JP3023325U - Fixed terminal block - Google Patents

Abstract

(57) [Abstract] [PROBLEM] The present invention provides a fixed terminal block that is easy to remove, with a reduced number of steps by providing an engraved portion 10 on the fitting portion of the conductor 1 with the fixing bolt 2 to reduce the number of steps. The purpose is to do it. [Structure] A long and slender conductor 1 having a pair of left and right holes h
A fixing bolt 2 inserted into each hole, a plate-shaped portion of a round terminal 4, a flat washer 6 and a spring washer 7 are sequentially fitted into each bolt and screwed with a nut 8. In the formula type terminal block, in the hole h of the conductor 1,
The fixing bolt 2 to which the inner tooth washer 3 is fitted is inserted from the back surface thereof, and a plurality of engraved portions 10 are formed on the peripheral side of the upper surface, which is a structural feature.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a fixed terminal block having round terminals connected at both ends, in particular, a hole of a conductor and a bolt base for fixing the terminals.

[0002]

[Prior art]

 The structure of a conventional fixed terminal block of this type will be described with reference to FIGS. 4 and 5 showing respective side views. FIG. 4 shows an example of a conventional type terminal. In the figure, 1 is an elongated plate-shaped conductor provided with screw holes h for mounting fixing bolts 2 to be described later in the vicinity of both sides thereof, and 3 and 3 ′ are fixed to the rear surface of the conductor by fixing bolts 2. The inner tooth washer or the spring washer, 4 is provided with a plate-shaped connecting terminal, one of which is fitted to the fixing bolt 2, and the other is provided with a tubular portion, to which the electric wire 5 is connected. Reference numeral 7 denotes a flat washer in contact with the upper surface of the connection terminal, 7 denotes a spring washer in contact with the upper surface of the washer, and 8 denotes a nut screwed to the fixing bolt 2 to crimp and fix the round terminal to the conductor.

[0003]

[Problems of conventional technology]

 Next, FIG. 5 shows a conventional type and a different example. The same parts as those shown in FIG. 4 described above are designated by the same reference numerals, and only the different structure will be described. 3 shows a silver brazing portion for welding between the back surface of the and the head of the fixing bolt 2.

[0004]

[Problems of conventional technology]

 However, in the configuration shown in FIG. 4 described above, when the nut 8 tightened from the upper side after assembly is returned due to inspection or the like, the fixing bolt 2 itself has the plate-shaped portion of the conductor 1 and the round terminal 4. Co-rotation may occur due to the frictional force of the flat washer 6 or the spring washer 7 and the nut 8, and as a result, there is a gap between the upper surface of the fixing bolt 2 and the spring washer 3'or the internal tooth washer 3. [Refer to the arrow in FIG. 4], the so-called idling occurs and the nut 8 has to be removed with difficulty. On the other hand, in the configuration shown in FIG. 5, silver brazing eliminates the idle rotation that occurs in the configuration shown in FIG. 4 described above. The formation of the silver brazing portion 9 is expensive. Moreover, the metal material in the relevant part of the conductor 1 is blunted by heating during brazing, and further loosening occurs when the conductor bar of the round terminal 4 is tightened. The mechanical strength is reduced, which causes inconvenience.

[0005]

[Problems to be solved by the device]

 The present invention is intended to eliminate the drawbacks of the crevice as much as possible. The purpose of the present invention is to provide an engraved portion 10 on the fitting portion of the electric conductor 1 with the fixing bolt 2 to reduce the number of steps. The purpose is to provide a fixed terminal block that is inexpensive and easy to remove.

[0006]

[Means for solving the problem]

 According to the present invention, an elongated conductor 1 having a pair of left and right holes h, a fixing bolt 2 inserted into each hole, a plate-shaped portion of a round terminal 4, a flat washer 6, In the fixed terminal block of the type in which the spring washers 7 are sequentially inserted and screwed with the nut 8, the internal tooth washer 3 is inserted into the hole h of the conductor 1 from the back surface thereof. It is characterized in that the fixing bolt 2 is inserted and a plurality of engraved portions 10 are formed on the peripheral side of the upper surface thereof.

[0007]

[Action]

 As shown in FIG. 3 as an enlarged cross-sectional view of a main part, in the present invention, by forming a plurality of engraved portions 10 on the periphery of the insertion portion of the fixing bolt 2 formed on the conductor 1, the engraved portions are formed by the engraved portions. The conductor is crushed to become a concave portion, and the crushed portion acts to press and deform the base portion of the screw portion of the fixing bolt 2 to increase the return torque of the portion and maintain a strong fixed state.

[0008]

【Example】

 FIG. 1 is a partially cutaway side view of the fixed terminal block of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged plan view of an essential part of an insertion portion of a fixing bolt formed on a conductor. 4, the same parts as those of the conventional type described in FIG. 5 are denoted by the same reference numerals to avoid redundant description, and only the structural features of the present invention will be specifically described. An engraved portion formed on the circumferential side of the hole h through which the fixed bolt 2 is inserted, and 11 indicates a concave portion formed in the portion due to the formation of the engraved portion 10. Incidentally, FIGS. Only the body 1 and the fixing bolts 2 inserted through the body 1 are shown. The fixing bolts have the same structure as the conventional type, so that the inner tooth washer 3 is brought into contact with the back surface of the conductor 1 and the upper surface thereof. The plate-shaped part of the round terminal 4, the flat washer 6 and the spring washer 7 are inserted respectively, and finally the nut 8 is screwed. It is fixed me.

[0009]

[Effect of this plan]

 The present invention has a ridged structure, and the operation and effect based on the structure of the present invention will be described. As shown in FIG. 1, an internal tooth washer 3 is fitted to a fixing bolt 2 and the fixing bolt is attached to a hole h of a conductor 1. As shown in FIG. 2, a plurality of engraved portions 10 are formed on the peripheral side of the screw portion of the fixing bolt 2 in the state that the engraved portions are inserted into the recesses. Then, the deformed portion strongly adheres to the screw portion of the fixing bolt 2, that is, the screw portion is strongly tightened by the plural deformed portions from the peripheral side. It is necessary to maintain a sufficient return torque at the relevant portion, and therefore, there is no co-rotation at the time of removing the nut 8 as described in the conventional type, and as a concrete forming means, Since only the formation of the stamped portion 10 is completed, it is possible to continuously perform the press work. The number of manufacturing steps is small and the cost is low. Moreover, since the engraved portion 10 is slightly larger than the mounting hole of the round terminal 4, the contact surface between the conductor 1 and the round terminal 4 does not decrease, Since the engraved portion 10 is partially performed on the circumferential side of the hole h formed in the conductor 1 without causing any problem in conductivity, the portion concerned does not rise and the fixing bolt 2 is An excellent action and effect that can sufficiently achieve the intended purpose of the present invention, such as acting to reduce the gap between the screw portion and the hole h of the conductor 1, can be expected.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of the fixed terminal block of the present invention,

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged plan view of an essential part of an insertion portion of a fixing bolt formed on a conductor.

FIG. 4 shows an example of a conventional type,

FIG. 5 shows a conventional type “different example”,

[Explanation of symbols]

 1 Conductor 2 Fixing bolt 3 Internal tooth washer 3'Spring washer 4 Round terminal 5 Electric wire 6 Flat washer 7 Spring washer 8 Nut 9 Silver brazing part 10 Engraved part 11 Recessed hole

Claims (1)

[Scope of utility model registration request] 1. An elongated conductor 1 having a pair of left and right holes h, a fixing bolt 2 inserted in each hole, a plate-shaped portion of a round terminal 4 and a flat washer 6 in each bolt. In a fixed terminal block of a type in which a spring washer 7 and a spring washer 7 are sequentially inserted and screwed with a nut 8, a fixing bolt having an inner tooth washer 3 fitted from the back surface thereof into the hole h of the conductor 1. Two
A fixed terminal block having a plurality of engraved portions 10 formed on the periphery of the upper surface thereof.