JP4532955B2 - Screwed member - Google Patents

Description

The present invention relates to a branch line that connects between a bus bar used for a distribution board and a branch switch.

A conventional screwed member is as shown in FIG. This is one in which a screw connection portion 6e is provided at one end of the bar body 6 in the figure, and the screw connection portion 6e has a bifurcated shape so that a screw passes so as not to interfere with a screw thread.

The bar body 6 is a bar body of a branch bar connected to the other terminal 4b of the breaker 4 used in the distribution board. As shown in FIG. 4, the branch bar of the present invention has one end of the bar body 6 as a connection end 6 a to the terminal 4 b of the breaker 4, and an inclined portion 6 b in the height direction at a position near the other end of the bar body 6. A screw connection portion 6c with the N-phase bus bar 2 is provided. Further, a screw connection portion 6e connected to the L2 phase bus bar 3 or the L1 phase bus bar 1 when the bar body 6 is turned over is provided at the tip of the screw connection portion 6c. An inclined portion 6d in the height direction is also provided between the screw connection portion 6c and the screw connection portion 6e.

When the voltage is switched using the branch bar body 6, for example, when the branch bar 6 fixed to the L2 phase in FIG. 8 is fixed to the N phase (that is, when changing from the 200V specification to the 100V specification). First, the terminal screw of the breaker 4 is loosened, the screw of the screw connection portion 6e fixed to the bus bar is loosened and removed, and then the bar body 6 is once removed and turned upside down. Then, the screw connection portion 6c is aligned with a predetermined screw hole position of the N-phase bus, held with a finger, and then screwed to the N-phase bus at the position 6c, and the terminal screw of the breaker is tightened and fixed. To do. In addition, since the distribution board is usually attached to the wall surface, work is performed toward the wall.

As described above, the screw connection portion is provided with a screw connection portion through which the screw is passed so as not to interfere with the screw thread, thereby constituting a branch bar, that is, a screwed member.
JP-A-10-150706 (Nos. 0007, 0009, 4)

However, in this conventional screw stop member, the screw connection portion is provided so as to escape the screw thread so as not to interfere with the screw thread at the screw connection portion. It is necessary to hold the screw once removed, and when attaching the branch bar upside down from the original state, the screw cannot be held when reattaching the screw. There was a problem that it was easy to do.

Since multiple branch breakers are usually provided, the branch bars are densely packed in the vertical direction toward the wall surface, hold the branch bar with one hand in a narrow work space, and tighten with a screwdriver while attaching the screw with the other hand. It was difficult to do the work itself, making the work difficult. It is an object of the present invention to provide a screwed member that can temporarily hold a screw that has been passed through a screw penetrating part, that prevents the screw from dropping and losing when screwed, and that can reduce labor during screw tightening. It is aimed. Hereinafter, the screw is referred to as a screw.

To solve the above problems,
According to a first aspect of the present invention, there is provided a screw stop member to be screwed to the bus bar, which forms a branch line connecting the bus bar used for the distribution board and the branch switch, and a screw in the screw stop member. A part of the peripheral part of the penetrating part protrudes inwardly of the screw penetrating part formed by plastically deforming a part of the screw penetrating part in the thickness direction by pressing the peripheral part with a convex member. The screw thread engaging portion is provided, and when the screw fixing member is screwed and fixed to the bus bar, the screw thread engaging portion is screwed through the screw penetrating portion so that the screw thread engaging portion is threaded on the screw thread. And a screw retaining member having a screw penetrating portion , wherein the screw is temporarily held .

According to the first problem-solving means of the present invention, in the screwed member, a screw is characterized in that a part of the screw penetration portion is provided with a plastic deformation portion so as to hold the screw in a loose state. Since the screw-fastening member having the penetrating portion is provided, the screw can be temporarily held in the screw penetrating portion by the partially plastic deformation portion, and the screw is screwed when the screw-fastening member is screwed. It is possible to improve workability because it is not lost by being dropped from the member. In addition, there is an effect that the screw can be temporarily held without a possibility that the screw thread is crushed by engaging a part of the plastic deformation part protruding in the inner direction of the peripheral part of the screw penetration part with the screw thread.

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. Reference numeral 1 denotes a screwed member having a screw penetrating portion 101 at one end. Four plastic deformation portions 102 formed by plastic deformation of the peripheral portion are provided at the peripheral portion of the screw penetration portion 101. The plastic deformation portion 102 is formed by coining processing (coining processing) or staking processing (crushing processing), and protrudes inward of the screw penetration portion 101 by pressing the peripheral portion with a convex member. Is provided.

FIG. 2 shows an AA cross-sectional view of the screwed member 1. By pressing the peripheral portion of the screw penetration portion 101 described above, that is, slightly outside the screw penetration portion 101 with a convex member, the screw penetration portion 101 is partially plastically deformed so as to project inwardly. Yes. Further, as shown in the drawing, also in the thickness direction of the screw retaining member 1, only a part of the screw penetrating portion 101 is formed so as to protrude inside. The protruding end portion indicated by 102a in the figure is a thread-engagement portion, which meshes with the thread and temporarily holds the screw.

The four screw thread engaging portions 102a provided at the four locations have a diameter of the concentric circle when the portion projected on the innermost side is viewed as a point on the concentric circle with the screw penetrating portion 101 (the dimension of the thread to be penetrated ( It is configured to protrude so as to be substantially the same as or slightly smaller than the diameter. It should be noted that the degree of holding becomes stronger if the structure is made slightly smaller.

FIG. 3 shows a view in which the screw 3 is temporarily held by the screw stop member 1. In addition, the screw stop member has shown the AA cross section similarly to FIG.

When the screw 3 is passed through the screw penetration portion 101 of the screw-fastened member 1, the distance L between the screw thread engaging portions 102a shown in the figure is substantially the same as the screw dimension (diameter). The screw thread and the screw thread engaging portion 102a come into contact with each other, so that the screw 3 is held.

Since only a part of the plastic deformation portion 102 protrudes in the thickness direction of the screw retaining member 1 when the screw is passed, the screw is in a loose state with a slight degree of freedom. It is held and does not fit tightly when passing the screw, and the screw thread is not crushed.

When the screwed member 1 configured as described above is used as a voltage switching bar of a distribution board, that is, a branch line, the operation at the time of voltage switching becomes very simple. 4 and 5 show the state of use at the time of voltage switching using a distribution board bus as a screw stop member.

In FIG. 4, 2 is a screw stop member and represents a bus-bar in this case. The to-be-screwed member 1 is screwed to the screw-fastening member 2 by screws 3.

In FIG. 5, 4 is a branch breaker provided in the distribution board. The branch switch 4 is supplied with electric power from the bus line through the branch line. 401 and 402 are terminal parts of the branch switch. Reference numerals 201 to 203 denote buses, 201 denotes an L1 phase, 202 denotes an L2 phase, and 203 denotes an N phase. 110, 120, and 130 are branch lines that connect each bus to the branch switch, 110 is a first branch line that connects the L1 phase bus and the branch switch, and 120 is an L2 phase bus and the branch switch. The second branch line 130 connects the N-phase bus and the branch switch.

First, the branch switch 4 is connected to the terminal part 401 via the N-phase bus 203 and the third branch line 130, and is connected to the terminal part 402 via the L2 phase bus 202 and the second branch line 120. In other words, it is assumed that 100V is being used.

When voltage switching is performed from this state, the third branch line 130 connected to the terminal portion 401 of the branch switch 4 is temporarily removed, and the first branch line 110 connected to the L1 phase bus 201 is connected to the terminal. It is necessary to reconnect to the unit 401. In this case, when the first branch line 110 is disposed at a predetermined position and fixed with screws, the screw 3 is passed through the first branch line 110, that is, the screw penetration part 101 of the screw fixing member 1 in advance. First, the first branch line 110 is disposed at a predetermined position with one hand, and the screw is tightened and fixed with a screwdriver with the other hand. Since the distribution board is usually provided on the wall surface or the like, the voltage switching operation is performed toward the wall surface. However, since the screw 3 is temporarily held by the branch line (screw-fastened member), the branch line As compared with the case where the screw tightening operation is performed with a screwdriver while holding both the screw and the screw by hand, the branch line can be arranged and the screw fixing operation can be performed easily and reliably. As described above, according to the member to be screwed of the present invention, it is possible to prevent the screw from dropping or losing without crushing the screw thread, and to greatly improve the workability.

FIG. 6 shows a second embodiment of the present invention. Reference numeral 5 denotes a screw stop member, and a screw penetration portion 501 provided at one end thereof is divided into two forks. Two plastic deformation portions are provided as indicated by 5b and 5c in the figure.

The plastic deformation portions 5b and 5c are formed by coining (coining) or staking (crushing) as in the first embodiment, and press the peripheral edge of the screw penetration portion 501 with a convex member. By doing so, it is provided so as to project inwardly of the screw penetration part 501. Since the cross-sectional shape of the plastic deformation portion is the same as that of the first embodiment, the description thereof is omitted.

The screw passed through the screw penetrating portion 501 is held by the plastic deformation portions 5b and 5c provided at two locations and the contact portion indicated by 5a in the drawing. The holding space formed by being surrounded by 5a, 5b, and 5c is provided with a plastic deformation portion so as to be formed so as to be substantially the same size or slightly smaller than the size (diameter) of the thread to be penetrated.

When one end of the branch line used for the distribution board is formed in this way, compared to the case where the screw penetrating part is formed of a round hole, the shape of the screw is directed toward the open end of the fork. Although it is easy to slip off, the screw is properly held because the plastic deformation part is provided. As described above, in the same way as in the first embodiment, it is possible to prevent the screws from being dropped or lost in the connecting work of the branch line at the time of voltage switching, and to greatly improve the workability at the time of voltage switching. Is.

In the screw-fastened member, a part of the plastic penetrating part is provided in the screw penetration part so as to hold the screw in a loose state. Therefore, not only the screw but also a rivet or the like is temporarily held and fixed at a predetermined position. It can also be used when performing. Moreover, although the branch line used for the distribution board is shown, to the screwed member to be fixed by using a screw or the like, for example, to the screwed member made of resin, not limited to the support metal and the holding metal, other metals. Can also be used.

It is a 1st Example which shows the to-be-screwed member of this invention. It is sectional drawing of a to-be-threaded member. It is the figure which hold | maintained the screw. It is the figure which showed the use condition of the to-be-screwed member. It is the figure which showed the use condition of the to-be-screwed member. It is a 2nd Example which shows the to-be-threaded member of this invention. It is a figure which shows a prior art example. It is a usage figure of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw stop member 101 Screw penetration part 102 Plastic deformation part 102a Screw meshing part 110 1st branch line 120 2nd branch line 130 3rd branch line 2 Screw stop member 201 L1 phase bus line 202 L2 phase bus line 203 N phase Busbar 3 Screw 301 Screw thread 4 Branch switch 401 Terminal portion 402 Terminal portion 5 Screw stop member 501 Screw penetration portion 5a Contact portion 5b Plastic deformation portion 5c Plastic deformation portion

Claims (1)

A screwed member to be screwed to the busbar, which forms a branching line connecting the busbar used for the distribution board and the branching switch,
The peripheral part of the screw penetration part in the screw stop member is formed by plastically deforming a part in the thickness direction of the member in the screw penetration part by pressing the peripheral part with a convex member. A screw thread engaging portion protruding inwardly of the screw penetration portion is provided,
By passing the screw through the screw penetrating portion when screwing and fixing the screwed member to the bus bar,
A screw retaining member, wherein a screw thread engaging portion meshes with a screw thread of the screw and temporarily holds the screw.