JP2013136338A - Screw member fixing structure and screw member fixing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new screw member fixing structure for fixing a screw members to various members, a screw member fixing method, and a carriage using the screw member fixing structure.SOLUTION: There is provided the screw member fixing structure that includes the screw member 11 having a male screw 13 on a shaft portion 12 and a base body 21 to which the screw member 11 is fixed, and that fixes the screw member 11 to the base body 21. The screw member 11 is mounted to an auxiliary member 31, and the auxiliary member 31 includes an auxiliary side joint face 32 and an auxiliary side surface 33 being an face opposite from the auxiliary side joint face 32. At least a part of the male screw 13 of the shaft portion 12 is protruded from the auxiliary side surface 33 and the auxiliary side joint face 32 is joined to a base body side joint face 23 of the base body 21, the auxiliary side joint face 32 is fusion-bonded or adhered to the base body side joint face 23, and thus the joining is performed. There also provided the screw member fixing method and the carriage in which casters are mounted to a frame by using the screw member fixing structure.

Description

The present invention relates to a screw member fixing structure and a screw member fixing method. The present invention also relates to a cart using a screw member fixing structure.

A cart for placing a load and transporting the load is composed of a gantry on which the load is placed and a caster fixed to the lower surface thereof. Conventionally, as a method of fixing and attaching a caster to a pedestal, a method of fixing using a bolt, a nut and a screw, a method of fixing a caster to a pedestal without using a bolt or screw, and the like are used.

JP 09-207504 A Japanese Utility Model Publication No. 05-047521

For example, a conventional cart 61 that employs a hollow panel in which a gantry has a honeycomb structure is known. Since this hollow panel is hollow, the casters 66 could not be firmly fixed with bolts. For this reason, the hollow panel is sandwiched between metal plates 65 having a certain area on both sides of the hollow panel to prevent the bolt from sinking. Specifically, as shown in FIG. 7, a frame 62 made of a hollow panel, metal plates 65 provided at four corners of the upper surface 63, and casters of casters 66 provided on the lower surface 64 of the frame. The plate 67 was fastened with bolts 68 and nuts 69. However, with this structure, a step is generated between the metal plate 65 provided at the four corners of the upper surface 63 of the gantry and the upper surface 63 of the gantry not provided with the metal plate 65, and there is a gap between the two. As a result, there is a risk that the transported baggage will be caught by a step and the loaded baggage may be damaged or the baggage may fall from the cart, and the cart itself will not look good.

In addition, when using a method for fixing casters to a gantry without using bolts or screws (for example, Patent Document 1), there is no step on the upper surface of the gantry because there is no hole penetrating the gantry. It becomes complicated.

On the other hand, as shown in Patent Document 2, there is a welding bolt for joining and fixing a metal bolt to a metal member by welding.

In view of this, the present invention has an object to provide a screw member fixing structure and a screw member fixing method in which screw members can be attached to various bases such as bases that are difficult to fasten with bolts such as hollow panels. And It is another object of the present invention to provide a cart in which a caster is attached to a gantry by the fixing structure of the screw member.

In order to solve the above problems, the present invention includes a screw member having a male screw or a female screw, and a base to which the screw member is fixed, and the screw member is fixed to the base. The auxiliary member includes an auxiliary side joining surface and an auxiliary side surface that is a surface opposite to the auxiliary side joining surface, and the auxiliary member includes the auxiliary side joining surface as the base body. A screw member fixing structure characterized in that the joining is made by fusing or bonding the auxiliary side joining surface and the base side joining surface. I will provide a.

The present invention works advantageously when the substrate is a hollow panel or the like, which is usually difficult to be firmly screwed.
The auxiliary-side bonding surface and the base-side bonding surface are made of synthetic resin, and the auxiliary member includes a through-hole penetrating the auxiliary-side bonding surface and the auxiliary-side surface, and the screw member is disposed in the through-hole. It is arranged, and the center axis of the screw member can be implemented as extending in substantially the same direction as the axial direction of the through hole.

More specifically, when the screw member is provided with a male screw at the shaft portion, a head portion having a diameter larger than the diameter of the shaft portion is provided at one end of the shaft portion. Preferably, an accommodation space for accommodating the head is provided in at least one of the auxiliary side joining surface and the base body side joining surface, and the screw member extends from the auxiliary side joining surface to the through hole. It is inserted, and at least a part of the male screw of the shaft portion may protrude from the auxiliary side surface.
The screw member may be implemented as a nut having an internal thread. In this case, an accommodation space for accommodating the nut is provided in at least one of the auxiliary side joining surface and the base body side joining surface. The nut is sandwiched between the auxiliary side joining surface and the base side joining surface by fusing or bonding. A bolt to be screwed into the nut is inserted from the through hole and screwed into the nut.

Furthermore, the screw member is flush with the auxiliary side joining surface or does not protrude to the base side from the auxiliary side joining surface, so that processing on the base side for fusion or adhesion is unnecessary. Become.

Further, the present invention provides a method of fixing a screw member having a male screw or a female screw to a base, and includes an auxiliary member having an auxiliary side joining surface and an auxiliary side surface that is a surface opposite to the auxiliary side joining surface. And a step of attaching the screw member to the auxiliary member and a step of joining the auxiliary side joining surface to the base side joining surface of the base, wherein the auxiliary side joining surface and the base side joining surface are fused. The screw member fixing method is characterized in that the joining step is performed by being attached or bonded.

Furthermore, the present invention is a cart including a platform on which a load is placed and a caster fixed to a lower surface of the platform, and the caster is attached to the platform by the fixing structure of the screw member. The carriage is the base, the bottom surface of the base is the base-side joining surface, and the caster is fixed to the bottom surface of the base by the screw member. To do.

In the invention of the present application, the base and the auxiliary member equipped with the screw member are joined to each other by fusing or bonding the base-side joining surface of the base and the auxiliary-side joining surface of the auxiliary member, and the screw fixing the screw member to the base By forming the member fixing structure, it is possible to provide a new screw member fixing structure and a new screw member fixing method. Moreover, the fixing structure of the screw member according to the present invention can be applied to various structures that fix parts by bolts, nuts, and screws. Further, the screw member fixing structure according to the present invention has a simple structure and a small number of parts.

Further, in the invention of the present application, the gantry is composed of the above-mentioned base, and the trolley having the caster attached to the gantry is formed by the fixing structure of the screw member. Was able to provide.

It is explanatory drawing which shows the fixing structure of the screw member which concerns on one Embodiment of this invention. It is explanatory drawing which shows the fixing method of the screw member which concerns on one Embodiment of this invention, (A) The process which provides a through-hole in an auxiliary member, (B) A screw member is inserted in a through-hole, and the axial part of a screw member is shown. Attaching the screw member to the auxiliary member so that at least a part of the male screw protrudes from the auxiliary side surface of the auxiliary member; (C) joining the auxiliary side joining surface of the auxiliary member to the substrate side joining surface of the substrate; It is explanatory drawing which shows the process to perform. It is explanatory drawing which shows the trolley | bogie which concerns on one Embodiment of this invention. It is explanatory drawing which shows the attachment of the caster in the trolley | bogie which concerns on one Embodiment of this invention, (A) The state which fixed the caster 46 to the screw member 11 with which the auxiliary member 31 was mounted | worn with the internal thread 51 beforehand, (B) The mount frame 43 This shows a state where the base side joining surface 45 and the auxiliary side joining surface 32 of the auxiliary member 31 in the state of (A) are joined by fusion or adhesion and the casters 46 are attached to the gantry 43. It is explanatory drawing which shows the trolley | bogie which concerns on one Embodiment of this invention. It is explanatory drawing which shows the fixation structure of the screw member which concerns on other embodiment of this invention. It is explanatory drawing which shows an example of the conventional trolley | bogie.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. It should be noted that the expressions of the top, bottom, front, back, left and right in the claims and the description of the present application only indicate a relative positional relationship, and do not specify an absolute position.
As shown in FIG. 1, the screw member fixing structure 10 according to the present invention includes a screw member 11, a base 21, and an auxiliary member 31.

If the screw member 11 has the external thread 13 in the axial part 12, it will not be specifically limited. A commercially available screw member can be used. Examples include hexagon bolts, hexagon socket head cap screws, countersunk cap bolts, stud bolts, and the like. When the head portion 14 is provided with one end of the shaft portion 12, the head portion 14 has a diameter larger than the diameter of the shaft portion 12. Further, all of the shaft portion 12 of the screw member 11 may have the male screw 13, or may have the male screw 13 in a part from one end of the shaft portion 12 to the other end. 11 may have a male screw 13 at a part thereof from one end and the other end of the shaft portion 12 toward the center of the shaft portion 12. In this embodiment, a countersunk cap bolt having a countersunk head 14 is used as the screw member 11. The head portion 14 of the countersunk cap bolt is provided at one end of the shaft portion 12, has a diameter larger than the diameter of the shaft portion 12, and extends from the other end of the shaft portion 12 toward one end of the shaft portion 12. Has a male thread.

In the present embodiment, the base 21 is formed of a plate-like member, and more specifically, a synthetic resin between two rectangular thin plate members 24 made of synthetic resin that constitute the upper surface 22 and the lower surface of the plate-like member. A honeycomb structure plate sandwiching a core material 25 having a honeycomb structure is used, and one of the two thin plate members serves as the substrate-side bonding surface 23. In the present embodiment, the lower surface of the substrate 21 is the substrate-side bonding surface 23.

The base body 21 is not limited to the plate-like member having the core member 25 as in the present embodiment. For example, the base member 21 has a single-layer structure made of synthetic resin, or at least one of the upper surface and the lower surface is made of synthetic resin. It may be a laminate structure of two or more layers having these layers. Moreover, the base | substrate 21 may be not only a plate-shaped member but a box shape or a block shape, and the shape is not ask | required. The shape of the base 21 may be appropriately set according to the use of the screw member fixing structure 10 according to the present application. In order to be fused and bonded to an auxiliary member 31 described later, it is only necessary to provide a base-side bonding surface 23 made of synthetic resin on at least one surface of the base 21. Materials other than the base-side bonding surface 23 are particularly limited. Not. A plurality of surfaces of the substrate 21 may be provided with a substrate-side bonding surface made of synthetic resin. Further, in order to increase the fusion strength, the substrate-side bonding surface 23 may be provided with unevenness. As in the present embodiment, when the substrate 21 is made of the above-described honeycomb structure plate, the honeycomb structure plate has an advantage that it can be provided with strength while being lightweight. Although there is a disadvantage that it is difficult to screw together, the use of the structure according to the present invention provides an effect that the screw can be firmly fixed.

In the present embodiment, the auxiliary member 31 is a rectangular plate-shaped member made of synthetic resin, the upper surface of which is the auxiliary side bonding surface 32, and the surface opposite to the auxiliary side bonding surface 32, that is, the upper surface thereof. The opposing lower surface is an auxiliary side surface 33. The auxiliary member 31 is not limited to a single-layer structure as in the present embodiment, and for example, has a laminated structure of two or more layers in which at least one of the upper surface and the lower surface has a synthetic resin layer. It may be one having a core material. The auxiliary member 31 is not limited to a plate-like member, and may be a box shape or a block shape, and the shape thereof is not limited. What is necessary is just to set the shape of the auxiliary member 31 suitably according to the use of the fixing structure 10 of the screw member which concerns on this application. In order to fuse and bond to the base body 21, at least one auxiliary member 31 is provided with a synthetic resin auxiliary side bonding surface 32, and an auxiliary side surface 33 is provided on the surface facing the auxiliary side bonding surface 32. The material other than the auxiliary side joining surface 32 is not particularly limited. Further, in order to increase the fusion strength, the auxiliary side joining surface 32 may be provided with irregularities. In the case of bonding by fusion, at least one of the aforementioned meltable substrate side bonding surface 23 and auxiliary side bonding surface 32 is made of a meltable material. There is no such restriction, and the degree of freedom of material increases.

The screw member 11 is attached to the auxiliary member 31. In the present embodiment, four through holes 34 penetrating the auxiliary side joining surface 32 and the auxiliary side surface 33 are provided in the vicinity of the four corners of the auxiliary member 31, and these through holes 34 are formed in the screw member 11. A housing space 35 for housing the head portion 14 of the screw member 11 and an insertion hole 36 for inserting the shaft portion 12 of the screw member 11. By inserting the screw member 11 into these insertion holes 36, the screw The member 11 is attached to the auxiliary member 31. The position and number of the through holes 34 provided in the auxiliary member 31 are not particularly limited.

The accommodation space 35 is formed from the auxiliary side joining surface 32 of the auxiliary member 31 toward the auxiliary side surface 33, and the depth thereof is not particularly limited as long as the head portion 14 of the screw member 11 can be accommodated. In the above-described through hole 34, a portion other than the accommodation space 35 becomes an insertion hole 36 of the shaft portion. Therefore, the surface provided with the accommodation space 35 becomes the auxiliary side joining surface 32, and the surface provided with the insertion hole 36 becomes the auxiliary side surface 33. Then, the screw member 11 is attached to the auxiliary member 31 so that at least a part of the male screw 13 of the shaft portion 12 of the screw member 11 protrudes from the auxiliary side surface 33 of the auxiliary member 31.

In this embodiment, the shaft portion insertion hole 36 is not formed with a female screw and does not screw with the male screw 13 provided in the shaft portion 12. Is approximately equal to or greater than the outer diameter of the male thread.

As described above, by providing the auxiliary member 31 with the accommodating space 35 and accommodating the head portion 14 of the screw member 11, the screw member 11 is flush with the auxiliary-side joining surface 32 or from the auxiliary-side joining surface 32. Since it does not protrude to the side, processing on the base 21 side for fusing or bonding becomes unnecessary.

In the present embodiment, the auxiliary member 31 is provided with the screwless through hole 34 that is not screwed into the male screw 13 of the shaft portion 12, but the screw member 11 is attached to the auxiliary member 31 without such a through hole 34. You may wear it. For example, although not shown, the through hole 34 and the shaft portion 12 may be screwed together. Specifically, a female screw may be formed in the through hole 34, and the shaft portion 12 may be screwed into the through hole 34. Alternatively, a screw member 11 having a threading function such as a tapping screw may be used for penetration. The hole 34 may be formed with the screw member 11 without initially forming a female thread in the hole 34. Further, the through hole 34 itself may be formed by the screw member 11 using a screw member 11 having a drill function and a screw machining function such as a drilling and tapping screw. Moreover, you may comprise the through-hole 34 from both the part in which the internal thread was formed, and a non-screw part. It is not always necessary to provide the accommodation space 35 in the through hole 34.

In any case, the screw member 11 is attached to the auxiliary member 31 so that at least a part of the male screw 13 of the shaft portion 12 of the attached screw member 11 protrudes from the auxiliary side surface 33 of the auxiliary member 31.

In the present embodiment, the accommodation space 35 is provided in the auxiliary member 31, but the accommodation space 35 may be provided in at least one of the base body 21 and the auxiliary member 31, and may be provided in both. Further, when the screw member 11 having no head is used for the screw member fixing structure 10 according to the present invention, neither the base body 21 nor the auxiliary member 31 need be provided with the accommodating space 35. When the base 21 is provided with a storage space, the storage space can be implemented as being formed from the base-side joining surface 23 of the base 21 toward the facing surface.

In the screw member fixing structure 10 according to the present invention, the base-side joining surface 23 of the base 21 and the auxiliary-side joining surface 32 of the auxiliary member 31 to which the screw member 11 is attached are joined by fusion or adhesion. Formed by. The fusion method is not particularly limited as long as the base-side joining surface 23 of the base 21 and the auxiliary-side joining surface 22 of the auxiliary member 11 can be joined together by fusion. Examples include hot plate welding, spin welding, ultrasonic welding, vibration welding, and the like. The screw member 11 fixed to the auxiliary member 31 is bonded to the substrate by bonding the substrate-side bonding surface 23 of the substrate 21 and the auxiliary-side bonding surface 32 of the auxiliary member 31 to which the screw member 11 is mounted by fusing or bonding. The screw member fixing structure 10 according to the present invention is formed.

When the base-side joining surface 23 of the base 21 and the auxiliary-side joining surface 32 of the auxiliary member 31 to which the screw member 11 is attached are joined by fusion, the entire auxiliary-side joining surface 32 is joined by fusion. The screw member fixing structure 10 according to the present invention can also be formed by bonding a part of the auxiliary-side bonding surface 32 to the base-side bonding surface 23 by fusion. .

Various members may be fixed to the screw member 11 before the screw member 11 is fixed to the base body 21 or after the screw member 11 is fixed to the base body 21. For example, a state in which various members are fixed to the screw member 11 attached to the auxiliary member 31, more specifically, a shaft portion protruding from the auxiliary side surface 33 of the auxiliary member 31 by attaching the screw member 11 to the auxiliary member 31. In a state where various parts are fixed to at least a part of the male screw 13 of 12 by using female screws, the base-side joining surface 23 of the base 21 and the auxiliary-side joining surface 32 of the auxiliary member 31 are joined by fusion or adhesion. Accordingly, the screw member fixing structure 10 according to the present invention may be formed, and the base-side joining surface 23 of the base 21 and the auxiliary-side joining surface 32 of the auxiliary member 31 to which the screw member 11 is attached are fused. After joining by attachment or adhesion, various parts may be fixed to the screw member 11 fixed to the base body 21 using female screws.

In the screw member fixing structure 10 according to the present invention, the base member side joining surface 23 of the base member 21 and the auxiliary side joining surface 32 of the auxiliary member 31 to which the screw member 11 is attached are joined by fusion bonding. It is desirable to use a metal.

In this embodiment, polypropylene (PP) is used as the synthetic resin for forming the substrate-side bonding surface 23 of the substrate 21 and the auxiliary-side bonding surface 32 of the auxiliary member 31, but a thermoplastic resin that can be fused and bonded together. If it has the intensity | strength according to a use, it will not specifically limit. Examples include ABS, PP, PS, PE, POM, PBT, and the like. The types of synthetic resins that form the base-side bonding surface 23 of the base 21 and the auxiliary-side bonding surface 32 of the auxiliary member 31 may be different, but the base-side bonding surface 23 of the base 21 and the auxiliary-side bonding surface of the auxiliary member 31 are different. 32 is preferably formed of the same type of synthetic resin. Further, when bonding by an adhesive is used as the bonding means, the substrate-side bonding surface 23 of the substrate 21 and the auxiliary-side bonding surface 32 of the auxiliary member 31 do not need to be a thermoplastic resin and can be bonded by an adhesive. Various materials can be selected.

Various components can be fixed to the screw member fixing structure 10 according to the present invention, specifically, the screw member 11 fixed to the base body 21 using female screws. As described above, the screw member 11 may be fixed to the base member 21 after various members are fixed to the screw member 31 using the female screw before the screw member 31 is fixed to the base member 21.

The screw member fixing structure 10 according to the present application has various parts fixed to the screw member fixing structure 10 according to the present application, and the parts do not fall. It is desirable to have such a strength that the function can be continued.

The screw member fixing structure 10 according to the present invention can be used to attach various parts to be fixed using a female screw such as a nut. Moreover, the fixing structure 10 of the screw member according to the present invention can be applied to various structures that fix parts by bolts, nuts, and screws. Further, the screw member fixing structure 10 according to the present invention has a simple structure and a small number of parts.

The screw member fixing method according to the present invention is a method for fixing the screw member 11 having the male screw 13 to the shaft portion 12 to the base body 21. Specifically, the screw member 11 and the base body 21 described above are used. (1) At least a part of the male screw 14 of the shaft portion 12 of the screw member 11 protrudes from the auxiliary surface 33 of the auxiliary member 31. Thus, the step of attaching the screw member 11 to the auxiliary member 31 and (2) the step of joining the auxiliary side joining surface 32 of the auxiliary member 31 to the base side joining surface 23 of the base 21 are provided. In the present embodiment, in the step (1), as shown in FIG. 2A, the through-hole 34 (the accommodation space 35 and the insertion) that penetrates the auxiliary-side joining surface 32 and the auxiliary-side surface 33 of the auxiliary member 31. The step of providing the hole 36) in the auxiliary member 31, and as shown in FIG. 2B, the screw member 11 is inserted into the through hole 34, and at least a part of the male screw 13 of the shaft portion 12 of the screw member 11 is auxiliary. A step of attaching the screw member 11 to the auxiliary member 31 so as to protrude from the auxiliary side surface 32 of the member 31 is provided. The screw member 11 is attached to the auxiliary member 31 simply by being inserted and not screwed, but the shaft portion 12 may be screwed to the auxiliary member 31.
In the step (2) of the present embodiment, as shown in FIG. 2C, the auxiliary side bonding surface 32 of the auxiliary member 31 and the base side bonding surface 23 of the base 21 are fused or bonded. In this way, a process of joining the two is performed.

Next, an example of the carriage 41 in which the caster 46 is attached to the gantry 43 by the screw member fixing structure 10 according to the present invention will be described.
As shown in FIG. 3, the cart 41 according to the present invention includes a gantry 43 and casters 46.

The gantry 43 is used for placing a load. In the present application, the base 21 in the screw member fixing structure 10 according to the present invention is the gantry 43, and the lower surface thereof is the base-side joining surface 45. In addition, near the four corners of the base-side joining surface 45 of the gantry 43, the auxiliary-side joining surfaces 32 of the plurality of auxiliary members 31 to which the screw members 11 are attached are joined by fusion or adhesion. At least a part of the male screw 13 of the shaft portion 12 of the screw member 11 protrudes from the auxiliary surface 33 of the auxiliary member 31. That is, the fixing structure 42 of the screw member according to the present invention is formed by the gantry 43, the auxiliary member 31, and the screw member 11, and the screw member 11 is fixed to the gantry 43.

In this embodiment, the gantry 43 is a polypropylene honeycomb core material between two rectangular thin plate members made of polypropylene, as in the embodiment of the base 21 of the screw member fixing structure 10 according to the present invention. The screw plate 11 is made of a metal plate cap bolt, and the auxiliary member 31 is a polypropylene plate member made of polypropylene.

The caster 43 is fixed to the lower surface 45 of the gantry and is not particularly limited as long as it is an imposition type caster provided with a caster plate 47 and the like. Commercially available imposition type casters can be used. For example, it may be a fixed caster in which the wheel moves only in one direction (front-rear direction), or may be a free caster in which the wheel moves freely. Moreover, you may use the caster provided with the lock | rock and the brake. There are no particular restrictions on the material.

The cart 41 according to the present invention is formed by fixing a caster 46 to the lower surface 45 of the gantry 43. More specifically, the caster plate 47 provided on the caster 46 is fixed to the screw member fixing structure 42 according to the present invention, specifically, the screw member 11 fixed to the gantry 43 using the female screw 51. Thus, the caster 46 is attached to the gantry 43. That is, in the cart 41 according to the present invention, the casters 46 are attached to the gantry 43 by the screw member fixing structure 42 according to the present invention. The attachment position of the casters 46 to the gantry 43 and the number thereof may be selected as appropriate.
In the present embodiment, a nut is used as the female screw 51.

4A and 4B, the caster 46 is fixed to the screw member 11 attached to the auxiliary member 31 in advance with the female screw 51. More specifically, the screw member 11 is attached to the auxiliary member 31. In this state, the caster 46 is fixed to at least a part of the male screw 13 of the shaft portion 12 protruding from the auxiliary side surface 33 of the auxiliary member 31 by using the nut 51, and the base side joining surface 45 of the gantry 43 and the auxiliary member 31. The casters 46 can be attached to the gantry 43 also by joining the auxiliary side joining surface 32 to each other by fusing or bonding. In short, the caster 46 may be fixed to the screw member 31 before the screw member 31 is fixed to the gantry 43 or after the screw member 31 is fixed to the gantry 43. In FIG. 4B, a solid line is provided at the boundary between the auxiliary side joining surface 32 of the joined auxiliary member 31 and the base side joining surface 45 of the gantry 43.

The strength of the carriage 41 according to the present application is assumed to be equal to that of a conventional carriage. Moreover, the cart 41 according to the present invention may be provided with a handle for pushing on the upper surface 44 of the gantry or a brake, if necessary.

The cart 41 according to the present invention needs to be provided with a metal plate for mounting bolts on the upper surface 44 of the gantry, as compared with a cart of the type in which casters 66 are attached to the lower surface 64 of the gantry using conventional bolts 68 and nuts 69. Since there is no step, there is no step on the upper surface 44 of the gantry, and there is no fear that the loaded luggage will be caught by the step and damaged or the luggage will fall from the carriage 41. Moreover, the cart 41 according to the present invention may have a good appearance of the cart itself (see FIGS. 5 and 7).

Also, the cart 41 according to the present invention has the same number of parts as the conventional cart in which the casters 66 are attached to the lower surface 64 of the gantry using the bolts 68 and nuts 69. Simple.

The present invention can be implemented with various modifications within the scope of the claims. For example, in the previous embodiment, the screw member 11 having a male screw is used, but is shown in FIG. As described above, a screw (nut) having an internal thread can also be used. In FIG. 6, parts that are substantially the same as those in the previous embodiment are given the same reference numerals, and descriptions thereof are omitted.

In this embodiment, as the through hole 34, one having an accommodation space 35 and an insertion hole 36 can be used, and the screw member 11 is attached to the accommodation space 35. Another fastening member t <b> 1 is inserted into the insertion hole 36 and screwed into the screw member 11. As the other fastening member t1, a shaft portion t2 having a male screw and a bolt having a head portion t3 on the proximal end side of the shaft portion t2 can be used.

As an example of the fixing method, the screw member 11 is mounted in the accommodation space 35 of the auxiliary member 31, and the shaft portion t2 is inserted into the insertion hole 36 with a fastened object (not shown) sandwiched as necessary. Then, the screw member 11 is screwed. Thereafter, the auxiliary-side joining surface 32 of the auxiliary member 31 and the base-side joining surface 23 of the base 21 are joined by adhesion or welding.

As an example of another fixing method, the screw member 11 is mounted in the accommodation space 35 of the auxiliary member 31, and the auxiliary-side joining surface 32 of the auxiliary member 31 and the base-side joining surface 23 of the base 21 are bonded or welded. Join. Thereafter, the shaft portion t <b> 2 is inserted into the insertion hole 36 with the object to be fastened (not shown) sandwiched as necessary, and is screwed into the screw member 11.

In any of the examples, the direction in which the central axis of the screw member 11 extends and the axial direction of the through-hole 34 are matched so that the screw member 11 can be appropriately screwed. In the case where the screw member 11 is a polygonal nut, it is preferable that the accommodation space 35 be a polygonal shape to prevent rotation.

DESCRIPTION OF SYMBOLS 10 Fixing structure of screw member 11 Screw member 12 Shaft 13 Male screw 14 Head 21 Base body 22 Upper surface of base 23 Base side joint surface, base bottom surface 24 Thin plate member 25 Core material 31 Auxiliary member 32 Auxiliary side joint surface, top surface of auxiliary member 33 Auxiliary side surface, bottom surface of auxiliary member
34 Through-hole 35 Accommodating space 36 Insertion hole 41 Bogie 42 Screw member fixing structure 43 Mounting base 44 Mounting base upper surface 45 Base side joint surface, mounting base bottom face 46 Caster 47 Caster plate 51 Female screw, nut 61 Conventional carriage 62 Mounting base 63 Mounting base Upper surface 64 Lower surface of mount 65 Metal plate 66 Caster 67 Caster plate 68 Bolt 69 Nut

Claims (6)

In a structure including a screw member having a male screw or a female screw and a base to which the screw member is fixed, and fixing the screw member to the base.
The screw member is attached to the auxiliary member,
The auxiliary member includes an auxiliary side joining surface and an auxiliary side surface that is a surface opposite to the auxiliary side joining surface,
The auxiliary member is formed by bonding the auxiliary side bonding surface to the base side bonding surface of the base body,
The screw member fixing structure, wherein the joining is performed by fusing or bonding the auxiliary side joining surface and the base side joining surface. The substrate is a hollow panel;
The auxiliary side joining surface and the substrate side joining surface are made of synthetic resin,
The auxiliary member includes a through-hole penetrating the auxiliary-side joint surface and the auxiliary-side surface, the screw member is disposed in the through-hole, and a central axis of the screw member is an axial direction of the through-hole The screw member fixing structure according to claim 1, wherein the screw member fixing structure extends substantially in the same direction. The screw member includes a shaft portion having a male screw, and a head portion having a diameter larger than the diameter of the shaft portion at one end of the shaft portion,
An accommodation space for accommodating the head is provided in at least one of the auxiliary side joining surface and the base body side joining surface, and the screw member is inserted into the through hole from the auxiliary side joining surface. 3. The screw member fixing structure according to claim 2, wherein at least a part of the male screw of the shaft portion protrudes from the auxiliary side surface. The screw member fixing structure according to any one of claims 1 to 3, wherein the screw member is flush with the auxiliary side joining surface or does not protrude from the auxiliary side joining surface to the base side. In a method of fixing a screw member having a male screw or a female screw to a base,
Using an auxiliary member provided with an auxiliary side joining surface and an auxiliary side surface that is a surface opposite to the auxiliary side joining surface,
Attaching the screw member to the auxiliary member;
Bonding the auxiliary side bonding surface to the substrate side bonding surface of the substrate,
The screw member fixing method, wherein the joining step is performed by fusing or bonding the auxiliary side joining surface and the base body side joining surface. A carriage provided with a platform on which luggage is placed and a caster fixed to the lower surface of the platform,
By the fixing structure of the screw member according to any one of claims 1 to 4, the caster is attached to the gantry.
The base is the base, and the bottom surface of the base is the base-side joining surface;
The cart, wherein the caster is fixed to a lower surface of the gantry by the screw member.