JP4177026B2 - Inspection jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inspection jig, and more particularly to an inspection jig suitable for inspecting an external connection portion built in a molded product having a large variation in outer frame size such as a resin injection product.
[0002]
[Prior art]
For example, a relay box as an electrical connection box used for interconnection of vehicle wire harnesses, etc. is formed of a resin injection product, and is a circuit part or a connector part that is an external connection part, a relay terminal part, a fuse terminal part, etc. A wiring board on which is mounted is stored. And the continuity test of the said external connection part is performed in the state which accommodated the wiring board in the relay box.
[0003]
As an inspection jig for conducting a continuity test of an external connection portion as an object to be inspected, for example, there is a connector terminal detection tool disclosed in Japanese Patent Laid-Open No. 7-302669. This has a connector holder that supports a female connector in which a rear holder that prevents the terminal from being pulled out is locked to a rear end, and is opposed to and disposed in the connector receiver so as to be able to come into contact with and separate from the connector. and the detector body continuity test pin is incorporated to check the conduction contact with parts, during the conductivity test, the front end portion of the connector and the contact with the connector after the the terminal conductive test pin abuts with the locking member A contact portion that presses toward the connector receiving portion is provided in the detector body, and the connector is positioned and elastically supported, so that the connector and the locking member locked to the rear end portion of the connector are not damaged. A terminal continuity test is performed.
[0004]
[Problems to be solved by the invention]
Since the above-described relay box, connectors, relays, fuses, and the like are formed of resin injection molded products, the dimensional variation of the molded products is larger than the accuracy of the inspection jig. Conventionally, there was recognition of dimensional variation for each lot of molded products, but since the inspection jig is complicated and large, an absorption mechanism for absorbing the dimensional variation due to the installation space in the inspection jig such as a normal connector Could not be established.
[0005]
For this reason, conventionally, since the dimension of the inspection jig is adjusted in accordance with the dimension of the product to be inspected at every inspection, it takes time for the dimension adjustment, and the labor cost increases accordingly. There was a problem.
Further, the connector terminal detection tool disclosed in the above publication is intended for a single connector, and even if it can absorb the dimensional variation of a small object such as a connector, the relay box It is not possible to absorb the dimensional variation of large molded products such as.
[0006]
The present invention has been made in view of the above-mentioned points, and it is possible to quickly connect a connector part, a relay terminal part, a fuse terminal part, etc., which are built-in external connection parts by absorbing the dimensional variation of the outer frame of a large molded product. An object of the present invention is to provide an inspection jig that can be inspected by the inspection.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a receiving part disposed on one side of the base and supporting the outer frame of the resin molded product, and the base can be contacted and separated from the receiving part. An inspection part provided in a housing provided in the inspection and for inspecting an external connection part incorporated in the supported outer frame, and an operation lever provided on the other side of the base for driving the housing. In the inspection jig, in the receiving part,
(A) a support member 18 in which a flange 18b is formed concentrically on the lower part of the outer peripheral surface of a cylindrical shaft portion 18a;
(B) a plug 21 disposed facing the flange 18b in the lower surface direction;
A spring 19 disposed between the flange and the plug;
(C) a guide shaft 20 that is slidably inserted into the hole of the plug through the spring;
A movable base 17 is provided,
The support member 18 is pushed up by the spring force of the spring 19, and the upper surface 18e of the flange 18b is brought into contact with the receiving portion and locked.
When a load is applied to the upper surface 18e, it is pushed down against the spring force, and the outer frame is elastically supported by the guide shaft 20 so as to be slidable up and down .
The inspection portion is provided with a knock pin having a tapered tip 15a that defines a reference position with respect to the outer frame, and an opening end inner circumferential surface 32a facing the knock pin 15 is tapered toward the opening end side of the outer frame. Fit into a positioning hole formed with a diameter expanded to
It is configured to absorb the dimensional variation of the outer frame and fix it to the reference position.
[0008]
The present invention is configured as described above, and the movable base is configured to include a support member that is provided on the upper surface of the receiving portion so as to protrude freely and supports the outer frame, and an elastic member that pushes up the support member. It is. The outer frame of the resin molded product is placed on the movable base of the receiving unit. As a result, the outer frame is elastically supported by the receiving portion so as to be slightly displaceable in the vertical direction, and the positioning hole provided inside opposes the knock pin provided in the inspection portion within the range of the dimensional variation of the outer frame. As the housing is driven by the operating lever and approaches the receiving portion, the tip of the knock pin is gradually inserted into the opening of the positioning hole, and when the knock pin is inserted into the positioning hole, the outer frame is the reference position as the inspection position. Is accurately positioned and fixed. As a result, the resin molded product absorbs variations in the dimensions of the outer frame and is stably fixed in a predetermined position (inspection position) range. When the housing is further moved to the receiving part side, the inspection part accurately contacts the external connection part built in the outer frame, and the inspection is performed. In this way, the inspection jig can inspect the external connection part built in the large molded product in a short time.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples.
FIG. 1 is a partially cutaway side view of an inspection jig according to the present invention, and FIGS. 2 and 3 are enlarged views of main parts of FIG. As shown in FIG. 1, the inspection jig 1 includes a base 2, a housing 3, an inspection part 4, a receiving part 5 for an object to be inspected, and an operation lever 6. The object to be inspected is, for example, a relay box 30 used as an electric junction box for automobiles, and a connector part, a relay terminal part, a fuse terminal part and the like are built in an outer frame 31 constituting the main body.
[0010]
The base 2 has side walls 2a and 2b vertically suspended at both ends, and guides the housing 3 parallel to the bottom surface 2c of the base 2 along the longitudinal direction (horizontally) below the side walls 2a and 2b. The guide shaft 11 is cross-linked. Both ends of the guide shaft 11 are fixed to the side walls 2a and 2b. In addition, a concave notch 2d that opens upward is provided at the upper part of the side wall 2a, and an appropriate gap exists between the outer frame 31 of the relay box 30 from above and the both sides of the notch 2d. It can be installed.
[0011]
The housing 3 includes a base portion 3a, a support column 3b suspended from the upper surface of the base portion 3a, and a locking portion 3c provided at the upper end of the support column 3b. The base 3 a is slidably mounted on the bottom surface 2 c of the base 2, and a hole 3 d is horizontally penetrated in a lower portion corresponding to the guide shaft 11. The housing 3 is configured such that the guide shaft 11 is inserted through the hole 3d of the base portion 3a so that the housing 3 can slide horizontally along the longitudinal direction. The return spring 12 is concentrically disposed between the inner surface of the opposing side wall 2a and the end surface of the base portion 3a and concentrically outside the guide shaft 11, and biases the housing 3 toward the side wall 2b. .
[0012]
The inspection unit 4 is provided on the side wall 2a side of the column 3b, and an inspection contact probe 13 is provided to protrude horizontally at a predetermined position on the end surface 4a. The contact probe 13 includes a plurality of inspection pins 14, each inspection pin 14 is supported by a spring force so as to be able to advance and retreat horizontally, and a connection terminal as an external connection portion of a connector 35 whose tip is built in the relay box 30. (Not shown) can be contacted.
[0013]
As shown in FIGS. 1 and 2, a positioning knock pin 15 protrudes horizontally at a predetermined position of the end surface 4 a of the inspection portion 4, for example, a position below the contact probe 13. The knock pin 15 has a proximal end fixed to the inspection portion 4, and a distal end 15 a having a tapered diameter so that it can be easily inserted into a positioning hole 32 provided in the outer frame 31. The knock pin 15 is set longer than each inspection pin 14 of the contact probe 13. The knock pin 15 positions the outer frame 31 at a reference position (inspection position) and fixes the built-in connector 35 so that the position of the built-in connector 35 is stably located within a predetermined position range. The locking portion 3c is provided at the upper end of the support column 3b so as to project horizontally toward the inspection portion 4 side, and the lower surface of the distal end abuts on the upper surface of the outer frame 31 placed and supported on the receiving portion 5 during the inspection. To do.
[0014]
As shown in FIG. 1 and FIG. 2, the receiving part 5 mounts and supports the outer frame 31 of the relay box 30, and is located slightly below the inner surface of the side wall 2a and the lower end 2d 'of the notch 2d. It is arranged. The receiving frame 5 has a flange 5b that is suspended from one side of the upper surface 5a, and the other side of the upper surface 5a is set at a position slightly lower than the upper end 2d ′ of the notch 2d. The lower part of the outer frame 31 placed on the upper surface 5a is sandwiched and held between the flange 2b and the upper end of the lower end 2d ′ of the notch 2d. On the upper surface 5a of the receiving portion 5, a plurality of, for example, two movable bases 17 for elastically mounting and supporting the outer frame 31 are provided in the width direction (perpendicular to the paper surface). Supports both sides.
[0015]
As shown in FIG. 3, the movable table 17 includes a support member 18 and a spring 19. A hole 5c and a hole 5d larger in diameter and deeper than the hole 5c are formed concentrically on the upper surface 5a of the receiving portion 5, the hole 5c opens on the upper surface 5a, and the hole 5d opens on the lower surface. These holes 5c and 5d are connected in series with a stepped portion 5e. A female screw 5f is engraved in the lower part of the inner peripheral surface of the hole 5d.
[0016]
The support member 18 has a substantially convex shape in a side view in which a flange 18b is formed concentrically at the lower part of the outer peripheral surface of the cylindrical shaft portion 18a, and a hole 18c as a spring seat is formed at the center position of the lower surface of the flange 18b. A hole 18d having a smaller diameter than the hole 18c is formed concentrically. The base end of the guide shaft 20 is fitted and fixed in the hole 18d. The support member 18 has a shaft portion 18a fitted into the hole 5c and a flange 18b fitted into the hole 5d so as to be slidable in the vertical direction.
[0017]
As shown in FIG. 3, the plug 21 has a cylindrical shape, and a hole 21a serving as a spring seat facing the holes 18c and 18d of the support member 18 is concentric with a hole 21b having a smaller diameter than the hole 21a. A hole 21a is opened on the upper surface, a hole 21b is opened on the lower surface, and a male screw 21c that is screwed with the female screw 5f of the hole 5d is formed in the lower part of the outer peripheral surface. The plug 21 is inserted into the hole 5d of the receiving portion 5 and is screwed between the upper surface of the plug 21 and the lower surface of the support member 18 facing the upper surface. Both ends of the spring 19 are inserted into the hole 18c of the support member 18 and the hole 21a of the plug 21 to be contracted, and the tip of the guide shaft 20 is slidably fitted into the hole 21b of the plug 21 through the spring 19. It is inserted.
[0018]
The support member 18 is pushed up by the spring force of the spring 19, and the upper surface of the flange 18 b is brought into contact with and engaged with the step portion 5 e, and the upper portion of the shaft portion 18 a protrudes from the upper surface 5 a of the receiving portion 5. The support member 18 is pushed up by the spring force of the spring 19 and is pushed down against the spring force when a load is applied to the upper surface 18e, and can be moved up and down by the guide shaft 20 without rattling in the hole 5c. Thereby, the receiving part 5 can elastically support the outer frame 31 of the relay box 30.
[0019]
The guide shaft 20 is not always necessary. Further, in a state where the upper surface 18e of the support member 18 is flush with the upper surface 5a of the receiving portion 5, a slight gap is left between the lower surface and the upper surface of the plug 21, so that the upper surfaces 5a and 18e are securely connected. It is configured to be flush with each other.
As shown in FIG. 1, the operation lever 6 is disposed on the side wall 2 b side of the base 2, and the base end is pivotally supported by the shaft 25 on the side wall 2 e of the base 2 so as to be rotatable in the directions of arrows C and CC. The pressing portion 6a can be brought into contact with the receiving plate 7 fixed to the substantially central portion of the column 3b of the housing 3. When the operating lever 6 rotates the handle portion 6b in the counterclockwise direction indicated by the arrow CC, the pressing portion 6a comes into contact with the receiving plate 7 and the housing 3 is against the spring force of the spring 12 on the receiving portion 5 side ( When it is pushed to the left (in the drawing) and rotated in the direction of arrow C, the pressing portion 6 a is separated from the receiving plate 7, and the housing 3 is moved to the side wall 2 b side by the spring force of the spring 12.
[0020]
As shown in FIGS. 1 and 2, the relay box 30 is a resin injection product, an outer frame 31 as a main body is formed of a resin member, and a connector 35, a relay (not shown), a fuse, and the like are incorporated therein. And the positioning hole 32 which fits with the knock pin 15 of the test | inspection part 4 in the predetermined position inside the outer frame 31 is provided. As shown in FIG. 2, the opening end inner peripheral surface 32 a of the positioning hole 32 facing the knock pin 15 is formed to have a taper-like diameter increasing toward the opening end side, and the tip 15 a of the knock pin 15 having a diameter reduced to the taper shape is formed. Easy to insert.
[0021]
The operation will be described below.
In FIG. 1, first, the operating lever 6 is rotated in the direction of the arrow C to move (retreat) the housing 3 toward the side wall 2 b and away from the receiving portion 5. Next, the outer frame 31 is placed with the connection terminal portion (not shown) of the connector 35 to be inspected facing the contact probe 13 of the inspection portion 4 on the movable base 17 of the receiving portion 5, that is, the support member 18. As a result, the outer frame 31 is elastically supported and can be slightly displaced in the vertical and horizontal directions. In this state, the knock pin 15 and the positioning hole 32 face each other within the range of dimensional variations of the outer frame 31.
[0022]
Next, when the operating lever 6 is rotated in the direction of the arrow CC, the pressing portion 6a pushes the housing 7 against the spring force of the spring 12, and moves (advances) leftward in the figure. Since the knock pin 15 protrudes longer than the contact probe 13 of the inspection unit 4, it reaches the vicinity of the opening end of the positioning hole 32 before the contact probe 13 contacts the connection terminal of the connector 35. As shown in FIG. 2, the tip 15a of the knock pin 15 is tapered and the opening end 32a of the positioning hole 32 expands in a taper shape, and these are opposed to each other within the range of dimensional variations of the outer frame 31. Therefore, even when the center of the knock pin 15 and the center of the positioning hole 32 are slightly displaced (center misalignment) as indicated by the alternate long and short dash lines a and b, the knock pin 15 smoothly enters the positioning hole 32. The outer frame 31 is displaced and positioned by being guided and inserted.
[0023]
When the knock pin 15 is inserted into the positioning hole 32, the outer frame 31 is positioned at the reference position as the inspection position, and the lower surface of the locking portion 3 c provided at the upper end of the housing 3 is the upper surface of the outer frame 31. Abut and lock. In this way, the outer frame 31 is accurately positioned and fixed at the reference position. Thereby, the variation in the dimension of the outer frame 31 is absorbed, and the position of the connection terminal of the connector 35 is stably fixed within the range of the reference position.
[0024]
When the operation lever 6 is further rotated in the direction of the arrow CC, the tip of each inspection pin 14 of the contact probe 13 of the inspection unit 4 comes into contact with the connection terminal of the connector 35 accurately. Then, the connector 35 is inspected. In this way, the inspection jig 1 can inspect the external connection part incorporated in a short time by absorbing the dimensional variation of the large molded product, such as the outer frame 31 of the relay box 30 that is a resin injection product. it can.
[0025]
In the above embodiment, a relay box that is a large resin injection product is used as the object to be inspected, and the case where the connection terminal of the connector part is inspected as an external connection part to be built in is described. Needless to say, the present invention can be applied to other large resin molded products, and can also be applied to inspection of external connection portions such as built-in relay terminal portions and fuse terminal portions in addition to connectors.
[0026]
【The invention's effect】
As described above, according to the present invention, the inspection jig absorbs the dimensional variation of the outer frame of a large resin molded product such as a resin injection product, and is easily and accurately positioned and fixed at a reference position as an inspection position in a short time. Thus, it is possible to greatly reduce the inspection time of the external connection part built in, and it is possible to improve work efficiency and to reduce labor costs associated therewith. Moreover, the structure of a movable stand is simple and it can mount | wear with a receiving part cheaply.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of an inspection jig according to the present invention.
2 is an enlarged view of the vicinity of a positioning pin of a knock pin and a relay box outer frame of the inspection unit shown in FIG. 1;
FIG. 3 is an enlarged view of a receiving part of the inspection jig shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inspection jig 2 Base 3 Housing 4 Inspection part 5 Reception part 6 Operation lever 13 Contact probe 15 Knock pin 17 Movable stand 18 Support member 19 Spring 21 Plug 30 Relay box (resin injection product)
31 Outer frame 32 Positioning hole 35 Connector

Claims (1)

A receiving portion that is disposed on one side of the base and supports an outer frame of the resin molded product, and a supported outer frame that is provided in a housing that is provided on the base so as to be in contact with and away from the receiving portion. In an inspection jig provided with an inspection part for inspecting an external connection part built in, and an operation lever provided on the other side of the base and driving the housing,
In the receiving part,
(A) a support member 18 in which a flange 18b is formed concentrically on the lower part of the outer peripheral surface of a cylindrical shaft portion 18a;
(B) a plug 21 disposed facing the flange 18b in the lower surface direction;
A spring 19 disposed between the flange and the plug;
(C) a guide shaft 20 that is slidably inserted into the hole of the plug through the spring;
A movable base 17 is provided,
The support member 18 is pushed up by the spring force of the spring 19, and the upper surface 18e of the flange 18b is brought into contact with the receiving portion and locked.
When a load is applied to the upper surface 18e, it is pushed down against the spring force, and the outer frame is elastically supported by the guide shaft 20 so as to be slidable up and down .
The inspection portion is provided with a knock pin having a tapered tip 15a that defines a reference position with respect to the outer frame, and an opening end inner peripheral surface 32a facing the knock pin 15 is tapered toward the opening end side of the outer frame. Fit into a positioning hole formed with a diameter expanded to
An inspection jig characterized by absorbing dimensional variations of the outer frame and fixing the outer frame to the reference position.

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