JP4851472B2 - Screw-up type terminal block and screw removal jig - Google Patents

Description

  The present invention, for example, in a terminal block as a wiring relay and branching device used in switchboards such as nuclear power plants, thermal power plants and substations, control panels and monitoring panels, etc. When connecting, the screw is fastened easily and reliably by moving (up) the screw together with the washer in the direction perpendicular to the terminal surface while the screw is rotated and removed from the screw hole of the terminal. The present invention relates to a screw extraction jig used when replacing screws such as an up-type terminal block and a screw blur of a screw-up type terminal block.

  This type of screw-up type terminal block is disclosed in Patent Document 1 as shown in FIGS.

  FIG. 11 is a front view showing a configuration example of a main part of a conventional screw-up type terminal block disclosed in Patent Document 1, and FIG. 12 is a perspective view when the screw-up type terminal block of FIG. 11 is viewed obliquely from above. FIGS. 13A and 13B are perspective views when the screw-up terminal block of FIG. 11 is viewed obliquely from below.

  11 to 13, the conventional screw-up type terminal block 1 includes a screw 2 such as a pan screw formed by fitting a spack as a washer means and a flat washer 21 into a screw neck, and a neck portion of the screw 2. An L-shaped washer 3 having a screw holding hole that can be fitted to hold the head, a terminal 5 having a screw hole 4 for fastening at one end of a strip-shaped metal strip, and this terminal A unit 6 comprising an insulating member that holds the screw 5 and guides the screw 2 in a direction perpendicular to the terminal 5 together with the washer 3 (up / down), and a hexagon of the unit 6 below the screw hole 4 of the terminal 5. One end is inserted into a nut 7 that is housed in the hole and allows the screw 2 to be screwed through the screw hole 4, and a protrusion provided on the back of the L-shaped washer 3, and is separated from the screw hole 4. In the direction (perpendicular to the wide surface of the terminal 5) And a compression spring 8 biasing.

  Since the screw 2 is screw-formed after the spack (S washer) and the flat washer 21 are fitted into the screw neck, the spuck and the flat washer 21 do not fall off from the screw body. In this case, the outer diameter of the flat washer 21 is larger than the outer diameter of the spuck.

  As shown in FIGS. 14 to 16, the washer 3 includes a rectangular washer member 31 having a screw holding hole, and a support member 32 that is continuously provided in an L shape on one side of the washer member 31. ing. The support member 32 is arranged in a direction perpendicular to the wide surface of the terminal 5, and a central portion in the width direction in the vicinity of the continuous portion of the support member 32 is cut and raised so that the tip portion is directed to the terminal 5 side. A protrusion 33 is formed. A compression spring 8 is attached to the tip of the L-shaped projection 33. Thus, a washer and a spring-loaded screw (see FIG. 14), which are intermediate assemblies, are configured. In this case, the L-shaped projecting portion 33 is cut and raised from the support member 32, and the groove width of the cut and raised portion is a groove width smaller than the spring outer diameter of the compression spring 8, and The die is pulled out in the arrangement direction of the compression spring 8. As a result, as shown in FIG. 17, the L-shaped projecting portion 33 is tapered so that the tip thereof becomes thinner, and becomes tapered, ensuring the stability of the compression spring 8 during spring compression. When the L-shaped protrusion 33 (one-stage bent structure) is inserted into the inner diameter of the compression spring 8, the compression spring 8 is not easily caught by the L-shaped protrusion 33. In addition, when the spring is extended, the compression spring 8 is surrounded by a columnar shape or a prismatic shape by assembling it in a predetermined position (for example, a recess) of the unit 6 to be configured, and the stability of the position of the compression spring 8 is ensured. . The screw 2 and the washer 3 are not caulked, but are simply passed through the screw holding hole of the washer 3 from the tip portion of the screw 2 to hold the head of the screw 2 in the screw holding hole of the washer 3. That is, the screw 2 and the washer 3 are separable (a structure in which the screw 2 is not crimped to the washer 3).

  A plurality of units 6 are connected in the thickness direction, and a wall member 61 having a vertical surface structure for insulation from adjacent units 6, the above-described screw 2, washer 3, terminal 5, nut 7 and compression spring. And a rib member 62 erected from the wall member 61 in order to accommodate 8.

  The unit 6 has a screw holding portion 63 that holds the screw 2 together with the washer 3 by the urging force of the compression spring 8. The screw holding portion 63 is provided in the ceiling portion of the unit 6 where the screw 2 is screwed up, and the outer peripheral edge portion of the flat washer 21 by letting the pan-like head of the screw 2 escape through the hole in the ceiling portion of the unit 6. A rib is provided to fix the spring against spring bias.

  Since the compression spring 8 is disposed behind the washer 3 and the spring length can be removed, the outer diameter of the spring can be reduced. Therefore, the space of the spring portion can be reduced, and the spring outer diameter is small but the number of turns can be increased. You can reduce dripping.

  With the above configuration, when the screw 2 is first rotated and loosened with a screwdriver during regular maintenance, the tip of the screw 2 is detached from the screw hole 4 of the terminal 5, and the screw 2 is biased by the urging force of the compression spring 8. Moves together with the washer 3 in the direction perpendicular to the wide surface of the terminal 5 (up). At this time, the pan-shaped head portion of the screw 2 is released by the hole in the ceiling portion of the unit 6, and the outer peripheral edge portion of the flat washer 21 is fixed against the urging force of the compression spring 8 by the screw holding portion 63. In this state, the screw body of the screw 2 does not come off from the washer 3 and the flat washer 21 and fall off.

  Next, after inserting a crimping terminal to which a wire is crimped into the gap between the tip of the screw 2 and the screw hole 4 of the terminal 5, the screw-shaped head of the screw 2 is pressed with the tip of the screwdriver and screwed. 2 and the washer 3 are lowered against the urging force of the compression spring 8, and are fastened to the nut 7 under the screw hole 4 through the tip of the foot of the screw 2 in the hole of the crimping terminal, thereby fixing the crimping terminal to the terminal 5 and the washer 3. And put in between. Thereby, the terminal 5 and an electric wire are electrically connected.

  Here, if the screw 2 is lowered with the washer 3 with respect to the unit 6 and the terminal 5 in a state where the screw 2 is raised with respect to the wide surface of the terminal 5 together with the washer 3, as shown in FIG. The screw 2 can be extracted from the screw holding hole. This is effective for screw replacement when the screw 2 is blurred.

Each of the terminals 5 is composed of two strips, and one of the strips is electrically connected by contacting the opposite side to the side where the screw holes 4 are formed. However, the contact portion can be electrically cut off by inserting an insulating rod through the insertion port 10a. At the time of this interruption | blocking, by inserting a conductive rod from the insertion port 10b, the conductive rod and the other strip | belt material of the one terminal 5 can be electrically connected, and a conductive rod is inserted from the insertion port 10c. Thus, the conductive rod and the other band member of the other terminal 5 can be electrically connected.
JP 2004-011237 A

  However, in the conventional screw-up type terminal block 1, the pan-shaped head of the screw 2 is released by the hole in the ceiling of the unit 6 and the outer peripheral edge of the flat washer 21 is received by the rib of the unit 6. 18 with the washer 3 raised with respect to the wide surface of the terminal 5, as shown in FIG. 18, the screw 2 of the washer 3 is tilted together with the washer 3 while pushing the screw 2 against the unit 6 and the terminal 5 to move downward. When extracting the screw 2 from the holding hole, it is difficult to push only the washer 3 from above, and in practice, the operation of extracting the screw 2 is not easy. In particular, if the screw 2 is left dropped on the voltage application part during the extraction operation of the screw 2 in a narrow place, an accident will occur due to a short circuit at the start-up.

  The present invention solves the above-described conventional problems, and can be used to easily press only the washer from above, and to quickly and easily and reliably remove the screw from the screw holding hole of the washer. Provided are a table and a screw extraction jig used therefor.

  In the screw-up type terminal block according to the present invention, when the screw is rotated and the screw tip is removed from the screw hole of the terminal, the screw is raised together with the washer by the biasing force of the spring having one end attached to the washer. In the screw-up type terminal block, in a state where the screw is removably attached to the screw holding hole of the washer, the washer means attached to the neck of the screw by the biasing force of the spring, and the head of the screw A screw holding portion that can be held by receiving at least one of the portions, and the screw holding portion is provided in a unit composed of an insulating member that holds the washer, the screw, and the terminal. A washer pressing hole for pressing the washer through a tool or a jig is provided, whereby the above object is achieved.

  Preferably, the screw holding portion in the screw-up type terminal block of the present invention comprises a round hole or a part of or a part of the round hole that can be held by receiving the screw head and / or the washer means. The washer pressing hole is formed by a cutout portion opened to the round hole or the partial round hole side.

  Further preferably, the screw holding portion in the screw-up type terminal block of the present invention can be held by receiving the washer further by the biasing force of the spring.

  Further preferably, the screw holding portion in the screw-up type terminal block of the present invention is formed in the ceiling portion of the unit, and the washer pressing hole is formed in the ceiling portion.

  Further preferably, the washer in the screw-up type terminal block of the present invention has a washer member having the screw holding hole, and a support member connected in an L shape to the washer member, and the support member The washer pressing hole is provided corresponding to a position where pressing is possible on the L-shaped portion of the washer through a tool or a jig.

  The screw extraction jig of the present invention is the above-described screw-up type terminal block of the present invention, wherein a pressing tool or a pressing jig that allows the washer to be pressed from the top through the washer pressing hole, and the pressing jig. A tool for holding the screw or a jig for holding the screw so that the lower part of the neck of the screw can be held in a state where only the washer is held by the tool for holding or the holding jig. Achieved.

  In addition, when the screw removing jig of the present invention rotates the screw and removes the screw tip from the screw hole of the terminal, the screw is lifted together with the washer by the biasing force of the spring with one end attached to the washer. In the screw-up type terminal block, the washer means attached to the neck of the screw by the biasing force of the spring in a state where the screw is removably attached to the screw holding hole of the washer, and the screw There is provided a screw holding portion that can be held by receiving at least one of the heads, and a pressing tool or pressing jig that can press only the washer from above while avoiding the screw and the washer means; A screw holding tool or a screw holding jig that can be held with the lower part of the neck of the screw being held in a state where only the washer is pressed by the pressing tool or the holding jig, Ri the above-mentioned object can be achieved.

  Further preferably, the screw holding jig in the screw extraction jig of the present invention is formed in a circular portion that allows the tip of the plate body to be held across the neck lower portion of the screw, and the circular portion Is formed in a split state, and slits are formed so as to be able to approach or separate from each other with springiness, so that the lower part of the neck of the screw can be sandwiched and held by each partial circular part of the split from both sides. .

  Further preferably, the circular portion of the screw extraction jig according to the present invention has an opening at the tip portion facing the slit so that the lower neck portion of the screw can be easily inserted, and the circular portion has an opening. Is inserted into the lower neck portion of the screw so that the inner surface of the circular portion can hold the lower neck portion of the screw.

  Furthermore, it is preferable that one or a plurality of stepped portions for preventing the screw from falling off is formed on the inner surface of the circular portion of the screw extraction jig according to the present invention.

  With the above configuration, the operation of the present invention will be described below.

  In the present invention, in a state where the screw is removably attached to the screw holding hole of the washer, at least one of the washer means attached to the neck portion of the screw by the biasing force of the spring and the head portion of the screw For holding the washer through a tool or jig to the screw holding part or a unit made of an insulating member for holding the washer, the screw, and the terminal. A hole is provided. The screw holding portion is provided in a unit made of an insulating member that holds a washer, a screw, and a terminal.

  By passing a tool or jig through this washer pressing hole, it is possible to easily and accurately press only the washer from the top of the tool or jig from the top. It can be easily and accurately extracted.

  Also, avoiding the screws and washers, only the washer can be pressed from above with a holding tool or holding jig, and only the washer is pressed with the holding tool or holding jig. By holding the lower neck portion of the screw with the tool, the screw can be quickly and easily extracted accurately from the screw holding hole of the washer.

  As described above, according to the present invention, only the washer can be pressed quickly and easily using the pressing tool or pressing jig, and the screw can be quickly and easily extracted accurately from the screw holding hole of the washer. be able to.

  Below, each embodiment of the screw-up type terminal block of this invention and the screw extraction jig | tool used for this is described, referring drawings.

  FIG. 1 is a perspective view of a configuration example of a main part of a screw-up type terminal block according to an embodiment of the present invention when viewed obliquely from above. In addition, the same member number is attached | subjected and demonstrated to each structural member which show | plays the same effect as the structural member of the conventional screw up type terminal block of FIGS. 11-13.

  In FIG. 1, a screw-up type terminal block 1A of the present embodiment has a screw 2 such as a pan screw formed by fitting a spack as a washer means and a flat washer 21 on a screw neck, and a neck portion of the screw 2 being externally fitted. And an L-shaped washer 3 having a screw holding hole capable of holding the head, and at least one end of a strip-shaped metal strip (if the terminal 5 is rectangular, the screw hole 4 at both ends of the terminal However, in this case, the screw hole 4 is provided only at one end portion), the terminal 5 having the screw hole 4 for fastening, and the terminal 5 is held and perpendicular to the terminal 5 The screw 2 is accommodated in a hexagonal hole of the unit 6A made of a resin insulating member that guides the screw 2 in a direction so as to be movable (up / down) together with the washer 3, and the screw 6 of the unit 6A below the screw hole 4 of the terminal 5. A screw that can be screwed through the screw hole 4 The washer 3 is attached in a direction away from the screw hole 4 (perpendicular to the wide surface of the terminal 5) by inserting one end into the protrusion 7 and the protrusion provided on the back of the L-shaped washer 3. And a compression spring 8 (shown in FIG. 11 and not shown in FIG. 1). About this structure, it is the structure substantially the same as the structure of the conventional screw-up type terminal block 1 of FIG. 11, but the structure is different as the unit 6A, and is connected to the support member 32 on one side of the washer member 31. A cutout portion 65A for pressing the upper portion of the L-shaped portion 35 from above with a tip of a holding tool of a tool such as a screwdriver or a screw extraction jig (not shown), which will be described later, is formed. It is.

  A plurality of units 6A are connected in the thickness direction, and have a wall member 61 having a vertical surface structure for insulation from adjacent units 6A, the above-described screw 2, washer 3, terminal 5, nut 7, and compression. A rib member 62 erected from the wall member 61 is provided to accommodate the spring 8 (shown in FIG. 10 and not shown in FIG. 1).

  Further, the unit 6A has a screw holding portion 63 that holds the screw 2 together with the washer 3 by the urging force of the compression spring 8 (not shown in FIG. 1). The screw holding portion 63 is provided so as to protrude downward on the ceiling portion 64 of the unit 6A. The screw-like head portion of the screw 2 is escaped through the hole 64A of the ceiling portion 64 of the unit 6A and is removed from the flat washer 21. The peripheral edge portion is provided as a rib for fixing against the spring biasing force. Furthermore, as described above, a tool such as a screwdriver, which will be described later, is provided at the center portion in the depth direction of the ceiling portion 64 where the central upper surface of the unit 6A is a flat portion 66 for placing a symbol plate (not shown). In addition, a rectangular or partially circular cutout portion 65A for pressing the washer member 31 through the tip portion (rectangular section, square, or circle) of the holding jig of the screw extraction jig is opened to the hole 64A side. Is formed. That is, the screw holding portion 63 is configured by a part or all of a hole 64A (for example, a round hole) that can receive and hold the head of the screw 2 and / or the flat washer 21, and serves as a washer pressing hole. The cutout portion 65A is open to the round hole (or part round hole) side.

  With the above configuration, from the state in which the screw 2 is raised with respect to the wide surface of the terminal 5 together with the washer 3, the tip of the driver 101 is passed through the notch 65A of the ceiling portion 64 of the unit 6A as shown in FIG. By pressing the L-shaped portion 35 of the washer 3, the washer 3 is pushed down to the position of the terminal 5 together with the screw 2. At this time, the neck of the screw 2 is lifted from the washer 3 as shown in FIG. The lower part of the foot of the screw 2 is picked with radio pliers 102 (may be tweezers), and the screw 2 is once lifted upward in the unit space as shown in FIG. It removes from the washer 3 and removes it from the front-end | tip part of the screw | thread 2 with the radio pliers 102 like FIG.2 (c).

  In this way, only the washer 3 can be easily pushed from above by the tip portion of the driver 101, and the screw 2 can be quickly and easily pulled out from the screw holding hole 4 of the washer 3. As a result, when replacing the screw such as when the screw 2 is blurred, the units 6A may be detached from the rail, or the screw 2 may be dropped on other voltage application parts that may cause a short circuit, resulting in an accident. It is solved more.

  Thus, as shown in FIG. 2 (d), it can be removed from the foot tip side of the screw 2 to the outside of the unit 6A, but not limited to this, the head of the screw 2 as shown in FIG. 2 (e). It can also be removed from the unit side to the outside of the unit 6A.

  As described above, according to the present embodiment, the screw-up type terminal block that raises the screw 2 together with the washer 3 in the direction perpendicular to the wide surface of the terminal 5 in a state where the screw 2 is rotated and removed from the screw hole 4 of the terminal 5. In 1A, in a state where the screw 2 is removably attached to the screw holding hole 4 of the washer 3, the screw holding portion 63 that receives and holds the flat washer 21 of the screw 2 by the urging force of the compression spring 8 is a screw. It is provided on the ceiling portion 64 of the unit 6A of the up-type terminal block 1A. By pressing the tip portion of the driver 101 on the L-shaped portion 35 of the washer 3 through the notch 65A of the ceiling portion 64 of the unit 6A, only the washer 3 can be quickly and easily pressed from above. In addition, the lifted screw 2 can be quickly and easily and reliably extracted without picking the screw 2 with radio pliers or tweezers and dropping the screw 2 from the screw holding hole 4 of the washer 3.

  In the above-described embodiment, the case has been described in which only the washer 3 is pressed through the notch portion 65A of the driver 101 and the lifted screw 2 is sandwiched and extracted with radio pliers or tweezers. Using a holding jig 103 having a long circular cross section (or rectangular or square cross section) as shown in FIG. 3, only the washer 3 is passed through the notch 65A at the circular cross section of the holding jig 103. The screw 2 that is pressed and lifted can be pulled out of the unit 6A by being sandwiched by a screw holding jig 104 as shown in FIG. That is, the screw extraction jig includes a pressing tool or a pressing jig that allows the washer 3 to be pressed from above through the notch portion 65A as a washer pressing hole, and the pressing tool or pressing jig. A screw holding tool or a screw holding jig is provided that can hold the screw 2 with the washer 3 held between them.

  As the screw holding jig 104, the tip of the plate is formed into a circular portion 104a that can be held with the foot portion of the screw 2 interposed therebetween, and a slit 104b for obtaining spring properties at the center in the longitudinal direction. Is formed so that it can be sandwiched and held by the circular portion 104a from both sides like a tweezers in the circular neck lower part of the cross section of the screw 2. The circular portion 104a is opened at the tip so that it can be easily inserted into the circular neck lower portion of the cross section, and the circular portion 104a is inserted into the neck lower leg portion of the screw 2 by inserting the opening of the circular portion 104a. The screw 2 is picked and held on the inner surface. In this case, the inner surface of the circular portion 104a is provided with a stepped portion so that the screw 2 is difficult to fall off.

  Here, the extraction operation of the screw 2 will be further described. First, from the state where the screw 2 is raised with respect to the wide surface of the terminal 5 together with the washer 3, the tip portion of the holding jig 103 is passed through the notch 65A of the ceiling portion 64 of the unit 6A as shown in FIG. The washer 3 is pushed down to the position of the terminal 5 together with the screw 2 by pressing on the L-shaped portion 35 of the washer 3. At this time, the neck of the screw 2 is lifted from the washer 3 as shown in FIG. The tip opening portion of the screw holding jig 104 is inserted into the foot portion under the neck of the screw 2, and the screw 2 is picked by the inner surface of the circular portion 104a. Next, as shown in FIG. 4 (b), the screw 2 is once lifted upward in the unit space, and the foot tip portion of the screw 2 is removed from the screw holding hole 4 of the washer 3. Further, as shown in FIG. 4C, the screw holding jig 104 is used to remove the screw 2 from the tip end portion of the foot. In this manner, only the washer 3 is easily pressed from above by the tip flat portion of the holding jig 103, and the screw 2 is quickly and easily held by the screw holding jig 104, so that the screw holding hole 4 of the washer 3 is held. The screw 2 can be removed quickly and easily and reliably. As a result, when replacing the screw such as when the screw 2 is blurred, etc., when the terminal block is installed at a high density, etc., each unit 6A may be detached from the rail, or the screw 2 may be short-circuited. The possibility of causing an accident at the time of start-up by dropping on a certain circuit part is further eliminated.

  In this manner, the holding jig 103 and the screw holding jig 104 are used to hold the screw 2 quickly and easily with the screw holding jig 104 while holding only the washer 3 with the holding jig 103. The screw 2 can be lifted up by the screw holding jig 104 and the screw 2 can be quickly and easily extracted from the screw holding hole 4.

  Next, in order to press only the washer 3 from above, the driver 101 and the holding jig 103 are used. However, the present invention is not limited to this, and as an example different from the above example, an L-shaped presser as shown in FIG. A jig 105 can be used. In this case, the L-shaped holding jig 105 is inserted into the washer 3 with a notch 105a cut into a U-shape with a large opening so as to avoid the head of the screw 2 and the flat washer 21. When only the washer 3 is pressed by the holding jig 105, the screw 2 is lifted, the screw 2 is pinched by the screw holding jig 104, and once lifted, the screw 2 is removed from the screw holding hole 4 and replaced. Can do.

  That is, the operation of extracting the screw 2 will be further described. First, from the state in which the screw 2 is raised with respect to the wide surface of the terminal 5 together with the washer 3, the screw 2 is pressed down from above by the driver 101, and the tip portion of the holding jig 105 as shown in FIG. The U-shaped notch 105a is inserted while avoiding the head of the screw 2 and the flat washer 21, and the washer 3 is pressed downward to push the washer 3 down to the position of the terminal 5. At this time, the neck of the screw 2 is lifted from the washer 3 as shown in FIG. The lower part of the neck of the screw 2 is held by the screw holding jig 104, and the screw 2 is once lifted upward in the unit space as shown in FIG. The screw is removed from the screw holding hole 4 and removed outward from the foot tip portion of the screw 2 with a screw holding jig 104 as shown in FIG. In this manner, only the washer 3 can be pressed from above by the U-shaped notch 105 a at the tip of the pressing jig 105, and the screw 2 can be extracted from the screw holding hole 4 of the washer 3. As a result, when replacing the screw such as when the screw 2 is blurred, each unit 6A is detached from the rail, or the screw 2 is dropped on another circuit part that has a risk of short-circuit, causing an accident at the start-up. The fear of is eliminated.

  In this case, the cutout portion 65A of the ceiling portion 64 of the unit 6A is not necessary, but although the upper portion of the terminal block is vacant, only the washer 3 is further pressed by the holding jig 105 while pressing the head of the screw 2 with a screwdriver. And removing the screw 2 by using the screw holding jig 104 from the same lateral direction as that of the holding jig 105 is particularly difficult when the terminal block is installed in a highly dense manner. Therefore, as described above, the notch portion 65A is formed in the ceiling portion 64 of the unit 6A, and the screw wrench 102 or the screw holding jig 104 is used to hold the screw while holding only the washer 3 using the driver 101 or the holding jig 103. The workability is better when the screw 2 is pulled out, the risk of dropping the screw 2 is less, and the screw 2 can be pulled out more quickly and easily and reliably. Furthermore, if the structure of this invention is used, the unit height of the terminal block 1 can also be made still lower.

  In the above embodiment, in the screw-up type terminal block 1A, the notch portion 65A for inserting the member (tool or jig) for pressing only the washer 3 is provided in the ceiling portion 64 of the unit 6A. Not limited to this, as shown in FIG. 7, as the screw-up type terminal block 1B, a protrusion 64C on the back side of the notch 65B of the unit 6B and a notch 65B of the adjacent unit 6B are fitted. In combination, a cutout portion having a size equivalent to that of the cutout portion 65A may be formed. In this case, the notch portion 65B can be formed in the mold drawing direction as compared with the notch portion 65A, and the mold structure can be simplified.

  In the above-described embodiment, a tool such as a screwdriver, which will be described later, is provided at the central portion in the depth direction of the ceiling portion 64 where the central upper surface of the unit 6A is a flat portion 66 for placing a symbol plate (not shown). In addition, a rectangular or partially circular cutout portion 65A for pressing the washer member 31 through the tip portion (rectangular section, square, or circle) of the holding jig of the screw extraction jig is opened to the hole 64A side. Is formed.

  The flat washer 21 of the screw 2 is received by the rib-like screw holding portion 63 by the urging force of the compression spring 8, but in addition to or separately from this, the pan-like head of the screw 2 is placed inside the hole. In order to easily open and fix the peripheral portion, a screw holding portion having a hole with an inner diameter slightly smaller than the outer diameter of the pan-shaped head of the screw 2 may be provided in the ceiling portion of the unit 6A. Further, the unit 6A may be provided with a screw holding portion that holds the washer 3 against the urging force of the compression spring 8 and holds the washer 3 from above. As a result, the flat washer 21 and / or the head of the screw 2 is urged by the urging force of the compression spring 8 in a state where the screw 2 is removably attached to the screw holding hole 4 of the washer 3 (the state is not crimped). It can be received and held by the screw holding portion together with the washer 3. A notch equivalent to the notch 65A for inserting a member (tool or jig) for pressing only the washer 3 can be formed on the ceiling 64 of the unit 6A of the screw-up type terminal block. .

  Moreover, in the said embodiment, although the compression spring 8 was used in order to raise the washer 2 with the screw 2, it is not restricted to this, You may use the coil spring 9 as shown in FIGS. 8 to 10 show a case where there is one coil spring 9 in the middle of the unit 6A. In addition to the compression spring 8 and the coil spring 9, the spring for screw-up may be a spring of another form as long as it can achieve a screw-up function, such as a helical spring or a leaf spring. What is necessary is just to form the notch part equivalent to the notch part 65A for inserting the member (tool or jig | tool) which presses only the washer 3 in the ceiling part 64 of the unit 6A of such a screw-up type terminal block.

  Furthermore, in the present embodiment, the washer 3 is configured as shown in FIGS. 15 and 16. However, for example, when the compression spring 8 is contracted, the support member 32 of the washer 3 is arranged so as to fit in the unit 6A or 6B. You may comprise the slit which extended the vertical groove of the cut-and-raised part to a lower end. In this case, the slit width needs to be a groove width smaller than the outer diameter of the compression spring 8 so that the compression spring 8 is not sucked into the slit. A vertical recess may be provided on the unit 6A or 6B side to accommodate a part of the compression spring 8 so as to face the slit.

  As mentioned above, although this invention has been illustrated using preferable embodiment of this invention, this invention should not be limited and limited to this embodiment. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and the common general technical knowledge from the description of specific preferred embodiments of the present invention. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  The present invention, for example, in a terminal block as a wiring relay and branching device used in switchboards such as nuclear power plants, thermal power plants and substations, control panels and monitoring panels, etc. When connecting, the screw is fastened easily and reliably by moving (up) the screw together with the washer in the direction perpendicular to the terminal surface while the screw is rotated and removed from the screw hole of the terminal. In the field of screw extraction jigs used when replacing screws, such as screw terminals for screw-up type terminal blocks and screw-up type terminal blocks, it is possible to quickly and easily press only the washer from above using a holding tool or the holding jig. Thus, the screw can be quickly and easily extracted accurately from the screw holding hole of the washer.

It is a perspective view at the time of seeing the example of a principal part structure of the screw up type terminal block which concerns on one Embodiment of this invention from diagonally upward. (A)-(e) is a figure for demonstrating the screw extraction operation | work at the time of using a general tool in the screw up type terminal block of FIG. It is a perspective view which shows the screw extraction jig | tool which concerns on one Embodiment of this invention. (A)-(c) is a figure for demonstrating the screw extraction operation | work at the time of using the screw extraction jig | tool of FIG. 3 in the screw up type terminal block of FIG. It is a perspective view which shows the screw extraction jig | tool which concerns on other embodiment of this invention. (A)-(c) is a figure for demonstrating the screw extraction operation | work at the time of using the screw extraction jig | tool of FIG. 5 in the screw up type terminal block of FIG. It is a perspective view at the time of seeing the modification of the screw-up type terminal block of FIG. 1 from diagonally upward. (A) is the top view which shows the state which assembled | assembled the screw of FIG. 1, the washer, and the spring which show other embodiment at the time of using a coil spring instead of a compression spring, (b) is the side view. It is a side view which shows the state which the spring contracted in FIG.8 (b). It is a partial front view of the screw up type terminal block of other embodiment which shows the state which integrated the screw, washer, and spring of FIG.8 (b) into the unit. It is a front view which shows the principal part structural example of the conventional screw up type terminal block currently disclosed by patent document 1. FIG. It is a perspective view at the time of seeing the screw-up type terminal block of FIG. 11 from diagonally upward. It is a perspective view at the time of seeing the screw up type terminal block of FIG. 11 from diagonally downward. It is a side view which shows the state which assembled the screw, washer, and compression spring of FIG. FIG. 15 is a top view of FIG. 14. FIG. 15 is a perspective view of FIG. 14. It is a principal part enlarged view for demonstrating the taper shape of the L-shaped projection member of FIG. In FIG. 11, it is a principal part enlarged view for demonstrating the state which extracts a screw from a washer.

Explanation of symbols

1A, 1B Screw-up type terminal block 2 Screw 3 Washer 31 Washer member 32 Support member 35 L-shaped part 4 Screw hole 5 Terminal 6A, 6B Unit 63 Screw holding part 64 Ceiling part 64A, 64B hole 65A, 65B Notch part 66 Flat part 7 Nut 8 Compression spring 9 Coil spring 101 Driver 102 Radio pliers 103, 105 Holding jig 105a Notch part 104 Screw holding jig 104a Circular part 104b Slit

Claims (5)

In the screw-up type terminal block in which the screw is raised together with the washer by the urging force of the spring with one end attached to the washer when the screw tip is removed from the screw hole of the terminal by rotating the screw.
In a state where the screw is removably attached to the screw holding hole of the washer, at least one of the washer means attached to the neck portion of the screw and the head portion of the screw by the biasing force of the spring. A screw holding portion is provided that can be received and held, and the screw holding portion is provided in a unit composed of an insulating member that holds the washer, the screw, and the terminal, and the tool is passed through a tool or a jig to the unit. A screw-up type terminal block provided with a washer pressing hole for pressing the washer. The screw holding portion is configured by a part or all of a hole that can be held by receiving the screw head and / or the washer means, and the washer pressing hole is the hole or the partial hole side. The screw-up type terminal block according to claim 1, wherein the screw-up type terminal block is configured by a notch portion opened to the top.   The screw-up type terminal block according to claim 1 or 2, wherein the screw holding portion can further receive and hold the washer by an urging force of the spring.   The screw-up type terminal block according to claim 1 or 2, wherein the screw holding portion is formed in a ceiling portion of the unit, and the washer pressing hole is formed in the ceiling portion.   The washer includes a washer member having the screw retaining hole and a support member connected to the washer member in an L-shape, and the spring is attached to the support member, The screw-up type terminal block according to claim 1 or 2, wherein the hole is provided corresponding to a position where the hole can be pressed onto the L-shaped portion of the washer through a tool or a jig.

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