JP2023156030A - Cylindrical body connection method and cylindrical body caulking device - Google Patents

Abstract

To provide a cylindrical body connection method and a cylindrical body caulking device capable of reducing a work load for caulking a cylindrical member large in diameter or high in strength.SOLUTION: This cylindrical body connection method comprises: an insertion step of inserting a joint member into first and second cylindrical members or inserting the first and second cylindrical members into the joint member over the first and second cylindrical members; a first fitting step of fitting a cylindrical body caulking device to the outer periphery of the first cylindrical member or the joint member; a first caulking step of pressing, after or simultaneously with the first fitting step, a circumferential part of the first cylindrical member or the joint member, and caulking and connecting the first cylindrical member and the joint member; a second fitting step of fitting the cylindrical body caulking device to the outer periphery of the second cylindrical member or the joint member; and a second caulking step of pressing, after or simultaneously with the second fitting step, a circumferential part of the second cylindrical member or the joint member, and caulking and connecting the second cylindrical member and the joint member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cylindrical body connecting method and a cylindrical body caulking device.

Conventionally, as a method for connecting a plurality of cylindrical members, a connection method using a caulking device is known. For example, in Patent Document 1, in a state where a joint pipe is inserted into two pipes and spans the two pipes, the pipe is sandwiched between the gaps between opposing protrusions with the left and right handles open, A pipe crimping device is described that crimps the pipe with opposing protrusions by closing the left and right handles inward.

Utility Model Publication No. 63-127717

However, in the pipe caulking device described in Patent Document 1, the operation of closing the left and right handles inward is performed manually, so although pipes with a small diameter and low strength can be caulked, pipes with a large diameter or strength There is a problem in that tall pipes cannot be caulked, or even if they can be caulked, the caulking work is difficult.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for connecting cylindrical bodies and a cylindrical body that can reduce the work burden when caulking a cylindrical member having a large diameter or high strength. Our goal is to provide body caulking devices.

In order to achieve the above object, the cylindrical body connecting method according to the present invention includes a first cylindrical member and a second cylindrical member. an insertion step of inserting a joint member or passing the first cylindrical member and the second cylindrical member into the joint member; and caulking the cylindrical body around the outer periphery of the first cylindrical member or the joint member. After or in parallel with the first mounting step of mounting the container, or the first mounting step, press a part of the first cylindrical member or the joint member in the circumferential direction, and press the first cylindrical member or the joint member. a first crimping step of caulking and connecting the shaped member and the joint member; a second mounting step of mounting a cylindrical body crimping device on the outer periphery of the second cylindrical member or the joint member; and a second mounting step. After or in parallel with this, a second caulking presses a part of the second cylindrical member or the joint member in the circumferential direction to caulk and connect the second cylindrical member and the joint member. It is characterized by comprising a process.

In the method for connecting cylindrical bodies according to the present invention, in the first crimping step, in a state where a part of the first cylindrical member or the joint member in the circumferential direction is supported by surface contact, the first crimping step is performed by caulking the first cylindrical member or the joint member facing the supported portion. The first cylindrical member and the joint member are connected by pressing the parts, and the second crimping step includes contacting a part of the second cylindrical member or the joint member in the circumferential direction by surface contact. In the supported state, it is preferable to press a portion facing the support portion to caulk and connect the second cylindrical member and the joint member.

In the method for connecting cylindrical bodies according to the present invention, the first caulking step is performed in a state where the first cylindrical member or the joint member is supported by surface contact with another circumferential portion of the first cylindrical member or the joint member. the first cylindrical member and the joint member are crimped to connect the first cylindrical member and the joint member; The second cylindrical member and the joint member may be connected to each other by pressing a portion facing the supported portion in a state where the portion is supported by surface contact, and by caulking the second cylindrical member and the joint member.

In the method for connecting cylindrical bodies according to the present invention, the first caulking step simultaneously connects a part of the first cylindrical member or the joint member in the circumferential direction and another part in the circumferential direction different from this. The first cylindrical member and the joint member are connected by pressing, and the second crimping step is performed on a part of the second cylindrical member or the joint member in the circumferential direction, which is different from this. It is preferable that the second cylindrical member and the joint member be caulked and connected by simultaneously pressing other parts in the circumferential direction.

Further, the cylindrical body crimping device according to the present invention is a cylindrical body crimping device that crimps and connects a cylindrical member and a joint member inserted into the cylindrical member or through which the cylindrical member is inserted. The main body includes a main body that can surround the outer periphery of the cylindrical member or the joint member, and a pressing part that can press a part of the cylindrical member or the joint member in a circumferential direction. includes a first body portion surrounding a part of the cylindrical member or the joint member, a second body portion surrounding another portion of the cylindrical member or the joint member, the first body portion and the joint member. The present invention is characterized in that it includes a fastening part that causes the second main body part to approach or separate, and is configured to be able to be attached to the outer periphery of the cylindrical member or the joint member by the fastening part.

In the cylindrical body caulking device according to the present invention, the fastening portion includes a fastening bolt provided at one tip end side of the first main body portion and the second main body portion, and a fastening bolt provided on the distal end side of one of the first main body portion and the second main body portion. It is preferable to include an insertion part provided on the other tip side of the part and into which the fastening bolt is inserted, and a nut screwed into the fastening bolt.

In the cylindrical body caulking device according to the present invention, the pressing portion is provided in at least one of the first main body portion and the second main body portion, and in a state where the fastening bolt is inserted through the insertion portion, the pressing portion is provided in the first main body portion and the second main body portion. By tightening the nut with respect to the fastening bolt, the first main body part and the second main body part are tightened in a direction toward each other, and the pressing part presses the cylindrical member or the joint member, The cylindrical member and the joint member may be configured to be connected by caulking.

In the cylindrical body caulking device according to the present invention, it is preferable that the pressing part has a protrusion that presses the cylindrical member or the joint member, and the protrusion has a curved tip. .

The cylindrical body caulking device according to the present invention further includes a receiving portion capable of supporting a portion of the cylindrical member or the joint member that faces the pressing portion through surface contact, and the cylindrical member or the joint member The cylindrical member and the joint member may be connected by caulking by pressing the cylindrical member or the joint member with the pressing portion while the cylindrical member is supported by the receiving portion. good.

In the cylindrical body caulking device according to the present invention, the receiving portion has a positioning hole portion penetrating from a support surface that supports the cylindrical member or the joint member to a surface opposite to the support surface. is preferred.

In the cylindrical body caulking device according to the present invention, the receiving portion may be configured to be able to support an area of 90° or more and less than 180° in the circumferential direction of the cylindrical member or the joint member through surface contact. .

In the cylindrical body caulking device according to the present invention, it is preferable that the pressing portions are provided in the first body portion and the second body portion, respectively.

According to the method for connecting cylindrical bodies and the cylindrical body caulking device of the present invention, it is possible to reduce the work burden when caulking a cylindrical member having a large diameter or high strength.

FIG. 2 is a perspective view showing a cylindrical body crimping device according to the present embodiment. FIG. 2 is a side view showing the cylindrical body crimping device according to the present embodiment. FIG. 3 is a diagram showing a state in which a joint member is inserted into the cylindrical member according to the present embodiment. FIG. 6 is a diagram showing a state in which the receiving portion according to the present embodiment supports a part of the cylindrical member in the circumferential direction through surface contact. It is a figure showing the state where the cylindrical member and the joint member concerning this embodiment are caulked at one point. It is a figure which shows the state where the receiving part based on this embodiment supports the other part of the circumferential direction of the cylindrical member by surface contact. It is a figure showing the state where the cylindrical member and the joint member concerning this embodiment are caulked at two points. It is a figure showing the state where the 1st cylindrical member and the 2nd cylindrical member concerning the present invention were connected. It is a side view which shows the modification of a cylindrical body crimping device. It is a figure which shows the state where the cylindrical body caulking device based on a modification was mounted on the cylindrical member. It is a figure which shows the state where the cylindrical body caulking device based on a modification has caulked the cylindrical member and the joint member at two points.

Hereinafter, preferred embodiments for carrying out the present invention will be described using the drawings. Note that the following embodiments do not limit the inventions claimed in each claim, and not all combinations of features described in the embodiments are essential to the solution of the invention. . Furthermore, in this embodiment, the scale and dimensions of each component may be exaggerated, or some components may be omitted.

[Overall configuration of cylindrical body crimping device]
The cylindrical body caulking device 1 according to the present embodiment is a cylinder that crimps and connects a cylindrical member 2 and a joint member 3 inserted into the cylindrical member 2 or through which the cylindrical member 2 is inserted. It is a shape caulking device. Specifically, as shown in FIGS. 1 and 2, the cylindrical body caulking device 1 includes a main body portion 10 that can surround the outer periphery of the cylindrical member 2 or the joint member 3, and a body portion 10 that can surround the outer periphery of the cylindrical member 2 or the joint member 3. It is provided with a pressing part 20 that can press a part of the circumferential direction, and a receiving part 30 that can support the part of the cylindrical member 2 or the joint member 3 that faces the pressing part 20 by surface contact.

Hereinafter, in this embodiment, the structure of the cylindrical body caulking device 1 and the cylindrical body connection method will be explained on the premise that the joint member 3 is inserted into the cylindrical member 2. The cylindrical body caulking device 1 according to this embodiment can also be applied in a state where the cylindrical member 2 is inserted into the joint member 3. There is no difference in the structure of the cylindrical body caulking device 1 and the method for connecting the cylindrical bodies in the state in which the cylindrical member 2 is inserted into the member 3.

Further, in this embodiment, the main body part 10, the pressing part 20, and the receiving part 30 are described as being constituted by separate members, but the main body part 10, the pressing part 20, and the receiving part 30 are not limited to this. may be formed by integral molding.

In this embodiment, the cylindrical member 2 is, for example, SGP (carbon steel pipe for piping) or STK (carbon steel pipe for general structure), but is not limited thereto. Furthermore, in this embodiment, the joint member 3 can be made of various known metal materials.

[Main body configuration]
As shown in FIGS. 1 and 2, the main body part 10 includes a first main body part 11 that surrounds a part of the cylindrical member 2 in the circumferential direction, and a first main body part 11 that surrounds a part of the cylindrical member 2 in the circumferential direction. The second main body portion 12 is formed into an annular shape that can surround the outer periphery of the cylindrical member 2 as a whole. The first main body part 11 is formed in a substantially semicircular shape forming the semicircle of the main body part 10 having an annular shape, and the second main body part 12 forms the remaining semicircle of the main body part 10 having an annular shape. It is formed in an approximately semicircular shape. The first body portion 11 and the second body portion 12 are rotatably connected to each other by a shaft portion 13a at the base end portion (one end portion in the circumferential direction) of the body portion 10. The first main body part 11 and the second main body part 12 each have arcuate recesses 11a and 12a on their inner peripheral surfaces.

Moreover, the main body part 10 is provided with a fastening part 14 that brings the first main body part 11 and the second main part 12 closer together or apart, and is configured to be able to be attached to the outer periphery of the cylindrical member 2 by the fastening part 14. There is. The fastening portion 14 includes a fastening bolt 14a provided on the distal end side (the other end in the circumferential direction) of the second main body portion 12, and an insertion bolt 14a provided on the distal end side of the first main body portion 11 through which the fastening bolt 14a is inserted. It includes a portion 14b and a nut 14c that is screwed onto the fastening bolt 14a. Note that a configuration may be adopted in which the first body part 11 is provided with the fastening bolt 14a, and the second body part 12 is provided with the insertion part 14b.

The fastening bolt 14a is provided to protrude from the second body part 12 toward the first body part 11 side, and is rotatably attached to the second body part 12 by the shaft part 13b. The insertion portion 14b is a notch formed by cutting out the center of the tip of the first body portion 11 in the circumferential direction, and the insertion portion 14b makes the tip of the first body portion 11 approximately U-shaped. It is formed in the shape of In the fastening part 14 according to the present embodiment, by tightening the nut 14c in a state where the fastening bolt 14a is inserted through the insertion part 14b, the first main body part 11 and the second main body part 12 approach each other, and the first main body part By loosening the first body part 11 and the second body part 12, the first body part 11 and the second body part 12 are separated from each other. Note that various known connecting members can be employed as the shaft portion 13a and the shaft portion 13b.

In addition, as shown in FIG. 2, when a pressing section 20 (described later) is attached to the first main body section 11, a screw receiving section 21a provided on a base section 21 (described later) of the pressing section 20 has a A through hole 11b is formed. Further, in the second main body portion 12, a through hole 12b is formed at a position corresponding to a positioning hole portion 31 of the receiving portion 30, which will be described later, when the receiving portion 30, which will be described later, is attached.

Note that the material constituting the main body portion 10 may be any material that has enough strength to withstand the stress generated when the pressing portion 20, which will be described later, presses the cylindrical member 2.

[Composition of pressing part]
The pressing part 20 is provided on at least one of the first main body part 11 and the second main body part 12, and in this embodiment, it is provided on the first main body part 11. Specifically, the pressing part 20 includes an arcuate base 21 that is attached to fit into the recess 11a of the first body 11, and a cylindrical member that protrudes from the base 21 toward the second body 12. 2.

The base portion 21 has a size that allows it to fit into the recess 11a of the first main body portion 11 in the circumferential direction and the axial direction, and has a length longer than the recess 11a in the radial direction. Further, the base 21 is provided with a concave screw receiving portion 21a extending from the vicinity of the center of the outer circumferential surface of the base 21 to the vicinity of the center of the base 21. The protrusion 22 has a substantially triangular cross section that protrudes from the inner circumferential surface of the base 21 near the center toward the second main body 12, and has a curved tip 22a. In addition, the protrusion part 22 should just have at least the length which can caulk the cylindrical member 2 and the joint member 3 when pressing the cylindrical member 2 in a protrusion direction.

Moreover, the pressing part 20 is configured to be detachable from the main body part 10. Specifically, in the state where the base 21 is attached to the recess 11a of the first body 11, the pressing part 20 has a screw or a screw passing through the screw receiving part 21a of the base 21 and the through hole 11b of the first body 11. It is configured to be fixed to the main body part 10 by screwing together with a screw member 4 such as a bolt, and to be removed from the main body part 10 by removing the screw member 4 from the screw receiving part 21a. Note that, as shown in FIG. 2, the screw member 4 is formed to have a length in the axial direction that is longer than the length in the axial direction of the screw receiving portion 21a provided in the base portion 21.

Further, the pressing portion 20 is configured to be able to move forward and backward relative to the first main body portion 11 along the protruding direction of the protruding portion 22 . Specifically, the pressing part 20 advances from the first main body part 11 side to the second main body part 12 side and presses the cylindrical member 2 by screwing the screw member 4 toward the second main body part 12 side. is configured to do so. On the other hand, the pressing portion 20 is configured to retreat toward the first body portion 11 side and separate from the cylindrical member 2 by retracting the screw member 4 toward the first body portion 11 side.

Note that the pressing part 20 is preferably made of a material having a harder hardness than the cylindrical member 2 and the joint member 3, and in this embodiment, it is made of a material equivalent to S45C.

[Configuration of the receiving part]
The receiving portion 30 is provided in the second main body portion 12 of the main body portion 10, and is formed in an arc shape having a length longer than the recessed portion 12a in the radial direction. Further, the receiving portion 30 is configured to be able to support a portion of the cylindrical member 2 in the circumferential direction through surface contact. Specifically, the receiving portion 30 is preferably configured to be able to support a region of 90° or more and less than 180° in the circumferential direction of the cylindrical member 2 through surface contact.

That is, as shown in FIG. 2, in the receiving part 30, the angle θ between the virtual line VL1 extending along one end surface in the circumferential direction and the virtual line VL2 extending along the other end surface in the circumferential direction is preferably 90. It is configured such that the angle is greater than or equal to 180 degrees. When the receiving portion 30 has such a configuration, it becomes possible to prevent the cylindrical member 2 from deforming due to external force applied from the second main body portion 12 when the cylindrical member 2 is pressed.

Moreover, the receiving part 30 is configured to be detachable from the main body part 10. Specifically, the receiving part 30 is formed with a size that can fit into the recess 12a of the second main body part 12 in the axial direction, and by fitting into the recess 12a of the second main body part 12, the receiving part 30 10 and is configured to be removed from the main body part 10 by taking out the receiving part 30 that is fitted into the recess 12a of the second main body part 12.

Further, as shown in FIGS. 1 and 2, the receiving portion 30 has a positioning hole portion 31 near its center that extends from the supporting surface that supports the cylindrical member 2 to the opposing surface of the supporting surface. are doing. Specifically, the positioning hole portion 31 allows the projection portion 22 of the pressing portion 20 to press the cylindrical member 2 in a state where the receiving portion 30 supports a part of the cylindrical member 2 in the circumferential direction through surface contact. It is formed at a position 180° opposite the position. Note that the position where the positioning hole portion 31 is formed is not limited to this, and may be formed at a position shifted by 120° from the position where the projection portion 22 of the pressing portion 20 presses the cylindrical member 2, for example. As described above, since the receiving part 30 has the positioning hole part 31, the position where the cylindrical member 2 is pressed by the projection part 22 (already Since the caulking traces) can be visually recognized, there is an advantage that when pressing a position different from the pressed position described above, it becomes easy to position the pressed position.

Note that the material constituting the receiving part 30 does not need to have as much strength as the pressing part 20, and for example, a material equivalent to SS400 can be used.

[Method of connecting cylindrical bodies using a cylindrical body caulking device]
The cylindrical body caulking device 1 according to the present embodiment is configured to tighten the nut 14c with respect to the fastening bolt 14a in a state where the fastening bolt 14a is inserted through the insertion portion 14b. are tightened in the direction in which they approach each other, and the pressing portion 20 presses the cylindrical member 2 to caulk and connect the cylindrical member 2 and the joint member 3. Further, the cylindrical body caulking device 1 according to the present embodiment can be connected to the cylindrical member 2 by pressing the cylindrical member 2 with the pressing part 20 while the cylindrical member 2 is supported by the receiving part 30. The member 3 is caulked and connected.

Hereinafter, a method for connecting the first cylindrical member 2A and the second cylindrical member 2B using the cylindrical body caulking device 1 as described above will be described in detail with reference to FIGS. 3 to 8.

[Insertion process]
First, as shown in FIG. 3, the joint member 3 is inserted into the first cylindrical member 2A and the second cylindrical member 2B, spanning the first cylindrical member 2A and the second cylindrical member 2B. .

[First installation process and first caulking process]
Next, as shown in FIG. 3, the cylindrical body caulking device 1 is attached to the outer periphery of the first cylindrical member 2A at a position where the first cylindrical member 2A and the joint member 3 overlap. Specifically, after bringing the receiving portion 30 into surface contact with a part of the first cylindrical member 2A in the circumferential direction, as shown in FIG. By inserting the fastening bolt 14a of the second main body part 12 through 14b, the cylindrical body caulking device 1 is attached to the outer periphery of the first cylindrical member 2A. In this state, the receiving portion 30 supports a portion of the first cylindrical member 2A in the circumferential direction.

After or in parallel with the first mounting process, a portion of the first cylindrical member 2A in the circumferential direction is pressed, and the first cylindrical member 2A and the joint member 3 are caulked and connected. Specifically, as shown in FIG. 5, in a state where the receiving portion 30 supports a portion of the first cylindrical member 2A in the circumferential direction through surface contact, the nut 14c is tightened against the fastening bolt 14a. The protruding portion 22 of the pressing portion 20 presses the portion facing the support portion, and the first cylindrical member 2A and the joint member 3 can be caulked and connected. Note that if tightening with the nut 14c is insufficient for caulking, by threading the screw member 4 toward the second body portion 12, the pressing portion 20 will further advance toward the second body portion 12. The cylindrical member 2 can be further pressed.

Next, as shown in FIG. 6, the cylindrical member is attached in a manner similar to the above-described mounting procedure so that the receiving portion 30 supports other parts of the first cylindrical member 2A in the circumferential direction through surface contact. The caulking device 1 is attached to the outer periphery of the first cylindrical member 2A. Note that, as shown in FIG. 6, in a state in which the other portions of the first cylindrical member 2A in the circumferential direction are supported by the receiving portion 30, the positioning hole portion 31 of the receiving portion 30 and the second main body portion 12 are penetrated. By aligning the hole 12b with the pressed position (the caulking mark that has already been made), it becomes easier to determine the pressing position. For example, it is possible to accurately shift the circumferential positions of the first caulking position and the second caulking position by 180 degrees.

As shown in FIG. 7, in a state where the receiving part 30 supports other parts of the first cylindrical member 2A in the circumferential direction through surface contact, the protruding part 22 of the pressing part 20 is tightened by tightening the nut 14c. presses the portion facing the support portion, and the first cylindrical member 2A and the joint member 3 can be caulked and connected. In addition, if caulking is insufficient only by tightening the nut 14c, the pressing part 20 can be further advanced by screwing the screw member 4 toward the second main body part 12 in the same way as pressing the first part. The cylindrical member 2 may be further pressed by pressing the cylindrical member 2.

[Second installation process and second caulking process]
Next, the same procedure as the first caulking step is performed to caulk and connect the second cylindrical member 2B and the joint member 3. That is, by the same procedure as the first mounting process, the cylindrical body caulking device 1 is mounted on the outer periphery of the second cylindrical member 2B, and the receiving part 30 faces a part of the second cylindrical member 2B in the circumferential direction. By screwing the nut 14c and/or the screw member 4 toward the second body part 12 in a state where they are supported by contact, the projection part 22 of the pressing part 20 presses the part facing the supported part, and The two cylindrical members 2B and the joint member 3 can be connected by caulking.

Further, in a state in which the receiving part 30 supports other parts of the second cylindrical member 2B in the circumferential direction by surface contact, the nut 14c and/or the screw member 4 are attached to the second body by the same procedure as the first mounting process. By screwing it toward the part 12 side, the protruding part 22 of the pressing part 20 presses the part facing the support part, and the second cylindrical member 2B and the joint member 3 can be caulked and connected.

In this way, by performing the insertion step, the first mounting step, the first crimping step, the second mounting step, and the second crimping step, the first cylindrical member 2A and the joint member 3 are connected, and the second The cylindrical member 2B and the joint member 3 are connected, and as a result, the first cylindrical member 2A and the second cylindrical member 2B can be connected via the joint member 3, as shown in FIG. Further, the cylindrical body crimping device 1 according to the present embodiment can be configured by changing the size of the cylindrical body crimping device 1 according to the diameter of the cylindrical member 2, or by changing the size of the cylindrical body crimping device 1 according to the diameter of the cylindrical member 2. By changing the size of the pressing part 20 and/or the receiving part 30, it is possible to accommodate a plurality of types of cylindrical members 2.

In addition, in this embodiment, the first cylindrical member 2A and the joint member 3 are connected by caulking at two points, and the second cylindrical member 2B and the joint member 3 are connected by caulking at two points. Although the explanation is not limited thereto, the number of caulking points of the first cylindrical member 2A and the second cylindrical member 2B to the joint member 3 may be one point, or three or more points. good. When caulking three or more points, it is preferable that the caulking positions are arranged at equal intervals (phase difference) in the circumferential direction. For example, if there are three caulking positions, each caulking position is preferably arranged at 120 degree intervals, and if there are four caulking positions, each caulking position is preferably arranged at 90 degree intervals. It is preferable that they be arranged at a distance.

[Advantages of the cylindrical body caulking device according to this embodiment]
In this way, the cylindrical body caulking device 1 according to the present embodiment connects the cylindrical member 2 and the joint member 3 inserted into the cylindrical member 2 or through which the cylindrical member is inserted. The cylindrical body caulking device 1 includes a main body portion 10 that can surround the outer periphery of the cylindrical member 2 or the joint member 3, and a press that can press a part of the cylindrical member 2 or the joint member 3 in the circumferential direction. The main body 10 includes a first main body 11 that surrounds a part of the cylindrical member 2 or the joint member 3, and a second main body that surrounds other parts of the cylindrical member 2 or the joint member 3. 12 and a fastening part 14 that brings the first main body part 11 and the second main body part 12 closer together or apart, and is configured so that it can be attached to the outer periphery of the cylindrical member 2 or the joint member 3 by the fastening part 14. .

According to the cylindrical body caulking device 1 having such a configuration, the fastening portion 14 brings the first body portion 11 and the second body portion 12 closer together, so that the pressing portion 20 presses the cylindrical member 2 or the joint member 3. Since the cylindrical member 2 and the joint member 3 can be crimped by pressing a portion in the circumferential direction, human power is not required when crimping the cylindrical member, and the cylindrical member has a large diameter or high strength. It has the remarkable advantage of being able to reduce the workload when caulking.

Further, the cylindrical body crimping device 1 having the above-mentioned configuration is effective when, for example, assembling a handrail at a construction site or the like. That is, in general, a handrail is assembled by connecting the ends of a plurality of cylindrical members by welding them together all around the circumference, but according to the cylindrical body caulking device 1 having the above configuration, welding is performed. No work is required, and the cylindrical member 2 and the joint member 3 can be caulked just by pressing the cylindrical member 2, so that the connection work is easy and work efficiency can be improved.

Further, in the cylindrical body caulking device 1 according to the present embodiment, the fastening portion 14 includes a fastening bolt 14a provided at the tip end side of one of the first main body portion 11 and the second main body portion 12, and the first main body portion The second main body portion 12 includes an insertion portion 14b provided on the other end side, through which the fastening bolt 14a is inserted, and a nut 14c screwed onto the fastening bolt 14a. According to the cylindrical body caulking device 1 having such a configuration, the cylindrical member 2 and the joint member 3 can be caulked by simply tightening the nut 14c against the fastening bolt 14a with an electric screwdriver or the like. This has the advantage that the work load when caulking a large or strong cylindrical member can be significantly reduced.

Further, in the cylindrical body caulking device 1 according to the present embodiment, the pressing part 20 has a protrusion 22 that presses the cylindrical member 2, and the protrusion 22 has a tip 22a formed in a curved shape. . According to the cylindrical body caulking device 1 having such a configuration, when the cylindrical member 2 is pressed, the stress applied to the tip 22a can be dispersed, and the durability of the protrusion 22 can be improved. This has the advantage that the cylindrical body crimping device 1 can be used for a long period of time.

Further, the cylindrical body caulking device 1 according to the present embodiment further includes a receiving part 30 that can support the part of the cylindrical member 2 or the joint member 3 facing the pressing part 20 by surface contact, and By pressing the cylindrical member 2 or the joint member 3 with the pressing part 20 while the cylindrical member 2 or the joint member 3 is supported by the receiving part 30, the cylindrical member 2 and the joint member 3 can be caulked and connected. configured to be possible. According to the cylindrical body caulking device 1 having such a configuration, since the receiving part 30 supports a part of the cylindrical member 2 or the joint member 3 in the circumferential direction through surface contact, the pressing part 20 When pressing the cylindrical member 2 or the joint member 3, the external force applied from the second main body portion 12 to the cylindrical member 2 can be dispersed, and the cylindrical member 2 and the joint It also has the advantage that the member 3 can be caulked.

Furthermore, in the cylindrical body caulking device 1 according to the present embodiment, the receiving portion 30 has a positioning hole portion 31 that penetrates from the support surface that supports the cylindrical member 2 or the joint member 3 to the opposing surface of the support surface. have According to the cylindrical body caulking device 1 having such a configuration, the position where the cylindrical member 2 or the joint member 3 is pressed by the protrusion 22 (the caulking mark that has already been caulked) can be visually recognized, so that the pressed position and This has the advantage that positioning becomes easy when pressing at different positions.

Further, in the cylindrical body caulking device 1 according to the present embodiment, the receiving part 30 is configured to be able to support an area of 90° or more and less than 180° in the circumferential direction of the cylindrical member 2 or the joint member 3 by surface contact. ing. According to the cylindrical body caulking device 1 having such a configuration, since the receiving part 30 is brought into surface contact with the cylindrical member 2 or the joint member 3 over a wide range, the pressing part 20 is in surface contact with the cylindrical member 2 or the joint member 3. This has the advantage that when pressing the member 3, the external force applied from the second main body portion 12 to the cylindrical member 2 can be sufficiently dispersed, and deformation of the cylindrical member 2 can be prevented.

[Modified example]
The cylindrical body crimping device according to the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the technical idea of the present invention.

For example, in the embodiment described above, the first main body part 11 is provided with the pressing part 20, and the second main body part 12 is provided with the receiving part 30, but the present invention is not limited to this, and for example, As shown in FIG. 9, pressing portions 20' may be provided on the first body portion 11' and the second body portion 12', respectively. Hereinafter, the structure of such a cylindrical body caulking device 1' and the method for connecting the cylindrical bodies will be explained using FIGS. 9 to 11. Note that the same configurations as those in the embodiment described above are indicated by the same reference numerals, or the description thereof will be omitted.

As shown in FIG. 9, the cylindrical body caulking device 1' has a first body part 11' that includes a semicircular first holding part 15 and a plate-shaped first extension extending from the tip of the first holding part 15. The second main body part 12' includes a semicircular second holding part 17 and a plate-shaped second extending part 18 extending from the tip of the second holding part 17. The configuration is different from the above-described embodiment in that the configuration is different from the above-described embodiment. Further, the configuration of the cylindrical body crimping device 1' differs from that of the above-described embodiment in that the pressing portion 20' is constituted by a screw member.

The first holding part 15 and the second holding part 17 are formed to have the same shape and size, and have a through hole 11b' and a through hole 12b', respectively, in the center in the circumferential direction through which the pressing part 20' can pass. ing. The first holding part 15 and the second holding part 17 are configured to hold the pressing part 20' in a state where the pressing part 20' is passed through the through hole 11b' and the through hole 12b'.

The first extending portion 16 and the second extending portion 18 are formed to have the same shape and the same size. A mounting hole 18a for mounting the fastening bolt 14 is formed in the second extending portion 18, and the fastening bolt 14 is mounted to the second main body portion 12' by passing through the mounting hole 18a. The first extending portion 16 is formed with an insertion hole (insertion portion 14b') through which the fastening bolt 14 is inserted. The insertion portion 14b' and the attachment hole 18a are formed to have the same shape and size, and are formed into elongated holes extending along the direction in which the first extension portion 16 and the second extension portion 18 extend.

The pressing portion 20' includes a base 21' formed in a substantially T-shape, and a protrusion 22' that protrudes in the axial direction from the base 21', and a tip 22a' of the protrusion 22' has a curved surface. It is formed in the shape of Moreover, the pressing part 20' is screwed through the through hole 11b' of the first holding part 15, so that the base part 21' is screwed into the inner surface of the first holding part 15 and the first main body part 11' It is configured to be attached to. Similarly, the pressing part 20' is screwed through the through hole 12b' of the second holding part 17, so that the base part 21' is screwed into the inner surface of the second holding part 17 and the second main body part 12 It is configured so that it can be attached to.

As shown in FIG. 10, after inserting the joint member 3 into the cylindrical member 2 (insertion process), the cylindrical body crimping device 1' first holds the position where the cylindrical member 2 and the joint member 3 overlap. In the state surrounded by the section 15 and the second holding section 17, the fastening bolt 14 is inserted into the insertion section 14b' and tightened with the nut 14c, so that it is attached to the outer periphery of the cylindrical member 2 (first attachment step or first attachment step). 2 installation process). Then, as shown in FIG. 11, after or in parallel with the mounting process, the first holding part 15 is tightened until the first extension part 16 and the second extension part 18 come into contact with each other. The pressing parts 20' provided on the second holding part 17 simultaneously press a part of the cylindrical member 2 in the circumferential direction and another part in the circumferential direction different from this, and press the cylindrical member 2 and the other part in the circumferential direction. The joint member 3 is caulked and connected (first caulking process or second caulking process). In addition, if caulking is insufficient only by tightening the nut 14c, the pressing part 20' screwed into the first holding part 15 and the second holding part 17, respectively, can be screwed inward in the radial direction. The shaped member 2 may be further pressed.

Note that, similar to the embodiment described above, the cylindrical member 2 may be caulked while being inserted into the joint member 3.

According to the cylindrical body caulking device 1' having such a configuration, the pressing parts 20' are provided on the first body part 11' and the second body part 12', respectively, and the pressing parts 20' are provided on the cylindrical member 2 and the joint member 3. Since it is possible to caulk at two points at the same time, it has the advantage of not only reducing the work burden during caulking, but also improving work efficiency. Furthermore, when caulking, tightening the nut 14c until the first extension part 16 and the second extension part 18 come into contact serves as a guide for the degree of caulking, so regardless of the operator's skill level, the nut 14c can be properly caulked. It also has the advantage of being able to perform

In addition to the above-described modifications, the cylindrical body crimping device according to the present invention can be modified in various ways without departing from the technical idea of the present invention. For example, in the above-described embodiment, the tip 22a of the protrusion 22 is described as being formed in a curved shape, but the tip 22a of the protrusion 22 may have a shape other than a curved shape, for example. It may have a planar shape or a pointed shape.

Further, in the embodiment described above, the receiving part 30 is described as having the positioning hole part 31 penetrating from the supporting surface that supports the cylindrical member 2 to the opposing surface of the supporting surface, but the present invention is not limited to this. First, the receiving part 30 may not have the positioning hole part 31.

Furthermore, in the embodiment described above, the receiving part 30 was described as being configured to be able to support an area of 90° or more and less than 180° in the circumferential direction of the cylindrical member 2 by surface contact, but it is not limited to this. Instead, the receiving part 30 may support any area of the cylindrical member 2 in the circumferential direction by surface contact.

Furthermore, in the above-described embodiment, the pressing section 20 is described as being configured to be removably attached to the main body section 10, but the present invention is not limited to this, and the pressing section 20 cannot be attached to or detached from the main body section 10. It may be configured as follows.

Furthermore, in the embodiment described above, the pressing part 20 is described as having a hardness greater than that of the cylindrical member 2 and the joint member 3, but the pressing part 20 is not limited to this, and the pressing part 20 is not limited to this. The pressing part 20 may have the same hardness as the cylindrical member 2 and the joint member 3, or the pressing part 20 may have a hardness smaller than that of the cylindrical member 2 and the joint member 3, as long as this function is not inhibited.

Further, in the embodiment described above, the receiving part 30 is described as being configured to be removably attached to the main body part 10, but the present invention is not limited to this, and the receiving part 30 is not detachable from the main body part 10. It may be configured as follows.

Furthermore, in the embodiment described above, the pressing part 20 was described as being configured to be able to move forward and backward with respect to the first main body part 11 in the direction along the direction in which the protruding part 22 protrudes; however, it is not limited to this. Alternatively, the pressing part 20 may not move.

It is clear from the claims that the above modifications are included within the scope of the present invention.

1: Cylindrical body caulking device 2: Cylindrical member 2A: First cylindrical member 2B: Second cylindrical member 3: Joint member 4: Screw member 10: Body portion 11: First body portion 11a: Recessed portion 11b: Penetration Hole 12 : Second body part 12a : Recessed part 12b : Through hole 13a : Shaft part 13b : Shaft part 14 : Fastening part 14a : Fastening bolt 14b : Insertion part 14c : Nut 15 : First holding part 16 : First extending part 17: Second holding part 18: Second extension part 18a: Mounting hole 20: Pressing part 21: Base part 21a: Screw receiving part 22: Projecting part 22a: Tip 30: Receiving part 31: Positioning hole part VL1: Virtual line VL2 :Virtual line

Claims (17)

A joint member is inserted between the first cylindrical member and the second cylindrical member, or the first cylindrical member is inserted into the joint member. and an insertion step of inserting the second cylindrical member,
a first mounting step of mounting a cylindrical body caulking device on the outer periphery of the first cylindrical member or the joint member;
After or in parallel with the first mounting step, press a part of the first cylindrical member or the joint member in the circumferential direction to caulk the first cylindrical member and the joint member. A first caulking step for connecting;
a second mounting step of mounting a cylindrical body caulking device on the outer periphery of the second cylindrical member or the joint member;
After or in parallel with the second mounting step, press a part of the second cylindrical member or the joint member in the circumferential direction to caulk the second cylindrical member and the joint member. A method for connecting cylindrical bodies, comprising: a second caulking step for connecting. In the first crimping step, in a state where a part of the first cylindrical member or the joint member in the circumferential direction is supported by surface contact, a part facing the supported part is pressed, and the part of the first cylindrical member is pressed. and the joint member are caulked and connected,
In the second crimping step, in a state where a part of the second cylindrical member or the joint member in the circumferential direction is supported by surface contact, a part facing the supported part is pressed, and the part of the second cylindrical member is pressed. The cylindrical body connecting method according to claim 1, characterized in that the cylindrical bodies are connected by caulking and the joint member. In the first caulking step, in a state where other circumferential portions of the first cylindrical member or the joint member are supported by surface contact, a portion facing the supported portion is pressed, and the first cylindrical member is further comprising the step of caulking and connecting the member and the joint member,
In the second crimping step, in a state where other circumferential portions of the second cylindrical member or the joint member are supported by surface contact, a portion facing the supported portion is pressed, and the second cylindrical member is The cylindrical body connecting method according to claim 2, further comprising the step of caulking and connecting the member and the joint member. In the first caulking step, a part of the first cylindrical member or the joint member in the circumferential direction and another part in the circumferential direction different from this are simultaneously pressed, and the first cylindrical member and the joint member are pressed together. Connect by caulking the joint members,
In the second caulking step, a part of the second cylindrical member or the joint member in the circumferential direction and another part in the circumferential direction different from this are simultaneously pressed, and the second cylindrical member and the joint member are pressed together. The cylindrical body connecting method according to claim 1, characterized in that the cylindrical bodies are connected by caulking the joint members. A cylindrical body caulking device that caulks and connects a cylindrical member and a joint member inserted into the cylindrical member or through which the cylindrical member is inserted,
a main body that can surround the outer periphery of the cylindrical member or the joint member;
a pressing part capable of pressing a part of the cylindrical member or the joint member in the circumferential direction;
The main body portion is
a first main body portion surrounding a part of the cylindrical member or the joint member;
a second main body portion surrounding another portion of the cylindrical member or the joint member;
a fastening portion that brings the first main body portion and the second main body portion closer to each other or separates them from each other;
A cylindrical body caulking device, characterized in that the fastening portion allows the cylindrical member to be attached to the outer periphery of the cylindrical member or the joint member. The fastening part is
a fastening bolt provided on the tip end side of one of the first main body portion and the second main body portion;
an insertion portion provided on the other tip side of the first main body portion and the second main body portion, through which the fastening bolt is inserted;
The cylindrical body caulking device according to claim 5, further comprising: a nut screwed onto the fastening bolt. The pressing portion is provided on at least one of the first main body portion and the second main body portion,
By tightening the nut with respect to the fastening bolt in a state in which the fastening bolt is inserted through the insertion portion, the first main body portion and the second main body portion are tightened in a direction toward each other, and the cylindrical shape The cylindrical body according to claim 5, wherein the cylindrical body is configured such that the pressing portion presses the member or the joint member to caulk and connect the cylindrical member and the joint member. caulking device. The pressing portion is provided on at least one of the first main body portion and the second main body portion,
By tightening the nut with respect to the fastening bolt in a state in which the fastening bolt is inserted through the insertion portion, the first main body portion and the second main body portion are tightened in a direction toward each other, and the cylindrical shape The cylindrical body according to claim 6, wherein the cylindrical body is configured such that the pressing portion presses the member or the joint member to caulk and connect the cylindrical member and the joint member. caulking device. The pressing part has a protrusion that presses the cylindrical member or the joint member,
The cylindrical body caulking device according to claim 5, wherein the protrusion has a curved tip. The pressing part has a protrusion that presses the cylindrical member or the joint member,
The cylindrical body caulking device according to claim 6, wherein the protrusion has a curved tip. The pressing part has a protrusion that presses the cylindrical member or the joint member,
The cylindrical body caulking device according to claim 7, wherein the protrusion has a curved tip. The pressing part has a protrusion that presses the cylindrical member or the joint member,
The cylindrical body caulking device according to claim 8, wherein the protrusion has a curved tip. further comprising a receiving portion capable of supporting a portion of the cylindrical member or the joint member that faces the pressing portion through surface contact;
By pressing the cylindrical member or the joint member with the pressing part while the cylindrical member or the joint member is supported by the receiving part, the cylindrical member and the joint member are caulked and connected. The cylindrical body caulking device according to any one of claims 5 to 12, characterized in that it is configured to enable. The cylindrical body caulking according to claim 13, wherein the receiving part has a positioning hole that penetrates from a support surface that supports the cylindrical member or the joint member to a surface opposite to the support surface. vessel. The cylindrical member according to claim 13, wherein the receiving portion is configured to be able to support a region of 90° or more and less than 180° in the circumferential direction of the cylindrical member or the joint member by surface contact. Body caulking device. The cylindrical member according to claim 14, wherein the receiving portion is configured to be able to support an area of 90° or more and less than 180° in the circumferential direction of the cylindrical member or the joint member by surface contact. Body caulking device. The cylindrical body caulking device according to any one of claims 5 to 12, wherein the pressing portion is provided on the first body portion and the second body portion, respectively.

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