylindrical leg 9 is pressed and held, and the opposed interval between the pair of opposed inclined bearing surfaces 7 is opposite to the tightening direction in which the cylindrical leg 9 is fastened and fixed. The auxiliary leg attached to a cylindrical leg such as a workbench or a stepladder according to claim 1, characterized in that it is formed in a C shape that is widened.

  Further, the opposed inclined bearing surface 7 is parallel to the axial direction of the cylindrical leg 9 to be pressed and supported, and is symmetrical in plan view with respect to the screwing direction of the fastening bolt 6 of the fastening mechanism a. The auxiliary leg attached to a cylindrical leg such as a work table or a stepladder according to claim 2, wherein the auxiliary leg is attached to a cylindrical leg such as a work table or a stepladder.

  4. The structure according to claim 1, wherein the support portion 5 has a cylindrical shape, and has a structure in which a screw-engagement portion 8 into which a fastening bolt 6 is screwed is formed on a peripheral surface. This relates to auxiliary legs attached to cylindrical legs such as work tables and stepladders.

  Further, the support portion 5 has a structure in which the vicinity of the screwing portion 8 is formed thick, and relates to an auxiliary leg attached to a cylindrical leg such as a work table or a stepladder. .

  The support portion 5 is joined to the mounting portion 3 by joining the outer surface on the side facing the direction in which the cylindrical leg 9 is tightened and pressed by the tightening bolt 6 of the tightening fixing mechanism a to the mounting portion 3. 6. The structure according to claim 1, wherein the outer forming surface on the side to be joined to the mounting portion 3 of the support portion 5 is formed so as to be wider in plan view than the inner forming surface. The auxiliary leg is attached to a cylindrical leg such as a workbench or a stepladder described in any one of the above.

  Since the present invention is configured as described above, when a cylindrical leg such as a work table or a stepladder supported by the support portion is fastened and fixed by a tightening and fixing mechanism, the cylindrical leg is pressed and supported by the inclined support surface. Since it is tightened and fixed, the cylindrical leg can be reliably positioned and fixed between the pressure-contact bearing surface of the bearing portion that is clamped by the tightening mechanism and the cylindrical leg is in pressure contact with the inclined bearing surface or the inclined bearing surface facing each other. Excellent stability because it can be prevented, and sufficient stability can be maintained even if the formation length of the bearing is set short, so that it can be reduced in weight and excellent in workability such as carrying etc. It is an auxiliary leg that is attached to a cylindrical leg such as a workbench or a stepladder with excellent commercial value and excellent practicality.

  Further, in the inventions according to claims 2 and 3, the opposed inclined support portion can be supported even better when the cylindrical leg can be pressed and supported by the opposed inclined support portion, and the diameter of the cylindrical leg to be fastened and fixed is small. Therefore, even if the diameter of the cylindrical leg is various, it is excellent in stability without being rattled, and more practical.

  Further, in the invention according to the fourth aspect, since the manufacture becomes easy, the productivity is further improved, such as excellent productivity.

  Further, in the invention according to claim 5, since the strength of the threaded portion of the screwing portion is increased by increasing the thickness, the strength of the member is not so much required, and the support portion is a lightweight member such as an aluminum member. It can be reduced in weight by forming it with, and workability is further improved.

  Further, in the invention of claim 6, when the tightening bolt is operated, the mounting portion and the auxiliary leg are not obstructed and the workability is excellent, and the mounting is performed according to the shape of the outer surface of the pressure contact bearing surface. Excellent in practicality, such as increased joint strength between the bearing and the bearing.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  A support portion 5 that supports a cylindrical leg 9 such as a work table or a stepladder is attached to an attachment portion 3 that is provided on the auxiliary leg 1 so as to be movable up and down and can be fixed to a predetermined height of the auxiliary leg 1 by a locking mechanism 2. When the cylindrical leg 9 is supported on the support part 5 and the cylindrical leg 9 is fastened to the press-contacting support surface 4 of the support part 5 by the tightening bolt 6 of the tightening and fixing mechanism a, the cylindrical leg 9 is pressed. The bearing surface 4 is pressed and supported by the inclined bearing surface 7 formed on the side opposite to the direction in which the cylindrical leg 9 is clamped and pressed by the clamping bolt 6 of the clamping and fixing mechanism a. The fixed cylindrical leg 9 is composed of a tightening bolt 6 of the tightening and fixing mechanism a, three pressure contact bearing surfaces 4 of the bearing portion 5 and three inclined bearing surfaces 7 or an inclined bearing surface for the clamping bolt 6. Since it is supported by pressure contact at three locations, the stability is high. It does not occur, such as rattling.

  In addition, even when the diameter of the cylindrical leg 9 is different, the cylindrical leg 9 is clamped by the clamping and fixing mechanism a and is pressed and supported by the inclined bearing surface 7. Thus, the cylindrical leg 9 can be fastened and fixed to the support portion 5 satisfactorily.

  Furthermore, since high stability can be obtained by the inclined bearing surface 7, it is not necessary to set the formation length of the support portion 5 long in order to improve the stability, and the support portion 5 can be set to a short shape accordingly. Thus, the weight can be reduced.

  In addition, for example, the inclined support surface 7 is formed in a state of being opposed to each other at a position where the cylindrical leg 9 is pressed and held, and the facing distance between the pair of opposed inclined support surfaces 7 is a tightening direction for tightening and fixing the cylindrical leg 9. In the case of a configuration formed in a C shape widened in the opposite direction, the cylindrical leg 9 fastened to the support portion 5 is pressure-supported in a pressure-contact-supported state on the opposed inclined support surface 7, so that The opposed inclined bearing surface 7 is surely positioned and fastened and fixed.

  Further, for example, the opposed inclined bearing surface 7 is parallel to the axial direction of the cylindrical leg 9 to be pressed and supported, and is flat with respect to the screwing direction of the fastening bolt 6 of the fastening mechanism a. In the case of a configuration formed in a symmetrical shape, the screwing direction of the tightening bolt 6 is ensured even if the diameter of the cylindrical leg 9 pressed against and supported by the opposed inclined support surface 7 is large or small. The tightening bolt 6 abuts toward the axial center of the cylindrical leg 9 in a plan view, so that the tightening force of the tightening bolt 6 is efficiently exhibited. At the same time, even if the diameter of the cylindrical leg 9 is small, it can be clamped and fixed well.

  Further, for example, when the support portion 5 has a cylindrical shape and has a structure in which a screwing portion 8 to which the fastening bolt 6 is screwed is formed on the peripheral surface, the screwing portion 8 is formed on the peripheral surface of the support portion 5. By screwing, the screwing portion 8 into which the tightening bolt 6 is screwed can be easily formed at an appropriate position, and the tightening fixing mechanism a can be easily provided.

  In addition, when the support portion 5 has a structure in which the vicinity of the screwing portion 8 is formed thick, the strength of the screwing portion 8 is increased and the cylindrical leg 9 is strongly tightened by the tightening bolt 6. However, it is possible to prevent the thread of the screwing portion 8 from being damaged as much as possible. Therefore, even if the support portion 5 is not formed of a high-strength member such as stainless steel, for example, it is made of aluminum. Even if it is constituted by a lightweight member such as the above, sufficient strength can be obtained in the screwing portion 8. Therefore, the weight can be reduced by constituting the support portion 5 by a light member.

  The support portion 5 is joined to the mounting portion 3 by joining the outer surface on the side facing the direction in which the cylindrical leg 9 is tightened and pressed by the tightening bolt 6 of the tightening fixing mechanism a to the mounting portion 3. In the case where the outer formed surface on the side to be joined to the mounting portion 3 of the support portion 5 is formed so as to be wider in plan view than the inner formed surface, the fastening fixing mechanism a When the tightening bolt 6 is operated, the attaching portion 3 and the auxiliary leg 1 are located at positions opposite to each other via the support portion 5. Leg 1 does not get in the way.

  In addition, since an inclined bearing surface 7 that is inclined in a direction away from the attachment portion 3 is formed on the inner forming surface of the support portion 5 on the side to be joined to the attachment portion 3, the taper is tapered toward the attachment portion 3. Here, if the outer forming surface is also tapered toward the mounting portion 3 in the same manner as the inner forming surface, a plan view of the connecting portion of the support portion 5 and the mounting portion 3 is assumed. The continuous width becomes narrow, and the joining strength when the support portion 5 and the attachment portion 3 are joined is reduced accordingly. In this respect, in the present invention, the outer forming surface is flatter than the inner forming surface. Since it formed so that it might become a visual expansion width, the planar view continuous width of the connection location of the support part 5 and the attachment part 3 also becomes large so much, and the joining strength at the time of joining this connection location will increase.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a mounting portion 3 is provided on the auxiliary leg 1 so as to be movable up and down, and a locking mechanism 2 capable of fixing the mounting portion 3 at a predetermined height of the auxiliary leg 1 is provided on the mounting portion 3. The mounting portion 3 is provided with a support portion 5 for supporting a cylindrical leg 9 such as a work table or a stepladder, and a fastening mechanism a for fastening and fixing the cylindrical leg 9 supported by the support portion 5 with a fastening bolt 6 is provided. An auxiliary leg attached to a cylindrical leg, such as a work table or a stepladder, provided in the support part 5, the pressure contact support surface 4 of the support part 5 to which the cylindrical leg 9 is pressed by the tightening fixing mechanism a, and the tightening Even if the diameter of the cylindrical leg 9 is different from the direction in which the cylindrical leg 9 is clamped and pressed by the fastening bolt 6 of the fixing mechanism a, the cylindrical leg 9 is not tightened. It is configured to be clamped by the fixed fixing mechanism a and supported by pressure contact with the inclined bearing surface 7. It is those related to things.

  In the present embodiment, as shown in FIG. 3, the support portion 5 is formed in a cylindrical shape having a diameter into which the cylindrical leg 9 can be fitted.

  Further, a bottom receiving pin 16 for receiving the bottom of the cylindrical leg 9 fitted in the supporting portion 5 is provided at the lower portion of the supporting portion 5, and the bottom receiving pin 16 is a T-shaped bottom receiving. The pin 16 is inserted from one insertion hole (not shown) provided in the lower portion of the support portion 5 toward the other insertion hole (not shown), and a portion protruding from the other insertion hole is welded and removed. It is a fixed configuration.

  Further, on the upper part of the support part 5, a screwing part 8 to which the fastening bolt 6 of the fastening mechanism a is screwed is provided.

  Further, the support portion 5 is formed with a thickness in the vicinity of the screwing portion 8 so as to increase the strength of the screwing portion 8 and prevent the thread from being damaged.

  Fastening bolts 6 are fastened to the screwing portions 8 so that the cylindrical legs 9 are fastened and pressed against the inner surface of the support portion 5.

  The fastening bolt 6 employs a butterfly bolt as shown in FIG. A bolt with a handle may be adopted.

  Further, the inner surface of the support portion 5 is set to a press contact support surface 4 that presses and supports a cylindrical leg 9 that is fastened by the tightening bolt 6 that is screwed into the screwing portion 8.

  An inclined bearing surface 7 is formed on the pressure bearing surface 4 of the bearing portion 5 on the side facing the direction in which the cylindrical leg 9 is tightened and pressed by the tightening bolt 6.

  The inclined bearing surfaces 7 are formed so as to be opposed to each other at positions where the cylindrical legs 9 are pressed and held, and the opposing distance between the pair of opposed inclined bearing surfaces 7 is a tightening direction in which the cylindrical legs 9 are fastened and fixed. It is formed in a C shape that widens in the opposite direction.

  Specifically, the opposed inclined bearing surface 7 is parallel to the axial direction of the cylindrical leg fitted and inserted into the bearing surface 5, and when viewed in plan as shown in FIG. The fastening bolts 6 that are screwed to each other are formed symmetrically with respect to the screwing direction so as to extend from the upper end to the lower end of the support portion 5.

  Moreover, the support part 5 and the inclined support surface 7 are integrally formed with the member made from aluminum.

  The support portion 5 is provided with an outer surface on the side facing the direction in which the cylindrical leg 9 is tightened and pressed by the tightening bolt 6 of the tightening and fixing mechanism a on a side plate portion 3c (to be described later) of the mounting portion 3. Specifically, in consideration of workability when operating the tightening bolt 6, it opposes the direction in which the cylindrical leg 9 is tightened and pressed by the tightening bolt 6 of the tightening fixing mechanism a. The outer side surface (the outer side surface facing the fastening bolt 6) is joined to the mounting portion 3. That is, when the attachment part 3 or the auxiliary leg 1 is close to the fastening bolt 6, there is a concern that the attachment part 3 or the auxiliary leg 1 becomes an obstacle when the fastening bolt 6 is operated, and the workability is impaired. is there.

  Moreover, the support part 5 and the attachment part 3 are the structures which welded and joined the connection location.

  At this time, since the inner forming surface of the support portion 5 on the side to be joined to the attachment portion 3 is formed with an opposing inclined support surface 7 that is inclined in a direction away from the attachment portion 3 as shown in FIG. If the outer forming surface is also tapered toward the mounting portion 3, it is assumed that the connecting portion 3 and the support portion 5 are connected in plan view. However, in this embodiment, in this embodiment, the side of the support portion 5 to be joined to the mounting portion 3 becomes narrow. Since the outer forming surface is formed so as to be wider in plan view than the inner forming surface, the width in plan view of the connecting portion between the support portion 5 and the mounting portion 3 is increased accordingly, and this connecting portion is joined. In this case, the bonding strength is increased.

  Specifically, the peripheral surface of the support portion 5 has a double structure in which the inclined support surface 7 (opposite inclined support surface 7) is formed of an inner wall portion 17 and an outer wall portion 18 as shown in FIG. The inner wall portion 17 having the double structure is formed on the opposed inclined support surface 7 inclined in a direction away from the attachment portion 3, and the outer wall portion 18 is connected to the attachment portion 3. It is formed so as to be a continuous place to be joined.

  As shown in FIG. 1, the mounting portion 3 to which the support portion 5 is joined is a U-shaped plate-shaped frame composed of an upper plate portion 3a, a lower plate portion 3b, and a side plate portion 3c. An auxiliary leg insertion hole 13 having a diameter through which the auxiliary leg 1 can be inserted is drilled in the plate portion 3a and the lower plate portion 3b, and the auxiliary leg 1 is inserted into the auxiliary leg insertion hole 13. The attachment portion 3 is provided on the auxiliary leg 1 so as to be movable up and down, and the support portion 5 is joined and attached to the outer surface of the side plate portion 3c as described above.

  Further, the attachment portion 3 is provided with a locking mechanism 2 for fixing the attachment portion 3 at a predetermined height of the auxiliary leg 1.

  The locking mechanism 2 includes an anti-degeneration strip 14 and a locking plate 15, and when the locking plate 15 is pushed down with finger pressure, the locking plate 15 becomes free with respect to the auxiliary leg 1, and the mounting portion 3 Is slidable in the vertical direction with respect to the auxiliary leg 1 (movable up and down), and when the finger pressure is released, the locking plate 15 is fixed and maintained with respect to the auxiliary leg 1 by the push-up ridge 14, and the mounting portion 3 Is configured to be fixedly locked to the auxiliary leg 1.

  As shown in FIG. 1, the auxiliary leg 1 has a cylindrical shape and is provided with a grounding board 12 at the lower end via a free joint portion 11.

  Since the present embodiment is configured as described above, a cylindrical leg 9 such as a work table or a stepladder is fitted into the cylindrical support portion 5, and the tightening bolt 6 is screwed into the screwing portion 8 of the support portion 5. Then, when the cylindrical leg 9 is tightened by the tightening bolt 6, the cylindrical leg 9 is pressed against the opposed inclined bearing surface 7 formed on the pressure bearing surface 4 of the bearing 5, and the two inclined surfaces facing each other. The bearing surface 7 and the tightening bolt 6 are pressed and supported by at least three pressure contact points in plan view (in FIG. 2, the two inclined bearing surfaces 7, the pressure bearing surface 4 and the clamps are opposed to each other). It is supported by pressure contact with four pressure contacts of the bolt 6 in plan view.)

  That is, in a conventional auxiliary leg (hereinafter referred to as a conventional machine) attached to a cylindrical leg such as a work bench or a stepladder, the cylindrical leg 9 is attached to the support part 5 by a fastening bolt 6 screwed to the cylindrical support part 5. Since it was only supported by two pressure contact points in plan view on the inner peripheral surface of the fastening bolt 6 and the cylindrical leg 9, it was pressed against the inner peripheral surface of 2 was sufficient in stability in the left-right direction as shown in FIG. 2, but poor in stability in the direction perpendicular to the direction between the two pressure contact points (in the vertical direction as shown in FIG. 2). When an impact or the like is applied in the direction, the cylindrical leg 9 rattles, but in this embodiment, in this embodiment, at least three pressure contact points in plan view are supported by pressure contact. Securely positioning and fixed in all directions Since it has, unconventional Xiu stability is obtained, it does not occur rattling in a cylindrical leg 9 which is pressed against the support by tightening by the tightening bolt 6.

  Moreover, in the conventional machine, the smaller the diameter of the cylindrical leg 9 that is fitted and fixed to the cylindrical support portion 5 is smaller than that of the support portion 5, the backlash becomes more severe and the stability is significantly impaired. Since the workability is impaired, the conventional machine can only be attached and used satisfactorily only on the cylindrical leg 9 having the same diameter as that of the cylindrical support portion 5. In the embodiment, as shown in FIG. 2, the opposed inclined support surface 7 is widened in a C shape in the direction opposite to the tightening direction of the tightening bolt 6, so that the diameter of the cylindrical leg 9 is large or small. Even if it is various, the cylindrical leg 9 can be fastened and fixed with high stability by holding the counter tilted bearing surface 7 in a pinched state and reliably positioning.

  Further, it is symmetrical in plan view with respect to the screwing direction of the tightening bolt 6 and the two inclined bearing surfaces 7 facing each other are formed in parallel to the axial direction of the cylindrical leg 9 to be pressed and supported. As a result, when the cylindrical leg 9 is fastened to the opposite inclined support surface 7 with the fastening bolt 6, even if the diameter of the cylindrical leg 9 is varied, the fastening bolt 6 is securely attached to the shaft of the cylindrical leg 9. Since the screw is screwed in the direction toward the core, the tightening force of the tightening bolt 6 is efficiently exhibited.

  Furthermore, since the conventional machine aimed to improve stability and reduce backlash by lengthening the formation length of the cylindrical-shaped support part 5, the lightness was reduced by that amount. Then, since high stability is obtained by the opposed inclined bearing surface 7 and the tightening bolt 6, it is not necessary to set the formation length of the bearing portion 5 long, and the weight can be reduced accordingly.

  Further, by forming the support portion 5 in a cylindrical shape, the screwed portion 8 to which the tightening bolt 6 is screwed can be easily obtained by simply threading the screwed portion 8 around the peripheral surface of the support portion 5. It is possible to form the tightening and fixing mechanism a easily at an appropriate position, and by forming the vicinity of the threaded portion 8 of the support portion 5 thickly, this threaded portion 8 can be prevented, and even if the cylindrical leg 9 is strongly tightened with the tightening bolt 6, it is possible to prevent the thread of the threaded portion 8 from being damaged. As a result, the support portion 5 is made of stainless steel or the like. There is no need to form the member with high strength. For example, even if it is made of a lightweight member such as aluminum, sufficient strength can be obtained for the screwing portion 8, so that the support portion 5 is made of a light member. Thus, the weight can be reduced.

  Therefore, in this embodiment, when the cylindrical leg 9 such as a work table or a stepladder is inserted into the support portion 5 and is fastened and fixed to the support portion 5 with the tightening bolt 6, the diameter of the cylindrical leg 9 is reduced. This cylindrical leg 9 can be clamped and fixed in a state where the cylindrical leg 9 is securely positioned and fixed to the support portion 5 regardless of the size, so that it is excellent in stability and does not cause rattling. It can be used by being attached to the leg 9 well, and the support portion 5 is made of a lightweight member (aluminum member) and can be made as short as possible to reduce its weight. Excellent workability, and since the support portion 5 has a cylindrical shape, it can be easily tightened to the support portion 5 by forming a threaded portion 8 into which the tightening bolt 6 is screwed on the peripheral wall of the support portion 5. Since the fixing mechanism a can be provided, the manufacturing is easy and the productivity is excellent. Etc., the auxiliary leg attached to the cylindrical leg such innovative platform or ladder was soo been practical.

  In addition, in the present embodiment, the support portion 5 has a configuration in which an outer surface formed on the opposite side surface of the fastening bolt 6 screwed to the screwing portion 8 is attached to the mounting portion 3. The mounting part 3 and the auxiliary leg 1 are positioned opposite to each other via the support part 5, and when operating the tightening bolt 6, the mounting part 3 and the auxiliary leg 1 do not get in the way. Excellent workability and excellent practicality in this respect.

  Further, in this embodiment, the portion of the peripheral surface of the support portion 5 where the opposed inclined support surface 7 is formed is formed in a double structure, and is separated from the mounting portion 3 by the inner wall portion 17 of this double structure. The opposing inclined support surface 7 that inclines in the direction is formed, and the outer wall portion 18 having a double structure is formed so as to be a continuous portion that is connected to the mounting portion 3. The outer forming surface can be formed so as to be widened in plan view as compared with the inner forming surface on the side to be joined. Therefore, the continuous width in plan view of the connecting portion between the support portion 5 and the mounting portion 3 is widened. By joining the connected portions by welding, the joining strength between the support portion 5 and the attachment portion 3 is increased, and this point is also excellent in practicality.

  In the present embodiment, as shown in FIG. 2, the two inclined bearing surfaces 7 facing each other are formed in a C-shape in plan view in which a base end side is provided with a predetermined interval via the pressure contact bearing surface 4. However, for example, the base end sides of the two inclined bearing surfaces 7 facing each other may be formed in a V-shape in plan view by connecting them continuously without providing a predetermined interval. In this case, the cylindrical leg 9 having a smaller diameter is pressure-contacted and supported by the opposed inclined support surface 7 formed in a V shape in plan view, and can be securely positioned and fixed by fastening.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is a schematic perspective view which shows a present Example. It is an explanatory top view of the principal part concerning a present Example. It is a schematic perspective view which shows the usage condition of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Auxiliary leg 2 Locking mechanism 3 Attachment part 4 Pressure contact bearing surface 5 Bearing part 6 Tightening bolt 7 Inclined bearing surface, opposing inclined bearing surface 8 Screwing part 9 Cylindrical leg a Tightening fixing mechanism

Claims (6)

  A mounting portion is provided on the auxiliary leg so as to be movable up and down, and a locking mechanism capable of fixing the mounting portion at a predetermined height of the auxiliary leg is provided on the mounting portion, and a cylindrical leg such as a work table or a stepladder is provided on the mounting portion. An auxiliary leg that is attached to a cylindrical leg, such as a work table or a stepladder, provided with a support part for supporting the support part, and a fastening mechanism for fastening the cylindrical leg supported by the support part with a fastening bolt. A pressure bearing surface of a bearing portion to which the cylindrical leg is pressed by the tightening and fixing mechanism, and an inclined bearing on a side opposite to a direction in which the cylindrical leg is tightened and pressed by a tightening bolt of the tightening and fixing mechanism. Even if the diameter of the cylindrical leg is different, the work table is configured so that the cylindrical leg is clamped by the tightening and fixing mechanism and supported by pressure contact with the inclined support surface. Auxiliary legs that can be attached to cylindrical legs such as stairs and stepladders.   The inclined support surfaces are formed in a state of being opposed to each other at a position where the cylindrical legs are pressed and clamped, and the opposing distance between the pair of opposed inclined support surfaces is widened in a direction opposite to the tightening direction for fastening and fixing the cylindrical legs. The auxiliary leg attached to a cylindrical leg such as a work table or a stepladder according to claim 1, wherein the auxiliary leg is formed in a shape.   The opposed inclined support surface is formed in a shape parallel to the axial direction of the cylindrical leg to be pressure-supported and symmetrical in plan view with respect to the screwing direction of the tightening bolt of the tightening fixing mechanism. The auxiliary leg attached to a cylindrical leg such as a work table or a stepladder according to claim 2.   The work table or stepladder according to any one of claims 1 to 3, wherein the support portion has a cylindrical shape, and has a structure in which a screwing portion into which a fastening bolt is screwed is formed on a peripheral surface. Auxiliary legs to be attached to the cylindrical legs.   The auxiliary leg attached to a cylindrical leg such as a work table or a stepladder according to claim 4, wherein the support part has a structure in which the vicinity of the screwing part is formed thick. The support portion has a configuration in which an outer surface on a side opposite to a direction in which the cylindrical leg is tightened and pressed by a tightening bolt of the tightening and fixing mechanism is joined to the attachment portion and attached to the attachment portion. The work table according to any one of claims 1 to 5, wherein the outer forming surface on the side to be joined to the mounting portion is formed so as to be wider in plan view than the inner forming surface. Auxiliary legs that can be attached to cylindrical legs such as stairs and stepladders.

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