Cylindrical member assembling device and cylindrical member assembling method

Abstract

To provide a cylindrical member assembling device that can assemble a cylindrical member made of an elastic body into another cylindrical member easily and efficiently.SOLUTION: A control part 40 controls a cylindrical moving part 20 so that the cylindrical moving part moves a first cylindrical member 70 and therefore one end part 701 of the first cylindrical member 70 separates from one end part 801 of a second cylindrical member 80 by a predetermined distance. The control part 40 controls a gas supply part 30 so that the gas supply part supplies gas into the first cylindrical member 70 to enlarge the one end part 701 of the first cylindrical member 70 toward outside in a radial direction. The control part 40 controls the cylindrical moving part 20 so that the cylindrical material moving part moves the first cylindrical member 70 in an axial direction and therefore the one end part 701 of the first cylindrical member 70 is positioned outside in the radial direction of the one end part 801 of the second cylindrical member 80, which can assemble the first cylindrical member 70 into the second cylindrical member 80.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cylindrical member assembling device and a cylindrical member assembling method.

Background Art

[0002] Conventionally, an apparatus and a method for inserting a rod-shaped shaft into a cylindrical member made of an elastic body such as rubber have been known. For example, in the apparatus and method of Patent Document 1, the shaft is inserted while sending air inside the cylindrical member, thereby facilitating the insertion of the shaft into the cylindrical member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 discloses a method in which the tip of the shaft is slightly inserted into the cylindrical member by hand, then the shaft is inserted into the apparatus in a state where the shaft is arranged vertically above the cylindrical member, air is sent inside the cylindrical member, and the shaft is pushed into the cylindrical member by hand. Patent Document 1 also discloses a method in which only the cylindrical member is inserted into the apparatus, and then the shaft is press-fitted from vertically above the cylindrical member in a state where air is sent into the cylindrical member.

[0005] However, when the thickness of the end portion of the cylindrical member on the shaft insertion side is smaller than that of other portions in the axial direction, when the tip of the shaft is inserted or press-fitted into the cylindrical member, the end portion of the cylindrical member may be deformed so as to be caught by the end portion of the shaft, making it difficult to insert the shaft, that is, to assemble the cylindrical member and the shaft. Further, in the method of Patent Document 1, since the shaft is inserted or press-fitted into the cylindrical member manually, the working efficiency of assembly may decrease.

[0006] An object of the present invention is to provide a cylindrical member assembling device and a cylindrical member assembling method capable of easily and efficiently assembling a cylindrical member made of an elastic body to another cylindrical member.

Means for Solving the Problems

[0007] A first aspect of the present invention is a cylindrical member assembling device for assembling a first cylindrical member made of an elastic body to a second cylindrical member, comprising a cylindrical member moving part, a gas supply part, and a control part. The cylindrical member moving part can change the axial relative position between the first cylindrical member and the second cylindrical member by moving the first cylindrical member in the axial direction. The gas supply part can supply gas inside the first cylindrical member. The control part can control the operations of the cylindrical member moving part and the gas supply part. One end of the first cylindrical member has a smaller wall thickness than other parts in the axial direction.

[0008] The control part controls the cylindrical member moving part and moves the first cylindrical member so that the distance between one end of the first cylindrical member and one end of the second cylindrical member becomes a predetermined distance. The control part controls the gas supply part and expands one end of the first cylindrical member radially outward by supplying gas inside the first cylindrical member. The control part controls the cylindrical member moving part and moves the first cylindrical member in the axial direction so that one end of the first cylindrical member is located radially outside one end of the second cylindrical member, and assembles the first cylindrical member to the second cylindrical member.

[0009] In this aspect, the control part controls the gas supply part and the cylindrical member moving part, expands one end of the first cylindrical member radially outward, and then moves the first cylindrical member in the axial direction to assemble the first cylindrical member to the second cylindrical member. Therefore, even a first cylindrical member with a smaller wall thickness at one end than other parts in the axial direction can be easily and efficiently assembled to the second cylindrical member without involving one end between the second cylindrical member.

[0010] A second aspect of the present invention is a method for assembling a first cylindrical member made of an elastic body to a second cylindrical member, including a cylindrical member moving step, an end portion expanding step, and an assembling step. One end portion of the first cylindrical member has a smaller wall thickness than other portions in the axial direction. In the cylindrical member moving step, the first cylindrical member is moved so that the distance between one end portion of the first cylindrical member and one end portion of the second cylindrical member becomes a predetermined distance. In the end portion expanding step, one end portion of the first cylindrical member is expanded radially outward by supplying gas from a gas supply portion to the inside of the first cylindrical member. In the assembling step, the first cylindrical member is moved in the axial direction so that one end portion of the first cylindrical member is located radially outside one end portion of the second cylindrical member, and the first cylindrical member is assembled to the second cylindrical member.

[0011] In this aspect, after expanding one end portion of the first cylindrical member radially outward in the end portion expanding step, the first cylindrical member is assembled to the second cylindrical member by moving the first cylindrical member in the axial direction in the assembling step. Therefore, even the first cylindrical member having a smaller wall thickness at one end portion than other portions in the axial direction can be easily and efficiently assembled to the second cylindrical member without involving one end portion between the second cylindrical member.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0013] Hereinafter, a cylindrical member assembling device and a cylindrical member assembling method according to a plurality of embodiments will be described with reference to the drawings. In a plurality of embodiments, substantially the same constituent parts are denoted by the same reference numerals, and the description thereof will be omitted.

[0014] (First Embodiment) The cylindrical member assembling device of the first embodiment is shown in FIG. 1. The cylindrical member assembling device 1 is a device for assembling a first cylindrical member 70 made of an elastic body to a second cylindrical member 80.

[0015] The first cylindrical member 70 is formed in a cylindrical shape by an elastic body such as rubber, for example. More specifically, the first cylindrical member 70 has a member cylindrical portion 71, a member convex portion 72, a member convex portion 73, and the like. The member cylindrical portion 71 is formed in a substantially cylindrical shape such that the outer diameter decreases from the center in the axial direction toward one end side. The member convex portion 72 is formed in an annular shape so as to protrude radially inward from the inner peripheral wall of a portion located at a predetermined distance from one end of the member cylindrical portion 71. The member convex portion 73 is formed in an annular shape so as to protrude radially inward from the inner peripheral wall of the other end of the member cylindrical portion 71. The inner diameter of the member convex portion 73 is smaller than the inner diameter of the member convex portion 72.

[0016] One end 701 of the first cylindrical member 70 has a smaller wall thickness than other portions in the axial direction. The range indicated by R1 in FIG. 1 of the member cylindrical portion 71 corresponds to "one end 701".

[0017] The second cylindrical member 80 is formed in a cylindrical shape, for example, by metal. More specifically, the second cylindrical member 80 has a member cylindrical portion 81, a member bottom portion 82, a member concave portion 83, and the like. The member cylindrical portion 81 is formed in a cylindrical shape, for example. The member bottom portion 82 is formed so as to close the opening at the end of the member cylindrical portion 81. That is, the second cylindrical member 80 is formed in a bottomed cylindrical shape. The member concave portion 83 is formed in an annular shape so as to be recessed radially inward from the outer peripheral wall of a portion located at a predetermined distance from the end of the member cylindrical portion 81 on the side opposite to the member bottom portion 82. The depth of the member concave portion 83 from the outer peripheral wall of the member cylindrical portion 81 is set to be substantially the same as the protruding amount of the member convex portion 72 from the inner peripheral wall of the member cylindrical portion 71. The axial size of the member concave portion 83 is set to be substantially the same as the axial size of the member convex portion 72.

[0018] The distance between the end face of the member cylindrical portion 81 on the side opposite to the member bottom portion 82 and the member concave portion 83 is set to be substantially the same as the distance between the member convex portion 72 and the member convex portion 73. Further, the inner diameter D1 of one end portion 701 of the first cylindrical member 70 is smaller than the outer diameter D2 of one end portion 801 of the second cylindrical member 80.

[0019] <1>The cylindrical member assembling device 1 includes a cylindrical member moving portion 20, a gas supply portion 30, a control portion 40, and the like. The cylindrical member moving portion 20 can change the axial relative position between the first cylindrical member 70 and the second cylindrical member 80 by moving the first cylindrical member 70 in the axial direction. The gas supply portion 30 can supply air as a gas inside the first cylindrical member 70. The control portion 40 can control the operations of the cylindrical member moving portion 20 and the gas supply portion 30.

[0020] More specifically, the cylinder member moving unit 20 includes a holding unit 21, a driving unit 22, and a holding unit pump 23. The holding unit 21 includes a holding unit cylinder portion 211, a holding unit annular portion 212, and a holding unit hole portion 213. The holding unit cylinder portion 211 is formed, for example, in a cylindrical shape. The holding unit annular portion 212 is formed in an annular shape so as to extend radially inward from the inner peripheral wall at the axial end of the holding unit cylinder portion 211. A plurality of holding unit hole portions 213 are formed in the circumferential direction of the holding unit annular portion 212 so as to penetrate the holding unit annular portion 212 in the axial direction. The holding unit 21 is provided such that the end on the holding unit annular portion 212 side faces upward in the vertical direction. Therefore, the axial direction of the holding unit 21 substantially coincides with the vertical direction.

[0021] The holding unit 21 is formed to be large enough to accommodate the other end portion 702 of the first cylinder member 70 inside the holding unit cylinder portion 211 below the holding unit annular portion 212 in the vertical direction. Here, the lower surface of the holding unit annular portion 212 in the vertical direction is formed to be able to contact the end face of the other end portion 702 of the first cylinder member 70.

[0022] The driving unit 22 operates, for example, by being energized and can move the holding unit 21 in the axial direction, that is, in the vertical direction. The holding unit pump 23 operates, for example, by being energized, can inhale air from the suction port, pressurize the inhaled air, and discharge it from the discharge port. The suction port of the holding unit pump 23 is connected to the upper end portion of the holding unit hole portion 213 in the vertical direction. Therefore, when the holding unit pump 23 operates, a negative pressure is generated at the lower end portion of the holding unit hole portion 213 in the vertical direction. When the holding unit pump 23 operates with the lower surface of the holding unit annular portion 212 in the vertical direction in contact with the end face of the other end portion 702 of the first cylinder member 70, the first cylinder member 70 is adsorbed and held by the holding unit 21, and the fall-off from the holding unit 21 is suppressed.

[0023] The gas supply unit 30 includes a supply unit pump 31 and a supply unit 32. The supply unit pump 31 operates, for example, by being energized, sucks air from the suction port, pressurizes the sucked air, and can discharge it from the discharge port. The supply unit 32 is provided, for example, above the holding unit 21 in the vertical direction so as to be movable in the axial direction together with the holding unit 21. The supply unit 32 is connected to the discharge port of the supply unit pump 31 and can supply air to the inside of the holding unit 21.

[0024] The control unit 40 is a computer as a controller and can control the operations of the cylindrical member moving unit 20 and the gas supply unit 30 according to the stored program. More specifically, the control unit 40 can control the operation of the cylindrical member moving unit 20 by controlling the operations of the driving unit 22 and the holding unit pump 23. Also, the control unit 40 can control the operation of the gas supply unit 30 by controlling the operation of the supply unit pump 31.

[0025] The control unit 40 controls the cylindrical member moving unit 20 and moves the first cylindrical member 70 so that the distance between one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80 becomes a predetermined distance T1. The control unit 40 controls the gas supply unit 30 and expands one end 701 of the first cylindrical member 70 radially outward by supplying air to the inside of the first cylindrical member 70. The control unit 40 controls the cylindrical member moving unit 20 and moves the first cylindrical member 70 axially so that one end 701 of the first cylindrical member 70 is located radially outside one end 801 of the second cylindrical member 80, and assembles the first cylindrical member 70 to the second cylindrical member 80.

[0026] Next, an operation example of the cylindrical member assembling device 1 of the present embodiment will be described.

[0027] As shown in FIG. 1, for example, an operator or a robot places the second cylindrical member 80 at a predetermined position on the upper surface of the base 2 of the cylindrical member assembling device 1. Here, the operator or the robot places the second cylindrical member 80 so that the end on the member bottom 82 side of the second cylindrical member 80, that is, the other end 802 abuts on the upper surface of the base 2. The second cylindrical member 80 is preferably placed on the base 2 so as to be coaxial with the holding unit 21.

[0028] Subsequently, for example, an operator or a robot positions the other end portion 702 of the first cylindrical member 70 inside the holding portion cylindrical portion 211 such that the end face of the other end portion 702 of the first cylindrical member 70 abuts against the vertically lower surface of the holding portion annular portion 212. Here, the control unit 40 operates the holding portion pump 23. As a result, the first cylindrical member 70 is adsorbed and held by the holding portion 21.

[0029] Subsequently, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the holding portion 21 toward the base 2 side, thereby moving the first cylindrical member 70 such that the distance between one end portion 701 of the first cylindrical member 70 and one end portion 801 of the second cylindrical member 80 becomes a predetermined distance T1 (see FIG. 2).

[0030] Here, the predetermined distance T1 is, for example, 0. That is, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the first cylindrical member 70 such that one end portion 701 of the first cylindrical member 70 abuts against one end portion 801 of the second cylindrical member 80. Here, the space inside the first cylindrical member 70 is in a sealed state.

[0031] Subsequently, the control unit 40 controls the supply unit pump 31 of the gas supply unit 30 and supplies air from the supply unit 32 to the inside of the first cylindrical member 70 (see FIG. 2). As a result, the internal pressure of the space inside the first cylindrical member 70 increases. When the internal pressure of the space inside the first cylindrical member 70 increases, one end portion 701 of the first cylindrical member 70 deforms so as to expand radially outward (see FIG. 3).

[0032] Subsequently, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the holding portion 21 toward the base 2 side, thereby axially moving the first cylindrical member 70 such that one end portion 701 of the first cylindrical member 70 is located radially outside one end portion 801 of the second cylindrical member 80.

[0033] When the first cylindrical member 70 is moved until the member convex portion 72 enters the member concave portion 83 and the surface of the member convex portion 73 on the side of the member convex portion 72 abuts against the end surface of the member cylindrical portion 81, the assembly of the first cylindrical member 70 and the second cylindrical member 80 is completed (see FIG. 4).

[0034] Next, the method for assembling the cylindrical members will be described.

[0035] <4>The method for assembling the cylindrical members according to the present embodiment is a method for assembling a first cylindrical member 70 made of an elastic body to a second cylindrical member 80, and includes a cylindrical member moving step S101, an end portion expanding step S102, and an assembling step S103 (see FIG. 5). In the cylindrical member moving step S101, the first cylindrical member 70 is moved so that the distance between one end portion 701 of the first cylindrical member 70 and one end portion 801 of the second cylindrical member 80 becomes a predetermined distance T1 (see FIGS. 1 and 2). In the end portion expanding step S102, air is supplied from the gas supply unit 30 to the inside of the first cylindrical member 70 to expand one end portion 701 of the first cylindrical member 70 radially outward (see FIG. 3). In the assembling step S103, the first cylindrical member 70 is moved in the axial direction so that one end portion 701 of the first cylindrical member 70 is located radially outside one end portion 801 of the second cylindrical member 80, and the first cylindrical member 70 is assembled to the second cylindrical member 80 (see FIG. 4).

[0036] Next, the cylindrical member assembling device of the comparative form will be described.

[0037] As shown in FIG. 6, the cylindrical member assembling device of the comparative form is the same as the cylindrical member assembling device 1 of the present embodiment except that it does not include the gas supply unit 30.

[0038] In the comparative form, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20, and after moving the first cylindrical member 70 so that one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80 come into contact with each other, when the first cylindrical member 70 is further moved toward the base 2 side, one end 701 of the first cylindrical member 70 may be caught and deformed radially inward between one end 801 of the second cylindrical member 80. Therefore, it may be difficult to assemble the first cylindrical member 70 and the second cylindrical member 80.

[0039] On the other hand, the cylindrical member assembling device 1 of the present embodiment includes a gas supply unit 30. The control unit 40 controls the gas supply unit 30 and the cylindrical member moving unit 20, and after expanding one end 701 of the first cylindrical member 70 radially outward, by moving the first cylindrical member 70 in the axial direction, the first cylindrical member 70 can be easily assembled to the second cylindrical member 80 (see FIGS. 3 and 4).

[0040] As described above, <1> in the present embodiment, the control unit 40 controls the cylindrical member moving unit 20 and moves the first cylindrical member 70 so that the distance between one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80 becomes a predetermined distance T1. The control unit 40 controls the gas supply unit 30 and expands one end 701 of the first cylindrical member 70 radially outward by supplying air inside the first cylindrical member 70. The control unit 40 controls the cylindrical member moving unit 20 and moves the first cylindrical member 70 in the axial direction so that one end 701 of the first cylindrical member 70 is located radially outside one end 801 of the second cylindrical member 80, and assembles the first cylindrical member 70 to the second cylindrical member 80.

[0041] In the present embodiment, the control unit 40 controls the gas supply unit 30 and the cylindrical member moving unit 20, and after expanding one end 701 of the first cylindrical member 70 radially outward, by moving the first cylindrical member 70 in the axial direction, the first cylindrical member 70 is assembled to the second cylindrical member 80. Therefore, even the first cylindrical member 70 having a smaller wall thickness at one end 701 than other parts in the axial direction can be easily and efficiently assembled to the second cylindrical member 80 without catching one end 701 between the second cylindrical member 80.

[0042] Also, in <3>this embodiment, at least a part of the cylinder member moving portion 20 is located vertically above the first cylinder member 70 and can move the first cylinder member 70 in the axial direction while holding it.

[0043] Therefore, the first cylinder member 70 can be easily assembled to the second cylinder member 80 from the vertically upper side.

[0044] In this embodiment, the cylinder member moving portion 20 can move the first cylinder member 70 in the axial direction while adsorbing and holding it.

[0045] Also, <4>the cylinder member assembling method of this embodiment includes a cylinder member moving step S101, an end portion expanding step S102, and an assembling step S103. In the cylinder member moving step S101, the first cylinder member 70 is moved so that the distance between one end portion 701 of the first cylinder member 70 and one end portion 801 of the second cylinder member 80 becomes a predetermined distance T1. In the end portion expanding step S102, air is supplied from the gas supply portion 30 to the inside of the first cylinder member 70 to expand one end portion 701 of the first cylinder member 70 radially outward. In the assembling step S103, the first cylinder member 70 is moved in the axial direction so that one end portion 701 of the first cylinder member 70 is located radially outside one end portion 801 of the second cylinder member 80, and the first cylinder member 70 is assembled to the second cylinder member 80.

[0046] In this embodiment, after expanding one end portion 701 of the first cylinder member 70 radially outward in the end portion expanding step S102, the first cylinder member 70 is moved in the axial direction in the assembling step S103 to assemble the first cylinder member 70 to the second cylinder member 80. Therefore, even for the first cylinder member 70 having a smaller wall thickness at one end portion 701 compared to other portions in the axial direction, it can be easily and efficiently assembled to the second cylinder member 80 without involving one end portion 701 between the first cylinder member 70 and the second cylinder member 80.

[0047] (Second Embodiment) The cylindrical member assembling device of the second embodiment is shown in FIG. 7. The second embodiment is different from the first embodiment in the configuration of the gas supply unit 30 and the like.

[0048] In the present embodiment, the gas supply unit 30 further has a mandrel 33. As shown in FIG. 8, the mandrel 33 has a mandrel body 330, a mandrel hole portion 331, and a blowing outlet 332. The mandrel body 330 is formed in a cylindrical shape, for example, by metal. The mandrel hole portion 331 is formed so as to extend along the axis from one end portion of the mandrel body 330 to the other end portion side. The blowing outlet 332 is formed so as to open on the outer peripheral wall of the mandrel body 330. The blowing outlet 332 is connected to the end portion of the mandrel hole portion 331. Thereby, the air flowing in from the side opposite to the blowing outlet 332 of the mandrel hole portion 331 can be blown out from the blowing outlet 332 toward the radially outer side of the mandrel body 330.

[0049] More specifically, the mandrel body 330 has an upper body 333, a lower body 334, and a connecting portion 335. The upper body 333 is formed in a cylindrical shape having the mandrel hole portion 331 inside. The lower body 334 is formed in a cylindrical shape. The connecting portion 335 is integrally formed with the upper body 333 and the lower body 334 so as to connect the outer edge portion of the end face of the upper body 333 and the outer edge portion of the end face of the lower body 334. Two connecting portions 335 are formed at equal intervals in the circumferential direction of the upper body 333 (see FIG. 8(C)).

[0050] An opening surrounded by the upper body 333, the lower body 334, and the connecting portion 335 on the outer peripheral wall of the mandrel body 330 corresponds to the blowing outlet 332. Therefore, the air flowing in from the side opposite to the blowing outlet 332 of the mandrel hole portion 331 can be blown out from the blowing outlet 332 in substantially the entire circumferential range of the mandrel body 330.

[0051] The mandrel 33 has an end opposite to the air outlet 332 connected to the supply unit 32. Thus, when the supply unit pump 31 operates, the air discharged from the supply unit pump 31 flows into the mandrel hole 331 via the supply unit 32 and blows out from the air outlet 332. In this way, the mandrel 33 is formed with an air outlet 332 capable of blowing and supplying air.

[0052] Next, an operation example of the cylindrical member assembling device 1 of the present embodiment will be described.

[0053] As shown in FIG. 7, for example, an operator or a robot places the second cylindrical member 80 at a predetermined position on the upper surface of the base 2 of the cylindrical member assembling device 1 in the same manner as in the first embodiment.

[0054] Subsequently, for example, an operator or a robot positions the other end 702 of the first cylindrical member 70 inside the holding part cylindrical part 211 such that the end face of the other end 702 of the first cylindrical member 70 abuts against the lower surface in the vertical direction of the holding part annular part 212. Here, the control unit 40 operates the holding part pump 23. Thereby, the first cylindrical member 70 is adsorbed and held by the holding part 21. Further, the mandrel 33 is provided such that the air outlet 332 is located radially inside one end 701 of the first cylindrical member 70 (see FIG. 7).

[0055] Subsequently, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the holding part 21 toward the base 2 side, thereby moving the first cylindrical member 70 so that the distance between one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80 becomes a predetermined distance T1 (see FIG. 9).

[0056] Here, the predetermined distance T1 is, for example, a distance slightly larger than 0. That is, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the first cylindrical member 70 to a position where a slight gap is formed between one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80.

[0057] Subsequently, the control unit 40 controls the supply pump 31 of the gas supply unit 30 to supply air from the supply unit 32 to the inside of the first cylindrical member 70 via the mandrel 33 (see FIG. 9). As a result, air blows out from the blowout port 332 toward the radially outer side of the mandrel 33, that is, toward the inner peripheral wall of one end portion 701 of the first cylindrical member 70. The air blown out from the blowout port 332 pushes the inner peripheral wall of one end portion 701 of the first cylindrical member 70 radially outward, causing one end portion 701 of the first cylindrical member 70 to deform so as to expand radially outward (see FIG. 10).

[0058] Subsequently, the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 to move the holding unit 21 toward the base 2 side, thereby axially moving the first cylindrical member 70 so that one end portion 701 of the first cylindrical member 70 is located radially outside one end portion 801 of the second cylindrical member 80.

[0059] When the first cylindrical member 70 is moved until the member convex portion 72 enters the member concave portion 83 and the surface of the member convex portion 73 on the side of the member convex portion 72 abuts against the end face of the member cylindrical portion 81, the assembly of the first cylindrical member 70 and the second cylindrical member 80 is completed (see FIG. 11).

[0060] Also in this embodiment, as in the first embodiment, even the first cylindrical member 70 having a smaller wall thickness at one end portion 701 than other portions in the axial direction can be easily and efficiently assembled to the second cylindrical member 80 without involving one end portion 701 between the second cylindrical member 80.

[0061] As described above, <2> in this embodiment, the gas supply unit 30 has a mandrel 33 formed with a blowout port 332 capable of blowing out and supplying air. The mandrel 33 is provided such that the blowout port 332 is located radially inside one end portion 701 of the first cylindrical member 70.

[0062] Therefore, the air blown out from the blowout port 332 can surely expand one end portion 701 of the first cylindrical member 70 radially outward.

[0063] (Other embodiments) In the above-described embodiment, an example in which the first cylindrical member is formed of rubber as an elastic body was shown. In contrast, in other embodiments, the first cylindrical member may be formed of, for example, metal, resin, or the like as long as it is an elastic body, not limited to rubber.

[0064] Also, in the above-described embodiment, an example in which the gas supply unit can supply air as the gas was shown. In contrast, in other embodiments, the gas supply unit may be able to supply a gas other than air as long as it is a gas.

[0065] Also, in the above-described embodiment, an example in which the second cylindrical member 80 is formed in a bottomed cylindrical shape was shown. In contrast, in other embodiments, it may be formed in a cylindrical shape without a bottom (82). In this case, in order to increase the internal pressure of the space inside the first cylindrical member 70 and expand one end 701 in the radial direction as in the first embodiment, it is desirable to reliably block the end of the second cylindrical member 80 on the side opposite to the first cylindrical member 70 with a base 2 or the like.

[0066] Also, in other embodiments, the second cylindrical member 80 may be formed in a solid cylindrical shape. Also, the second cylindrical member may be formed of, for example, resin or the like, not limited to metal.

[0067] Also, in other embodiments, the first cylindrical member 70 may be formed in any shape as long as one end 701 has a smaller wall thickness compared to other parts in the axial direction.

[0068] Also, in the second embodiment, an example was shown in which the control unit 40 controls the drive unit 22 of the cylindrical member moving unit 20 and moves the holding unit 21 to the base 2 side to move the first cylindrical member 70 so that the distance between one end 701 of the first cylindrical member 70 and one end 801 of the second cylindrical member 80 becomes a predetermined distance T1 that is slightly larger than 0. In contrast, in other embodiments, the predetermined distance T1 may be set to 0.

[0069] Also, in other embodiments, the holding unit 21 may not have the holding unit pump 23 and may hold the first cylindrical member 70 by a method other than adsorption, such as mechanically gripping it.

[0070] Thus, the present disclosure is not limited to the above-described embodiments, and can be implemented in various forms without departing from the gist thereof.

Explanation of Reference Numerals

[0071] 1 Cylindrical member assembling device, 20 Cylindrical member moving part, 30 Gas supply part, 40 Control part, 70 First cylindrical member, 80 Second cylindrical member, 701 One end (first cylindrical member), 801 One end (second cylindrical member)

Claims

1. A cylindrical member assembling device for assembling a first cylindrical member (70) made of an elastic body to a second cylindrical member (80), a cylindrical member moving part (20) capable of changing the axial relative position between the first cylindrical member and the second cylindrical member by moving the first cylindrical member in the axial direction, a gas supply part (30) capable of supplying gas inside the first cylindrical member, and a control part (40) capable of controlling the operation of the cylindrical member moving part and the gas supply part, wherein one end (701) of the first cylindrical member has a smaller wall thickness than other parts in the axial direction, the control part, controls the cylindrical member moving part to move the first cylindrical member so that the distance between one end (701) of the first cylindrical member and one end (801) of the second cylindrical member becomes a predetermined distance (T1), controls the gas supply part to supply gas inside the first cylindrical member to expand one end (701) of the first cylindrical member radially outward, controls the cylindrical member moving part to axially move the first cylindrical member so that one end (701) of the first cylindrical member is located radially outside one end (801) of the second cylindrical member, and the cylindrical member assembling device for assembling the first cylindrical member to the second cylindrical member.

2. The gas supply part has a mandrel (33) formed with a blowout port (332) capable of blowing and supplying gas, The cylindrical member assembling device according to claim 1, wherein the mandrel is provided such that the blowout port is located radially inside one end (701) of the first cylindrical member.

3. The cylindrical member moving part, at least a part of which is located vertically above the first cylindrical member, and is capable of moving the first cylindrical member axially while holding it. The cylindrical member assembling device according to claim 1 or 2.

4. A cylindrical member assembling method for assembling a first cylindrical member (70) made of an elastic body to a second cylindrical member (80), wherein one end (701) of the first cylindrical member has a smaller wall thickness than other parts in the axial direction, a cylindrical member moving step (S101) of moving the first cylindrical member so that the distance between one end (701) of the first cylindrical member and one end (801) of the second cylindrical member becomes a predetermined distance (T1), an end expanding step (S102) of expanding one end (701) of the first cylindrical member radially outward by supplying gas from a gas supply part (30) inside the first cylindrical member, An assembling step (S103) of axially moving the first cylindrical member so that one end portion (701) of the first cylindrical member is positioned radially outside one end portion (801) of the second cylindrical member, and assembling the first cylindrical member to the second cylindrical member. A cylindrical member assembling method including the above.

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