Ferrule installation device

Abstract

To provide a ferrule installation device that can be further readily manufactured with simple processing and continuously and stably install a ferrule.SOLUTION: A ferrule installation device includes: a cylindrical installation pipe; and a hook spring and a pin disposed inside the installation pipe. The installation pipe includes a long pipe member and a short pipe member having lengths different from each other. The long pipe member and the short pipe member are formed with a pin insertion hole in a position facing each other in their peripheral surfaces. Any one member of the long pipe member and the short pipe member is formed with a long hole for locking the hook spring while projecting part of the hook spring in the position facing each other in their peripheral surfaces. The other member is formed with a notch for positioning the hook spring in a circumferential direction. Any one member of the long pipe member and the short pipe member is inserted into the other member. The ferrule installation device includes a projection in which an end of any one member projects downward from an end of the other member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ferrule installation device for installing ferrules used in stud welding in architectural and civil engineering structures. [Background technology]

[0002] In the construction of architectural and civil engineering structures, a stud welding method is known in which a stud is driven onto a steel beam and welded to connect the steel beam to a concrete slab. When performing stud welding, a ferrule is known to be used on the steel beam as a welding auxiliary material, and the ferrule blocks the weld metal and forms a collar (excess weld) before welding.

[0003] Ferrules are installed one by one directly by workers at the stud welding points on steel beams and the like, but this installation work places a heavy burden on the workers. Therefore, in order to reduce the workload and shorten the work time, for example, Patent Document 1 discloses a ferrule used for stud welding and an installation method thereof. The ferrule installation device described in Patent Document 1 has a mechanism for locking and unlocking the ferrule 3 using a release pin 31 (T-shaped pin) provided between a pipe-shaped rod 9 and a cam device 13. In this configuration, the ferrule 3 passed through the rod 9 is pushed out by a compression spring 29 when the rod 9 is pressed, and then installed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US 2009 / 0126321 A1 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, for example, a ferrule installation device disclosed in Patent Document 1 is used to install a ferrule on a steel beam or the like, and stud welding is performed to drive in a stud, which serves as a connecting member between a concrete slab and the steel beam or the like. However, with the ferrule installation device disclosed in Patent Document 1, complex machining is required to manufacture the cam device 13, such as cutting a slot or groove into the side of a round bar material and forming an oblique T-hole for a T-shaped pin (see Figures 6 to 9 of Patent Document 1, etc.). In other words, because complex machining is required of the member with high precision, there are concerns about increased manufacturing costs and reduced productivity.

[0006] Therefore, the inventors of the present invention have conducted extensive research into a ferrule installation device that can be manufactured using simpler processing and that can reliably install ferrules one by one, with the aim of achieving further improvements in the productivity of stud welding.

[0007] In view of the above circumstances, an object of the present invention is to provide a ferrule installation device that can be easily manufactured using simple processing and that can install ferrules continuously and stably. [Means for solving the problem]

[0008] In order to achieve the above object, according to the present invention, there is provided a ferrule installation device for installing ferrules, comprising a cylindrical installation pipe, and a latch spring and a pin arranged inside the installation pipe, the installation pipe including a long pipe member and a short pipe member of different lengths, the long pipe member and the short pipe member having pin insertion holes formed at opposing positions on their circumferential surfaces, one of the long pipe member and the short pipe member having a long hole formed at opposing positions on its circumferential surface for engaging the latch spring in a protruding state, the other member having a notch formed therein for positioning the latch spring in the circumferential direction, one of the long pipe member and the short pipe member being inserted into the other member, and an end of one member having a protrusion that protrudes downward from the end of the other member.

[0009] The latch spring includes a pin insertion portion located in the center and hook portions extending at a predetermined angle from both sides of the pin insertion portion, and the hook portions may be formed with a first bent portion and a second bent portion that are bent at a predetermined angle from the inside.

[0010] The pin may be inserted into the pin insertion hole with either the long pipe member or the short pipe member inserted into the other member, and may also be inserted into the pin insertion portion, so that the locking spring is engaged inside the installation pipe.

[0011] The latch spring may be a kick spring made of steel wire, and the pin may be a fully threaded bolt having an uneven surface.

[0012] The ferrule installation device may further include a washer that supports the latch spring from below inside the installation pipe, and a cap material that is attached to the lower end of the protrusion. [Effects of the Invention]

[0013] According to the present invention, it is possible to realize a ferrule installation device that can be easily manufactured by simple processing and that can install ferrules continuously and stably. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a schematic front view of the ferrule installation device. [Figure 2] FIG. 2 is an exploded view of the ferrule installation device. [Figure 3] FIG. 4 is a schematic explanatory diagram of a long hole and a pin insertion hole. [Figure 4] FIG. [Figure 5] FIG. 2 is a schematic side view of a ferrule. [Figure 6] FIG. 10 is a schematic explanatory diagram of a method for installing a ferrule. [Figure 7] FIG. 10 is a schematic explanatory diagram of a method for installing a ferrule. [Figure 8] FIG. 10 is a schematic explanatory diagram of a method for installing a ferrule. [Figure 9] FIG. 10 is a schematic explanatory diagram of a method for installing a ferrule. [Figure 10] FIG. 10 is a schematic explanatory view of a ferrule installation device according to a first modified example. [Figure 11] FIG. 10 is an exploded view of a ferrule installation device according to a first modified example. [Figure 12] FIG. 10 is a schematic explanatory diagram according to a second modified example. [Figure 13] FIG. 10 is a schematic explanatory view of a ferrule installation device according to a third modified example. [Figure 14] FIG. 10 is an exploded view of a ferrule installation device according to a third modified example. [Figure 15] FIG. 10 is a schematic explanatory view of a ferrule installation device according to a fourth modified example. [Figure 16] FIG. 10 is an exploded view of a ferrule installation device according to a fourth modified example. [Figure 17] FIG. 10 is a schematic explanatory diagram according to a fifth modified example. [Figure 18] FIG. 13 is a schematic explanatory diagram according to a sixth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0016] <Overall configuration of the ferrule installation device> Fig. 1 is a schematic front view of a ferrule installation device 1 according to an embodiment of the present invention. Fig. 2 is an exploded view of the ferrule installation device 1 according to an embodiment of the present invention, with (a) being a schematic front view of each component and (b) being a schematic side view of each component. That is, Fig. 1 shows a state in which the multiple components shown in Fig. 2 are assembled. Fig. 1 also shows a state in which a ferrule 5 has been inserted into the ferrule installation device 1.

[0017] As shown in Fig. 1, a ferrule installation device 1 according to an embodiment of the present invention includes a long pipe member 10 having a hollow interior and a short pipe member 20 having a hollow interior. The long pipe member 10 and the short pipe member 20 are combined to form a cylindrical installation pipe 2. A latch spring 30 and a pin 40 for fixing the latch spring 30 are disposed inside the installation pipe 2. The long pipe member 10 and the short pipe member 20 are preferably made of a corrosion-resistant metal material, such as aluminum or stainless steel.

[0018] As shown in FIGS. 2(a) and 2(b), the long pipe member 10 is formed with elongated holes 14 for engaging the latch springs 30 and pin insertion holes 16a (16) for inserting the pins 40. The elongated holes 14 are formed at positions (i.e., two locations) facing each other on the circumferential surface of the cylindrical pipe. Similarly, the pin insertion holes 16a are formed at positions (i.e., two locations) facing each other on the circumferential surface of the cylindrical pipe. The positional relationship between the elongated holes 14 and the pin insertion holes 16a is designed based on the shape of the pin 40, and for example, the line connecting the opposing elongated holes 14 and the line connecting the opposing pin insertion holes 16a may be configured to intersect at a predetermined angle in a plan view.

[0019] 2(a), pin insertion holes 16b (16) are formed in opposing positions (i.e., two locations) on the circumferential surface of the short pipe member 20. The pin insertion hole 16b is formed so as to at least partially overlap with the pin insertion hole 16a in the installation pipe 2, which is a combination of the long pipe member 10 and the short pipe member 20, and the pin insertion hole 16 is formed with the pin insertion holes 16a and 16b overlapping. Also, as shown in FIG. 2(b), a notch 22 is formed in the upper end of the short pipe member 20 to position the latch spring 30 in the circumferential direction.

[0020] In the configuration according to this embodiment, the diameter W1 of the long pipe member 10 is larger than the diameter W2 of the short pipe member 20 (i.e., W1 > W2). The short pipe member 20 is then inserted into the long pipe member 10, and the latching spring 30 and pin 40 are fixed therein. Specifically, the latching spring 30 is fixed inside the long pipe member 10 by inserting the pin 40 into the pin insertion hole 16 while the latching spring 30 is latched in the long hole 14. The pin 40 may be, for example, a fully threaded bolt having an uneven surface, and may be fixed by clamping the latching spring 30 with a nut or the like from the inside of the pin insertion hole 16 of the fully threaded bolt. In this case, the latching spring 30 is fixed in the desired position.

[0021] Furthermore, when the short pipe member 20 is inserted into the long pipe member 10, the lower end of the short pipe member 20 protrudes from the lower end of the long pipe member 10 as a protrusion 24. In this state, a locking spring 30 and a pin 40 are fixed inside. The protrusion 24 is configured so that it can be pushed into the long pipe member 10 in accordance with the elastic deformation of the locking spring 30.

[0022] <Position and configuration of elongated holes and pin insertion holes> 3A and 3B are schematic explanatory diagrams of the long holes 14 and the pin insertion holes 16, where (a) is an explanatory diagram of the long pipe member 10 and (b) is an explanatory diagram of the short pipe member 20. For the sake of explanation, Fig. 3 also shows a top view of each pipe member.

[0023] As shown in FIG. 3(a), the pin insertion holes 16a are formed at opposing positions (i.e., two locations) on the cylindrical circumferential surface of the long pipe member 10. Since a substantially cylindrical pin 40 is inserted into the pin insertion holes 16a, the pin insertion holes 16a are formed in a substantially circular shape. The long holes 14 are formed at opposing positions (i.e., two locations) on the cylindrical circumferential surface of the long pipe member 10. Since portions of the hook portions (second bent portions 36 of the hook portions 34, described later) formed on both side portions of the latch spring 30 are engaged in a protruding state in the long holes 14, the long holes 14 are formed in a substantially elliptical shape with a predetermined length in the vertical direction and a major axis in the longitudinal direction. The detailed shape and configuration of the latch spring 30 will be described later with reference to the drawings.

[0024] In the long pipe member 10, the line connecting the opposing elongated holes 14 and the line connecting the opposing pin insertion holes 16a are not perfectly perpendicular in plan view (see the dashed line in the figure). For example, the line connecting the pin insertion holes 16a is tilted approximately 10° from the line connecting the elongated holes 14 to the line connecting the pin insertion holes 16a. This is due to the shape of the latch spring 30 (described later). The hook portion of the latch spring 30 (hook portion 34) extends at a position offset from the center of the coil portion of the latch spring 30 (pin insertion portion 32), and this offset is taken into consideration. By forming a hole whose center line is a line tilted approximately 10° from the line connecting the pin insertion holes 16a to the line connecting the pin insertion holes 16a, it is possible to drill the hole in a single process. In other words, the pin insertion hole 16 is optimally designed based on the positional relationship of the hook portions on both sides of the latch spring 30.

[0025] 3(b), the pin insertion holes 16b are formed at opposing positions (i.e., two locations) on the circumferential surface of the short pipe member 20. The pin insertion holes 16b are configured so that the pins 40 are loosely fitted into the holes as the protruding portions 24 of the short pipe member 20 are pressed into the long pipe member 10, and are formed in a generally elliptical shape with a major axis in the vertical direction. Furthermore, notches 22 are formed at the upper end of the short pipe member 20 at opposing positions (i.e., two locations) in the circumferential direction of the upper end to position the latch spring 30 in the circumferential direction.

[0026] In the short pipe member 20, the line connecting the opposing pin insertion holes 16b and the line connecting the opposing notches 22 are not perfectly perpendicular in plan view (see the dashed line in the figure). For example, the line connecting the notches 22 is tilted approximately 10° from the line connecting the pin insertion holes 16b to the line connecting the pin insertion holes 16b. This is due to the shape of the latch spring 30 (described later). The hook portion of the latch spring 30 (hook portion 34) extends at a position offset from the center of the coil portion of the latch spring 30 (pin insertion portion 32), and this offset is taken into consideration. By forming a hole whose center line is a line tilted approximately 10° from the line connecting the pin insertion holes 16b to the line connecting the pin insertion holes 16b, it is possible to drill the hole in a single process. In other words, the pin insertion holes 16 and the notches 22 are suitably designed based on the positional relationship of the hook portions on both sides of the latch spring 30.

[0027] <Latch spring configuration> 4 is a schematic explanatory diagram of the latch spring 30, where (a) is a front view of the latch spring 30 and (b) is a side view of the latch spring 30. As shown in FIG. 4, the latch spring 30 includes a pin insertion portion 32 located in the center and hook portions 34 (34a, 34b) extending from both sides of the pin insertion portion 32 at a predetermined angle, and is configured as, for example, a kick spring that undergoes elastic deformation. The hook portion 34 extends diagonally upward to the side of the pin insertion portion 32, and is formed with a first bent portion 35 (35a, 35b) and a second bent portion 36 (36a, 36b) in that order from the inside. The bending angles of the first bent portion 35 and the second bent portion 36 are arbitrary. For example, the first bent portion 35 is formed so as to bend inward by approximately 30° relative to the steel wire material extending from the pin insertion portion 32, and the second bent portion 36 is formed so as to bend inward by approximately 90° relative to the steel wire material extending from the first bent portion 35.

[0028] In the present invention, for example, by utilizing the elastic deformation of a conventional kick spring, the width B1 of the pin insertion portion 32 is designed to be smaller than both the inner diameter W1 of the long pipe member 10 and the inner diameter W2 of the short pipe member 20. In addition, the distance B2 between the first bent portions 35a and 35b is designed to be larger than both the inner diameter W1 of the long pipe member 10 and the inner diameter W2 of the short pipe member 20. With this configuration, the portion of the hook portion 34 from the first bent portion 35 to the second bent portion 36 is pressed against the inner peripheral wall of the long hole 14 of the long pipe member 10 by utilizing the elastic deformation of the kick spring, and moves in and out of the long hole 14.

[0029] 4 is used, the latching spring 30 is placed inside the long pipe member 10, and the latching spring 30 is latched in the long hole 14, and a pin 40 is inserted into the pin insertion hole 16, thereby fixing the latching spring 30 inside the long pipe member 10. The pin 40 is, for example, a fully threaded bolt with an uneven surface, and inserting the pin 40 into the pin insertion portion 32 prevents the latching spring 30 from moving in the longitudinal direction of the pin 40. The pin 40 is loosely fitted into the pin insertion hole 16b, and is configured so that when the protrusion 24 of the short pipe member 20 is pushed into the long pipe member 10 in accordance with elastic deformation of the latching spring 30, the pin 40 also moves along the pin insertion hole 16b (see FIG. 1).

[0030] <Ferrule 5 configuration> Fig. 5 is a schematic side view of the ferrule 5. As shown in Fig. 5, the ferrule 5 is a hollow, approximately cylindrical member in which portions with two different inner diameters are connected. If the overall height of the ferrule 5 is M, the range from the top end to a vertical length M1 is configured to have a small diameter D1, and the range from the bottom end excluding this range and having a vertical length M2 (= M-M1) is configured to have a large diameter D2.

[0031] The shape and dimensions of the ferrule 5 are designed as desired to protect the arc and weld from the atmosphere and to keep the temperature of the weld during stud welding. The ferrule 5 is made of heat-resistant porcelain, for example, and functions as a mold for the weld metal when the arc is generated during stud welding, and is configured so that it can be easily destroyed or removed by impact or vibration.

[0032] <Ferrule installation method> Next, a method for installing the ferrule 5 using the ferrule installation device 1 according to this embodiment will be described. Figures 6 to 9 are schematic explanatory views of the method for installing the ferrule 5, and are front views sequentially showing the installation status of the ferrule 5.

[0033] As shown in Fig. 6, first, the ferrule 5 is inserted into the ferrule installation device 1. The ferrule 5 is inserted, for example, from the upper end of the installation pipe 2. A plurality of ferrules 5 may be inserted, and here, a case where two ferrules 5 (a first ferrule 5a and a second ferrule 5b) are inserted is illustrated (see Figs. 7 to 9).

[0034] As shown in Figure 7, among the ferrules 5 inserted into the installation pipe 2, the lowest ferrule 5 (hereinafter also referred to as the first ferrule 5a) is caught and locked by the second bent portion 36 of the latch spring 30, which protrudes outward (exposed) from the long hole 14 of the long pipe member 10 at the boundary between the small diameter D1 portion and the large diameter D2 portion of the inner circumference of the first ferrule 5a.

[0035] Then, as shown in Figure 8, the protruding portion 24 (not shown in Figure 8) of the short pipe member 20 is pressed against the surface on which the ferrule is to be installed (for example, the surface of a steel beam, etc.), and the ferrule 5 is dropped downward. At this time, the lower end of the long pipe member 10 slides downward. As a result, the position of the long hole 14 of the long pipe member 10 shifts downward, and the first bent portion 35 and second bent portion 36 of the hook portion 34 fit within the long pipe member 10, causing the ferrule 5 to drop.

[0036] 9, when the ferrule installation device 1 is pulled upward from the ferrule installation surface, the force of the latching spring 30 pushes the short pipe member 20 downward, the long pipe member 10 returns to its upper position, and the first bent portion 35 and the second bent portion 36 of the hook portion 34 of the latching spring 30 also return to their protruding states from the elongated hole 14. At this time, only the first ferrule 5a is installed on the ferrule installation surface, and the second ferrule 5b falls down to the elongated hole 14, restricting the protrusion of the hook portion 34, and the second ferrule 5b is pressed from the inside by the hook portion 34, keeping it in place.

[0037] The vertical distance C1 (see FIG. 4) between the first bent portion 35 and the second bent portion 36 of the latch spring 30 is preferably designed to be approximately the same dimension as the height M1 (see FIG. 5) of the area of ​​the ferrule 5 where the small diameter D1 is located. This allows a wide area of ​​the hook portion 34 to abut against the inside of the second ferrule 5b when the ferrules are installed. Designing the dimensions in this way makes it possible to drop and install the ferrules 5 one by one reliably, as described above.

[0038] <Action and effect> As described above, the ferrule installation device 1 according to this embodiment includes a long pipe member 10, a short pipe member 20, a latch spring 30, and a pin 40. The ferrule installation device 1 is a pipe-shaped steel member, and is manufactured using a simple process in which the installation pipe 2, which is made up of the long pipe member 10 and the short pipe member 20, is processed to form the long hole 14, the pin insertion hole 16, and the notch 22, and then the latch spring 30 is disposed inside the installation pipe 2. This allows for manufacturing without requiring more advanced processing techniques than conventional methods, thereby reducing costs. In particular, the long hole 14, the pin insertion hole 16, and the notch 22 can be easily processed by arranging them so that two opposing holes and notches are located on the same center line.

[0039] Furthermore, in the ferrule installation device 1 according to this embodiment, the latch spring 30 is configured to include a centrally located pin insertion portion 32 and hook portions 34 extending from both sides of the pin insertion portion 32. The hook portions 34 are formed with a first bent portion 35 and a second bent portion 36. The latch spring 30 is designed to achieve a predetermined dimensional relationship between the ferrule installation device 1 and the ferrule 5. Additionally, a notch 22 is formed in the short pipe member 20 so that the latch spring 30 can be fixed in a desired position. By optimizing the configuration and design of the installation pipe 2 and the latch spring 30, the ferrules 5 can be installed one by one stably by dropping only the first ferrule 5a and reliably holding the second ferrule 5b in a predetermined position. In other words, by repeating the steps described above with reference to FIGS. 6 to 9, multiple ferrules 5 can be installed continuously and stably.

[0040] Although an example of an embodiment of the present invention has been described above, the present invention is not limited to the illustrated embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the ideas described in the claims, and it is understood that these naturally fall within the technical scope of the present invention. Modifications of the present invention will be described below with reference to the drawings. In the following description, components having the same functional configuration as those in the above embodiment will be illustrated with the same reference numerals, and their description may be omitted.

[0041] <First Modification> In the above embodiment, the ferrule installation device 1 has been illustrated and described as including the long pipe member 10, the short pipe member 20, the latch spring 30, and the pin 40, but it may also include a washer and a cap member. Fig. 10 is a schematic explanatory diagram of a ferrule installation device 1a according to a first modified example of the present invention. Fig. 11 is an exploded view of the ferrule installation device 1a according to the first modified example.

[0042] The ferrule installation device 1a according to this modification includes a washer 50 and a cap member 60 in addition to the components described in the above embodiment. As shown in FIGS. 10 and 11 , the washer 50 is a generally disk-shaped member having a diameter slightly smaller than the inner diameter of the short pipe member 20 so as to fit inside the short pipe member 20, and has a small-diameter circular hole 51 in its center. The washer 50 is located at the upper end of the cap member 60 and is arranged to close the internal space inside the installation pipe 2. When the short pipe member 20 slides upward inside the long pipe member 10, the presence of the washer 50 at the upper end of the cap member 60 supports the latch spring 30 from below, preventing it from shifting. For example, the lower part of the pin insertion portion 32 may be supported by fitting into the circular hole 51.

[0043] The cap material 60 is attached to the lower end of the protruding portion 24 of the short pipe member 20, and comprises an in-pipe insertion portion 61 and a cushion portion 62. The in-pipe insertion portion 61 is a substantially cylindrical member with an outer diameter substantially the same as the inner diameter of the short pipe member 20, and the cushion portion 62 is a substantially disk-shaped member with an outer diameter substantially the same as the outer diameter of the short pipe member 20. The cap material 60 is constructed by integrating the in-pipe insertion portion 61 and the cushion portion 62, and is preferably made of an elastic material such as rubber.

[0044] According to the ferrule installation device 1a of this modified example, when the protruding portion 24 of the short pipe member 20 is pressed against the surface on which the ferrule is to be installed (for example, the surface of a steel beam), the short pipe member 20 to which the cap member 60 is attached slides upward, and the presence of the cap member 60 prevents the short pipe member 20 from moving too far upward. In addition, the return (elastic deformation) of the latch spring 30 as the short pipe member 20 is pushed back is smooth, suppressing wear of the spring function. Furthermore, the pin insertion portion 32 of the latch spring 30 abuts against the washer 50, thereby preventing the latch spring 30 from moving inside the installation pipe 2.

[0045] <Second Modification> In the first modified example, the ferrule installation device 1a includes the washer 50 and the capping material 60, but the present invention is not limited to this configuration. Fig. 12 is a schematic explanatory diagram of a second modified example of the present invention, illustrating various modified examples of the capping material 60.

[0046] As shown in FIG. 12(a), cap member 60a may be formed by joining a metal pipe insertion portion 61a with a central threaded hole and a rubber or nylon cushion portion 62a located below it with a head screw 63, forming a groove 64a. As shown in FIGS. 12(b) to 12(e), cap members 60b to 60e may be formed by machining a member made of metal, hard urethane, nylon bar, or the like to integrate a washer and cap member. As shown in FIGS. 12(b) to 12(d), cap members 60b to 60d have grooves 64b to 64d of various shapes formed on their upper portions. Groove 64b has a substantially rectangular shape in side view, groove 64c has a curved, bowl-like shape in side view, and groove 64d has a substantially triangular shape in side view. Furthermore, as shown in FIG. 12(e), cap member 60e has a through-hole 65 penetrating vertically.

[0047] <Third Modification> Furthermore, in the above embodiment, the long pipe member 10 and the short pipe member 20 that constitute the installation pipe 2 are described as being configured such that the inner diameter W1 of the long pipe member 10 is larger than the inner diameter W2 of the short pipe member 20 (i.e., W1 > W2), but the present invention is not limited to this.

[0048] Fig. 13 is a schematic explanatory diagram of a ferrule installation device 1b according to a third modified example of the present invention. Fig. 14 is an exploded view of the ferrule installation device 1b according to the first modified example, where (a) is a schematic front view of each member and (b) is a schematic side view of each member. For the sake of explanation, Fig. 14 also shows a top view of each pipe member.

[0049] In the ferrule installation device 1b according to this modification example, the inner diameter W1 of the long pipe member 10 is configured to be smaller than the inner diameter W2 of the short pipe member 20 (that is, W1 < W2). That is, the long pipe member 10 is inserted into the short pipe member 20, and the latching spring 30 and the pin 40 are fixed inside in that state. At that time, the lower end portion of the short pipe member 20 protrudes from the lower end portion of the long pipe member 10 as the protruding portion 24. As shown in FIG. 14, in the configuration according to this modification example, a long hole 14 and a pin insertion hole 16 are formed in the short pipe member 20, and a pin insertion hole 16 and a notch 22 are formed in the long pipe member 10.

[0050] Also, the configuration of the latching spring 30a in this modification example is generally the same as that in the above embodiment, but the extending direction of the hook portion 34 is different, and it extends obliquely downward to the side of the pin insertion portion 32. And, similar to the above embodiment, the first bending portion 35 (35a, 35b) and the second bending portion 36 (36a, 36b) are formed in order from the inside thereof.

[0051] In the ferrule installation device 1a according to this modification example, similar to the above embodiment, a plurality of ferrules 5 can be continuously and stably installed. Further, by configuring the inner diameter W1 of the long pipe member 10 to be smaller than the inner diameter W2 of the short pipe member 20, cost reduction can be achieved compared to the case where the inner diameter W1 of the long pipe member 10 is configured to be larger than the inner diameter W2 of the short pipe member 20.

[0052] <Fourth Modification Example> FIG. 15 is a schematic explanatory view of a ferrule installation device 1c according to a fourth modification example of the present invention. Further, FIG. 16 is an exploded view of the ferrule installation device 1c according to the fourth modification example, (a) is a schematic front view of each member, and (b) is a schematic side view of each member. For the sake of explanation, the top views of each pipe member are also shown in FIG. 16.

[0053] In the ferrule installation device 1c according to this modification example, the inner diameter W1 of the long pipe member 10 is configured to be smaller than the inner diameter W2 of the short pipe member 20 (that is, W1 < W2). That is, the long pipe member 10 is inserted into the short pipe member 20, and the latching spring 30 and the pin 40 are fixed inside in that state. At that time, the lower end portion of the short pipe member 20 protrudes from the lower end portion of the long pipe member 10 as the protruding portion 24.

[0054] In addition, the arrangement configurations of the latching spring 30, the long hole 14, and the pin insertion hole 16 in this modification example are generally the same as those in the above embodiment. In the ferrule installation device 1c according to this modification example, similar to the above embodiment, a plurality of ferrules 5 can be continuously and stably installed. Furthermore, similar to the above third modification example, cost reduction can be achieved.

[0055] <Fifth Modification Example> Also, in the above embodiment, the latching spring 30 includes a pin insertion portion 32 located at the center and hook portions 34 extending to both side portions thereof, and has been illustrated and described for the case of being manufactured by bending a kick spring made of, for example, a steel wire rod, but is not limited thereto. FIG. 17 is a schematic explanatory view according to a second modification example of the present invention, and illustrates various modification examples of the latching spring 30.

[0056] As the latching spring 30, for example, a leaf spring having a cross-sectional shape shown in FIGS. 17(a) to (c) may be used. Even in that case, similar to the above embodiment, it is desirable to include a central pin insertion portion 32 and hook portions 34 extending to both side portions thereof. Also, as shown in FIGS. 17(c) and (d), the first bent portion 35 and the second bent portion 36 of the hook portion 34 may be formed in a curved shape having a curvature in a cross-sectional view.

[0057] <Sixth Modification Example> Also, in the above embodiment, the pin 40 has been described as, for example, a full-thread bolt having irregularities on the surface, but is not limited thereto. FIG. 18 is a schematic explanatory view according to a sixth modification example of the present invention, and illustrates various modification examples of the pin 40.

[0058] As shown in Figure 18(a), the pin 40 may be a parallel pin made of a general round bar. Alternatively, as shown in Figure 18(b), it may be a grooved spring pin. Alternatively, as shown in Figure 18(c), it may be a slip-stop grooved pin. Alternatively, as shown in Figure 18(d), it may be a slip-stop grooved full-threaded pin. Alternatively, as shown in Figure 18(e), it may be a slip-stop grooved full-threaded screw. [Industrial Applicability]

[0059] The present invention can be applied to a ferrule installation device for installing ferrules used in stud construction (stud welding) in architectural and civil engineering structures and the like. [Explanation of symbols]

[0060] 1...Ferrule installation device 1a to 1c...Ferrule installation device (pertaining to modified examples) 5...Ferrule 10...Long pipe member 14…Long hole 16...Pin insertion hole 20...Short pipe member 22...Notch 24...Protrusion 30...Latching spring 32...Pin insertion part 34...Hook part 35...First bending part 36…Second bending part 40...pin 50...washer 60...Cap material 60a to 60e... (Modifications) Cap materials

Claims

1. A ferrule installation device for installing a ferrule, A cylindrical installation pipe and a latch spring and a pin disposed inside the installation pipe, The installation pipe includes a long pipe member and a short pipe member having different lengths, The long pipe member and the short pipe member have pin insertion holes formed at positions facing each other on their circumferential surfaces, One of the long pipe member and the short pipe member has a long hole formed at a position facing each other on the circumferential surface, for engaging a part of the latch spring in a protruding state, and the other member has a notch formed to position the latch spring in the circumferential direction, A ferrule installation device characterized in that either the long pipe member or the short pipe member is inserted into the other member, and the end of either member has a protrusion that protrudes downward from the end of the other member.

2. The latch spring includes a pin insertion portion located at the center and hook portions extending from both sides of the pin insertion portion at a predetermined angle, 2. The ferrule installation device according to claim 1, wherein the hook portion is formed with a first bent portion and a second bent portion, which are bent at a predetermined angle from the inside.

3. 3. The ferrule installation device according to claim 2, wherein the pin is inserted into the pin insertion hole and into the pin insertion portion when one of the long pipe member and the short pipe member is inserted into the other member, and the locking spring is engaged inside the installation pipe.

4. The ferrule installation device according to any one of claims 1 to 3, wherein the latch spring is a kick spring made of a steel wire material, and the pin is a fully threaded bolt having an uneven surface.

5. The ferrule installation device according to any one of claims 1 to 4, further comprising: a washer that supports the latch spring from below inside the installation pipe; and a cap material that is attached to the lower end of the protrusion.

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