Fastener, fastening method and fixture

Abstract

To improve fastening strength in fastening with a fastener.SOLUTION: A fastener for fastening a member to be fastener has: a hollow rivet body 20 inserted into a hole 71 of a first member 70 and a hole 73 of a second member 72, and having a flange 22; a mandrel 30 inserted into the rivet body 20; and a metal washer 40 arranged at least one of an interval between a deformation part 24 of the rivet body 20 and the second member 72 and an interval between the flange 22 and the first member 70.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to fasteners, fastening methods and tools. [Background technology]

[0002] Blind rivets have been known as fastening devices for some time. Patent Document 1 discloses a blind rivet comprising a hollow rivet body having a shank and a flange at one end of the shank, and a mandrel having an outer diameter large enough to fit into the hollow hole in the rivet body, a shank longer than the rivet body, and a head at one end of the shank. To fasten components using such a blind rivet, the shank of the mandrel is first inserted into the shank of the rivet body so that the mandrel head is positioned at the end of the shank opposite the flange of the rivet body. Next, the rivet body is inserted, with the mandrel head leading, into the mounting hole of the components until the flange contacts the surface. Next, with the rivet body still inserted, the mandrel shank is pulled from the flange side, causing the shank of the rivet body to expand and buckle, and the mandrel shank to break, fastening the components. Using a blind rivet allows fastening components to be fastened from one side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 171910 / 1983 Summary of the Invention [Problem to be solved by the invention]

[0004] With blind rivets, it is difficult to increase the shape of the rivet body shank after it expands and buckles, i.e., the deformed shape of the rivet body shank, and so the size is limited. If the deformed shape of the rivet body shank is small, when an external force is applied along the axial direction, the rivet body shank may sink into the fastened parts or slip out of the mounting hole in the fastened parts, resulting in a decrease in fastening strength. On the other hand, in order to increase the deformed shape of the rivet body shank, it is necessary to use a material for the rivet body shank that is more easily deformed or to make the shank thinner, but this would actually decrease the strength of the entire blind rivet. The present invention has been made in consideration of the above-mentioned problems, and has as its object to improve the fastening strength when fastening using a fastener. [Means for solving the problem]

[0005] The fastener of the present invention is a fastener for fastening workpieces, and is characterized by having a hollow rivet body having a flange that is inserted into a hole in the workpieces, a mandrel that is inserted into the rivet body, and a reinforcing member that is placed at least either between the deformed portion of the rivet body and the workpieces or between the flange and the workpieces. [Effects of the Invention]

[0006] According to the present invention, the strength of fastening can be improved when fastening using a fastener. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a blind rivet according to a first embodiment. [Figure 2] FIG. 10 is a diagram showing an example of fastened members fastened with a blind rivet of a comparative example. [Figure 3A] FIG. 2 is a diagram for explaining an example of a method for fastening a blind rivet according to the first embodiment. [Figure 3B]FIG. 2 is a diagram for explaining an example of a method for fastening a blind rivet according to the first embodiment. [Figure 3C] FIG. 2 is a diagram for explaining an example of a method for fastening a blind rivet according to the first embodiment. [Figure 3D] FIG. 2 is a diagram for explaining an example of a method for fastening a blind rivet according to the first embodiment. [Figure 4] FIG. 10 is a diagram illustrating an example of a method for fastening a blind rivet according to the second embodiment. [Figure 5] FIG. 10 is a perspective view showing an example of a workbench according to a fourth embodiment. [Figure 6] FIG. 2 is a cross-sectional view showing a part of the workbench. DETAILED DESCRIPTION OF THE INVENTION

[0008] A blind rivet as a fastener according to this embodiment will be described below with reference to the drawings. First Embodiment First, a blind rivet 10 according to a first embodiment will be described. FIG. 1 is a diagram showing an example of the configuration of a blind rivet 10. As shown in FIG. The blind rivet 10 comprises a rivet body 20 , a mandrel 30 , and a washer 40 .

[0009] The rivet body 20 is a hollow cylinder made of a metal such as aluminum alloy or iron. The rivet body 20 has a shank 21 and a flange 22. The shank 21 has an internal hole 23 that runs along the axial direction. The approximate center of the shank 21 functions as a deformation portion 24 that expands and buckles when fastened components are fastened. The flange 22 is formed integrally with the shank 21 at the other end thereof.

[0010] The mandrel 30 is axially shaped and made of a metal such as aluminum alloy or iron. The mandrel 30 has a shank 31 and a head 32. The shank 31 is insertable into the hole 23 of the shank 21 of the rivet body 20. The length of the shank 31 is longer than the length of the shank 21 of the rivet body 20. Therefore, when the shank 31 of the mandrel 30 is inserted into the hole 23 of the shank 21 of the rivet body 20, the shank 31 of the mandrel 30 protrudes from the hole 23. The shank 31 has a breaking portion 33 biased toward the head 32. The breaking portion 33 is a portion that breaks when the shank 31 is pulled. The head 32 is formed integrally with the shank 31 at one end of the shank 31. The head 32 is larger than the hole 23 of the shank 21 of the rivet body 20. Therefore, when the shank 31 of the mandrel 30 is inserted into the hole 23 of the shank 21 of the rivet body 20 , the head 32 abuts against one end of the rivet body 20 .

[0011] The washer 40 is a plate made of metal such as aluminum alloy or iron. The washer 40 is formed using, for example, a press die. The washer 40 corresponds to an example of a reinforcing member. The washer 40 in this embodiment is substantially circular. The outer diameter of the washer 40 is set to be larger than the outer diameter of the deformed portion 24 of the rivet body 20 after deformation. The washer 40 also has a hole 41 in approximately the center. The inner diameter of the hole 41 is larger than the outer diameter of the shank 21 of the rivet body 20 and the outer diameter of the head 32 of the mandrel 30. Therefore, the shank 21 of the rivet body 20 can be inserted into the hole 41 of the washer 40.

[0012] The washer 40 also has a raised portion 42 around the hole 41 that is raised in the axial direction of the hole 41 more than the outer periphery. The raised portion 42 is capable of elastic deformation along the axial direction of the hole 41 when an external force is applied. The raised portion 42 is substantially dome-shaped, and begins to rise midway in the radial direction of the washer 40, gradually increasing in height as it approaches the hole 41. In addition, washer 40 has ribs 43. Ribs 43 reinforce the strength of washer 40 itself or raised portion 42. Ribs 43 are provided on raised portion 42 and protrude in the same direction as the raised direction of raised portion 42. In addition, multiple ribs 43 (for example, 4 to 10 ribs) are formed around hole 41, radially from hole 41 as the center.

[0013] Next, the differences between a blind rivet 50 of a comparative example that does not have a washer 40 and the blind rivet 10 of this embodiment that has a washer 40 will be described. Figure 2 is a diagram illustrating the fastening method used to fasten components using a comparative example blind rivet 50. Figure 2 shows the blind rivet 50 before fastening, and a first member 60 and a second member 62 as the components to be fastened together. The blind rivet 50 comprises a rivet body 20 and a mandrel 30.

[0014] The first member 60 is, for example, a flat plate or a partially flat plate, and has a hole 61 formed therein through which the blind rivet 50 is inserted. The second member 62 is, for example, a hollow member such as a pipe, and has a hole 63 formed therein through which the blind rivet 50 is inserted. Here, the second member 62 is a member that has a closed or nearly closed space inside, and the worker performing the fastening cannot access the inside of the second member 62. Therefore, when fastening such a second member 62 while it is superimposed on the first member 60, it is difficult to fasten them using, for example, bolts and nuts that require access to the inside of the second member 62, or using the blind rivet 10 of this embodiment in which the washer 40 is placed from the second member 62 side as described below; instead, it is preferable to fasten them using a blind rivet 50 that does not have a washer 40 and can be fastened only from the first member 60 side.

[0015] 3A to 3D are diagrams illustrating the fastening method used to fasten workpieces with the blind rivet 10 of this embodiment. Figure 3A shows the blind rivet 10 before fastening, and a first member 70 and a second member 72 as the workpieces to be fastened together by overlapping them. The first member 70 is, for example, a flat plate or a partially flat plate, and has a hole 71 formed therein through which the blind rivet 10 is inserted. The second member 72 is, for example, a flat plate or a partially flat plate, and has a hole 73 formed therein through which the blind rivet 10 is inserted. Here, the second member 72 used to fasten the blind rivet 10 of this embodiment is not blocked off, allowing the worker to access the second member 72 side. Specifically, this configuration allows a washer 40 to be placed in the hole 73 of the second member 72 from the second member 72 side. In the configuration of the first member 70 and second member 72 shown in FIG. 3A, it is common to fasten them using inexpensive bolts and nuts, but in this embodiment, a blind rivet 10 equipped with a washer 40 is used for fastening, taking into account advantages such as improved work efficiency and the elimination of the need for torque management.

[0016] Hereinafter, a fastening method for fastening workpieces with the blind rivet 10 of this embodiment will be described with reference to FIGS. 3A to 3D. First, in the first step, as shown in Figure 3A, the rivet body 20 and mandrel 30 of the blind rivet 10 are assembled together. Specifically, the worker inserts the shank 31 of the mandrel 30 into the hole 23 of the rivet body 20 from the opposite side of the flange 22, causing the shank 31 of the mandrel 30 to protrude from the hole 23. At this time, the washer 40 of the blind rivet 10 is left separate and not assembled to the rivet body 20. Note that if the rivet body 20 and mandrel 30 have already been assembled and held together, the first step can be omitted.

[0017] 3B, the assembled rivet body 20 and mandrel 30 are inserted into the hole 71 in the first member 70 and the hole 73 in the second member 72. Specifically, the worker inserts the rivet body 20 from the first member 70 side, with the head 32 of the mandrel 30 leading the way, into the hole 71 in the first member 70 and the hole 73 in the second member 72. The worker inserts the rivet body 20 until the flange 22 of the rivet body 20 abuts against the first member 70.

[0018] In the third step, as shown in FIG. 3B , the shank 21 of the rivet body 20 is inserted into the hole 41 of the washer 40. Specifically, the worker accesses the second member 72 side and slides the washer 40 toward the second member 72 while inserting the shank 21 of the rivet body 20 into the hole 41 of the washer 40. The worker slides the washer 40 until it abuts against the second member 72. The washer 40 is oriented so that the side opposite the raised portion 42 faces the second member 72. Therefore, when the washer 40 abuts against the second member 72, the side opposite the raised portion 42 of the washer 40 faces the second member 72.

[0019] In the fourth step, as shown in Figure 3C, the mandrel 30 alone is pulled in the direction of the arrow while maintaining the positions of the rivet body 20 and washer 40. Specifically, the operator uses a fastening tool to hold the shank 31 of the mandrel 30 and pull it in the direction of the arrow. The force pulling the mandrel 30 acts via the head 32 of the mandrel 30 to deform the deformed portion 24 of the shank 21 of the rivet body 20. Therefore, the deformed portion 24 of the shank 21 of the rivet body 20 expands and deforms, causing it to buckle. The outer shape of the deformed portion 24 gradually increases with each pull on the shank 31 of the mandrel 30. Note that, as shown in Figure 3C, the washer 40 remains approximately in its original shape while the deformed portion 24 is being deformed.

[0020] In the fifth step, as shown in Figure 3D, the mandrel 30 is further pulled in the direction of the arrow. Consequently, the deformed portion 24 of the shank 21 of the rivet body 20 expands further and buckles to its limit, causing the deformed portion 24 to come into contact with the raised portion 42 of the washer 40. Furthermore, as shown in Figure 3D, the first member 70 and the second member 72 are sandwiched between the deformed portion 24 of the shank 21 and the flange 22, thereby fastening the first member 70 and the second member 72 together. In the state shown in Figure 3D, the deformed portion 24 has buckled to its limit, making it impossible to move the head 32 of the mandrel 30 back in the direction of the arrow, and the shank 31 of the mandrel 30 breaks at the breaking portion 33.

[0021] Through the above steps, the blind rivet 10 of this embodiment can be used to fasten the first member 70 and the second member 72. In the second step, the worker may access the second member 72 and place the washer 40 on the second member 72 side in advance so that the hole 41 in the washer 40 communicates with the hole 73 in the second member 72. In this case, the worker inserts the rivet body 20 from the first member 70 side, with the head 32 of the mandrel 30 leading, into the hole 71 in the first member 70 and the hole 73 in the second member 72, and at the same time, the shank 21 of the rivet body 20 is inserted into the hole 41 in the washer 40, so the third step can be omitted.

[0022] Next, the fastening structure in which the first member 70 and the second member 72 are fastened together will be described with reference to Figure 3D. In the fastening structure using the blind rivet 10 of this embodiment, the washer 40 is disposed between the deformed portion 24 of the rivet body 20 and the second member 72, which improves the strength when fastening using the blind rivet 10. The function of the washer 40 will now be described. When fastened using the blind rivet 10, the washer 40 is located between the deformed portion 24 of the rivet body 20 and the second member 72. In this embodiment, as shown in Figure 3D, the outer diameter Dw of the washer 40 is set to be larger than the outer diameter Dd of the deformed portion 24 after deformation. Furthermore, when viewed along the axial direction of the blind rivet 10, the size of the washer 40 is larger than the outer periphery of the deformed portion 24.

[0023] Now, let us consider a case in which an external force is applied to the rivet body 20 of the blind rivet 10, causing it to be pulled outwards towards the first member 70. When an external force is applied to the rivet body 20, the deformed portion 24 of the rivet body 20 presses against the second member 72. In this case, in the blind rivet 10 of this embodiment, the deformed portion 24 does not press against the second member 72 directly, but rather the deformed portion 24 presses against the second member 72 via the washer 40. In this way, by pressing against the second member 72 via the washer 40, the force applied when pressing against the second member 72 is dispersed over the wide area of ​​the washer 40. This makes it possible to prevent deformation such as the washer 40 sinking into the second member 72 or the washer 40 widening the hole 73 in the second member 72, improving the fastening strength of the blind rivet 10. As such, the blind rivet 10 of this embodiment has a washer 40 that is placed between the deformed portion 24 of the rivet body 20 and the second member 72, which suppresses deformation of the fastened members such as the second member 72, thereby improving the fastening strength of the blind rivet 10.

[0024] Furthermore, when the washer 40 is fastened using the blind rivet 10, it is sandwiched between the deformed portion 24 of the rivet body 20 and the second member 72, and the raised portion 42 of the washer 40 elastically deforms on the side opposite to the raised side. In the example shown in Figure 3D, the raised portion 42 of the washer 40 has deformed until it is flattened. When the raised portion 42 of the washer 40 is in an elastically deformed state, the raised portion 42 biases the deformed portion 24 and the second member 72 in directions that separate them in the axial direction of the blind rivet 10. This eliminates any gap that may occur between the deformed portion 24 and the second member 72. Thus, with the blind rivet 10 of this embodiment, the washer 40 applies pressure so that no gap occurs between the deformed portion 24 and the second member 72, thereby suppressing the occurrence of rattles and other problems in the fastened members, thereby improving the fastening strength of the blind rivet 10.

[0025] Furthermore, washer 40 has multiple ribs 43, which can improve the strength of washer 40 itself. Furthermore, by providing ribs 43, the strength required for washer 40 can be ensured even when washer 40 is formed from a thin material, thereby reducing the manufacturing cost of washer 40. Furthermore, because ribs 43 are provided on raised portion 42 of washer 40, the biasing force of raised portion 42 can be increased when washer 40 is sandwiched between deformed portion 24 of rivet body 20 and second member 72.

[0026] <Second embodiment> Next, a blind rivet 80 according to a second embodiment will be described. The blind rivet 80 of this embodiment has two washers (first washer 40a, second washer 40b), and the other configuration is the same as that of the first embodiment. In this embodiment, the first washer 40a and second washer 40b have the same configuration as the washer 40 of the first embodiment. Note that configurations that are the same as those in the first embodiment are given the same reference numerals and their description will be omitted. Hereinafter, with reference to FIG. 4, a fastening method for fastening workpieces with the blind rivet 80 of this embodiment will be described. First, in the first step, the rivet body 20 and the mandrel 30 of the blind rivet 80 are assembled together. This step is the same as the first step in the first embodiment.

[0027] In the second step, the assembled rivet body 20 and mandrel 30 are inserted into the hole 41 of the first washer 40a. Specifically, the operator inserts the rivet body 20 into the hole 41 of the first washer 40a, with the head 32 of the mandrel 30 positioned first. The first washer 40a is oriented so that the raised portion 42 faces the flange 22. As shown in FIG. 4, the size of the first washer 40a is larger than the outer periphery of the flange 22. Note that if the rivet body 20 and first washer 40a are already assembled and held together, the second step can be omitted.

[0028] In the third step, the rivet body 20 and mandrel 30 are inserted into the hole 71 in the first member 70 and the hole 73 in the second member 72. Specifically, the worker inserts the rivet body 20 from the first member 70 side, with the head 32 of the mandrel 30 leading the way, into the hole 71 in the first member 70 and the hole 73 in the second member 72. The worker inserts the rivet body 20 until the flange 22 of the rivet body 20 abuts against the first washer 40a, and the first washer 40a abuts against the first member 70.

[0029] In the fourth step, the shank 21 of the rivet body 20 is inserted into the hole 41 of the second washer 40b, as shown in Figure 4. This step is the same as the third step in the first embodiment. In the fifth step, only the mandrel 30 is pulled in the direction of the arrow while maintaining the positions of the rivet body 20, the first washer 40a, and the second washer 40b. This step is the same as the fourth step in the first embodiment.

[0030] In the sixth step, the mandrel 30 is further pulled in the direction of the arrow. Consequently, the deformed portion 24 of the shank 21 of the rivet body 20 expands and buckles to its limit, causing the deformed portion 24 to come into contact with the raised portion 42 of the second washer 40b. Since the head 32 of the mandrel 30 cannot be moved back in the direction of the arrow, the shank 31 of the mandrel 30 breaks at the breaking portion 33. At this time, the first washer 40a is sandwiched between the first member 70 and the flange 22, and elastically deforms until the raised portion 42 becomes flat. This step is the same as the fifth step in the first embodiment.

[0031] Through the above steps, the blind rivet 80 of this embodiment can be used to fasten the first member 70 and the second member 72. In a fastening structure using the blind rivet 80 of this embodiment, the first washer 40a is placed between the flange 22 of the rivet body 20 and the first member 70, and the second washer 40b is placed between the deformed portion 24 of the rivet body 20 and the second member 72, which further improves the strength when fastening using the blind rivet 80. In this embodiment, the first washer 40a and the second washer 40b have the same configuration, but the present invention is not limited to this and they may have different configurations.

[0032] <Third embodiment> Next, a blind rivet according to a third embodiment will be described. The blind rivet of this embodiment has a configuration in which the second washer 40b of the two washers of the blind rivet 80 of the second embodiment is omitted. Note that a description of the same configuration as the second embodiment will be omitted. The fastening method for fastening workpieces with the blind rivet of this embodiment will be described below. First, in the first step, the rivet body 20 and the mandrel 30 of the blind rivet are assembled together. This step is the same as the first step in the second embodiment.

[0033] In the second step, the assembled rivet body 20 and mandrel 30 are inserted into the hole 41 of the first washer 40a. This step is similar to the second step in the second embodiment. In the third step, the rivet body 20 and mandrel 30 are inserted into the hole 71 in the first member 70 and the hole 73 in the second member 72. The operator inserts the rivet body 20 until the flange 22 of the rivet body 20 abuts against the first washer 40a, and the first washer 40a abuts against the first member 70. This step is similar to the third step in the second embodiment.

[0034] In the fourth step, while maintaining the positions of the rivet body 20 and the first washer 40a, only the mandrel 30 is pulled. This step is the same as the fifth step in the second embodiment. In the fifth step, the mandrel 30 is pulled further. The deformed portion 24 of the shank 21 of the rivet body 20 expands and buckles to its limit, causing the deformed portion 24 to come into contact with the second member 72. Because the head 32 of the mandrel 30 cannot be retracted, the shank 31 of the mandrel 30 breaks at the breaking portion 33. At this time, the first washer 40a is sandwiched between the first member 70 and the flange 22, and elastically deforms until the raised portion 42 becomes flat. This step is the same as the sixth step in the second embodiment.

[0035] Through the above steps, the blind rivet of this embodiment can be used to fasten the first member 70 and the second member 72. In the fastening structure using the blind rivet of this embodiment, the first washer 40a is disposed between the flange 22 of the rivet body 20 and the first member 70, thereby improving the strength when fastening using the blind rivet.

[0036] <Fourth embodiment> Next, a workbench 100 will be described as an example of a tool that uses fastened parts fastened with the blind rivet 10 of the first embodiment. The workbench 100 is used, for example, when a worker works at height at a work site. Note that the same components as those in the first embodiment will be appropriately assigned the same reference numerals. FIG. 5 is a perspective view showing an example of the workbench 100. As shown in FIG. The workbench 100 includes a top panel 110, an enclosure 120, and main legs 130. The top panel 110 serves as a foothold for a worker when working on the workbench 100. The top panel 110 is a plate-like member, and has a rectangular shape that is longer on the main legs 130 side when viewed from above.

[0037] The enclosure 120 surrounds the worker while he or she is working on the top panel 110 to prevent the worker from falling off the workbench 100. The enclosure 120 has four support columns 121, a pair of long-side bar members 122, and a pair of short-side bar members 123. The four support columns 121 are erected at the four corners of the top panel 110 via support brackets 124. The pair of short-side bar members 123 can be detached from the support columns 121 to allow the worker to move between the main landing gear 130 and the top panel 110.

[0038] The main legs 130 support the top panel 110 in a horizontal position. The main legs 130 include a first main leg 131 and a second main leg 132. The first main leg 131 and the second main leg 132 are each ladder-shaped and are arranged so that the distance between them increases as they move from the top panel 110 toward the floor surface. The first main leg 131 and the second main leg 132 have the same configuration, and only the first main leg 131 will be described here. The first main leg 131 includes a leg portion 133 a , a leg portion 133 b , a crosspiece member 136 , and a crosspiece bracket 137 .

[0039] The legs 133a and 133b are each a member whose upper portion is connected to a corner of the top plate 110 and whose lower portion extends in a substantially vertical direction to the floor surface. The legs 133a and 133b are arranged so that the distance between them increases as they move from the top plate 110 to the floor surface. The legs 133a and 133b are made of a metal such as an aluminum alloy and are formed by, for example, extrusion molding. The legs 133a and 133b have a substantially U-shaped cross section (substantially C-shaped). The legs 133a and 133b are arranged so that openings 135, which will be described later, face each other.

[0040] Crosspiece member 136 is bridged between leg portion 133a and leg portion 133b. Crosspiece member 136 serves as a step when an operator ascends and descends to top board 110. Crosspiece member 136 is made of metal such as aluminum alloy, and is formed by extrusion molding, for example. Crosspiece member 136 is hollow. Crosspiece member 136 is fixed to leg portion 133a and leg portion 133b via crosspiece brackets 137, spaced apart from each other in the vertical direction, to make it easier for an operator to ascend and descend. The crosspiece bracket 137 is a member for fixing the crosspiece member 136 to the leg portions 133a and 133b. The crosspiece bracket 137 is made of a metal such as an aluminum alloy or steel. The crosspiece bracket 137 is generally flat. The crosspiece bracket 137 is fastened to the leg portion 133a or the leg portion 133b using the blind rivet 10 described above.

[0041] 6 is a cross-sectional view taken along line II shown in FIG. 5 and seen from the direction of the arrow. As described above, the leg portion 133a has a substantially U-shaped cross section (substantially C-shaped), and has a pair of side plate portions 134. The leg portion 133a also has an opening 135 between the pair of side plate portions 134. Crosspiece brackets 137 are arranged on the outer sides of the pair of side plate portions 134 of the leg portion 133a so as to overlap each other. Here, the crosspiece bracket 137 corresponds to the first member 70 of the first embodiment, and is provided with a hole 71. The side plate portion 134 (leg portion 133a) corresponds to the second member 72 of the first embodiment, and is provided with a hole 73.

[0042] As shown in Figure 6, the crosspiece bracket 137 and side plate portion 134 are fastened together using a blind rivet 10. The washer 40 of the blind rivet 10 is positioned between the deformed portion 24 of the rivet body 20 and the side plate portion 134. In other words, when fastening using the blind rivet 10, the worker can access the inside of the side plate portion 134 through the opening 135 and can insert the shank 21 of the rivet body 20 into the hole in the washer 40. In this way, by fastening the crosspiece bracket 137 to the leg portion 133a using the blind rivet 10, the fastening strength can be improved because the washer 40 is disposed between the deformed portion 24 of the rivet body 20 and the side plate portion 134. Therefore, the crosspiece member 136 is fixed by the crosspiece bracket 137 fastened to the leg portion 133a, and the strength of the crosspiece member 136 can be improved.

[0043] Just as when the crosspiece bracket 137 and the leg 133a are fastened together using the blind rivet 10, the crosspiece bracket 137 and the leg 133b are also fastened together using the blind rivet 10. The support bracket 124 is also fastened together with the leg 133a or the leg 133b using the blind rivet 10. Furthermore, in this embodiment, the case where the crosspiece member 136 is a hollow member has been described, but if the crosspiece member 136 is not hollow but has a shape that allows access to the inside, such as a generally U-shaped cross section, the crosspiece bracket 137 and the crosspiece member 136 may be fastened together using the blind rivet 10. From the standpoint of strength, the legs 133a, 133b that are arranged in a generally vertical direction can be shaped to make it easier to access the inside than the crosspiece member 136 that is arranged in a generally horizontal direction, and therefore it is preferable to use the blind rivet 10 when fastening members that are arranged in a generally vertical direction.

[0044] Furthermore, in this embodiment, the case where the blind rivet 10 of the first embodiment is used has been described, but this is not limiting, and fastening may also be performed using the blind rivet 80 of the second or third embodiment. In this way, the strength of the workbench 100 using fastened parts fastened with the blind rivets 10, 80 of the first to third embodiments can be improved. Note that the present invention may also be applied to other devices other than the workbench 100, such as transport carts.

[0045] The present invention has been described above using the above-mentioned embodiments, but the present invention is not limited to only the above-mentioned embodiments, and modifications and the like are possible within the scope of the present invention, and the respective embodiments may be combined. In this embodiment, a blind rivet 10 of a type in which the head 32 of the mandrel 30 abuts against the end of the rivet body 20 has been described, but this is not limited to this case. For example, the present invention may be applied to a blind rivet of a type in which the head 32 of the mandrel 30 is pre-inserted into the hole in the rivet body 20, and the head 32 of the mandrel 30 is not exposed from the outside.

[0046] Furthermore, in this embodiment, when the blind rivet 10, 80 is viewed along the axial direction, the size of the washer 40 (first washer 40a, second washer 40b) is described as being larger than the outer periphery of the deformed portion 24, but this is not limited to this case, and it is sufficient that at least a portion of the washer 40 is located outside the outer periphery of the deformed portion 24. Furthermore, in this embodiment, the size of the first washer 40a is described as being larger than the outer periphery of the flange 22 when the blind rivet 80 is viewed along the axial direction, but this is not limited to this case, and it is sufficient that at least a portion of the first washer 40a is located outside the outer periphery of the flange 22.

[0047] Furthermore, in this embodiment, the washer 40 (first washer 40a, second washer 40b) is described as being substantially circular, but this is not limiting, and any shape that can abut against the fastened member may be used, such as a triangle, a rectangle (including a parallelogram, a trapezoid, etc.), or a polygon with pentagons or more sides. Note that substantially circular shapes include, for example, an ellipse, an oval, and a polygon that approximates a circle. In addition, in this embodiment, the washer 40 (first washer 40a, second washer 40b) has been described as having a circular hole 41, but this is not limited to this case, and the hole may be non-circular or may be a notched hole that extends partially to the outer periphery of the washer 40. Furthermore, in this embodiment, the case where the first member 70 and the second member 72 are fastened together has been described, but the present invention is not limited to this case, and one member or three or more members may be fastened together. [Explanation of symbols]

[0048] 10: blind rivet 20: rivet body 21: shank 22: flange 30: mandrel 31: shank 32: head 33: breaking portion 40: washer (reinforcing member) 40a: first washer (reinforcing member) 40b: second washer (reinforcing member) 41: hole 42: raised portion 43: rib 70: first member (fastened member) 71: hole 72: second member (fastened member) 73: hole 80: blind rivet 100: work table 133a, 133b: legs 136: crosspiece member 137: crosspiece bracket

Claims

[Claim 1] A fastener for fastening workpieces, a hollow rivet body having a flange and inserted into a hole in the workpiece; a mandrel inserted into the rivet body; a reinforcing member disposed between the deformed portion of the rivet body and the fastened workpiece and / or between the flange and the fastened workpiece.

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