JP3773202B2 - Terminal block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block, and more particularly to a terminal block suitable for use in a component to which a motor power supply of an electric vehicle is connected.
[0002]
[Prior art]
In order to supply a large current to a motor of an electric vehicle, there is a terminal block using a bus bar for connection between the motor and a power supply device. For example, FIG. 6 is an enlarged vertical cross-sectional view of a main part of a motor in which the inverter and the motor are electrically connected by a terminal block disposed in the motor housing. As shown in FIG. 6, the terminal block 1 is formed by insert-molding three nuts 3 and 4 arranged in a row on the mutually orthogonal surfaces of the main body portion 2 injection-molded with synthetic resin. There are three (three pairs) connection parts. Hereinafter, although a pair of connection part shown in a figure is demonstrated, other connection parts also have the same structure. Both nuts 3 and 4 are disposed so that both end portions 5a and 5b of a substantially L-shaped bus bar 5 are opposed to each other, and are further covered with a cover 6 to be electrically insulated. The terminal block 1 is fixed inside the motor housing 8 with bolts 7.
[0003]
A connection terminal 11 is fixed to an end portion of each electric wire 10 wound in three phases on a stator 9 of a three-phase inverter motor. The connection terminal 11 is one end which is a vertical surface of the bus bar 5. 5a is overlaid and tightened with a bolt 12 and a nut 4 to be electrically connected. A connection terminal 15 is fixed to the tip of the three-phase inverter cable 14 connected to the inverter box 13. The outer periphery of the connection terminal 15 is resin-molded in a substantially cylindrical shape to form an insulating member 16. A packing 18 such as an O-ring is mounted on the outer peripheral surface of the insulating member 16, and is fitted into an insertion hole 8 a provided in the motor housing 8 and sealed.
[0004]
The connection terminal 15 is overlapped with the other end 5 b that is a horizontal plane of the bus bar 5, and is tightened with the bolt 19 and the nut 3 to be electrically connected. That is, the inverter cable 14 is electrically connected to the electric wire 10 of the stator 9 via the bus bar 5. The same applies to the other two not shown, and they are electrically connected via the bus bar 5.
[0005]
The connection procedure between the inverter box 13 and the motor stator 9 is as follows. After fixing the terminal block 1 with the bolt 7 inside the motor housing 8, the connection terminal 11 of the stator 9 is connected to the bus bar 5 with the bolt 12 and the nut 4. The cover 20 is attached by fastening to the one end 5a. Next, one end of the inverter cable 14 is inserted together with the connection terminal 15 from the insertion hole 8 a of the motor housing 8, the connection terminal 15 is overlapped with the other end 5 b of the bus bar 5, and is fixed by tightening with the bolt 19 and the nut 3. Then, the cover 21 is attached to complete the connection work.
[0006]
Further, there is disclosed a device that uses a bus bar in a large current circuit that supplies a large current power to a motor of a hydraulic control unit mounted on an automobile and is connected to other devices to reduce the size of the device (for example, , See Patent Document 1). However, the bus bar disclosed in Patent Document 1 is used for the purpose of downsizing the hydraulic control unit, and is completely different from the present invention.
[0007]
[Patent Document 1]
JP 2001-122105 A (page 4-8, FIG. 1)
[0008]
[Problems to be solved by the invention]
As shown in FIG. 6, the electric wire 10 of the stator 9 has a certain degree of flexibility, and can follow this even if the connection position with the bus bar 5 is slightly changed. On the other hand, the end portion of the inverter cable 14 has high rigidity because the insulating member 16 is formed by resin molding. Further, since the packing 18 is fitted into the insertion hole 8a provided in the motor housing 8 for sealing, the position (particularly in the height direction) of the connection terminal 15 is fixed.
[0009]
Further, the nut 3 (the same applies to the nut 4) of the terminal block 1 is fixed to the main body 2 by insert molding, press fitting, heat welding, ultrasonic welding, or caulking. Accordingly, when the terminal block 1 is fixed to the motor housing 8, the relative position between the other end 5 b of the bus bar 5 and the connection terminal 15 due to variations in the height dimension of the terminal block 1, variations in the processing position of the insertion hole 8 a, and the like. In particular, the height may vary.
[0010]
When the height of the nut 3 (the upper surface of the other end 5b of the bus bar 5) of the terminal block 1 is higher than the connection terminal 15 of the inverter cable 14 inserted from the insertion hole 8a, the connection terminal 15 interferes with the side surface of the bus bar 5. As a result, there is a problem that the workability of the assembly is deteriorated or the assembly is difficult. In extreme cases, the connection terminal 15 and the bus bar 5 may be deformed or damaged.
[0011]
In order to avoid the above-described problem, when a gap is provided between the upper surface of the other end 5b of the bus bar 5 and the connection terminal 15, when the connection terminal 15 is tightened by the bolt 19, the connection terminal 15 and the insulating member 16 are inclined. Thus, there is a possibility that a gap is generated between the packing 18 and the insertion hole 8a and the waterproof property is impaired. In addition, the generated distortion may cause troubles such as destruction of the constituent members and loosening of the fastening portions. In order to prevent these problems, it is necessary to process the height of the nut 3 fixed to the terminal block 1 and the height of the insertion hole 8a with high accuracy. Moreover, since the nut 3 is fixed to the main body 2 by insert molding, press fitting, heat welding, ultrasonic welding, caulking, or the like, a dedicated device or a dedicated tool is required for production. Moreover, many man-hours were required for the assembly, and there was a problem that the production cost was high.
[0012]
The present invention has been made in view of the above-described problems, and the object thereof is to absorb the difference in height even when there is a difference in height between the terminal block (bus bar) and the connection terminal. Providing a terminal block that can be fixed without causing distortion in the terminal, insulation member, or terminal block, preventing performance deterioration such as waterproofness due to distortion and destruction of components, and improving assembly workability There is to do.
[0013]
[Means for Solving the Problems]
In order to achieve the above-described object, the terminal block according to claim 1 of the present invention includes a bus bar provided with at least two connection portions that are electrically connected to connection terminals arranged in the conductive path. A terminal block comprising: a terminal block main body for holding a first tightening member for tightening and electrically connecting the connection terminal to the connection portion of the bus bar; and a second tightening member tightened to the first tightening member. There,
The bus bar is formed on a surface where contact surfaces of the connection portion that contacts the connection terminal intersect each other, and the terminal block body holds the bus bar movably in a predetermined direction, in correspondence with the connecting portion, a first clamping member disposed at different the tightening directions, Ru comprises a clamping member accommodating chamber movably accommodated in a direction intersecting with each said clamping direction or the fastening direction In addition, the terminal block main body has a main body portion formed with a receiving groove for receiving the bus bar in a state where one surface of the bus bar is open, and is attached to the main body portion to cover the open surface of the bus bar and move the bus bar. It is characterized by comprising a cover that can be held .
[0014]
According to the terminal block configured as described above, the bus bar arranged so that the contact surfaces of the connecting portions provided at least two intersect each other is held by the terminal block main body so as to be movable in a predetermined direction, Since the first tightening members arranged corresponding to the connecting portions with the tightening directions different from each other are accommodated in the tightening member accommodating chamber of the terminal block body so as to be movable in the tightening direction or the direction intersecting the tightening direction. Even if the height of the bus bar is different from the height of the connection terminal, the bus bar and the first tightening member move in the tightening direction. As a result, the difference in height can be absorbed, and the bus bar and the connection terminal can be securely tightened in a state of being in contact with each other. At this time, the other first tightening member is accommodated in the tightening member accommodating chamber so as to be movable in a direction crossing the tightening direction of the first tightening member, so that it does not hinder the movement of the bus bar.
[0015]
Therefore, by setting the height of the bus bar to be lower than the height of the connection terminal, the side of the connection terminal can be prevented from interfering with the bus bar during assembly, greatly improving the workability of the assembly. Can be made. In addition, there is no distortion or excessive force acting on the bus bar or connection terminal due to tightening, so the connection terminal is electrically connected to the bus bar without deteriorating the performance such as waterproof performance. Can be fixed. Moreover, since an excessive force does not act on the terminal block, the connection terminal, etc., it is possible to prevent the connection terminal and the bus bar from being deformed or damaged.
[0016]
Moreover, since the 1st clamping member is only inserted in the clamping member accommodation chamber, it is also possible to insert by hand and assemble | attach a terminal block. Therefore, as compared with the case where the first fastening member is fixed to the main body by insert molding, press-fitting, heat welding, ultrasonic welding, or caulking, no special processing device, equipment, etc. are required and manufactured. Cost can be reduced.
In addition, since the terminal block main body is composed of the main body portion and the cover, the bus bar can be held movably with simple shaped parts, and the component parts can be manufactured at low cost.
[0017]
A terminal block according to a second aspect of the present invention is the terminal block according to the first aspect, wherein the terminal block is opposed to the first tightening member accommodated so as to be movable in a direction intersecting a tightening direction by the tightening member. The connecting portion of the bus bar arranged as described above is provided with holding means for holding the first tightening member and moving the first tightening member in a direction crossing the tightening direction as the bus bar moves. It is characterized by that.
[0018]
According to the terminal block having the above configuration, the holding means for holding the first tightening member is provided at the connection portion of the bus bar arranged to face the first tightening member movable in the direction crossing the tightening direction, and the holding means Since the first tightening member held by is moved in the direction intersecting the tightening direction together with the movement of the bus bar, the relative position between the connecting portion and the first tightening member does not change even if the bus bar moves. Therefore, regardless of the position of the bus bar, the second fastening member can be fastened to the first fastening member, and the connection terminal can be fastened to the connection portion. That is, the connection procedure to the connection portions disposed at two or more locations is not limited, and the assembly can be performed from either of them, the connection work efficiency can be greatly improved, and the maintenance is facilitated.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a terminal block according to the present invention will be described in detail with reference to the drawings.
[0022]
1 is a perspective view of a terminal block according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the terminal block, FIG. 3 is a longitudinal sectional view of the terminal block with the bus bar in the lower position, and FIG. FIG. 5 is a view showing a state in which the first tightening member is held by a protrusion which is an example of a holding means provided at the connection portion of the bus bar and moved in a direction crossing the tightening direction. FIG.
[0023]
As shown in FIGS. 1 and 2, the terminal block 50 includes a bus bar 51, a terminal block main body 56 including a main body 52 and a cover 53, a square nut 54 as an example of a first tightening member, 2 is provided with a bolt 55 which is an example of a fastening member. The bus bar 51 is manufactured, for example, by bending a conductive metal plate having a thickness of 2 mm and a width of 10 mm into a substantially L shape, and both ends thereof are further bent at right angles to form surfaces orthogonal to each other. A connecting portion 51a having a contact surface 51e and a connecting portion 51b having a contact surface 51f in the vertical direction are formed.
[0024]
Bolt holes 51c and 51d through which the bolts 55 are inserted are provided in the respective connection portions 51a and 51b. On the back surface of the connecting portion 51b formed as a vertical surface in FIG. 2, two protrusions 51g, which are an example of a holding means, are formed by vertically punching a conductive metal plate. As shown in FIG. 5, the protrusion 51g is configured to hold a square nut 54B between the two protrusions 51g.
[0025]
The main body 52 is manufactured in a substantially L shape by injection molding a synthetic resin having electrical insulation performance, and three L-shaped receiving grooves 52a are formed in parallel on the surface side. The width of the accommodation groove 52a is slightly wider than the width of the bus bar 51, for example, 10.5 mm, and the depth is slightly deeper than the thickness of the bus bar 51, for example, 2.5 mm. Each housing groove 52a accommodates the bus bar 51 along the groove shape.
[0026]
On the back side corresponding to the upper end of each housing groove 52a, a rectangular box-shaped fastening member housing chamber 52b having an open surface on the upper side is formed. The tightening member housing chamber 52b is arranged to face the connecting portion 51a when the bus bar 51 is housed in the housing groove 52a. The hole size of the tightening member accommodating chamber 52b is slightly larger than the size of the square nut 54A, the depth is, for example, about 2 mm deeper than the thickness of the square nut 54A, and accommodates the square nut 54A with the female screw 54a facing upward. It is configured to be able to. That is, the square nut 54A cannot be rotated in the tightening member accommodating chamber 52b, but is accommodated so as to be movable in the vertical direction (the tightening direction of the square nut 54A).
[0027]
In addition, a rectangular box-shaped fastening member accommodation chamber 52c having an open surface in the horizontal front is formed at the lower end of each accommodation groove 52a. The tightening member housing chamber 52c is disposed so as to face the connecting portion 51b when the bus bar 51 is housed in the housing groove 52a. The hole dimensions of the tightening member accommodating chamber 52c are substantially the same as the width and thickness of the square nut 54B, but the height is formed to be, for example, about 2 mm larger than the height of the square nut 54B. The square nut 54B can be accommodated with the front facing forward.
[0028]
That is, the square nut 54B cannot be rotated and moved in the front-rear direction in the tightening member accommodating chamber 52b, but is accommodated so as to be movable in the vertical direction (direction intersecting the tightening direction of the square nut 54B). Further, a partition wall 52g is provided so as to protrude forward between the respective tightening member accommodation chambers 52c, and is configured to be isolated while being electrically insulated from each other.
[0029]
Between the three receiving grooves 52a of the main body 52, two T-shaped grooves 52d are provided in the vertical direction in parallel with the receiving grooves 52a. Further, side walls 52e projecting from the rear to the front are formed on both side surfaces of the main body 52, and locking grooves 52f opened downward are respectively formed on the side walls 52e. Further, a mounting arm 52h protruding rearward is formed on the back surface of the main body 52, and two mounting bolt holes (not shown) into which a collar (not shown) is inserted are formed in the mounting arm 52h. And the positioning hole 52i is provided. Then, a positioning hole 52i is fitted into a boss formed in the motor housing 8 to be described later, and the two bolts are inserted into the mounting bolt holes and fixed to the motor housing 8.
[0030]
As shown in FIGS. 1 and 2, the cover 53 is mounted on the surface side of the main body 52 and covers the open surface of the bus bar 51 accommodated in the accommodation groove 52a for electrical insulation. Thus, a synthetic resin having electrical insulation performance is formed by injection molding into a substantially L-shaped cross section including a vertical wall 53a and a horizontal wall 53b along the shape of the main body 52. Two T-shaped ribs 53c are formed on the back surface of the vertical wall 53a at a position facing the T-shaped groove 52d of the main body 52, and are fitted in the T-shaped groove 52d of the main body 52. Yes.
[0031]
A side wall formed by being bent backward from both sides of the vertical wall 53a is provided with a flexible cantilever arm 53d extending upward from below. The cantilever arm 53d is provided with a locking projection 53e that includes a tapered surface that gradually goes outward from the bottom to the top and a horizontal surface that is formed continuously with the tapered surface.
Insulating walls 53f hanging downward are formed on both sides of the horizontal wall 53b of the cover 53, and together with the horizontal wall 53b and the partition wall 52g of the main body 52, a square nut 54B housed in the fastening member housing chamber 52c, a bolt 55 etc. are comprised.
[0032]
As the square nuts 54 (54A, 54B) and the bolts 55, known nuts and bolts can be used. The nuts are not limited to the square nuts 54, and may be hexagonal nuts, for example. In this case, the shape of the fastening member accommodating chambers 52b and 52c is appropriately modified according to the shape of a hexagon nut or the like.
[0033]
The operation of this embodiment will be described. As shown in FIGS. 1 to 3, the terminal block 50 according to the embodiment of the present invention includes the bus bar 51 after inserting the square nuts 54 (54 </ b> A, 54 </ b> B) into the six fastening member receiving chambers 52 b, 52 c, respectively. Is placed along the groove shape of the receiving groove 52a. Next, the T-shaped rib 53 c of the cover 53 is fitted into the T-shaped groove 52 d of the main body 52, and is slid downward to cover the main body 52. When the tapered surface of the locking projection 53e comes into contact with the upper end of the side wall 52e, the cantilever arm 53d is elastically deformed inward according to the tapered surface. When the horizontal surface of the locking projection 53e eventually reaches the locking groove 52f, the cantilever arm 53d is restored by the elastic force, and the horizontal surface of the locking projection 53e and the lower surface of the locking groove 52f are engaged to attach the cover 53. Is completed, and the terminal block 50 is completed.
[0034]
As shown in FIG. 4, the bus bar 51 of the terminal block 50 is not constrained anywhere and can freely move about 2 mm in the vertical direction. Further, as shown in FIG. 5, the rectangular nut 54B housed in the fastening member housing chamber 52c and oriented in the horizontal direction is sandwiched between the two protrusions 51g at the upper and lower surfaces thereof. As the bus bar 51 moves up and down, the bus bar 51 moves in a direction (up and down direction) intersecting the tightening direction of the square nut 54B. Accordingly, the bolt hole 51d of the bus bar 51 and the center of the female screw 54a of the square nut 54B always coincide with each other.
[0035]
Next, an example in which an inverter and a motor are connected using the terminal block 50 described above will be described with reference to FIG. The conventional terminal block 1 and related parts shown in FIG. 6 will be described as being replaced with the terminal block 50 and related parts of this embodiment. The terminal block 50 is positioned by fitting a positioning hole 52 i to a boss (not shown) formed in the motor housing 8, and the two bolts 7 are inserted into the mounting bolt holes and fixed to the motor housing 8.
[0036]
The connection terminal 11 of the stator 9 of the three-phase inverter motor is superposed on the contact surface 51f of the connection portion 51b of the bus bar 51 and the bolt 55 is screwed into the square nut 54B and tightened to electrically connect the contact surface 51f and the connection terminal 11 electrically. The cover 20 is attached.
[0037]
Next, one end of the inverter cable 14, which is an example of a conductive path, is inserted from the insertion hole 8 a of the motor housing 8 together with the connection terminal 15, so that the connection terminal 15 faces the connection portion 51 a of the bus bar 51. At this time, the height of the upper surface of the connection portion 51a of the bus bar 51 is set to be lower than the height of the lower surface of the connection terminal 15, that is, a gap of about 1 mm is provided between the connection portion 51a and the connection terminal 15, for example. Since it is set so that it can be performed, the connection terminal 15 does not interfere with the connection portion 51a, and can be easily assembled.
[0038]
When the bolt 55 is rotated by being screwed into the square nut 54A via the connection terminal 15 and the bolt hole 51c of the connection portion 51a, the square nut 54A is pulled up together with the bus bar 51 along with the rotation (see FIG. 4). The contact surface 51e of the connection part 51a and the connection terminal 15 are securely in contact with each other, and are tightened and electrically connected. At this time, the bus bar 51 is movably held by the terminal base body 56, and the connection terminal 11 of the stator 9 is only connected to the connecting portion 51b disposed below, so that the movement of the bus bar 51 is obstructed. There is nothing to do and it can be pulled up easily. Then, the cover 21 is attached and the connection work is completed.
[0039]
As described above, since the connection between the connection terminal 15 and the bus bar 51 is performed by moving the bus bar 51 and the square nut 54A in the tightening direction of the square nut 54A, an excessive force acts on the connection terminal 15 and the insulating member 16. Therefore, the sealing performance by the packing 18 is not deteriorated, and the connection terminal 15 and the terminal block 50 are not deformed or damaged.
[0040]
Note that the connection procedure described above may be reversed. That is, first, the connection terminal 15 and the connection portion 51 a are fixed with the bolt 55. As the bus 55 rotates, the bus bar 51 is pulled up to a position where it contacts the connection terminal 15 together with the square nut 54A, so that the connection portion 51b is also raised. At this time, since the square nut 54B is sandwiched between the two protrusions 51g, the tightening member accommodating chamber 52c in the direction (vertical direction) intersecting the tightening direction of the square nut 54B as the bus bar 51 moves. Move in. Therefore, the bolt hole 51d of the bus bar 51 and the center of the female screw 54a of the square nut 54B are always coincident, and the connection terminal 11 can be easily attached to the connection portion 51b.
[0041]
In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
[0042]
Further, in the present invention, the holding means has been described as two protrusions formed on the bus bar, thereby holding the square nut, but is not limited thereto, for example, caulking, The square nut may be fixed to the bus bar by welding, crimping, or the like, or the bus bar may be subjected to burring to directly process the female screw on the bus bar.
[0043]
【The invention's effect】
As described above, according to the terminal block of the first aspect of the present invention, the bus bars arranged so that the contact surfaces of the connecting portions provided at least two intersect each other can be moved in a predetermined direction. The terminal block main body is held in such a manner that the first tightening members arranged in different tightening directions corresponding to the connection portions can be moved in the tightening direction or the direction crossing the tightening direction. It was accommodated in the fastening member accommodating chamber of the base body. Thereby, even if the height of the bus bar and the height of the connection terminal are different, the bus bar and the first tightening member move in the tightening direction, so that the difference in height is absorbed and the bus bar and the connection terminal are securely connected. It can be tightened in contact. At this time, the other first tightening member is accommodated in the tightening member accommodating chamber so as to be movable in a direction crossing the tightening direction of the first tightening member, so that it does not hinder the movement of the bus bar.
[0044]
Therefore, by setting the height of the bus bar to be lower than the height of the connection terminal, it is possible to avoid the side surface of the connection terminal from interfering with the bus bar at the time of assembly, thereby greatly improving the workability of the assembly. be able to. In addition, there is no distortion or excessive force acting on the bus bar or connection terminal due to tightening, so the connection terminal is electrically connected to the bus bar without deteriorating the performance such as waterproof performance. Can be fixed. Moreover, since an excessive force does not act on the terminal block, the connection terminal, etc., it is possible to prevent the connection terminal and the bus bar from being deformed or damaged.
[0045]
Moreover, since the 1st clamping member is only inserted in the clamping member accommodation chamber, it is also possible to insert by hand and assemble | attach a terminal block. Therefore, as compared with the case where the first fastening member is fixed to the main body by insert molding, press-fitting, heat welding, ultrasonic welding, or caulking, no special processing device, equipment, etc. are required and manufactured. Cost can be reduced.
In addition, since the terminal block main body is composed of the main body portion and the cover, the bus bar can be held movably with simple shaped parts, and the component parts can be manufactured at low cost.
[0046]
According to the terminal block of the second aspect of the present invention, the first tightening member is held at the connection portion of the bus bar arranged to face the first tightening member movable in the direction intersecting the tightening direction. And holding the first fastening member held by the holding means in a direction crossing the fastening direction along with the movement of the bus bar. Therefore, even if the bus bar moves, the connection portion and the first fastening member are moved. The relative position does not change. Therefore, regardless of the position of the bus bar, the second fastening member can be fastened to the first fastening member, and the connection terminal can be fastened to the connection portion. That is, the connection procedure to the connection portions disposed at two or more locations is not limited, and the assembly can be performed from either of them, the connection work efficiency can be greatly improved, and the maintenance is facilitated.
[Brief description of the drawings]
FIG. 1 is a perspective view of a terminal block according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of FIG. 1;
FIG. 3 is a longitudinal sectional view of a terminal block with a bus bar at a lower position.
FIG. 4 is a longitudinal sectional view of a terminal block with a bus bar in an upper position.
FIG. 5 is an enlarged vertical cross-sectional view of a main part showing a state in which a first tightening member is held by a protrusion that is an example of a holding means provided in a connection portion of a bus bar and moves in a direction crossing the tightening direction.
FIG. 6 is an enlarged vertical sectional view of a main part of a motor in which an inverter and a motor are electrically connected by a conventional terminal block.
[Explanation of symbols]
50 Terminal block 51 Bus bar 51a, 51b Connection part 51e, 51f Contact surface 51g of a connection part Protrusion part (holding means)
52 Body 52a Housing grooves 52b, 52c Tightening member housing chamber 53 Cover 54 (54A, 54B) Square nut (first fastening member)
55 Bolt (second tightening member)
56 Terminal block

Claims (2)

A bus bar provided with at least two connection portions that are electrically connected to connection terminals disposed in the conductive path, and a first tightening member that tightens and electrically connects the connection terminals to the connection portions of the bus bar. A terminal block comprising a terminal block main body holding the second tightening member fastened to the first tightening member,
The bus bar is formed on a surface where the contact surfaces of the connection portions that contact the connection terminals intersect with each other,
The terminal block main body holds the bus bar so as to be movable in a predetermined direction, and corresponds to the connection portion of the bus bar, and the first tightening members arranged with the tightening directions different from each other, respectively. Rutotomoni comprising a clamping member accommodating chamber movably accommodated in a direction crossing the tightening direction or the fastening direction,
The terminal block main body has a main body portion formed with an accommodation groove for accommodating the bus bar in a state where one surface of the bus bar is opened, and is attached to the main body portion so as to cover the open surface of the bus bar and move the bus bar. A terminal block comprising a cover for holding .   The bus bar is moved while holding the first tightening member at the connection portion of the bus bar disposed opposite to the first tightening member accommodated so as to be movable in a direction intersecting the tightening direction by the tightening member. The terminal block according to claim 1, further comprising a holding unit that moves the first tightening member in a direction crossing the tightening direction.

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