JP2006004733A - Terminal connection structure using bolts and electrical junction box provided with the same - Google Patents

Abstract

An object of the present invention is to prevent a bolt from loosening or falling off in a state where a bolt is temporarily tightened to a terminal connecting nut.
A terminal connection structure using a bolt in which a nut 23 is provided in an insulating block 15 and a bolt 11 is screwed into the nut and the terminal 1 and the other terminal portions 27a and 28a are tightened and connected, adjacent to the nut. Then, a bolt temporary fixing member 24 is provided on the insulating block, and the bolt temporary fixing member has a bolt insertion portion 24a having a diameter smaller than the thread diameter of the bolt. The member 24 for temporarily fixing the bolt is disposed on the bolt through surface 23 c side of the nut 23. The bolt temporary fixing member 24 was formed of a synthetic resin material. The terminal 1 has a bolt insertion slot 10 and a wide opening 9 communicating with each other, and an insulating block 15 has a locking portion 20 engaged with the opening. An electric junction box J having a terminal connection structure using the bolts was adopted.
[Selection] Figure 3

Description

  The present invention relates to a terminal connection structure using a bolt for screwing and connecting a terminal and another circuit by attaching a terminal in a state where the bolt is temporarily tightened, and finally tightening with the bolt, and an electric connection box including the terminal connection structure It is about.

  FIG. 5 shows an embodiment of an electrical junction box having a conventional terminal connection bolt (see Patent Document 1).

  The electrical connection box 61 is composed of a main connection box 62 and a sub-connection box 63, and a round terminal 65 with an electric wire on the side of the sub-connection box is connected to a fusible link 64 for power supply on the side of the main connection box with a bolt 66. Tightening connection.

  The fusible link 64 has a pair of plate terminals. Each plate terminal is fastened to each bus bar 67 with a bolt 66, and each bus bar 67 is connected to a plurality of other fusible links 68 on the main connection box side. .

  The bus bar 67 is formed by punching and bending a conductive metal plate in a band shape, and has a tab terminal for the fusible link 68 and a plate portion for connection to the plate terminal of the fusible link 64 for power supply.

  The bolt 66 passes through a hole between the plate terminal of the fusible link 64 and the connecting plate, and is fastened and fixed with a nut (not shown). The nut is previously attached to the box body 69 made of synthetic resin inside the pair of tab terminals of the fusible link 64. The bolt 66 is fastened to the nut with an impact wrench 70.

  The main connection box 62 has a plurality of relay mounting parts 73 in addition to the fusible link mounting parts 71 and 72, and the sub-connection box 63 has a plurality of relay mounting parts 74.

  FIG. 6 shows one form of a conventional terminal connection structure using bolts (see Patent Document 2).

  A fusible link 76 is mounted in a box portion of a holder 75 made of synthetic resin, and a bolt 77 passes through a hole of one plate terminal 78 of the fusible link 76 in an extension portion (insulating block) 86 of the holder 75 to the inside. The bolts 77 are temporarily tightened to the nuts 79 and the heads of the bolts 77 are lifted from the plate terminals 78. In this state, the terminal 80 with the electric wire is attached along the bolt 77, and the terminal 80 is connected to the plate terminal 78 of the fusible link 76 by tightening the bolt 77.

  The terminal 80 includes a substantially U-shaped plate portion 82 having a slot 81, a frame-like portion 83 raised at the front end of the plate portion 82, and an electric wire connecting portion 84 that follows the plate portion 82, The shaft portion of the bolt 77 engages in the slot 81 while the frame portion 83 passes through the head of the bolt 77.

The holder 75 is provided with a holding spring portion (not shown) for temporarily fixing the terminal 80 and a locking piece 85. The bolt 77 is finally tightened in a state where the terminal 80 is temporarily fixed by the spring portion and the locking piece 85. Since the terminal 80 is temporarily fixed horizontally, the bolt 77 is prevented from being obliquely tightened. The holder 75 functions as a part of an electrical junction box (not shown).
Japanese Patent Laid-Open No. 10-247451 (pages 3 to 4, FIG. 1) JP 2002-184299 A (FIGS. 1 and 16)

  However, in the terminal connection structure using the conventional bolt, the electric connection box is attached to the bolt 77 before the terminal 80 is mounted on the holder side or after the terminal 80 is temporarily fixed by the locking piece 85. There is a concern that the bolt 77 may come loose and fall off when transported in a temporarily tightened state.

  As a means for tightly screwing the bolt into the nut so as not to loosen, there is a known method in which the thread of the male thread of the bolt is protruded slightly outward from the normal and is sized to wrap in the valley of the female thread of the nut However, when this bolt is used, metal scraps such as nuts are easily generated when the bolts are tightened, and the scraps may enter the electrical junction box and cause poor contact. was there.

  The present invention has been made in view of the above points, and a terminal connection structure using a bolt that can securely fix a bolt without loosening and that does not cause harmful shavings such as a nut, and an electrical connection including the terminal connection structure The purpose is to provide a box.

  In order to achieve the above object, in the terminal connection structure using a bolt according to claim 1 of the present invention, a nut is provided in the insulating block, and the bolt is screwed into the nut so that the terminal and the other terminal portion are tightened. In the terminal connection structure using the bolt to be connected, a member for temporarily fixing the bolt is provided on the insulating block adjacent to the nut, and the member for temporarily fixing the bolt is smaller in diameter than the thread diameter of the bolt. It has a bolt insertion part.

  With the above configuration, the bolt is screwed into the female screw portion of the nut and the bolt insertion portion of the bolt temporary fixing member at the same time, and the bolt is temporarily fixed in a state in which the bolt is prevented from being rotated (loosened) by the bolt temporary fixing member. The In this state, for example, a terminal having a slot is mounted from a direction orthogonal to the bolt. By fastening the bolt, the terminal and the other terminal part are connected to each other. For example, the terminals are connected in advance to electric wires, and the other terminal portions are connected to bus bars, other electric wires, or the like.

  The terminal connection structure using the bolt according to claim 2 is the terminal connection structure using the bolt according to claim 1, wherein the bolt temporary fixing member is disposed on the bolt through surface side of the nut. And

  With the above configuration, the bolt is first screwed into the nut, penetrates the nut, is screwed into the bolt temporary fixing member, and is simultaneously screwed into the nut and the bolt temporary fixing member. The bolt is smoothly and reliably screwed (screwed) into the bolt insertion portion of the bolt temporary fixing member by the rotational force of the bolt screwed into the nut. The operator screws the nut into the nut with a small force, penetrates the nut, and then screws the bolt into the member for temporarily fixing the bolt with a relatively large force. It is reliably detected by the operator's hand that the bolt has been screwed into the bolt temporary fixing member.

  The terminal connection structure using the bolt according to claim 3 is the terminal connection structure using the bolt according to claim 2, wherein the bolt temporary fixing member is fixed to a bolt through surface of the nut. To do.

  With the above configuration, the bolt fixing member is integrated with the nut, and handling, assembly to the insulating block, and the like are facilitated.

  The terminal connection structure using the bolt according to claim 4 is the terminal connection structure using the bolt according to claim 1 or 2, wherein the bolt fixing member is integrally formed with the insulating block. And

  With the above configuration, the bolt temporary fixing member is formed by integral resin molding on the insulating block, and the nut is disposed above or below the bolt temporary fixing member.

  The terminal connection structure using the bolt according to claim 5 is the terminal connection structure using the bolt according to any one of claims 1 to 4, wherein the member for temporarily fixing the bolt is formed of a synthetic resin material. It is characterized by.

  With the above configuration, the bolt is smoothly screwed in by the lubricity of the synthetic resin material, and the bolt is firmly held by the synthetic resin material having flexibility or elasticity.

  The terminal connection structure using the bolt according to claim 6 is the terminal connection structure using the bolt according to any one of claims 1 to 5, wherein an inner diameter of the bolt insertion portion of the bolt temporary fixing member is It corresponds to the thread root diameter of the bolt.

  With the above configuration, the bolt is easily screwed into the bolt insertion portion of the bolt fixing member by hand, and the bolt is securely held in the bolt insertion portion with the optimum tightening allowance and is prevented from rotating. The bolt fixing member is sufficiently thinner than the nut, and is preferably formed in a plate shape (thin plate shape) with a thickness of, for example, a metal washer. By setting the inner diameter of the bolt insertion portion to the thread valley diameter of various outer diameter bolts, the setting and processing (drilling or resin molding processing) of the inner diameter of the bolt insertion portion is facilitated.

  The terminal connection structure using a bolt according to claim 7 is the terminal connection structure using a bolt according to any one of claims 1 to 6, wherein the terminal communicates a bolt insertion slot with a wide opening. And the insulating block has a locking portion that engages with the opening.

  With the above configuration, in a state where the bolt is temporarily fixed to the bolt temporary fixing member, the terminal is mounted in the radial direction along the bolt and is locked by the locking portion on the insulating block side. The head of the bolt passes through the wide opening of the terminal, and the shaft of the bolt engages in the slot of the terminal. In this state, the bolt is finally tightened with a tool such as an impact wrench, and the terminal and the other terminal portion are tightened and connected.

  An electrical junction box according to an eighth aspect is characterized by including a terminal connection structure using the bolt according to any one of the first to seventh aspects.

  With the above configuration, the terminal is connected to another terminal part, and the other terminal part follows a circuit such as a bus bar in the electrical junction box, and the circuit such as the bus bar is connected to an electrical component such as a fusible link in the electrical junction box. Connected, the electrical components are connected to other circuits in the electrical junction box. As described above, the effect of the terminal connection structure using the bolt according to any one of claims 1 to 7 is achieved in the electrical junction box.

  According to the first aspect of the present invention, since the bolt temporarily tightened to the nut is prevented from rotating by the member for temporarily fixing the bolt, the insulating block and the electric junction box including the same are transferred in a state where the bolt is set. At this time, it is possible to surely prevent the bolt from dropping off due to vibration during transfer, etc., and it is not necessary to reset the bolt, and the connection between the terminal and the other terminal portion can be performed efficiently and reliably.

  According to the second aspect of the invention, the bolt can be smoothly and reliably screwed into the bolt temporary fixing member via the nut, and the temporary fixing workability of the bolt and the reliability of temporary fixing are improved. The certainty of temporary fixing is also improved by the fact that the bolt is screwed into the bolt temporary fixing member with the operator's hand.

  According to the invention described in claim 3, by integrating the member for temporarily fixing the bolt with the nut, handling and assembly to the insulating block can be facilitated, and the member for temporarily fixing the bolt is provided. An inexpensive material can be used.

  According to the invention described in claim 4, by integrally forming the bolt fixing member on the insulating block, the number of parts and the cost can be reduced, and the loss of the bolt fixing member can be surely prevented. This increases the reliability of temporary fixing of the bolt.

  According to the fifth aspect of the present invention, the bolt can be screwed smoothly and surely by the lubricity of the bolt temporary fixing member, and the bolt is fixed by the flexibility or elasticity of the bolt temporary fixing member. It can be firmly fixed firmly, and the workability and reliability of the bolt temporary fixing are improved.

  According to the sixth aspect of the present invention, the bolt can be screwed into the bolt insertion portion of the member for temporarily fixing the bolt manually, and the bolt can be securely fixed temporarily with an appropriate tightening margin. The workability and reliability of temporary fixing are improved.

  According to the seventh aspect of the present invention, by temporarily fixing the bolt with a predetermined protruding length, the terminal can be smoothly mounted without interfering with the bolt, and the terminal mounting workability is improved.

  According to the invention described in claim 8, it is possible to smoothly connect and securely connect the terminal to the electric component such as the fusible link in the electric connection box without interference with the bolt. The mounting workability is improved, and the bolts are surely prevented from dropping into the electrical junction box, and the danger of short-circuiting by the bolts is reliably prevented.

  1 to 3 show one embodiment of a terminal connection structure using a bolt according to the present invention and an essential part of an electric connection box having the terminal connection structure.

  The terminal 1 is bent into a substantially L-shape and is composed of a horizontal plate-shaped front half and a vertical rear half, and the front half is raised from a flat and straight plate portion 2 and from the front end of the plate portion 2. The second half portion has a wire connecting portion composed of a crimping portion 5 for connecting the core wire of the electric wire 7 and a crimping portion 6 for fixing the insulating coating at the portion subsequent to the bent portion 4. Yes.

  The front-end frame-like portion 3 is connected to the horizontal plate portion 2 via a curved bent portion 8 (FIG. 3), and a wide opening (hole portion) 9 is provided inside the frame-like portion 3 so as to widen the opening. Reference numeral 9 denotes a narrow slot 10 at the center in the width direction of the plate portion 2. A head portion 11 a of the bolt 11 is inserted into the wide opening 9, and a shaft portion (male thread portion) 11 b (FIG. 3) of the bolt 11 is inserted into the slot 10.

  A housing portion 14 for the fusible link 13 (FIG. 2) for supplying power is provided inside the synthetic resin junction box body 12 of the electrical junction box J, and a terminal for terminal connection is provided adjacent to the housing portion 14. A stand (insulating block) 15 is integrally provided.

  The terminal block 15 has three vertical walls made of synthetic resin, and one of the walls 16 protrudes higher than the other walls 17, 18. A horizontal wall portion 19 (FIG. 3) continues on the upper end side, and locking claws (locking portions) 20 and stop ribs 21 and 22 for the frame-shaped portion 3 of the terminal 1 are formed on the inner surface of the protruding vertical wall portion 16. A nut 23 (FIG. 3) is provided at approximately the center of the horizontal wall portion 19, and a member 24 (FIG. 3) for temporarily fixing the bolt 11 is provided below the nut 23.

  The locking claw 20 is composed of a claw portion at the tip and a horizontal flexible column portion following the claw portion, and is provided in a pair of left and right sides, inside the left and right vertical sides of the frame-like portion 3 of the terminal 1. Engage with. The stop ribs 21 and 22 are located on the upper side of the locking claw 20 and come into contact with the upper end surface of the horizontal side part on the upper side of the frame-like part 3. In this example, the stop ribs 21 and 22 are arranged corresponding to the left and right ends and the center of the frame-like portion 3.

  The locking claw 20 prevents the terminal 1 from coming out in the horizontal direction, and the stop ribs 21 and 22 prevent the terminal 1 from moving upward. Since the terminal 1 is horizontally disposed perpendicular to the bolt 11 and the tip of an impact wrench (not shown) is in contact with the horizontal plate portion 2 of the terminal 1 and positioned vertically, the bolt 11 is tilted by the impact wrench. Tightening is reliably prevented.

  In the terminal block 15, the upper end surface of the nut 23 (FIG. 3) is slightly protruded from the horizontal wall portion 19, and is in contact with or close to the lower end surface (bolt through surface) 23 c of the flange 23 a on the lower side of the nut 23. Then, a plate-like bolt temporary fixing member 24 is provided, and the bolt temporary fixing member 24 is formed to have an outer diameter (outside width dimension) similar to that of the flange portion 23a of the nut 23, and is used for temporarily fixing the bolt. The member 24 is fitted into the horizontal groove 25 together with the flange 23a of the nut 23, and a bolt insertion hole 26 is provided below the groove 25.

  The nut 23 and the bolt fixing member 24 are, for example, slidably mounted in the groove 25 from the side, and are prevented from rotating in the groove 25. For example, the nut 23 and the bolt temporary fixing member 24 are formed in a rectangular shape, so that the rotation in the groove 25 can be easily prevented.

  The groove portion 25 may be formed straight (horizontally) on the wall portions 26 a on the left and right sides of the bolt insertion hole 26, or formed in a substantially U shape around the bolt insertion hole 26. May be. The nut engaging groove 50 following the upper side of the groove part 25 is also formed in, for example, a substantially U-shape.

  On the upper surface of the nut 23 (FIG. 3), a terminal portion 27 a which is a horizontal extension plate portion of one bus bar 27 in the fusible link housing portion 14 and a terminal portion 28 a which is a horizontal extension plate portion of the other bus bar 28 are provided. And both terminal portions 27a and 28a have bolt insertion holes, the horizontal plate portion 2 of the terminal 1 is disposed on the other terminal portion 28a, and a small gap is formed on the plate portion 2. The head 11a of the bolt 11 is located. The bus bar 28 is locked to the recess 29 of the terminal block 15 by a locking piece 28b.

  The bolt 11 is temporarily tightened in FIGS. 1 to 3, and the terminal 1 is slidably mounted from the side with respect to the temporarily tightened bolt 11, and is attached to the inner side 9 of the frame-like portion 3 of the terminal 1. While the head portion 11a of the bolt 11 is inserted, the shaft portion 11b of the bolt 11 is engaged in the slot 10, and the frame-like portion 3 is locked by the locking claws 20 and the stop ribs 21 and 22 without misalignment. In this state, the bolt 11 is finally tightened. The bolts 11 are tightened with an impact wrench. A circle 30 in FIG. 2 shows a rotation space 30 of the impact wrench.

  The bolt temporary fixing member 24 (FIG. 3) is preferably formed in a plate shape using a synthetic resin such as nylon as a material, and a circular hole having an inner diameter smaller than the thread diameter (outer diameter) of the bolt 11 at the center thereof. Part (bolt insertion part) 24a. The hole 24 a is disposed concentrically (coaxially) with the female screw hole 23 b of the nut 23.

  Nylon, which is a material for the bolt temporary fixing member 24, is also called polyamide, polyimide, or polyamideimide, and has a smaller coefficient of friction than other resin materials, and has wear resistance and self-lubricating properties. Suitable as a stop member.

  For example, the bolt 11 can be easily tightened (temporarily tightened) manually or by a wrench with a soft resin other than nylon, and the bolt 11 can be prevented from rotating by exerting a frictional force with the bolt 11. Any material that can be used can be used. It is also possible to use a push nut as the member 24 for temporarily fixing the bolt. It can be said that these bolt fixing members 24 have flexibility or elasticity.

  The inner diameter of the circular hole 24a of the bolt temporary fixing member 24 is set to a dimension that allows the operator to easily tighten (temporarily tighten) the bolt 11 by manual work or the like and reliably prevent rotation. It is preferred that For example, it is preferable to set the inner diameter of the hole 24 a of the member 24 to the same size as the valley diameter of the male thread of the bolt 11. The shape of the hole 24a is not limited to a circle, and may be an ellipse or a rectangle. It is also possible to cut out part of the inner periphery of the hole 24a in the radial direction.

  No female screw is cut in the hole 24a of the bolt 24 for temporarily fixing, and the surface is a smooth circumferential surface. The bolt 11 is screwed into the nut 23, and the bolt 11 passing through the nut 23 is screwed into the bolt temporary fixing member 24 in the manner of a tapping screw, and the bolt 11 is temporarily inserted in the state of passing through the bolt temporary fixing member 24. Fixed. The bolt 11 is securely screwed (engaged) into the hole 24 a of the bolt temporary fixing member 24 by the momentum (rotational force) screwed into the nut 23.

  The entrance of the hole 24a of the bolt 24 fixing member 24 is tapered and chamfered, and the guide inclined surface 24b makes it easy to bite the tip of the bolt 11 into the hole 24a of the bolt temporarily fixing member 24. . As an example, the plate thickness of the bolt temporary fixing member 24 is approximately the same as the thickness of the flange portion 23a of the nut 23, and has a thickness of, for example, a metal washer that prevents a normal bolt from rotating.

  By tightening the bolt 11, the terminal 1 and the two bus bars 27 and 28 are connected. The terminal 1 is crimped to the electric wire 7, and the electric wire 7 and both bus bars 27 and 28 are electrically connected.

  The two bus bars 27 and 28 are arranged on both sides of the fusible link housing portion 14 and are connected to one terminal of each of the two rows of fusible links 13 (FIG. 2) in the housing portion 14. The connection between the bus bars 27 and 28 and the terminals of the fusible link 13 is performed by fastening together with terminals (LA terminals or round plate terminals) 31 (FIG. 1) with electric wires and horizontal bolts (not shown).

  Each fusible link 13 (FIG. 2) is covered and protected by an upper cover 32, and the upper cover 32 is a vertical wall portion of the fusible link housing portion 14 by locking means such as a locking projection 33 and an engagement frame portion 34. 35. The LA terminal 31 is positioned on the lower side of the vertical wall 35 and is partitioned by a partition wall 36 (FIG. 1). The terminal 1 of this embodiment to be tightened and connected with the temporarily fixed bolt 11 is larger than the LA terminal 31, and the electric wire 7 also uses an insulation coated electric wire thicker than the electric wire 37 on the LA terminal side. The terminal 1 of this embodiment is also a kind of LA terminal.

  On the outer surface of the vertical wall portion 17 of the terminal block 15, a pair of slide engaging portions 38 (FIG. 1) having a substantially L-shaped cross section and a locking arm 39 positioned between them are provided. The connection box main body 12 (FIG. 2) is provided with a guide portion 40 for the slide engagement portion 38 and an engagement protrusion for the locking arm 39, and the fusible link housing portion 14 is integrally formed with the terminal block 15. Are fixed to the junction box body 12 by the fixing means 38, 39, 40. On the outer surface of the junction box main body 12, there is provided a locking portion 42 (FIG. 2) for fixing to the vehicle body or the like.

  FIG. 4 shows an embodiment of an electrical junction box J having a terminal connection structure using the bolt 11.

  The electric junction box J is mounted on a hybrid electric vehicle, and the fusible link accommodating portion 14, the fuse accommodating portion 43, the plurality of relays 44, the connector 45, etc. have. The fusible link 13 is a box type for a large current, and the fuse is a blade type for a small / medium current.

  The terminal 1 is positioned on the terminal block 15 at right angles to the fusible link housing portion 14, and the electric wire 7 following the terminal 1 is led out through the space 46 inside the junction box body 12. The electric wire 7 is for a large current connected to an alternator (alternator), for example.

  The two bus bars connected to the terminal 1 by bolting are arranged vertically along the inner sides of the fusible link accommodating portions 27 and 28 (FIG. 1), and a plurality of bus bars are arranged in two rows in the fusible link accommodating portion. The fusible link 13 is arranged, the bus bars 27 and 28 are connected to one terminal of each fusible link 13, and the other terminal is connected by a terminal with an electric wire or the like (not shown). Is connected to another bus bar circuit 47 following the battery by a wire 48 with a terminal, the bus bar circuit 47 is connected to one terminal of each of the plurality of fuses in the fuse accommodating portion 43, and the other bus bar 28 follows, for example, an alternator. The bus bar circuit 50 is connected by a terminal-attached electric wire 49. Each relay 44 is connected to each auxiliary machine (not shown) such as a lamp, a pump, and an ignition.

  In the above embodiment, the terminal 1 is fastened in the vertical direction with the bolt 11, but it is also possible to tighten the terminal 1 in the horizontal direction with the bolt 11 in a straight shape instead of the L shape. . Also in this case, it goes without saying that the locking claws 20 and the stop ribs 21 and 22 for the terminal 1 and the temporary fixing member 24 (FIG. 3) for the bolt 11 are arranged in different directions.

  It is also possible to use the terminal 1 having the plate part 2 having only the slot part 10 without the frame-like part 3. In this case, the terminal is not locked, or the locking claw for locking the plate portion 2 may be provided perpendicular to the terminal block 15 instead of the locking claw 20.

  Further, it is possible to set the terminal 1 without using the locking claw 20 and the stop ribs 21 and 22 and perform final fastening with the bolt 11. Also in this case, it goes without saying that the bolt 24 fixing member 24 is disposed.

  Further, although a synthetic resin material has been mentioned as the material of the bolt temporary fixing member 24, even when the bolt temporary fixing member 24 is formed of other materials (for example, a metal plate material), a bolt is previously provided in the screw hole. Even if a female screw smaller than the diameter is cut, no harmful shavings are generated, the bolt 11 can be easily tightened manually, etc., and a sufficient frictional force as a detent can be exhibited. Any material can be used. In addition to the flat plate material, the metal plate material may be a plate material having blade pieces around the hole as described in, for example, Japanese Utility Model Laid-Open No. 6-68310.

  Further, the nut 23 and the bolt temporary fixing member 24 may be insert-molded in the synthetic resin terminal block body (15), or the nut 23 and the bolt temporary fixing member 24 may be made of synthetic resin. The terminal block main body (15) may be integrally formed. The nut 23 and the bolt 11 may be made of synthetic resin instead of metal. In particular, by integrally forming the bolt temporary fixing member 24 into the synthetic resin terminal block main body (15), the number of parts and the number of assembling steps are reduced, and the nut is temporarily fixed by the integral bolt temporary fixing member 24. It is supported stably without tilting. It is also possible to provide a bolt 24 temporarily fixing member 24 on the lower end surface (back surface or bolt through surface) 23c of the nut 23 by means of adhesion or attachment.

  It is also possible to arrange the bolt temporary fixing member 24 not on the lower side of the nut 23 (the back side or the rear side in the bolt insertion direction) but on the upper side of the nut 23 (the front side or the front side in the bolt insertion direction). In this case, the bolt 11 is first screwed or pressed into the bolt temporary fixing member 24 and then screwed into the nut 23. However, in this case, the bolt temporary fixing workability is slightly reduced as compared with the case where the bolt 11 is first screwed into the nut 23 and is screwed into the bolt temporary fixing member 24 with the momentum. In either case, the bolt temporary fixing member 24 and the nut 23 are prevented from rotating inside the terminal block 15.

It is a perspective view showing one embodiment of a terminal connection structure using a bolt concerning the present invention. It is a top view which similarly shows the terminal connection structure using a volt | bolt. It is a longitudinal cross-sectional view which similarly shows the terminal connection structure using a volt | bolt. It is a top view which shows one Embodiment of an electrical-connection box provided with the terminal connection structure using a volt | bolt. It is a top view which shows one form of an electrical-connection box provided with the terminal connection structure using the conventional volt | bolt. It is a perspective view which shows one form of the terminal connection structure using the conventional volt | bolt.

Explanation of symbols

1 terminal 9 opening 10 slot 11 bolt 15 terminal block (insulation block)
20 Locking claw (locking part)
23 Nut 23c Lower end surface (Bolt penetration surface)
24 Bolt temporary fixing member 24a Hole (bolt insertion part)
27a, 28a Terminal J Electric junction box

Claims (8)

  In a terminal connection structure using a bolt in which a nut is provided in an insulating block, and a bolt is screwed into the nut and a terminal and another terminal portion are tightened and connected, the temporary block is connected to the insulating block adjacent to the nut. A terminal connection structure using a bolt, wherein a fixing member is provided, and the bolt temporary fixing member has a bolt insertion portion having a diameter smaller than the thread diameter of the bolt.   The terminal connection structure using a bolt according to claim 1, wherein the bolt temporary fixing member is disposed on a bolt penetration surface side of the nut.   The terminal connection structure using a bolt according to claim 2, wherein the bolt fixing member is fixed to a bolt through surface of the nut.   The terminal connection structure using a bolt according to claim 1 or 2, wherein the bolt fixing member is integrally formed with the insulating block.   The terminal connection structure using the bolt according to any one of claims 1 to 4, wherein the bolt temporary fixing member is formed of a synthetic resin material.   The terminal connection structure using a bolt according to any one of claims 1 to 5, wherein an inner diameter of the bolt insertion portion of the bolt temporary fixing member corresponds to a thread valley diameter of the bolt.   7. The terminal according to claim 1, wherein the terminal has a bolt insertion slot communicating with a wide opening, and the insulating block has a locking portion that engages with the opening. Terminal connection structure using bolts.   An electric connection box comprising a terminal connection structure using the bolt according to claim 1.

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