JP4116972B2 - Screw-up type terminal block - 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. A screw-up type terminal block that facilitates screw fastening work 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. About.

  This type of screw-up type terminal block is disclosed in, for example, Patent Documents 1 and 2, as shown in FIGS.

  As shown in FIGS. 12 and 13, the screw-up type terminal block 100 includes a screw 101 with a washer and a terminal 103 having a screw hole 102 for fastening at the other end of a metal plate having one end formed on a faston tab. A unit 104 formed of an insulating member that holds the terminal 103 and guides the screw 101 with a washer in a direction perpendicular to the terminal 103 so as to be movable (up and down), and a screw with respect to the screw 101 with a washer A compression spring 105 that applies a biasing force to the screw 101 with a washer is provided in a direction (vertical direction) away from the hole 102.

  The screw 101 with a washer is held in a free ring state in the hole of the terminal 103 by caulking the screw after passing the screw from the tip portion into the screw holding hole of the washer. As shown in FIG. 14, this washer is composed of a square washer member 101a having a screw holding hole and a support member 101b continuously provided in an L shape on one side of the washer member 101a. The support member 101b is arranged in a direction perpendicular to the terminal 103, and a compression spring 105 is attached to the tip portion 101c.

  A plurality of units 104 are connected in the thickness direction, and each unit 104 accommodates a screw 101 with a washer, a terminal 103 and a compression spring 105.

  The compression spring 105 is disposed at a position below the terminal 103 in the unit 104 and biases the bulging portion 101d in the middle of the support member 101b upward (in the direction away from the screw terminal 103).

  With the above configuration, when the screw 101 with the washer is first loosened during periodic maintenance, the tip of the screw 101 with the washer is detached from the screw hole 102 of the terminal 103, and the washer is attached by the urging force of the compression spring 105. Along with the washer of the screw 101, the screw moves (up) in the direction perpendicular to the terminal surface.

  Next, after inserting a crimp terminal with a wire crimped into the gap between the tip of the screw 101 with washer and the screw hole 102 of the terminal 103, the crimp terminal is tightened through the tip of the screw into the hole of the crimp terminal. Is sandwiched between the terminal 103 and the washer of the screw 101 with the washer, thereby connecting the terminal 103 and the electric wire.

Further, in Patent Document 3, in order to prevent a screw with a washer whose screw is crimped to a washer from falling off from a terminal block, a hole exposing the head of the screw and a ring-like shape provided at the peripheral part of the hole are disclosed. It is disclosed that only the outer peripheral edge portion of the washer is pressed downward by the lower protruding portion by attaching a cover provided with the lower protruding portion to the upper surface of the terminal block.
Japanese Utility Model Publication No. 63-18129 (Japanese Utility Model Application Publication No. 58-120567) Japanese Patent Application No.4-11988 Japanese Utility Model Publication No. 5-23426

  However, in the above conventional screw-up type terminal block, the screw of the screw with the washer may fall off the washer and cause a short circuit at the part where the screw has dropped. To prevent this, the screw is caulked to the washer. Installed. In this case, since the washer is appropriately deformed by the caulking pressure and the screw is caulked to the washer, the L-shaped washer is distorted, and the screw with the washer may be a defective product that does not screw up well. On the other hand, when the degree of caulking is loose, the problem of insufficient caulking that the screw can be easily removed from the washer may occur.

  Therefore, it is necessary to manage non-defective products of these screws with washers, and the caulking process itself is an indispensable process.

  The present invention solves the above-mentioned conventional problems, and provides a screw-up type terminal block that can always hold a screw, which is inserted into and removed from the screw holding hole of the washer, into the washer without using caulking.

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 a screw-up type terminal block, a washer attached to the neck of the screw by the biasing force of the spring in a state where the screw is detachably attached to the screw holding hole of the washer without using caulking. Means and a screw holding portion capable of receiving and holding at least one of the screw heads, thereby achieving the above object. In this case, the screw and the washer can be separated without using caulking.

  Moreover, the screw holding part in the screw-up type terminal block of the present invention is constituted by a part or all of a round hole capable of receiving and holding the head of the screw.

  Furthermore, the screw holding part in the screw-up type terminal block of the present invention further receives and holds the washer by the biasing force of the spring.

  Furthermore, the screw holding part in the screw-up type terminal block of the present invention is formed in the ceiling part of the unit made of the insulating member for holding the washer, the spring-loaded screw, and the terminal.

  Furthermore, 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 to the washer member in an L shape, and the spring is attached to the support member. Is attached.

  Furthermore, in the screw-up type terminal block of the present invention, an L-shaped protruding member is further provided on the back side of the supporting member, and the tip of the protruding member is shaped to face the longitudinal direction of the supporting member. One end of the spring is fitted into the protruding member.

  Further, the washer support member in the screw-up type terminal block of the present invention is formed with a longitudinal slit facing the protruding member, and the width of the slit is smaller than the outer diameter of the spring. .

  Further, when the washer and the spring-loaded screw in the screw-up type terminal block of the present invention are incorporated in a unit made of an insulating member, a recess for accommodating the spring is formed at the position of the unit facing the slit. ing.

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

  In the present invention, the screw holding portion that allows the screw washer means and / or the head to be held by the biasing force of the spring with the screw being detachably attached to the screw holding hole of the washer is screwed up. It is provided on the type terminal block. Thereby, the screw attached to the screw holding hole of the washer so as to be freely inserted and removed can be always held in the washer without using the caulking process as in the prior art.

  Further, since a spring for screw-up is arranged on the back side of the support member of the L-shaped washer, the spring length can be made longer, so the number of turns of the spring can be increased and the spring diameter can be reduced. can do. For this reason, the spring accommodating space in the unit can be greatly reduced.

  As described above, according to the present invention, the screw holding that allows the screw washer means and / or the head to be held by the biasing force of the spring while the screw is removably mounted in the screw holding hole of the washer. Since the portion is provided on the screw-up type terminal block, the screw that is removably attached to the screw holding hole of the washer can be always held on the washer without using caulking as in the conventional case.

  Moreover, since the spring for screw-up is arrange | positioned in the back side of the supporting member of a L-shaped washer, the spring accommodation space in a unit can be reduced significantly.

  Embodiments of a screw-up type terminal block and a manufacturing method thereof according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing a configuration of a main part of a screw-up type terminal block according to an embodiment of the present invention, FIG. 2 is a perspective view of the screw-up type terminal block of FIG. It is a perspective view at the time of seeing the screw up type terminal block of FIG. 1 from diagonally downward.

  1 to 3, a screw-up type terminal block 1 is formed by externally fitting 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 capable of holding the head, a terminal 5 having a screw hole 4 for fastening at one end of a strip-shaped metal strip, and this terminal 5 A unit 6 made of an insulating member that holds and guides the screw 2 in a direction perpendicular to the terminal 5 together with the washer 3 (up / down) and a hexagonal hole in the unit 6 below the screw hole 4 of the terminal 5. A direction in which one end is inserted into a protruding portion provided on the back of the L-shaped washer 3 and a nut 7 that is housed and allows the screw 2 to be screwed through the screw hole 4 (in a direction away from the screw hole 4 ( The washer 3 is urged in a direction perpendicular to the wide surface of the terminal 5. And a reduced spring 8.

  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. 4 to 6, the washer 3 is composed of a rectangular washer member 31 having a screw holding hole and a support member 32 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. 4), 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. 7, the L-shaped projecting portion 33 is tapered so that the tip portion thereof becomes thinner, and has a tapered shape, ensuring the stability of the compression spring 8 when the spring is compressed. 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. .

  Conventionally, the screw and the washer are caulked so that the screw does not fall off from the washer. However, in this embodiment, the screw 2 and the washer 3 are not caulked, and the screw 2 holds the washer 3 from the tip portion of the screw 2. Only the head of the screw 2 is held by the screw holding hole of the washer 3 through the hole. 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 on the ceiling portion of the unit 6, and a rib is provided for fixing 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. ing.

  Since the compression spring 8 is disposed behind the washer 3 and has a spring length, the outer diameter of the spring can be reduced. Therefore, the space of the spring portion can be reduced, and the outer diameter of the spring is smaller than that of the conventional spring. Since a large number can be taken, the spring sag can be reduced as compared with the conventional spring.

  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 2 At the same time, the washer 3 is lowered against the urging force of the compression spring 8 and is tightened against the nut 7 below the screw hole 4 through the tip of the screw 2 in the hole of the crimp terminal, and the crimp terminal is connected with the terminal 5 and the washer 3. Sandwich. Thereby, the terminal 5 and an electric wire are electrically connected.

  Here, if the screw 2 is tilted together with the washer 3 with respect to the unit 6 and the terminal 5 as shown in FIG. The screw 2 can be easily extracted from the service 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.

  As described above, according to the above-described embodiment, the screw-up type terminal block that raises the screw 2 together with the washer 3 in a 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. 1, a screw holding portion 63 that allows the flat washer 21 of the screw 2 to be received and held by the urging force of the compression spring 8 in a state in which the screw 2 is simply inserted into and removed from the screw holding hole 4 of the washer 3. Are provided as ribs on the ceiling of the unit 6 of the screw-up type terminal block 1. For this reason, without using caulking as in the prior art, it is possible to always hold the screw 2 that is simply mounted in the screw holding hole of the washer 3 without being removed from the washer 3 and the flat washer 21.

  In the above-described embodiment, 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 the pan of the screw 2 A screw holding portion having a hole with an inner diameter slightly smaller than the outer diameter of the pan-like head of the screw 2 is provided in the ceiling portion of the unit 6 in order to easily open and fix the head portion at the inner peripheral edge of the hole. You may do it. Further, the unit 6 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.

  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. 9 to 11 show a case where there is one coil spring 9 in the middle of the unit 6. 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.

  Furthermore, in the present embodiment, the washer 3 is configured as shown in FIGS. 5 to 6. However, for example, when the compression spring 8 is contracted, the washer 3 is cut in the support member 32 so that the washer 3 can be settled. You may comprise the slit which extended the vertical groove of the raising part to the 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 6 side so as to face the slit in order to accommodate a part of the compression spring 8.

  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. A screw-up type terminal that moves (ups) the screw together with a washer to facilitate screw fastening in the direction perpendicular to the terminal surface when the screw is rotated and removed from the screw hole of the terminal. In the field of the table, it is possible to always hold the screw attached to the screw holding hole of the washer so that it can be inserted and removed without using caulking.

It is a front view which shows the principal part structure of the screw up type terminal block which concerns on one Embodiment of this invention. It is a perspective view at the time of seeing the screw-up type terminal block of FIG. 1 from diagonally upward. It is a perspective view at the time of seeing the screw up type terminal block of FIG. 1 from diagonally downward. It is a side view which shows the state which assembled | assembled the screw of FIG. 1, a washer, and the compression spring. FIG. 5 is a top view of FIG. 4. FIG. 5 is a perspective view of FIG. 4. It is a principal part enlarged view for demonstrating the taper shape of the L-shaped projection member of FIG. In FIG. 1, it is a principal part enlarged view for demonstrating the state which extracts a screw from a washer. (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.9 (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 of FIG.9 (b), the washer, and the spring in the unit. It is a perspective view of the conventional screw up type terminal block. It is a front view of the screw-up type terminal block of FIG. It is a perspective view which shows the state which incorporated the compression spring in the screw with a washer of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw up type terminal block 2 Screw 3 Washer 31 Washer member 32 Support member 33 L-shaped projection member 4 Screw hole 5 Terminal 6 Unit 61 Wall member 62 Rib member 63 Screw holding part 7 Nut 8 Compression spring 9 Coil spring

Claims (10)

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.
The washer means attached to the neck of the screw by the urging force of the spring in a state where the screw is detachably attached to the screw holding hole of the washer without using caulking , and the head of the screw A screw-up type terminal block provided with a screw holding portion that can receive and hold at least one of the portions.   2. The screw-up type terminal block according to claim 1, wherein the screw holding portion is configured by a part or all of a round hole capable of receiving and holding a head portion of the screw.   The screw-up type terminal block according to claim 1 or 2, wherein the screw holding portion further receives and holds the washer by an urging force of the spring.   The screw-up type terminal block according to any one of claims 1 to 3, wherein the screw holding portion is formed on a ceiling portion of a unit made of an insulating member that holds the washer, the spring-loaded screw, and the terminal.   The said washer has the washer member which has the said screw holding hole, and the support member connected with this washer member in L shape, The said spring is attached to this support member. Screw-up type terminal block.   An L-shaped projecting member is further provided on the back side of the support member, the tip of the projecting member is shaped to face the longitudinal direction of the support member, and one end of the spring is formed on the projecting member. The screw-up type terminal block of Claim 5 currently fitted.   The screw-up type terminal block according to claim 6, wherein the protruding member is tapered in a tapered shape.   The screw-up type terminal according to claim 5 or 6, wherein a vertical slit facing the protruding member is formed in the support member, and the width of the slit is smaller than the outer diameter of the spring. Stand.   The screw-up according to claim 8, wherein when the washer and the spring-loaded screw are incorporated in a unit made of an insulating member, a recess for accommodating the spring is formed at a position of the unit facing the slit. Type terminal block. The screw-up type terminal block according to claim 1, wherein the screw and the washer are separable without using the caulking process.

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