JP4208117B2 - Glow plug connecting plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a glow plug connecting plate comprising a strip for connecting a plurality of glow plugs and an insulator covering one side of the strip except for the vicinity of a hole for mounting the glow plug. .
[0002]
[Prior art]
FIG. 12 shows a state in which the glow plug G is attached to the cylinder head H of the diesel engine. The glow plug G attached to each cylinder has a strip-like connecting plate 1 at each end. Are screwed together and connected in parallel to be energized.
[0003]
FIG. 11 shows a connecting plate 1 according to the technique disclosed by the present applicant in Japanese Patent Application Laid-Open No. 10-266937, in which a steel plate or an aluminum plate having an insertion hole 3 to be inserted into the glow plug G is mounted as a mold. In the band-like body 2 made by punching out, an insulating body 4 made of resin such as nylon is integrally molded and insulated at a portion connecting the glow plugs.
[0004]
Protrusions are provided on both side edge portions of the insulator 4 to prevent deviation from the belt-like body 2, and engagement protrusions 5 are provided at both ends of the insulator 4 to be inserted into the engagement holes 2 a formed in the belt-like body 2. This facilitates the attachment work of the insulator 4.
[0005]
The connecting plate 1 is provided with a curved portion 1a in order to avoid interference with other components, but this technique is effective even in a straight belt shape without the curved portion 1A.
[0006]
Through the subsequent research, the present applicant conducted a technique for making the mold for engaging the insulator with the strip 2 simple, and engaged with the engagement protrusion 5 and the engagement hole 2a that require processing accuracy. The structure of the connecting plate 1 for glow plugs has been developed that can be used for strips that are uneven in the height direction.
[0007]
[Problems to be solved by the invention]
The present invention has been proposed in view of various problems of the prior art described above, and a pre-formed insulator can be easily and surely attached to a belt-like body, and an uneven bent portion is provided in the height direction. The purpose is to provide a connecting plate for glow plugs that can also be used for strips.
[0008]
[Means for Solving the Problems]
The connecting plate for a glow plug according to the present invention includes a band-like body 12 for connecting a plurality of glow plugs G, and an insulator 14 that covers one side of the band-like body 12 except for the vicinity of the hole 13 for mounting the glow plug. In a glow plug connecting plate 11 constituted by: a narrow portion 12a formed narrow at an appropriate position of the strip 12 and the insulator 14 holding the narrow portion 12a from both sides. A first holding part 20 formed as described above and a second holding part 30 formed so as to hold the belt-like body 12 at an appropriate position other than the narrow part of the belt-like body 12. (Claim 1).
[0009]
In the above implementation, the narrow portion formed in the band-like body between the glow plugs and the corresponding first holding portion of the insulator may be one, and the area other than the narrow portion of the band-like body is held. There may be only two second holding parts. With this simple configuration, the band-shaped body and the insulator can be easily engaged with each other, and no deviation or peeling occurs.
[0010]
It is preferable that a hole for preventing a mold undercut is provided in an upper portion of the first and second holding portions of the insulator (claim 2).
[0011]
The holes for avoiding undercuts are preferably square holes, thereby avoiding mold undercuts that occur in the insulator.
[0012]
It is preferable that a notch that can be bent in a direction perpendicular to the belt surface is formed at an appropriate position of the insulator.
[0013]
The appropriate position refers to the bending position of the bent strip, and the mass-produced product may be provided with a notch in advance, and the non-mass-produced product may be post-processed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8 with reference to the accompanying drawings. In addition, the code | symbol and name used in FIG. 11, 12 of prior art description are used overlapping the same code | symbol and name about the same form.
[0015]
FIG. 1 is a plan view of a main configuration of a glow plug connecting plate 11 according to the present invention, and FIG. 2 is a side view thereof.
1 and 2, the connecting plate 11 is composed of a strip-like strip 12 and a plurality (three in the figure) of insulators 14.
[0016]
Referring also to FIG. 3 showing the single body, the band-like body 12 is provided with four glow plug insertion holes 13 into which four glow plugs are inserted and mounted in this example. A narrow portion 12a of 6 mm is formed with respect to 10 mm. The length of the narrow portion 12a is formed to be longer than the length in the longitudinal direction of the wall portion 22 of the first holding portion 20 to be described later, and can be fitted even if the relative position with the wall portion 22 is shifted. .
[0017]
A plurality (three in the illustrated example) of insulators 14 are attached to the narrow portion 12a in a manner described later on one surface of each region between the insertion holes 3 and 3.
[0018]
FIG. 4 shows a perspective view of a part of the insulator 14 at the left end in FIGS. 1 and 2, which is formed in a flat band shape having flange portions 15 on both side edges in the width direction of the rib portion 14b. A first holding portion 20 is formed at a position corresponding to the narrow portion 12a at the left end, and a second holding portion 30 is formed at an appropriate distance.
[0019]
The first holding portion 20 is also provided with a pair of wall portions 22 having jaw portions 23 at the lower end inside the flange portion 15 with reference to FIG. The distance between the jaw part 23 and the lower surface of the rib part 14b is such a length that the thickness of the belt-like body 12 can enter, and the distance between the wall parts 22 and 22 is such a length that the narrow part 12a can be accommodated.
[0020]
A square hole 21 having a function of preventing mold undercut is provided in the upper rib portion 14b of the first holding portion 20.
FIG. 6 shows a state in which the narrow portion 12 a of the strip 12 is held in the first holding portion 20.
[0021]
Referring to FIG. 7 showing a YY cross section, the second holding portion 30 is provided with a pair of wall portions 32 extending from the lower portion of the flange portion 15 and having a jaw portion 33 at the lower end portion. Yes. The distance between the jaw portion 33 and the lower surface of the rib portion 14b is such a length that the thickness of the belt-like body 12 enters, and the distance between the wall portions 32 and 32 is such that the entire width of the belt-like body 12 can be accommodated. .
[0022]
Square holes 31, 31 having a function of preventing mold undercut are provided in the rib portion 14 b of the second holding portion 30.
FIG. 8 shows a state in which the belt-like body 12 is held in the second holding unit 30.
[0023]
The V-shaped notch 15a formed between the first holding unit 20 to the second holding unit 30 to the second holding unit 30 in FIG. 2 and FIG. In order to follow the shape, this is particularly for bending at a bent place as in the second embodiment described later.
[0024]
In the band-shaped body 12, the manufacturing method is such that a plurality of insertion holes 13 for mounting the glow plug G and the narrow portion 12 a are punched and formed (punching process), and the insulator 14 fitted to the band-shaped body 12 is the first. The first holding portion 20 and the second holding portions 30 and 30 are injection-molded (insulator injection process), and the plurality of formed insulators 14 are narrowed by the first holding portion 20 and the narrow portion 12a. Is held, and the second holding unit 30 is held at an appropriate position for assembly (assembly process).
[0025]
With such a configuration of the connecting plate 11, the insulator 14 can be easily and reliably fixed between the glow plug insertion holes 13, 13 of the strip 12 to perform an insulating function.
[0026]
9 and 10 show a second embodiment of a glow plug connecting plate. The connecting plate 11A includes a strip plate 12A having a bent portion in the vertical direction and a plurality of insulators 14A.
9 and 10, each of the strips 12A provided with the convex portions 12B having the bent portions 12e and 12f, the convex portions 12C having the bent portions 12g and 12h, and the convex portions 12D having the bent portions 12i and 12j, is insulated. This is a form in which the body 14A is fitted.
[0027]
The procedure for punching and forming the glow plug insertion hole 13 and the narrow portion 12a provided in the belt-like body 12A is the same as that in the first embodiment.
[0028]
The insulator 14A is substantially the same as the insulator 14 of the first embodiment, and is bent freely at the bent portions 12e, 12f,. Imitating the bending of
[0029]
With such a structure of the connecting plate 11A, the insulator 14A can be easily and surely fixed between the glow plug insertion holes 13 and 13 of the belt-like plate 12A having a bent portion in the vertical direction to perform an insulating function. it can.
[0030]
【The invention's effect】
The effects of the present invention are listed below.
(A) The narrow part of the belt-like body is held from both sides by the first holding part of the insulator, and appropriate plural positions other than the narrow part are held by the second holding part. Therefore, the engagement between the belt-like body and the insulator is simple, and a reliable configuration with no slippage or peeling is obtained.
(B) Since the belt-like body does not have a conventional engagement hole, the manufacturing is easy.
(C) Since a hole is provided in the upper part of the first holding part and the second holding part, the mold undercut can be avoided.
(D) By using the notch provided in the insulator, it can be used for both a flat strip and a strip bent in the vertical direction.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a glow plug connecting plate according to the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a plan view of a belt-like body used in FIG. 1;
4 is a perspective view of an insulator used in FIG. 1. FIG.
5 is a cross-sectional view taken along the line XX in FIGS. 1 and 4. FIG.
6 is a view showing a state in which a narrow portion of a belt-like body is attached to the XX cross section of FIGS. 1 and 4. FIG.
7 is a cross-sectional view taken along line YY in FIGS. 1 and 4. FIG.
8 is a view showing a state in which a belt-like body is attached to the YY cross section of FIGS. 1 and 4. FIG.
FIG. 9 is a plan view showing a second embodiment of a glow plug connecting plate of the present invention.
10 is a side view of FIG. 9. FIG.
FIG. 11 is a plan view showing a conventional glow plug connecting plate.
FIG. 12 is a cross-sectional view showing a mounted state of the glow plug.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Connecting plate 12 ... Strip | belt-shaped body 13 ... Glow plug insertion hole 14 ... Insulator 15 ... Flange part 15a ... Notch 20 ... 1st holding part 30- ..Second holding part

Claims (3)

A glow plug connecting plate comprising: a strip for connecting a plurality of glow plugs; and an insulator placed on one side of the strip except for the vicinity of a hole for mounting the glow plug. Other than the narrow part of the band-like body, the narrow part formed narrowly at an appropriate position, the first holding part formed to hold the narrow part from both sides of the insulator, A glow plug connecting plate comprising: a second holding portion formed to hold the belt-like body at an appropriate position. The glow plug connecting plate according to claim 1, wherein a hole for preventing a mold undercut is provided in an upper portion of the first and second holding portions of the insulator. The glow plug connecting plate according to claim 1, wherein a notch that can be bent in a direction perpendicular to the band surface is formed at an appropriate position of the insulator.

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