JP6397835B2 - Hydraulic expansion machine - Google Patents

Description

  The present invention relates to a hydraulic pipe expander for locally expanding a region near an end of a piping member, for example, for joining with a joint member.

  For example, in order to locally expand a region in the vicinity of an end portion of a piping member made of stainless steel, a hydraulic tube expander has been conventionally used. The local pipe expansion in the region in the vicinity of the end of the pipe member is mainly performed for joining with the pipe joint member.

  The configuration of a hydraulic pipe expander for a stainless steel pipe that has been actually manufactured or sold by the applicant of the present invention will be described with reference to FIGS.

  FIG. 15 is a front view of a conventional hydraulic pipe expander 50, and FIG. 16 is a side view of the conventional hydraulic pipe expander 50. FIG. 17 is a side view showing a state in which an attachment 70 corresponding to the diameter of the pipe to be expanded is connected to the conventional hydraulic pipe expander 50, and FIG. 18 is a schematic side view showing the configuration of the attachment 70. .

  As shown in FIGS. 15 to 17, a conventional hydraulic pipe expander 50 includes a hydraulic system 51 that converts electrical energy into hydraulic pressure, a main body case 52 that houses the hydraulic system 51, and a part of the outer surface of the main body case 52. An exposed hydraulic pipe 53 and a pipe expansion action part 54 connected to the hydraulic pipe 53 are provided. The pipe expansion action part 54 consists of a substantially cylindrical member, and is called the hydraulic cylinder.

  On the upper surface of the main body case 52, a switch portion 55 for controlling on / off of the activation of the hydraulic system 51 is provided. When the switch unit 55 turns on the activation of the hydraulic system 51, the hydraulic pressure is applied to the pipe expansion unit 54 via the hydraulic pipe 53.

  When the hydraulic pipe expander 50 is used, as shown in FIG. 17, an adapter 60 corresponding to the diameter of the pipe to be expanded is attached to the pipe expansion section 54 after an adapter 60 that fits as necessary is attached to the pipe expansion section 54. Screwed into the connecting portion (piston rod).

  When the hydraulic pressure is supplied to the pipe expanding portion 54 via the hydraulic pipe 53 in a state where the attachment 70 is screwed, the attachment 70 is temporarily deformed so that the hydraulic pressure is applied to the attachment 70 and the pipe is expanded. Occurs.

  More specifically, as shown in FIG. 18, the attachment 70 has a flange portion 71 fixed to the pipe expanding portion 54, and extends through the flange portion 71 so that when the hydraulic pressure is applied, the pipe expanding portion 54 is attached. And a guide shaft 72 that retracts and moves. The guide shaft 72 is provided with an opposing flange portion 73 that faces the flange portion 71, and an elastically deformable resin ring 74 is provided between the flange portion 71 and the opposing flange portion 73.

  When the hydraulic pressure is applied to the attachment 70, the guide shaft 72 is retracted and the resin ring 74 is compressed between the flange portion 71 and the opposing flange portion 73 and deformed so as to swell toward the outer diameter side. The deformation force is used as a force for expanding the pipe.

  Various methods for connecting the expanded pipe to the joint member are known. An example is described in FIGS. 10 and 11 of Patent Document 1 (sixth embodiment in Patent Document 1).

JP2002-071065

  The hydraulic pipe expander 50 described above is highly appreciated by buyers. However, due to the total weight of 20 kg and the large hydraulic system 51, it was extremely difficult to bring it into a narrow work site.

  The present inventor has intensively studied to develop a hydraulic pipe expander that can be effectively used even in a narrow work site. In particular, the pipe expansion part 54 was separated from the hydraulic system 51 part, and examination was repeated in the direction of bringing only the pipe expansion part 54 into a narrow work site.

  The present invention has been created based on the above findings. An object of the present invention is to provide a hydraulic pipe expander that can be effectively used even in a narrow work site.

  The present invention provides a hydraulic system that converts electrical energy into hydraulic pressure, a main body case that accommodates the hydraulic system, a hydraulic pipe connection port provided on an outer surface of the main body case, and activation / deactivation of the hydraulic system. A switch part to be controlled, and a switch wiring connection port connected to the switch part and provided on the outer surface of the main body case, and in a state where a hydraulic pipe is connected to the hydraulic pipe connection port, When the switch unit turns on the activation of the hydraulic system, the switch unit includes a main body unit configured to supply hydraulic pressure into the hydraulic pipe, and directly connected to the hydraulic pipe connection port It is possible to connect directly to the switch wiring connection port with a hydraulic pipe that can be connected via an extension pipe, and can also be connected via an extension wiring. Switch wiring that is possible, a switch operation unit capable of operating on / off control of the switch unit of the main body unit via the switch wiring and the switch wiring connection port of the main body unit, and a pipe to be expanded A connection portion for connecting an attachment corresponding to the diameter, and when hydraulic pressure is supplied to the hydraulic pipe in a state where the attachment is connected to the connection portion, the hydraulic pressure is applied to the attachment. And a pipe expanding part characterized by causing temporary deformation of the attachment for expanding the pipe, the pipe expanding part having a gripping part and a pedestal part for stable placement. The main body portion has a recess capable of accommodating the pedestal portion of the expanded tube portion, and the pedestal portion of the expanded tube portion is held in the recessed portion of the main body portion. The retainer, it is a hydraulic tube expanding machine, characterized in that provided on at least one of the expanded pipe portion and the main body portion.

  According to the present invention, by using the extension pipe and the extension wiring in combination, the pipe expansion part can be separated from the main body part (hydraulic system part) and only the pipe expansion part can be brought into a narrow work site. It can be used effectively even in narrow work sites. On the other hand, without using the extension pipe and extension wiring, if the hydraulic pipe is directly connected to the hydraulic pipe connection port, the switch wiring is directly connected to the switch wiring connection port, and the pedestal is accommodated in the recess, the conventional hydraulic type The same usage as the pipe expander 50 is possible. That is, according to the present invention, it is possible to provide a two-way usage mode of a separated type and an integrated type with a single hydraulic pipe expander.

  Furthermore, according to this invention, the holder for hold | maintaining the state by which the base part is accommodated in the recessed part is provided in at least one of the pipe expansion part and the main-body part. This is effective when an adapter or attachment is attached to the pipe expansion portion or the connection portion by screwing. Because, in the screwing work (and screw removing work) for the pipe expansion part and the connection part, if the pedestal part is not sufficiently fixed to the concave part, the pedestal part will rise up during the work and it will be difficult to perform the work. This is because the presence of the holder prevents such a situation.

  Alternatively, the present invention provides a hydraulic system that converts electrical energy into hydraulic pressure, a main body case that accommodates the hydraulic system, a hydraulic pipe connection port provided on an outer surface of the main body case, and activation / deactivation of the hydraulic system. A switch part that controls the off state, and a switch wiring connection port that is connected to the switch part and provided on the outer surface of the main body case, and a state in which a hydraulic pipe is connected to the hydraulic pipe connection port When the switch unit turns on the activation of the hydraulic system, the main body unit is configured to supply the hydraulic pressure into the hydraulic pipe, and directly to the hydraulic pipe connection port A hydraulic pipe that can be connected and can also be connected via an extension pipe, and can be directly connected to the switch wiring connection port and via an extension wiring. A switch wiring that can be connected, a switch operating unit capable of operating on / off control of the switch unit of the main body unit via the switch wiring and the switch wiring connection port of the main body unit, and a pipe expansion target A connection portion for connecting an attachment corresponding to the diameter of the pipe, and when hydraulic pressure is supplied to the hydraulic pipe in a state where the attachment is connected to the connection portion, the hydraulic pressure is applied to the attachment. Is further provided with a tube expansion part characterized by causing temporary deformation of the attachment that expands the pipe, and the tube expansion part includes a gripping part, a pedestal part for stable placement, The main body has a recess that can accommodate the pedestal of the tube expansion portion, and a slide rail forming portion is provided on a part of the upper surface of the periphery of the recess. The pedestal portion of the expanded pipe portion against said recess of said body portion, it is a hydraulic tube expanding machine, characterized in that is adapted to be accommodated by sliding movement.

  Also according to the present invention, by using the extension pipe and the extension wiring together, the pipe expansion section can be separated from the main body section (hydraulic system section) and only the pipe expansion section can be brought into a narrow work site. It can be used effectively at the work site. On the other hand, without using the extension pipe and extension wiring, if the hydraulic pipe is directly connected to the hydraulic pipe connection port, the switch wiring is directly connected to the switch wiring connection port, and the pedestal is accommodated in the recess, the conventional hydraulic type The same usage as the pipe expander 50 is possible. That is, according to the present invention, it is possible to provide a two-way usage mode of a separated type and an integrated type with a single hydraulic pipe expander.

  Furthermore, according to this invention, the slide rail formation part is provided in the upper surface of the periphery of a recessed part, and a base part is accommodated by slidingly moving with respect to a recessed part. This is effective when an adapter or attachment is attached to the pipe expansion portion or the connection portion by screwing. This is because the slide rail forming part suppresses the upward lifting of the pedestal part, and the pedestal part floats during the screwing work (and the screw removing work) to the expanded pipe part and the connecting part, so that it is difficult to perform the work. It will prevent you.

  Also in the latter invention, it is preferable that a holder for holding a state in which the pedestal part of the pipe expansion part is accommodated in the concave part of the main body part is provided in at least one of the pipe expansion part and the main body part. In this case, even when a slide movement force is generated in the pipe expansion part due to some undesired factor, the pipe expansion part is prevented from actually sliding and coming off the recess. For example, the holder is a retaining pin inserted into a through hole provided in the slide rail portion and a bottomed hole or through hole provided in the pedestal portion so as to correspond to each other. Even with such a simple holder, it is possible to sufficiently obtain the effect of preventing the tube-expanded portion from coming out of the recess.

  It is preferable that the grip part of the pipe expansion part is formed as a grip handle extending in a direction substantially parallel to the pedestal part. In this case, gripping is easy and stable, and space is saved even during storage. In this case, the switch operation unit is preferably provided as a pressing operation unit in a direction substantially parallel to the pedestal unit at the tip of the grip handle. Such an aspect is remarkably superior in that the switch operation unit is less likely to be erroneously operated according to the actual verification by the present inventors.

  Moreover, it is preferable that the hydraulic pipe connection port of the main body portion is provided so as to be bent and extend in a substantially horizontal direction after extending upward. Such an embodiment is remarkably superior in that it saves space when stored.

  In terms of ease of attachment / detachment, the hydraulic pipe connection port and the hydraulic pipe are preferably one-touch detachable. Similarly, the hydraulic pipe connection port and the extension pipe and the extension pipe and the hydraulic pipe are also one-touch detachable. The formula is preferred.

  About an attachment, the conventional thing can be diverted. A typical attachment includes a flange portion fixed to the connection portion of the pipe expansion portion, and a guide shaft that extends through the flange portion and retracts relative to the connection portion of the pipe expansion portion when hydraulic pressure is applied. I have. The guide shaft is provided with an opposing flange portion facing the flange portion, and an elastically deformable resin ring is provided between the flange portion and the opposing flange portion so that hydraulic pressure is applied to the attachment. Then, the guide shaft is retracted and the resin ring is compressed between the flange portion and the opposing flange portion and deformed so as to expand to the outer diameter side, and the deformation force is used as a force for expanding the pipe. It is like that.

  In addition, the present invention is a hydraulic pipe expander set including the hydraulic pipe expander having any of the above-described features, one or more attachments, an extension pipe, and an extension wiring.

  In this case, it is preferable that the extension pipe and the extension wiring are at least partially integrated.

  According to the present invention, by using the extension pipe and the extension wiring in combination, the pipe expansion part can be separated from the main body part (hydraulic system part) and only the pipe expansion part can be brought into a narrow work site. It can be used effectively even in narrow work sites. On the other hand, without using the extension pipe and extension wiring, if the hydraulic pipe is directly connected to the hydraulic pipe connection port, the switch wiring is directly connected to the switch wiring connection port, and the pedestal is accommodated in the recess, the conventional hydraulic type The same usage as the pipe expander 50 is possible. That is, according to the present invention, it is possible to provide a two-way usage mode of a separated type and an integrated type with a single hydraulic pipe expander.

  Furthermore, according to this invention, the holder for hold | maintaining the state by which the base part is accommodated in the recessed part is provided in at least one of the pipe expansion part and the main-body part. This is effective when an adapter or attachment is attached to the pipe expansion portion or the connection portion by screwing. Because, in the screwing work (and screw removing work) for the pipe expansion part and the connection part, if the pedestal part is not sufficiently fixed to the concave part, the pedestal part will rise up during the work and it will be difficult to perform the work. This is because the presence of the holder prevents such a situation.

  Or according to this invention, the slide rail formation part is provided in the one part upper surface of the periphery of a recessed part, and a base part is accommodated by slidingly moving with respect to a recessed part. This is effective when an adapter or attachment is attached to the pipe expansion portion or the connection portion by screwing. This is because the slide rail forming part suppresses the upward lifting of the pedestal part, and the pedestal part floats during the screwing work (and the screw removing work) to the expanded pipe part and the connecting part, so that it is difficult to perform the work. It will prevent you.

It is a front view of the hydraulic pipe expander of the 1st Embodiment of this invention. It is a side view of the hydraulic pipe expander of FIG. It is a top view of the hydraulic pipe expander of FIG. It is a side view of the hydraulic pipe expander of FIG. 1 in a state where an attachment is attached. It is a top view of the hydraulic pipe expander of FIG. 1 in the usage mode using an extension pipe and extension wiring. It is a front view of the pipe expansion part of FIG. It is a side view of the pipe expansion part of FIG. It is a front view of the hydraulic pipe expander of the 2nd Embodiment of this invention. It is a side view of the hydraulic pipe expander of FIG. It is a top view of the hydraulic pipe expander of FIG. FIG. 9 is a side view of the hydraulic pipe expander of FIG. 8 with an attachment attached. FIG. 9 is a plan view of the hydraulic pipe expander of FIG. 8 in a usage mode using an extension pipe and extension wiring. It is a front view of the pipe expansion part of FIG. It is a side view of the pipe expansion part of FIG. It is a front view of the conventional hydraulic pipe expander. FIG. 16 is a side view of the (conventional) hydraulic pipe expander of FIG. 15. FIG. 16 is a side view of the (conventional) hydraulic pipe expander of FIG. 15 with an attachment attached. It is a schematic side view which shows the structure of an attachment.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a front view of a hydraulic pipe expander according to a first embodiment of the present invention, FIG. 2 is a side view of the hydraulic pipe expander of FIG. 1, and FIG. 3 is a hydraulic pipe expander of FIG. It is a top view of a pipe expander. FIG. 4 is a side view of the hydraulic pipe expander of FIG. 1 with the attachment attached. FIG. 5 is a plan view of the hydraulic pipe expander of FIG. 1 in a usage mode using an extension pipe and an extension wiring, FIG. 6 is a front view of the pipe expansion section of FIG. 5, and FIG. FIG.

  As shown in FIGS. 1 to 7, the hydraulic pipe expander 1 according to the present embodiment includes a hydraulic system 11 that converts electrical energy (using a household AC power source using a power cord (not shown)) into hydraulic pressure. The main body 10 includes a main body case 12 that houses the hydraulic system 11 and a switch section 14 that controls on / off of the activation of the hydraulic system 11.

  A hydraulic pipe connection port 13 extending upward in the vertical direction is provided on the upper surface of the main body case 12, and a switch wiring connection port 15 connected to the switch unit 14 is provided on the side surface of the main body case 12. It has been.

  When the switch unit 14 turns on the activation of the hydraulic system 11 in a state where a later-described hydraulic pipe 21 is connected to the hydraulic pipe connection port 13, the main body unit 10 supplies hydraulic pressure into the hydraulic pipe 21. It has become. The switch unit 14 of the present embodiment is configured to automatically return to the off state after maintaining the on state for 3 seconds.

  On the other hand, the hydraulic pipe expander 1 of the present embodiment includes a connection portion 27 to which an attachment 70 corresponding to the diameter of the pipe to be expanded is connected, and a hydraulic pipe 21 connected to the hydraulic pipe connection port 13. And a tube expansion portion 20 having a switch wiring 22 connected to the switch wiring connection port 15. The connecting portion 27 is composed of a piston rod inside a substantially cylindrical member 24 called a hydraulic cylinder. The hydraulic pipe 21 extends from the side surface of the substantially cylindrical member 24 to the side, then bends and extends obliquely upward and rearward. The switch wiring 22 extends from the rear side of the substantially cylindrical member 24.

  1 to 4, the hydraulic pipe 21 is directly connected to the hydraulic pipe connection port 13, and the switch wiring 22 is directly connected to the switch wiring connection port 15. FIG. As described above, the hydraulic pipe 21 can be connected to the hydraulic pipe connection port 13 via the extension pipe 31, and the switch wiring 22 can be connected to the switch wiring connection port 15 via the extension wiring 32. It has become.

  In the present embodiment, the connection between the hydraulic pipe connection port 13 and the hydraulic pipe 21 is a one-touch detachable type. Similarly, the connection between the hydraulic pipe connection port 13 and the extension pipe 31 and the extension pipe 31 and the hydraulic pipe. The connection with 21 is also a one-touch detachable type.

  On the other hand, the connection between the switch wiring connection port 15 and the switch wiring 22 is a screw fixing type. Similarly, the connection between the switch wiring connection port 15 and the extension wiring 32 and the connection between the extension wiring 32 and the switch wiring 22 are also performed. The screw is fixed.

  Moreover, the pipe expansion part 20 has a holding part 25 for facilitating handling and a pedestal part 26 for stable placement. As shown in FIGS. 6 and 7, the pedestal portion 26 of the present embodiment has two hollow prismatic members 26 a and 26 b extending in the front-rear direction, and 2 extending in the left-right direction connecting the upper surfaces of those prismatic members. There are two installation plates 26c and 26d, and a substantially cylindrical member 24 is fixed on the two installation plates 26c and 26d.

  And the recessed part 16 which can accommodate the two hollow prismatic members 26a and 26b of the base part 26 of the pipe expansion part 20 is provided in the upper surface of the main body case 12 (refer FIG. 5). The concave portion 16 has a rectangular parallelepiped shape, and has a rectangular shape in plan view as shown in FIG. And as a holder for holding the state in which the two hollow prismatic members 26a, 26b of the pedestal portion 26 are accommodated in the recess 16, a pair of buckle type holders 41, 42 are provided on the upper surface of the main body case 12. It is provided in the vicinity of the left and right edges of the recess 16.

  The grip portion 25 of the present embodiment is provided as a grip handle that extends in a direction substantially parallel to the pedestal portion 26 (extends in a substantially horizontal direction) above the substantially cylindrical member 24. In the present embodiment, a pressing-type switch operation unit 23 is provided on the upper surface side of the grip unit 25 (see FIG. 5). The switch operation unit 23 can operate on / off control of the switch unit 14 of the main unit 10 via the switch wiring 22 and the switch wiring connection port 15 of the main unit 10 (in this embodiment, the switch unit 14 Can be turned on for 3 seconds).

  Also, as shown in FIGS. 4 and 5, an attachment 70 similar to the conventional one is connected to the connection portion 27. Specifically, a male screw portion provided in the attachment 70 is screwed into the connection portion 27 of the present embodiment. Further, an adapter 60 is additionally attached according to the diameter of the pipe to be expanded. The adapter 60 is fixed to the substantially cylindrical member 24 in a fitting manner. When it is necessary to attach the adapter 60, it is performed prior to the attachment 70.

  Next, the operation of the present embodiment will be described.

  In the state of FIGS. 1 to 4, the hydraulic pipe 21 is directly connected to the hydraulic pipe connection port 13, and the switch wiring 22 is directly connected to the switch wiring connection port 15. The usage mode in this state is the same as that of the conventional hydraulic pipe expander 50. In this case, it is preferable that the pedestal portion 26 is sufficiently fixed to the recess 16 from the viewpoint of ease of screwing of the attachment 70. This is because if the fixing is not sufficient, the pedestal portion 26 may be lifted during the screwing or unscrewing operation on the substantially cylindrical member 24 or the connecting portion 27, making it difficult to perform the operation. In the present embodiment, the pair of buckle holders 41 and 42 prevents such a situation.

  On the other hand, the hydraulic pipe expander 1 according to the present embodiment can be used as shown in FIG. That is, the hydraulic pipe 21 can be connected to the hydraulic pipe connection port 13 via the extension pipe 31, and the switch wiring 22 can be connected to the switch wiring connection port 15 via the extension wiring 32. In this mode of use, since the pipe expansion section 20 can be separated from the main body section 10 (hydraulic system section) and only the pipe expansion section 20 can be brought into a narrow work site, the hydraulic pipe expander 1 can be effectively used even in a narrow work site. can do.

  That is, according to the present embodiment, a single hydraulic pipe expander 1 can provide a two-way usage mode of a separated type and an integrated type.

  The attachment 70 will be described in detail again. As shown in FIG. 18, the attachment 70 extends through the flange portion 71 and a flange portion 71 fixed to the substantially cylindrical member 24 of the pipe expansion portion 20. And a guide shaft 72 that is connected to the connecting portion 27 of the cage expanding portion 20 and can be retracted and moved with respect to the flange portion 71 when hydraulic pressure is applied. The guide shaft 72 is provided with an opposing flange portion 73 that faces the flange portion 71, and an elastically deformable resin ring 74 is provided between the flange portion 71 and the opposing flange portion 73.

  When the hydraulic pressure is applied to the attachment 70, the guide shaft 72 is retracted and the resin ring 74 is compressed between the flange portion 71 and the opposing flange portion 73 and deformed so as to swell toward the outer diameter side. The deformation force is used as a force for expanding the pipe. The functional principle of such an attachment is the same as that of the conventional hydraulic pipe expander 50.

  Next, a hydraulic pipe expander according to a second embodiment of the present invention will be described.

  8 is a front view of the hydraulic pipe expander according to the second embodiment of the present invention, FIG. 9 is a side view of the hydraulic pipe expander of FIG. 8, and FIG. 10 is the hydraulic pipe expander of FIG. It is a top view of a pipe expander. FIG. 11 is a side view of the hydraulic pipe expander of FIG. 8 with the attachment attached. 12 is a plan view of the hydraulic pipe expander of FIG. 8 in a usage mode using an extension pipe and an extension wiring, FIG. 13 is a front view of the pipe expansion section of FIG. 12, and FIG. It is a side view of 12 expanded pipe parts.

  As shown in FIGS. 8 to 14, the hydraulic pipe expander 101 according to the present embodiment uses electric energy (a household AC power source using a power cord not shown) as in the first embodiment. ) To a hydraulic pressure, a main body case 112 that accommodates the hydraulic system 111, and a main body portion 110 that includes a switch portion 114 that controls on / off activation of the hydraulic system 111.

  Unlike the first embodiment, the upper surface of the main body case 112 of the present embodiment is provided with a hydraulic pipe connection port 113 that extends upward and then bends and extends substantially in the horizontal direction. Further, similarly to the first embodiment, a switch wiring connection port 115 connected to the switch unit 114 is provided on the side surface of the main body case 112.

  When the switch unit 114 turns on the activation of the hydraulic system 111 in a state where a hydraulic pipe 121 (described later) is connected to the hydraulic pipe connection port 113, the main body part 110 also supplies hydraulic pressure into the hydraulic pipe 121. It has become. The switch unit 114 of this embodiment is configured to automatically return to the off state after maintaining the on state for 3 seconds.

  On the other hand, the hydraulic pipe expander 101 of the present embodiment includes a connection portion 127 to which an attachment 70 corresponding to the diameter of the pipe to be expanded is connected, and a hydraulic pipe 121 connected to the hydraulic pipe connection port 113. And a pipe expansion section 120 having a switch wiring 122 connected to the switch wiring connection port 115. The connecting portion 127 is composed of a piston rod inside a substantially cylindrical member 124 called a hydraulic cylinder. The hydraulic pipe 121 extends from the side surface of the substantially cylindrical member 124 to the side, then bends and extends rearward. The switch wiring 122 extends from the rear side of the substantially cylindrical member 124.

  8 to 11, the hydraulic pipe 121 is directly connected to the hydraulic pipe connection port 113, and the switch wiring 122 is directly connected to the switch wiring connection port 115. As shown in FIG. Thus, the hydraulic pipe 121 can be connected to the hydraulic pipe connection port 113 through the extension pipe 31, and the switch wiring 122 can be connected to the switch wiring connection port 115 through the extension wiring 32. It has become.

  In the present embodiment, the connection between the hydraulic pipe connection port 113 and the hydraulic pipe 121 is a one-touch detachable type. Similarly, the connection between the hydraulic pipe connection port 113 and the extension pipe 131 and the extension pipe 131 and the hydraulic pipe are connected. The connection with 121 is also a one-touch detachable type.

  On the other hand, the connection between the switch wiring connection port 115 and the switch wiring 122 is a screw fixing type. Similarly, the connection between the switch wiring connection port 115 and the extension wiring 132 and the connection between the extension wiring 132 and the switch wiring 122 are also performed. The screw is fixed.

  Moreover, the pipe expansion part 120 has a grip part 125 for facilitating handling and a pedestal part 126 for stable placement. As shown in FIGS. 13 and 14, the pedestal portion 126 according to the present embodiment has two hollow prismatic members 126 a and 126 b extending in the front-rear direction, and 2 extending in the left-right direction connecting the upper surfaces of these prismatic members. There are two installation plates 126c and 126d, and a substantially cylindrical member 124 is fixed on the two installation plates 126c and 126d. Here, as shown in FIG. 13, the lengths of the two installation plates 126c and 126d are shorter than the left and right widths of the two hollow rectangular column members 126a and 126b, and the left and right edges of the hollow rectangular column members 126a and 126b. The upper surface of the vicinity region is exposed. The exposed portion slides with respect to a slide rail forming portion 117 described later.

  On the other hand, the upper surface of the main body case 112 is provided with a recess 116 that can accommodate the two hollow rectangular column members 126a and 126b of the pedestal portion 126 of the tube expansion portion 120 (see FIG. 12). The recess 116 has a rectangular parallelepiped shape and is rectangular in plan view, but unlike the first embodiment, the front side is open to the side surface of the main body case 112 (see FIGS. 8 and 12). And the slide rail formation part 117 which is a substantially U-shaped board | plate material is planarly provided so that the upper surface of the right-and-left edge and back edge of the recessed part 116 may be covered (refer FIG. 12), and two of the base part 126 are provided. The exposed upper surfaces of the regions in the vicinity of the left and right edges of the hollow rectangular column members 126a and 126b slide with respect to the slide rail forming portion 117. Thereby, the two hollow prismatic members 126a and 126b of the pedestal portion 126 are accommodated (and removed) by sliding and moving from the front side with respect to the recess 116.

  Further, in the present embodiment, a retaining pin 143 is provided as a holder for holding the state in which the two hollow rectangular column members 126a and 126b of the pedestal portion 126 are accommodated in the recess 116, The retaining pins 143 are inserted into the through holes provided in the slide rail portion 117 and the bottomed holes or through holes provided in the pedestal portion 126 so as to correspond to each other. The retaining pin 143 is fixed to the upper surface of the main body case 112 via a wire 144.

  In addition, the grip portion 125 of the present embodiment is also provided as a grip handle that extends in a direction substantially parallel to the pedestal portion 126 (extends in a substantially horizontal direction) above the substantially cylindrical member 124. However, in the present embodiment, the pressing type switch operation unit 123 is provided as a pressing operation unit in a direction (substantially horizontal direction) substantially parallel to the pedestal unit 126 at the distal end portion of the grip handle. The switch operation unit 123 can operate on / off control of the switch unit 114 of the main unit 110 via the switch wiring 122 and the switch wiring connection port 115 of the main unit 110 (in this embodiment, the switch unit 114 Can be turned on for 3 seconds).

  Also, as shown in FIGS. 11 and 12, an attachment 70 similar to the conventional one is connected to the connecting portion 127. Specifically, a male screw portion provided in the attachment 70 is screwed into the connection portion 127 of the present embodiment. Further, an adapter 60 is additionally attached according to the diameter of the pipe to be expanded. The adapter 60 is fixed to the substantially cylindrical member 124 in a fitting manner. When it is necessary to attach the adapter 60, it is performed prior to the attachment 70.

  Next, the operation of the present embodiment will be described.

  8 to 11, the hydraulic pipe 121 is directly connected to the hydraulic pipe connection port 113, and the switch wiring 122 is directly connected to the switch wiring connection port 115. The usage mode in this state is the same as that of the conventional hydraulic pipe expander 50. In this case, it is preferable that the pedestal 126 is sufficiently fixed to the recess 116 from the viewpoint of ease of screwing operation of the attachment 70. This is because if the fixing is not sufficient, the pedestal 126 may be lifted up during the screwing or unscrewing operation with respect to the substantially cylindrical member 124 or the connecting portion 127, making it difficult to perform the operation. In the present embodiment, since the slide rail forming portion 117 suppresses the upward lifting of the entire left and right edges of the pedestal portion 126, the buckle-type holders 41 and 42 locally suppress the upward lifting. In addition, it is excellent in the effect of preventing the pedestal portion 126 from being lifted when the screwing operation (and the screw removing operation) is performed on the tube expansion portion 120 and the connection portion 127. Moreover, it is more advantageous in terms of cost than the case where the buckle type holders 41 and 42 are provided. Note that the length of the slide rail forming portion 117 covering the left and right edges of the pedestal portion 126 is preferably the entire length of the left and right edges of the pedestal portion 126. is there.

  Furthermore, in the present embodiment, even when a sliding movement force is generated in the pipe expansion part 120 due to some undesired factor, the pipe expansion part 120 is actually slid and moved from the recess 116 by utilizing the retaining pin 143. It is prevented from coming off. Even with such a simple holder, it is possible to sufficiently obtain the effect of preventing the expanded portion 120 from coming out of the recess 116.

  On the other hand, the hydraulic pipe expander 101 of the present embodiment can take a usage mode as shown in FIG. That is, the hydraulic pipe 121 can be connected to the hydraulic pipe connection port 113 via the extension pipe 131, and the switch wiring 122 can be connected to the switch wiring connection port 115 via the extension wiring 132. In this mode of use, since the pipe expanding part 120 can be separated from the main body part 110 (hydraulic system part) and only the pipe expanding part 120 can be brought into a narrow work site, the hydraulic pipe expander 101 can be effectively used even in a narrow work site. can do.

  That is, according to the present embodiment, it is possible to provide a two-way usage mode of a separation type mode and an integrated mode with a single hydraulic pipe expander 101.

  In the present embodiment, the switch operation portion 123 is provided as a pressing operation portion in a direction substantially parallel to the pedestal portion 126 at the distal end portion of the grip portion 125 (grip handle). Such an embodiment is remarkably excellent in that the switch operation unit 123 is less likely to be erroneously operated according to actual verification by the present inventors.

  Further, in the present embodiment, the hydraulic pipe connection port 113 is provided so as to be bent and extend in a substantially horizontal direction after extending upward. Such an embodiment is remarkably superior in that it saves space when stored.

DESCRIPTION OF SYMBOLS 1,101 Hydraulic pipe expander 10, 110 Main body part 11, 111 Hydraulic system 12, 112 Main body case 13, 113 Hydraulic pipe connection port 14, 114 Switch part 15, 115 Switch wiring connection port 16, 116 Recess 117 Slide rail formation part 20, 120 Expanded pipe section 21, 121 Hydraulic pipe 22, 122 Switch wiring 23, 123 Switch operating section 24, 124 Substantially cylindrical member 25, 125 Gripping section (gripping handle)
26, 126 Pedestal part 26a, 26b, 126a, 126b Hollow prismatic member 26c, 26d, 126c, 126d Installation plate 27, 127 Connection part 31 Extension pipe 32 Extension wiring 41, 42 Buckle type retainer 143 Retaining pin 144 Wire 50 Hydraulic pressure Type pipe expander (conventional)
51 Hydraulic System 52 Body Case 53 Hydraulic Pipe 54 Expanding Action Section 60 Adapter 70 Attachment 71 Flange (Spacer)
72 Guide shaft 73 Opposed flange 74 Resin ring

Claims (7)

A hydraulic system that converts electrical energy into hydraulic pressure;
A body case for housing the hydraulic system;
A hydraulic pipe connection port provided on the outer surface of the main body case;
A switch unit for controlling on / off of activation of the hydraulic system;
A switch wiring connection port connected to the switch unit and provided on the outer surface of the body case;
Have
When a hydraulic pipe is connected to the hydraulic pipe connection port, when the switch unit turns on the activation of the hydraulic system, hydraulic pressure is supplied into the hydraulic pipe. Prepared,
A hydraulic pipe that can be directly connected to the hydraulic pipe connection port and can be connected via an extension pipe;
A switch wiring that can be directly connected to the switch wiring connection port and can be connected via an extension wiring;
A switch operation unit operable to control on / off of the switch unit of the main body unit via the switch wiring and the switch wiring connection port of the main body unit;
A connection for connecting an attachment corresponding to the diameter of the pipe to be expanded;
Have
When hydraulic pressure is supplied to the hydraulic pipe in a state where an attachment is connected to the connection portion, the hydraulic pressure is applied to the attachment, and the attachment is temporarily deformed to expand the pipe. A tube expansion part
The tube expansion part has a grip part and a pedestal part for stable placement,
The main body portion has a recess capable of accommodating the pedestal portion of the tube expansion portion,
A slide rail forming part is provided on the upper surface of a part of the periphery of the concave part,
The pedestal portion of the expanded pipe portion against said recess of said body portion being adapted to be accommodated by sliding movement,
The grip portion is formed as a grip handle extending in a direction substantially parallel to the pedestal portion,
The hydraulic pipe expander according to claim 1, wherein the switch operation unit is provided at a distal end portion of the grip handle as a pressing operation unit in a direction substantially parallel to the pedestal unit . The holder for holding the state where the pedestal part of the pipe expansion part is stored in the concave part of the main part is provided in at least one of the pipe expansion part and the main part. Item 2. The hydraulic pipe expander according to Item 1 . The retainer is a retaining pin inserted into a through hole provided in the slide rail portion and a bottomed hole or a through hole provided in the pedestal portion so as to correspond to each other. Item 3. The hydraulic pipe expander according to Item 2 . The hydraulic pipe expander according to any one of claims 1 to 3 , wherein the hydraulic pipe connection port is provided so as to be bent and extend in a substantially horizontal direction after extending upward. The attachment is
A flange portion fixed to the expanded portion;
A guide shaft that extends through the flange portion and is connected to the connection portion of the pipe expansion portion and is retractable relative to the flange portion when hydraulic pressure is applied;
With
The guide shaft is provided with an opposing flange portion facing the flange portion,
An elastically deformable resin ring is provided between the flange portion and the opposed flange portion,
When hydraulic pressure is applied to the attachment, the guide shaft is pulled and moved so that the resin ring is compressed between the flange portion and the opposed flange portion and deformed so as to bulge to the outer diameter side. The hydraulic pipe expander according to any one of claims 1 to 4 , wherein the force is used as a force for expanding the pipe. A hydraulic pipe expander according to any one of claims 1 to 5 ;
One or more of the attachments;
The extension tube;
The extension wiring;
A hydraulic pipe expander set characterized by comprising The hydraulic pipe expander set according to claim 6 , wherein the extension pipe and the extension wiring are at least partially integrated.

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