JP7385887B2 - Workbench - Google Patents

Description

The present invention relates to a workbench .

Blind rivets are conventionally known as fasteners. Patent Document 1 discloses a hollow rivet body having a shaft portion and a flange at one end of the shaft portion, an outer diameter that can be inserted into the hollow hole of the rivet body, a shaft portion longer than the rivet body, and a flange at one end of the shaft portion. A blind rivet is disclosed comprising: a mandrel having a head; To fasten parts to be fastened using such a blind rivet, first attach the shaft of the mandrel to the shaft of the rivet body so that the mandrel head is located at the end of the shaft opposite to the flange of the rivet body. Let it be inserted. Next, the rivet body is inserted into the mounting hole of the member to be fastened until the flange is in contact with the mounting hole, with the mandrel head at the beginning. Next, by pulling the mandrel shaft from the flange side with the rivet main body inserted, the shaft of the rivet main body expands and buckles, and the mandrel shaft breaks and the fastened members are fastened. By using blind rivets, the members to be fastened can be fastened from one side.

Japanese Unexamined Patent Publication No. 171910/1983

Blind rivets are limited in size because it is difficult to increase the shape of the rivet body after the shaft is expanded and buckled, that is, the shape of the rivet body after the shaft is deformed. If the shape of the rivet body's shaft after deformation is small, the shaft of the rivet body may sink into the fastened member or slip out of the fastened member's mounting hole when an external force is applied along the axial direction. Therefore, there is a problem that the strength of the fastening is reduced. On the other hand, in order to increase the shape of the rivet body shaft after deformation, it is necessary to make the rivet body shaft a material that easily deforms or to reduce the thickness of the shaft. The strength of the entire blind rivet decreases.
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to improve the strength of fastening when fastening using a fastener.

The workbench of the present invention is a workbench that has main legs that support a top plate in a horizontal state, and the main legs include a pair of legs that are each internally accessible, and a pair of legs that rest on the pair of legs. A crosspiece member to be passed, a first crosspiece bracket that fixes the crosspiece member to the leg, and the first crosspiece bracket is attached to one of a pair of opposing side plate parts provided on the leg. and a fastener for fastening, the fastener being inserted into the hole of the one side plate part and the first crosspiece bracket, and a hollow rivet body having a flange, and the fastener being inserted into the rivet body. a reinforcing member disposed between the deformed portion of the rivet main body and the one side plate portion;
The reinforcing member has a hole into which the rivet main body is inserted, and a raised portion around the hole of the reinforcing member that is raised in the axial direction of the hole of the reinforcing member, and the raised portion begins to bulge midway in the radial direction of the reinforcing member and gradually increases in height as it goes toward the hole in the reinforcing member, and when the hole in the one side plate portion is viewed from the axial direction, the raised portion The starting point at which the deformed portion starts to bulge is located outside the outer periphery of the deformed portion after deformation.

According to the present invention, the strength of fastening can be improved when fastening using a fastener.

It is a figure showing an example of the composition of the blind rivet of a 1st embodiment. It is a figure which shows an example of the to-be-fastened member fastened with the blind rivet of a comparative example. It is a figure for explaining an example of the fastening method of the blind rivet of a 1st embodiment. It is a figure for explaining an example of the fastening method of the blind rivet of a 1st embodiment. It is a figure for explaining an example of the fastening method of the blind rivet of a 1st embodiment. It is a figure for explaining an example of the fastening method of the blind rivet of a 1st embodiment. It is a figure for explaining an example of the fastening method of the blind rivet of a 2nd embodiment. It is a perspective view showing an example of a workbench of a 4th embodiment. It is a sectional view showing a part of a workbench.

Hereinafter, a blind rivet as a fastener according to this embodiment will be explained 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 includes a rivet body 20, a mandrel 30, and a washer 40.

The rivet body 20 has a hollow cylindrical shape and is made of metal such as aluminum alloy or iron. The rivet main body 20 has a shaft portion 21 and a flange 22. The shaft portion 21 has a hole 23 inside thereof extending in the axial direction. Further, the approximate center of the shaft portion 21 functions as a deformable portion 24 that expands and buckles when fastening members to be fastened. The flange 22 is formed integrally with the shaft portion 21 at the other end of the shaft portion 21 .

The mandrel 30 has a shaft shape made of metal such as aluminum alloy or iron. The mandrel 30 has a shaft portion 31 and a head portion 32. The shaft portion 31 can be inserted into the hole 23 of the shaft portion 21 of the rivet body 20. Further, the length of the shaft portion 31 is longer than the length of the shaft portion 21 of the rivet main body 20. Therefore, when the shaft portion 31 of the mandrel 30 is inserted into the hole 23 of the shaft portion 21 of the rivet body 20, the shaft portion 31 of the mandrel 30 protrudes from the hole 23. Further, the shaft portion 31 has a broken portion 33 at a position biased toward the head 32 side. The breaking portion 33 is a portion that breaks when the shaft portion 31 is pulled. The head 32 is formed integrally with the shaft 31 at one end of the shaft 31 . The head 32 is larger than the hole 23 of the shaft 21 of the rivet body 20. Therefore, when the shaft portion 31 of the mandrel 30 is inserted into the hole 23 of the shaft portion 21 of the rivet body 20, the head 32 comes into contact with one end of the rivet body 20.

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 mold. Washer 40 corresponds to an example of a reinforcing member.
The washer 40 of this embodiment has a substantially circular shape. The outer diameter of the washer 40 is set to be larger than the outer diameter of the deformed portion 24 of the rivet main body 20 after deformation. Further, the washer 40 has a hole 41 approximately in the center. The inner diameter of the hole 41 is larger than the outer diameter of the shaft portion 21 of the rivet body 20 and the outer diameter of the head 32 of the mandrel 30. Therefore, the shaft portion 21 of the rivet body 20 can be inserted into the hole 41 of the washer 40.

Further, the washer 40 has a protrusion 42 around the hole 41 that is more protruding in the axial direction of the hole 41 than the outer circumference. The raised portion 42 can be elastically deformed along the axial direction of the hole 41 by applying an external force. Here, the raised portion 42 has a substantially dome shape, and begins to rise midway in the radial direction of the washer 40 and gradually increases in height as it goes toward the hole 41.
Further, the washer 40 has a rib 43. The ribs 43 reinforce the strength of the washer 40 itself or the raised portion 42. The rib 43 is provided on the raised part 42 and protrudes in the same direction as the raised part 42. Further, a plurality of ribs 43 (for example, 4 to 10 ribs) are formed around the hole 41 and radially around the hole 41.

Next, the difference between the blind rivet 50 of the comparative example that does not include the washer 40 and the blind rivet 10 of the present embodiment that includes the washer 40 will be explained.
FIG. 2 is a diagram for explaining a fastening method when fastening members to be fastened using a blind rivet 50 of a comparative example. FIG. 2 shows the blind rivet 50 before fastening, and a first member 60 and a second member 62 as members to be fastened together.
The blind rivet 50 includes a rivet body 20 and a mandrel 30.

The first member 60 is, for example, a flat plate or partially flat, and has a hole 61 into which the blind rivet 50 is inserted. The second member 62 is a hollow member such as a pipe, and has a hole 63 into which the blind rivet 50 is inserted. Here, the second member 62 is a closed space or a substantially closed space, and is a member in which the fastening operator cannot access the inside of the second member 62. Therefore, when fastening the second member 62 in a superimposed state on the first member 60, for example, fastening using bolts and nuts that require access to the inside of the second member 62, and the following will be described later. It is difficult to fasten using the blind rivet 10 of this embodiment in which the washer 40 is arranged from the second member 62 side as shown in FIG. It is preferable.

On the other hand, FIGS. 3A to 3D are diagrams for explaining a fastening method when fastening members to be fastened using the blind rivet 10 of this embodiment. FIG. 3A shows the blind rivet 10 before fastening, and a first member 70 and a second member 72 as members to be fastened together.
The first member 70 is, for example, a flat plate or partially flat, and has a hole 71 into which the blind rivet 10 is inserted. The second member 72 is, for example, a flat plate or partially flat, and has a hole 73 into which the blind rivet 10 is inserted. Here, the second member 72 for fastening the blind rivet 10 of this embodiment is not closed, and the structure is such that the operator can access the second member 72 side. Specifically, the configuration is such that the washer 40 can be placed in the hole 73 of the second member 72 from the second member 72 side. The configuration of the first member 70 and the second member 72 shown in FIG. 3A is generally fastened using inexpensive bolts and nuts, but in this embodiment, work efficiency is improved and torque management is not required. Considering the advantages, the blind rivet 10 equipped with the washer 40 is used for fastening.

Hereinafter, a fastening method for fastening members to be fastened using the blind rivet 10 of this embodiment will be described with reference to FIGS. 3A to 3D.
First, as a first step, as shown in FIG. 3A, the rivet main body 20 and the mandrel 30 of the blind rivet 10 are assembled. Specifically, the operator inserts the shaft portion 31 of the mandrel 30 into the hole 23 of the rivet body 20 from the opposite side of the flange 22, and causes the shaft portion 31 of the mandrel 30 to protrude from the hole 23. At this time, the washer 40 of the blind rivet 10 is not assembled to the rivet main body 20 and is kept separated. Note that if the rivet main body 20 and the mandrel 30 are assembled and held in advance, the first step can be omitted.

As a second step, as shown in FIG. 3B, the assembled rivet main body 20 and mandrel 30 are inserted into the hole 71 of the first member 70 and the hole 73 of the second member 72. Specifically, the operator inserts the rivet body 20 into the hole 71 of the first member 70 and the hole 73 of the second member 72 from the first member 70 side, with the head 32 of the mandrel 30 at the top. The operator inserts the rivet body 20 until the flange 22 of the rivet body 20 comes into contact with the first member 70 .

As a third step, as shown in FIG. 3B, the shaft portion 21 of the rivet body 20 is inserted into the hole 41 of the washer 40. Specifically, the operator accesses the second member 72 side and slides the washer 40 toward the second member 72 while inserting the shaft portion 21 of the rivet body 20 into the hole 41 of the washer 40 . The operator slides the washer 40 until it abuts the second member 72. Note that the washer 40 is oriented such that the opposite side of the raised portion 42 and the second member 72 face each other. Therefore, when the washer 40 abuts the second member 72, the opposite side of the raised portion 42 of the washer 40 and the second member 72 face each other.

As a fourth step, as shown in FIG. 3C, only the mandrel 30 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 shaft portion 31 of the mandrel 30 and pull it in the direction of the arrow. Here, the force that pulls the mandrel 30 becomes a force that deforms the deformable portion 24 of the shaft portion 21 of the rivet body 20 via the head 32 of the mandrel 30. Therefore, the deformable portion 24 of the shaft portion 21 of the rivet body 20 expands and deforms to buckle. Each time the shaft portion 31 of the mandrel 30 is pulled, the outer shape of the deformed portion 24 gradually becomes larger. Note that, as shown in FIG. 3C, during the deformation of the deformable portion 24, the washer 40 remains substantially in its original shape.

As a fifth step, the mandrel 30 is further pulled in the direction of the arrow, as shown in FIG. 3D. Therefore, the deformed portion 24 of the shaft portion 21 of the rivet body 20 further expands and buckles to its limit, so that the deformed portion 24 comes into contact with the raised portion 42 of the washer 40 . Further, as shown in FIG. 3D, the first member 70 and the second member 72 are sandwiched between the deformed portion 24 of the shaft portion 21 and the flange 22, so that the first member 70 and the second member 72 are sandwiched between the first member 70 and the second member 72. is concluded. In the state shown in FIG. 3D, the deformable portion 24 is buckled to the limit and the head 32 of the mandrel 30 cannot be moved back in the direction of the arrow, so the shaft portion 31 of the mandrel 30 breaks from the breaking portion 33.

Through the above steps, the first member 70 and the second member 72 can be fastened using the blind rivet 10 of this embodiment. Note that in the second step, the operator accesses the second member 72 side and places the washer 40 on the second member 72 side in advance so that the hole 41 of the washer 40 and the hole 73 of the second member 72 communicate with each other. It may be placed in In this case, the operator inserts the rivet body 20 into the hole 71 of the first member 70 and the hole 73 of the second member 72 from the first member 70 side, with the head 32 of the mandrel 30 at the top, and at the same time, Since the shaft portion 21 of the rivet body 20 is inserted into the hole 41 of the washer 40, the third step can be omitted.

Next, a fastening structure in which the first member 70 and the second member 72 are fastened will be described with reference to FIG. 3D. In the fastening structure using the blind rivet 10 of this embodiment, since the washer 40 is disposed between the deformed part 24 of the rivet main body 20 and the second member 72, when fastening using the blind rivet 10, Strength can be improved.
The function of the washer 40 will be explained below.
The washer 40 fastened using the blind rivet 10 is located between the deformed portion 24 of the rivet body 20 and the second member 72. In this embodiment, as shown in FIG. 3D, the outer diameter dimension Dw of the washer 40 is set to be larger than the outer diameter dimension 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 deformable portion 24.

Here, it is assumed that an external force is applied to the rivet main body 20 of the blind rivet 10 toward the outside on the first member 70 side to cause it to be pulled out. When an external pulling force is applied to the rivet body 20, the deformed portion 24 of the rivet body 20 presses against the second member 72. At this time, in the blind rivet 10 of the present embodiment, the deformable portion 24 does not press the second member 72 directly, but the deformable portion 24 presses the second member 72 via the washer 40. In this way, by pressing the second member 72 through the washer 40, the force when pressing the second member 72 is dispersed due to the large area of the washer 40. Therefore, deformation such as the washer 40 sinking into the second member 72 or the washer 40 expanding the hole 73 of the second member 72 can be prevented, and the strength of fastening the blind rivet 10 can be improved. can.
As described above, according to the blind rivet 10 of the present embodiment, since the washer 40 is disposed between the deformed portion 24 of the rivet main body 20 and the second member 72, the second member 72 and other fastened members Since the deformation of the blind rivet 10 is suppressed, the fastening strength of the blind rivet 10 can be improved.

Further, when the washer 40 is fastened using the blind rivet 10, the washer 40 is held between the deformed part 24 of the rivet main body 20 and the second member 72, and the washer 40 is held on the side opposite to the raised part 42 of the washer 40. It deforms elastically. In the example shown in FIG. 3D, the raised portion 42 of the washer 40 is deformed until it becomes flat. In the state where the raised portion 42 of the washer 40 is elastically deformed, the raised portion 42 urges the deformed portion 24 and the second member 72 in a direction to separate them in the axial direction of the blind rivet 10. Therefore, a gap that may occur between the deformable portion 24 and the second member 72 can be eliminated.
As described above, according to the blind rivet 10 of the present embodiment, the washer 40 biases the deformed portion 24 and the second member 72 so that no gap is generated, so that the looseness etc. that occurs in the fastened member can be prevented. Since this occurrence is suppressed, the strength of fastening the blind rivet 10 can be improved.

Further, since the washer 40 has a plurality of ribs 43, the strength of the washer 40 itself can be improved. Further, by having the ribs 43, the strength required for the washer 40 can be ensured even if the washer 40 is formed of a thin material, so that the manufacturing cost of the washer 40 can be reduced. Moreover, since the rib 43 is provided on the raised part 42 of the washer 40, the urging force by the raised part 42 when the washer 40 is held between the deformed part 24 of the rivet main body 20 and the second member 72 can be increased.

<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 (a first washer 40a, a second washer 40b), and the other configurations are the same as those of the first embodiment. In this embodiment, the first washer 40a and the second washer 40b have the same configuration as the washer 40 of the first embodiment. Note that configurations similar to those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
Hereinafter, with reference to FIG. 4, a fastening method for fastening members to be fastened using the blind rivet 80 of this embodiment will be described.
First, as a first step, the rivet main body 20 and the mandrel 30 of the blind rivet 80 are assembled. This step is similar to the first step of the first embodiment.

As a 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 at the top. Here, the first washer 40a is oriented such that the raised portion 42 and the flange 22 face each other. As shown in FIG. 4, the size of the first washer 40a is larger than the outer circumference of the flange 22. Note that if the rivet main body 20 and the first washer 40a are assembled and held in advance, the second step can be omitted.

As a third step, the rivet body 20 and the mandrel 30 are inserted into the hole 71 of the first member 70 and the hole 73 of the second member 72. Specifically, the operator inserts the rivet body 20 into the hole 71 of the first member 70 and the hole 73 of the second member 72 from the first member 70 side, with the head 32 of the mandrel 30 at the top. The operator inserts the rivet body 20 until the flange 22 of the rivet body 20 contacts the first washer 40a and the first washer 40a contacts the first member 70.

As a fourth step, as shown in FIG. 4, the shaft portion 21 of the rivet body 20 is inserted into the hole 41 of the second washer 40b. This step is similar to the third step of the first embodiment.
As a 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 similar to the fourth step of the first embodiment.

As a sixth step, the mandrel 30 is further pulled in the direction of the arrow. Therefore, the deformed portion 24 of the shaft portion 21 of the rivet body 20 expands and buckles to its limit, so that the deformed portion 24 comes into contact with the raised portion 42 of the second washer 40b. Since the head 32 of the mandrel 30 cannot be moved backward in the direction of the arrow, the shaft portion 31 of the mandrel 30 is broken at the breaking portion 33 . At this time, the first washer 40a is held between the first member 70 and the flange 22, and is elastically deformed until the raised portion 42 becomes flat. This step is similar to the fifth step of the first embodiment.

Through the above steps, the first member 70 and the second member 72 can be fastened using the blind rivet 80 of this embodiment. In the fastening structure using the blind rivet 80 of this embodiment, the first washer 40a is arranged between the flange 22 of the rivet main body 20 and the first member 70, and the deformed portion 24 of the rivet main body 20 and the second member 70 Since the second washer 40b is disposed between the two, the strength when fastening using the blind rivet 80 can be further improved.
In addition, although this embodiment demonstrated the case where the 1st washer 40a and the 2nd washer 40b had the same structure, it is not restricted to this case, and may be a different structure.

<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 descriptions of configurations similar to those in the second embodiment will be omitted.
Hereinafter, a fastening method for fastening members to be fastened using the blind rivet of this embodiment will be described.
First, as a first step, the rivet main body 20 and the mandrel 30 of the blind rivet are assembled. This step is similar to the first step of the second embodiment.

As a 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 of the second embodiment.
As a third step, the rivet body 20 and the mandrel 30 are inserted into the hole 71 of the first member 70 and the hole 73 of the second member 72. The operator inserts the rivet body 20 until the flange 22 of the rivet body 20 contacts the first washer 40a and the first washer 40a contacts the first member 70. This step is similar to the third step of the second embodiment.

As a fourth step, only the mandrel 30 is pulled while maintaining the positions of the rivet body 20 and the first washer 40a. This step is similar to the fifth step of the second embodiment.
As a fifth step, the mandrel 30 is pulled further. The deformed portion 24 of the shaft portion 21 of the rivet body 20 expands and buckles to its limit, so that the deformed portion 24 comes into contact with the second member 72 . Since the head 32 of the mandrel 30 cannot be retracted, the shaft portion 31 of the mandrel 30 breaks from the breakage portion 33 . At this time, the first washer 40a is held between the first member 70 and the flange 22, and is elastically deformed until the raised portion 42 becomes flat. This step is similar to the sixth step of the second embodiment.

Through the above steps, the first member 70 and the second member 72 can be fastened using the blind rivet of this embodiment. In the fastening structure using blind rivets of this embodiment, since the first washer 40a is disposed between the flange 22 of the rivet main body 20 and the first member 70, when fastening using blind rivets, Strength can be improved.

<Fourth embodiment>
Next, a workbench 100 will be described as an example of an instrument using fastened members fastened by the blind rivet 10 of the first embodiment. The workbench 100 is used, for example, when a worker works at a height at a work site. Note that configurations similar to those in the first embodiment are designated by the same reference numerals as appropriate.
FIG. 5 is a perspective view showing an example of the workbench 100.
The workbench 100 includes a top plate 110, an enclosure 120, and main legs 130. The top plate 110 serves as a foothold when an operator works on the workbench 100. The top plate 110 is a plate-like member, and has a rectangular shape that is long toward the main leg 130 when viewed from above.

The enclosure portion 120 surrounds the worker to prevent the worker from falling off the workbench 100 while the worker is working on the top plate 110. The enclosure portion 120 has four support columns 121 , a pair of longitudinal bar members 122 , and a pair of short bar members 123 . The four columns 121 are erected at the four corners of the top plate 110 via column brackets 124, respectively. Note that by detaching the pair of shorter side bar members 123 from the state where they are connected to the support column 121, the operator can move back and forth between the main leg 130 and the top plate 110.

The main legs 130 support the top plate 110 in a horizontal state. The main landing gear 130 includes a first main landing gear 131 and a second main landing gear 132. The first main leg 131 and the second main leg 132 each have a ladder shape, and are arranged so as to be spaced apart from each other as they go from the top plate 110 toward the floor surface. The first main landing gear 131 and the second main landing gear 132 have the same configuration, and the first main landing gear 131 will be described here.
The first main leg 131 includes a leg portion 133a, a leg portion 133b, a crosspiece member 136, and a crosspiece bracket 137.

Each of the legs 133a and 133b is a member whose upper part is connected to a corner of the top plate 110 and whose lower part extends substantially vertically to the floor surface. The legs 133a and 133b are arranged so that they are spaced apart from each other as they go from the top plate 110 toward the floor surface. The legs 133a and 133b are made of metal such as aluminum alloy, and are formed by extrusion molding, for example. Further, the leg portions 133a and 133b have a substantially U-shaped cross section (substantially C-shaped). Leg portions 133a and leg portions 133b are arranged such that openings 135, which will be described later, face each other.

The crosspiece member 136 is spanned between the leg portions 133a and 133b. The crosspiece member 136 serves as a step on which the worker ascends and descends to the top plate 110. The crosspiece member 136 is made of metal such as aluminum alloy, and is formed by extrusion molding, for example. Moreover, the crosspiece member 136 has a hollow shape. The crosspiece members 136 are fixed to the leg portions 133a and 133b via crosspiece brackets 137 at intervals vertically so that the operator can easily move up and down.
The crosspiece bracket 137 is a member for fixing the crosspiece member 136 to the legs 133a and 133b. The crosspiece bracket 137 is made of metal such as aluminum alloy or steel. Further, the crosspiece bracket 137 has a substantially flat plate shape. The crosspiece bracket 137 is fastened to the leg portion 133a or the leg portion 133b using the blind rivet 10 described above.

FIG. 6 is a cross-sectional view taken along line II shown in FIG. 5 and viewed from the direction of the arrow.
As described above, the leg portion 133a has a substantially U-shaped (substantially C-shaped) cross section, and includes a pair of side plate portions 134. Further, the leg portion 133a has an opening 135 between the pair of side plate portions 134. A crosspiece bracket 137 is arranged on the outer side of the pair of side plate parts 134 of the leg part 133a so as to overlap each other.
Here, the crosspiece bracket 137 corresponds to the first member 70 of the first embodiment, and has a hole 71 formed therein. Further, the side plate portion 134 (leg portion 133a) corresponds to the second member 72 of the first embodiment, and has a hole 73 formed therein.

As shown in FIG. 6, the crosspiece bracket 137 and the side plate portion 134 are fastened using blind rivets 10. The washer 40 of the blind rivet 10 is arranged between the deformed part 24 of the rivet main body 20 and the side plate part 134. That is, when fastening using the blind rivet 10, the operator can access the inside of the side plate part 134 through the opening 135, and can insert the shaft part 21 of the rivet body 20 into the hole of the washer 40.
In this way, by fastening the crosspiece bracket 137 to the leg part 133a using the blind rivet 10, the fastening is possible because the washer 40 is disposed between the deformed part 24 of the rivet main body 20 and the side plate part 134. can improve the strength of Therefore, since the crosspiece member 136 is fixed by the crosspiece bracket 137 fastened to the leg portion 133a, the strength of the crosspiece member 136 can be improved.

In addition, similarly to the case where the crosspiece bracket 137 and the leg part 133a are fastened using the blind rivet 10, the blind rivet 10 is also used to fasten between the crosspiece bracket 137 and the leg part 133b. Further, blind rivets 10 are also used to fasten between the support bracket 124 and the leg portions 133a or 133b.
Further, in this embodiment, the case where the crosspiece member 136 is a hollow member has been described, but if it is not hollow and has a shape that allows access to the inside of the crosspiece member 136, for example, a substantially U-shaped cross section, The crosspiece bracket 137 and the crosspiece member 136 may be fastened using blind rivets 10. In addition, from the viewpoint of strength, the legs 133a and 133b arranged along the substantially vertical direction can be shaped so that they are easier to access inside than the crosspiece member 136 arranged along the substantially horizontal direction. It is preferable to use the blind rivet 10 when fastening to fastened members arranged along the direction.

Further, in this embodiment, a case has been described in which the blind rivet 10 of the first embodiment is used, but the fastening is not limited to this case, and the blind rivet 80 of the second or third embodiment may be used for fastening. .
In this way, the workbench 100 using fastened members fastened by the blind rivets 10 and 80 of the first to third embodiments can have improved strength. Note that the present invention may also be applied to other instruments other than the workbench 100, such as a transport cart.

Although the present invention has been described above using the embodiments described above, the present invention is not limited to the embodiments described above, and modifications can be made within the scope of the present invention, and each embodiment may be combined. good.
In this embodiment, the blind rivet 10 of the type in which the head 32 of the mandrel 30 comes into contact with the end of the rivet main body 20 has been described, but the present invention is not limited to this case. For example, the present invention may be applied to a type of blind rivet in which the head 32 of the mandrel 30 is inserted into the hole of the rivet body 20 in advance, and the head 32 of the mandrel 30 is not exposed in appearance.

Furthermore, in this embodiment, when the blind rivets 10 and 80 are viewed along the axial direction, the size of the washer 40 (first washer 40a, second washer 40b) is larger than the outer circumference of the deformable portion 24. Although the case has been described, the present invention is not limited to this case, and at least a portion of the washer 40 may be located outside the outer periphery of the deformable portion 24.
Furthermore, in the present embodiment, a case has been described in which the size of the first washer 40a is larger than the outer circumference of the flange 22 when the blind rivet 80 is viewed along the axial direction. However, this is not limited to this case. It is sufficient that at least a part of the washer 40a of the first washer 40a is located outside the outer periphery of the flange 22.

Further, in the present embodiment, the case where the washers 40 (first washer 40a, second washer 40b) is approximately circular has been described, but this is not limited to this case, and any shape that can come into contact with the member to be fastened may be used. Often, it may be a triangle, a quadrilateral (including a parallelogram, a trapezoid, etc.), a polygon of pentagon or more, or the like. Note that the term "substantially circular" includes, for example, an ellipse, an ellipse, a polygon approximated to a circle, and the like.
Furthermore, in the present embodiment, a case has been described in which the washer 40 (first washer 40a, second washer 40b) has a circular hole 41, but the case is not limited to this case. It may be a cutout hole extending to the outer periphery of 40.
Further, in the present embodiment, the case where the first member 70 and the second member 72 are fastened has been described, but the case is not limited to this, and it is also possible to fasten one member or three or more members. .

10: Blind rivet 20: Rivet body 21: Shaft 22: Flange 30: Mandrel 31: Shaft 32: Head 33: Broken portion 40: Washer (reinforcing member) 40a: First washer (reinforcing member) 40b: No. No. 2 washer (reinforcing member) 41: hole 42: raised portion 43: rib 70: first member (member to be fastened) 71: hole 72: second member (member to be fastened) 73: hole 80: blind rivet 100: work Stand 133a, 133b: Legs 136: Crosspiece member 137: Crosspiece bracket

Claims (6)

A workbench having main legs that support a top plate in a horizontal state,
The main leg includes a pair of legs that are each internally accessible, a crosspiece member that spans the pair of leg parts, a first crosspiece bracket that fixes the crosspiece member to the leg parts, and the first crosspiece bracket. a fastener for fastening the crosspiece bracket to one of a pair of opposing side plate parts provided on the leg part,
The fastener is
a hollow rivet body that is inserted into a hole of the one side plate portion and the first crosspiece bracket and has a flange;
a mandrel inserted into the rivet body;
a reinforcing member disposed between the deformed part of the rivet main body and the one side plate part,
The reinforcing member is
a hole into which the rivet body is inserted;
The periphery of the hole of the reinforcing member has a raised portion that rises in the axial direction of the hole of the reinforcing member,
The raised portion is
The height starts to rise midway in the radial direction of the reinforcing member and gradually increases in height as it goes toward the hole of the reinforcing member,
When the hole in the one side plate portion is viewed from the axial direction,
A workbench characterized in that a starting point at which the raised portion starts to rise is outside an outer periphery of the deformed portion after it has been deformed. A workbench having main legs that support a top plate in a horizontal state,
The main leg includes a pair of legs, a crosspiece member that spans the pair of leg parts and is internally accessible, a first crosspiece bracket that fixes the crosspiece member to the legs, and a first crosspiece bracket that fixes the crosspiece member to the legs. a fastener for fastening the crosspiece bracket to one of a pair of opposing side plate portions provided on the crosspiece member,
The fastener is
a hollow rivet body that is inserted into a hole of the one side plate portion and the first crosspiece bracket and has a flange;
a mandrel inserted into the rivet body;
a reinforcing member disposed between the deformed part of the rivet main body and the one side plate part,
The reinforcing member is
a hole into which the rivet body is inserted;
The periphery of the hole of the reinforcing member has a raised portion that rises in the axial direction of the hole of the reinforcing member,
The raised portion is
The height starts to rise midway in the radial direction of the reinforcing member and gradually increases in height as it goes toward the hole of the reinforcing member,
When the hole in the one side plate portion is viewed from the axial direction,
A workbench characterized in that a starting point at which the raised portion starts to rise is outside an outer periphery of the deformed portion after it has been deformed. The workbench according to claim 1 or 2, wherein the reinforcing member has a plurality of ribs around the hole of the reinforcing member. If the reinforcing member is a first reinforcing member,
a second reinforcing member disposed between the flange and the first crosspiece bracket;
4. The workbench according to claim 1, wherein the first reinforcing member and the second reinforcing member have the same configuration. When the hole in the one side plate portion is viewed from the axial direction,
The workbench according to claim 4, wherein at least a portion of the second reinforcing member is larger than an outer circumference of the flange. If the fastener is a first fastener,
The main leg further includes a second crosspiece bracket for fixing the crosspiece member to the leg part, and a second crosspiece bracket for fastening the second crosspiece bracket to the other side plate part of the pair of side plate parts. and a fastener;
6. The workbench according to claim 1, wherein the second fastener and the first fastener have the same configuration.

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