JP3221304U - Device with terminal box - Google Patents

Abstract

An object of the present invention is to provide a device with a terminal box in which the range of rotation of the terminal box is enlarged with respect to the case. SOLUTION: A solenoid valve 1 as a device with a terminal box is attached to a case 2, a terminal block 3 supported by the case, and a case so as to be able to rotate 360 degrees to the case A terminal box 5 to be protected and a fixture 6 that allows rotation of the terminal box and prevents the terminal box from coming off the case are provided. The fixture includes a retaining member formed of split rings 7a and 7b fitted in the annular groove 53 of the terminal box, and a flange member 8 sandwiching a portion of the retaining member positioned outside the annular groove between the case , And a bolt 11 for fixing the flange member and the case. [Selected figure] Figure 12

Description

  The present invention relates to a device with a terminal box provided with a terminal box for protecting a connection point with an external electric wire.

  As an example of a device with a terminal box, there is a solenoid valve provided with a solenoid valve body and a terminal box. The solenoid valve main body includes a plunger for opening and closing the valve hole, a solenoid for electromagnetically driving the plunger, a case containing the above, and the like. The terminal box is a tubular member attached to the case of the solenoid valve main body, and guides an external electric wire for energizing the solenoid through the inside (see, for example, Patent Document 1).

  Among the above-described solenoid valves, there is one in which a terminal box is rotatably attached to a case of a solenoid valve main body. In the solenoid valve, a terminal block to which an external wire is connected is fixed in a terminal box, and the terminal block is connected to the solenoid side by an internal wire. In such a solenoid valve, since the user can change the angle of the terminal box, the routing of the external electric wire can be facilitated when wiring the external electric wire.

JP, 2004-245387, A

  However, in the case of the solenoid valve in which the terminal box can be rotated, the rotation angle of the terminal box is limited in order to avoid disconnection due to excessive twisting of the internal wire connecting the terminal block and the solenoid side. There was room for improvement in terms of further expanding the scope. In addition, devices such as solenoid valves may be required to be explosion proof, but it has not been easy to expand the rotation range of the terminal box after satisfying the explosion proof. In addition, these things can be similarly said in the device with a terminal box other than a solenoid valve.

  Then, this invention makes it a subject to provide the device with a terminal box which expanded the rotation range of the terminal box with respect to the case.

  The device with a terminal box according to the present invention comprises a case, a terminal block supported by the case, a terminal box rotatably mounted on the case, and protecting a connection point between an external wire and the terminal block And a fixture for permitting rotation of the box and preventing the terminal box from being detached from the case, wherein the terminal box is inserted into the case at one end and positioned outside the case at the other end. And an external wire guide extending from the outer peripheral surface of the cylindrical portion and positioned outside the case, and an annular groove is formed on the entire outer peripheral surface of the cylindrical portion, The mounting tool is a retaining member, a part of which is positioned in the annular groove and the remaining part is positioned outside the annular groove, and the remaining part of the retaining member between the case and the case. Sandwiching flange members, A fixing member for fixing the flange member and the case, the terminal block is positioned inside the cylindrical portion, and the terminal box is the cylindrical portion relative to the case and the terminal block The external electric wire is passed through the external wire guide portion and connected to the terminal block in the cylindrical portion.

  According to the present invention, since the terminal block is supported by the case, the terminal block does not rotate even if the terminal box is rotated, and additionally, the terminal box is provided with 360 degrees of the above configuration. It is possible to rotate, and the rotation range of the terminal box can be expanded.

It is a top view of a solenoid valve as a "device with a terminal box" concerning one embodiment of the present invention. It is a perspective view of the solenoid valve of FIG. It is a figure of the flange member which comprises the electromagnetic valve of FIG. 1, (a) is a front view of a flange member, (b) is a BB sectional view in (a), (c) is a back view of a flange member It is. It is a figure of the retaining member which comprises the solenoid valve of FIG. 1, (a) is a front view of a retaining member, (b) is the CC sectional view taken on the line in (a). It is an exploded view of the solenoid valve of FIG. 1, and is an exploded view in the cross section which followed the AA line in FIG. It is the figure which assembled the bolt of FIG. 5 to the flange member. It is the figure which assembled the flange member of FIG. 6 in the terminal box. It is the figure which fitted the parting ring of FIG. 7 in the annular groove of a terminal box. It is the figure which assembled the terminal box of FIG. 8 in the case. It is the figure which fixed the flange member and case of FIG. 9 with a volt | bolt. It is the figure which screwed the press bolt of FIG. 10 into the bolt hole of a flange member. It is a figure with which the external electric wire was connected to the terminal block of FIG.

  A "terminal box attached device" according to an embodiment of the present invention will be described with reference to Figs. In this example, an example in which the “device with a terminal box” is applied to the “electromagnetic valve” will be described.

  The electromagnetic valve 1 as the “device with terminal box” shown in FIGS. 1 to 12 includes a case 2, a terminal block 3 supported by the case 2, a terminal box 5 rotatably attached to the case 2, and a terminal box The cover 9, the fixture 6, a plunger housed in the case 2, a solenoid, a substrate 14, a support member 15 and the like are provided. In the solenoid valve 1, a voltage is applied to a solenoid via the external wire 4 (shown in FIG. 12), the terminal block 3, the substrate 14 and the like, and the solenoid electromagnetically drives the plunger to form a flow passage (not shown). Open and close.

  The case 2 is made of metal, and integrally includes a cylindrical main body portion 21 and a flange portion 22 formed in an annular and hook shape at one end of the main body portion 21. A plurality of bolt holes 23 are formed in the flange portion 22. These bolt holes 23 are arranged at equal intervals in the circumferential direction of the flange portion 22. Each bolt hole 23 penetrates the flange portion 22 in the central axis direction of the main body portion 21. A bolt 11 for fixing a flange member 8 to be described later and the case 2 is screwed into the bolt hole 23.

  The terminal block 3 is a component to which the external wire 4 is connected. In the present example, a total of four external wires 4 of two power lines and two signal lines are connected to the terminal block 3. In addition, the number and the kind of these external wires 4 are an example of the present invention, and for example, three power supply lines may be connected. The terminal block 3 is mounted on the substrate 14. The substrate 14 is connected to the solenoid via an internal wire or the like. Also, the substrate 14 is fixed to the case 2 via the support member 15. Thus, the terminal block 3 is supported by the case 2 via the substrate 14 and the support member 15. Also, the terminal block 3 protrudes from the opening at one end of the main body 21 to the outside of the case 2.

  The terminal box 5 is a member that protects a connection point between the external wire 4 and the terminal block 3 and is made of metal. The terminal box 5 integrally includes the cylindrical portion 51 and the external wire guide portions 52a and 52b.

  The cylindrical portion 51 is formed in a cylindrical shape, and one end thereof is inserted into the case 2 and the other end is positioned outside the case 2. The opening on the other end side of the cylindrical portion 51 is closed by a metal terminal box cover 9. In addition, the terminal box cover 9 is fixed to the terminal box 5 by the bolts 13. As shown in FIG. 5 and the like, on the outer peripheral surface of the cylindrical portion 51, an annular recessed groove 53 is formed over the entire periphery thereof. A retaining member 7 described later is fitted in the annular groove 53.

  The external wire guide portions 52 a and 52 b are cylindrically extended from the outer peripheral surface of the other end of the cylindrical portion 51, and are positioned outside the case 2. The internal space of the outer wire guide portions 52a and 52b and the internal space of the cylindrical portion 51 communicate with each other. The central axes of the outer wire guide portions 52a and 52b are perpendicular to the central axis P of the cylindrical portion 51 (shown by a dashed dotted line in FIG. 11). Further, the central axis of the outer wire guiding portion 52a is perpendicular to the central axis of the outer wire guiding portion 52b. The outer wire guide portions 52a and 52b guide the outer wire 4 to the inside of the cylindrical portion 51 through the inner wire 4a. The number of the outer wire guide portions 52a and 52b, the angle of the outer wire guide portions 52a and 52b with respect to the cylindrical portion 51, and the like can be set as appropriate. Further, it is not necessary to use all the external wire guides 52a and 52b, and the external wire guides 52a and 52b not used at the user side may be sealed.

  Such terminal box 5 can be rotated 360 degrees along the circumferential direction of the cylindrical portion 51 with respect to the case 2 and the terminal block 3. The terminal block 3 is positioned inside the cylindrical portion 51 in a state where the terminal box 5 is attached to the case 2.

  The fixture 6 permits rotation of the terminal box 5 and prevents the terminal box 5 from being detached from the case 2, and includes a retaining member 7 shown in FIG. 4 and a flange member 8 shown in FIG. And a plurality of bolts (corresponding to “fixing members”) 11.

  In the present embodiment, the retaining member 7 is constituted by two divided rings 7a and 7b obtained by dividing the ring into two. The split rings 7a and 7b are made of metal. The split rings 7 a and 7 b are fitted in the annular recessed groove 53 of the terminal box 5. As shown in FIG. 8 etc., part of the inner peripheral side of the split rings 7 a and 7 b is positioned in the annular groove 53, and the remaining portion is positioned outside the annular groove 53.

  The flange member 8 is made of metal and formed in a ring shape. As shown in FIG. 3, the flange member 8 is formed between the central hole 80, the plurality of first bolt holes 81 formed around the hole 80, and the adjacent first bolt holes 81. And 2 bolt holes 82. The first bolt holes 81 and the second bolt holes 82 are female screws.

  The hole 80 and the plurality of first bolt holes 81 penetrate the flange member 8 in the central axis direction. The second bolt hole 82 penetrates the flange member 8 from its outer peripheral surface to the hole 80. The second bolt holes 82 extend in the direction orthogonal to the central axis of the flange member 8 (that is, the direction orthogonal to the central axis P of the cylindrical portion 51). The hole 80 is formed of a small diameter portion 80a corresponding to the outer diameter of the cylindrical portion 51, and a large diameter portion 80b larger in diameter than the small diameter portion 80a. A stepped surface 80c is formed at the boundary between the small diameter portion 80a and the large diameter portion 80b. The step surface 80 c is perpendicular to the central axis of the flange member 8.

  Such a flange member 8 positions the cylindrical portion 51 and the retaining member 7 (i.e., the split rings 7a and 7b) in the hole 80, as shown in FIG. 10 and the like. And between. In detail, a portion (that is, “the remaining portion”) of the retaining member 7 located outside the annular groove 53 is sandwiched between the step surface 80 c and the flange portion 22.

  As shown in FIG. 11, the bolt 11 has a shaft 11a and a head 11b, and the flange 11 and the case are screwed by screwing the shaft 11a into the first bolt hole 81 and the bolt hole 23. Fix 2 and. Moreover, in this example, as shown in FIG. 11, the axis 11a of the bolt 11 and the central axis P of the cylindrical portion 51 are parallel. By setting the fastening direction of the bolt 11 in this manner, the assembling strength of the flange member 8 and the flange portion 22 can be enhanced.

  Thus, the mounting tool 6 prevents the terminal box 5 from being removed while allowing the rotation of the terminal box 5 by positioning the retaining member 7 in the annular recessed groove 53. Further, with regard to the rotation angle of the terminal box 5, it is of course possible to rotate 360 degrees or more, and the rotation angle is not limited. Explosion-proof performance (when explosion of explosive gas occurs inside the solenoid valve 1, the container such as the case 2 and the terminal box 5 withstands the pressure and the external pressure The terminal box 5 can be rotated without limitation while satisfying the capability of preventing the propagation of the explosion to the explosive gas.

  The solenoid valve 1 further includes a pressing bolt 12 screwed into the second bolt hole 82. The pressing bolt 12 is screwed into the bolt hole 82 so that the tip thereof presses the retaining member 7 against the central axis P of the cylindrical portion 51. Thus, when the tip of the pressing bolt 12 presses the retaining member 7, the frictional force between the retaining member 7 and the terminal box 5 can be increased, and the rotation of the terminal box 5 can be regulated. That is, the terminal box 5 can be made non-rotatable by tightening the pressing bolt 12 tightly.

  In this example, a second bolt hole 82 corresponding to the dividing ring 7a and a second bolt hole 82 corresponding to the dividing ring 7b are respectively formed, and a plurality of pressings screwed into the respective second bolt holes 82 are formed. It has a bolt 12.

  Subsequently, a method of assembling the above-described solenoid valve 1 will be described with reference to FIGS. First, as shown in FIG. 5, the terminal box cover 9 is assembled to the terminal box 5 in advance. In addition, as shown in FIG. 5, various components such as a plunger, a solenoid, an internal wire, a support member 15, a substrate 14, and a terminal block 3 are assembled to the case 2 in advance. Next, as shown in FIG. 6, the bolt 11 is assembled to the first bolt hole 81 of the flange member 8. Next, as shown in FIG. 7, the flange member 8 is assembled to the terminal box 5. Next, as shown in FIG. 8, the split rings 7 a and 7 b are fitted into the annular recessed groove 53 of the terminal box 5. Next, as shown in FIG. 9, the terminal box 5 is assembled to the case 2. Next, as shown in FIG. 10, the flange member 8 and the case 2 are fixed by bolts 11. Next, as shown in FIG. 11, the pressing bolt 12 is assembled to the second bolt hole 82 of the flange member 8. After these steps, the assembly of the solenoid valve 1 is completed, and can be shipped.

  When the solenoid valve 1 shown in FIG. 11 is installed in a plant or the like, the case 2 side is connected to a pipe or the like, and the external electric wire 4 is connected to the terminal block 3. When connecting the external wire 4, the pressure bolt 12 is loosened to make the terminal box 5 rotatable. Then, after the terminal box 5 is positioned at a desired angle, the pressing bolt 12 is tightened to make the terminal box 5 non-rotatable. Then, the terminal box cover 9 is once removed, and the external wire 4 is drawn into the cylindrical portion 51 from the external wire guide portions 52 a and 52 b and connected to the terminal block 3. Thereafter, the terminal box cover 9 is assembled to the terminal box 5 again to complete. At the time of maintenance or the like, it is possible to make the terminal box 5 rotatable again by loosening the pressing bolt 12. The solenoid valve 1 of this example maintains a predetermined explosion proof performance even in the state where the pressure bolt 12 is loosened.

  In the electromagnetic valve 1 configured as described above, since the substrate 14 on which the terminal block 3 is mounted is fixed to the case 2 by the support member 15, the internal wire connected to the terminal block 3 or the substrate 14 even when the terminal box 5 is rotated Does not rotate and there is no risk of the internal wire breaking. In addition to this, by using the fixture 6 described above, it is possible to rotate the terminal box 5 360 degrees (unlimitedly) with respect to the case 2 after satisfying the explosion proof performance. Such a solenoid valve 1 can facilitate the routing of the external wire 4 when wiring the external wire 4 or the like.

  In the embodiment described above, the retaining member 7 is constituted by two split rings 7a and 7b obtained by dividing the ring into two, but the "preventing member" of the present invention is not limited to the configuration of the above embodiment, For example, the ring may be configured by three or more divided rings into which the ring is divided into three or more. Further, as the "retaining member" of the present invention, in addition to the split ring, an existing part such as an E ring may be used. Furthermore, the cross-sectional shape of the "retaining member" may be a wedge shape.

  Although the above-mentioned embodiment explained the example to which "a device with a terminal box" was applied to "a solenoid valve", "a device with a terminal box" of the present invention may be applied to devices other than a solenoid valve.

  The above embodiment only shows a typical form of the present invention, and the present invention is not limited to the embodiment. That is, those skilled in the art can carry out various modifications without departing from the gist of the present invention in accordance with conventionally known findings. Of course, as long as the configuration of the present invention is provided by such a modification, it is of course included in the scope of the present invention.

1 Solenoid valve (device with terminal box)
2 case 3 terminal block 4 external electric wire 5 terminal box 6 fixture 7 retaining member 8 flange member 11 bolt (fixing member)
51 cylindrical portion 52a, 52b external wire guide portion 53 annular groove

Claims (5)

With the case,
A terminal block supported by the case;
A terminal box rotatably mounted on the case and protecting a connection point between an external wire and the terminal block;
And a fixture for permitting rotation of the terminal box and preventing the terminal box from coming off the case;
The terminal box includes a cylindrical portion having one end inserted into the case and the other end positioned outside the case, and an external wire guide extending from the outer peripheral surface of the cylindrical portion and positioned outside the case. ,
An annular groove is formed on the entire circumference of the outer peripheral surface of the cylindrical portion,
The mounting member is a retaining member having a portion positioned in the annular groove and the remaining portion positioned outside the annular groove, and the remaining portion of the retaining member between the case and the case And a fixing member for fixing the flange member and the case.
The terminal block is positioned inside the cylindrical portion,
The terminal box is rotatable 360 degrees along the circumferential direction of the cylindrical portion with respect to the case and the terminal block,
The device with a terminal box, wherein the external wire passes through the external wire guide portion and is connected to the terminal block in the cylindrical portion. The device with a terminal box according to claim 1, wherein the fixing member is a bolt, and an axis of the bolt is parallel to a central axis of the cylindrical portion. The flange member is formed with a bolt hole extending in a direction orthogonal to the central axis of the cylindrical portion,
It further comprises a pressing bolt screwed into the bolt hole,
The terminal box according to claim 1 or 2, wherein the tip end of the pressing bolt presses the retaining member toward the central axis of the cylindrical portion by screwing the pressing bolt into the bolt hole. With device. The device with a terminal box according to any one of claims 1 to 3, wherein the retaining member is constituted by a plurality of divided rings obtained by dividing the ring. The case includes a plunger for opening and closing a valve hole, and a solenoid for electromagnetically driving the plunger.
The device with a terminal box according to any one of claims 1 to 4, which is a solenoid valve in which a voltage is applied to the solenoid via the external wire.

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