JP2555761B2 - Device for attaching equipment to support rail - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a device mounting device for fixing electric devices such as electromagnetic contactors and relays to U-channel type support rails.

[Prior Art] As a device for mounting the above-mentioned device, as shown in FIG. 8, a fixed claw 2 arranged facing each other on the bottom face of the case of the device body 1 and a slider 4 with a claw biased by a spring 3 are provided. A U-channel type support rail 5 is sandwiched between the fixed claw 2 and the slider 4 so as to fix the instrument body 1 to the support rail 5, which has been generally used conventionally.

Here, the slider 4 is guided and supported in a guide groove portion 7 molded integrally with the case 6 of the instrument body 1 so as to be slidable in the front-rear direction, and a compression coil interposed between the guide groove portion 7 and the slider 4 is provided. The device body 1 is fixed to the support rail 5 by being urged in the direction of arrow P by the spring force of the urging spring 3, which is a spring, to sandwich the support rail 5 between the fixing claw 2 and the slider 4. On the other hand, against the biasing spring 3, the slider 4
By pulling in the direction of arrow Q, the engagement between the slider 4 and the support rail 5 is released, and the instrument body 1 can be removed from the support rail 5.

Next, FIGS. 9 and 10 show a conventional structure relating to the peripheral portion of the slider of the above-described device mounting apparatus. In the figure, the case 6 of the instrument main body is a molded product of thermosetting resin having a two-part structure in which the divided cases 6a and 6b are combined, and the guide groove portion 7 of the slider 4 is shown in FIG. It is molded integrally with the case 6 together with the fixed claw 2.

On the other hand, the slider 4 is provided with a pair of guide protrusions 4a and 4b which are divided into front and rear portions and protrude laterally from the left and right side surfaces, a loading window 4c for the biasing spring 3 which is opened in the central portion, and a rear end portion. Handle part
4d is formed, and the guide protrusions 4a and 4b are guided and supported so as to be held from both sides by a guide groove portion 7 having an L-shaped cross section provided on the case side. When the slider 4 is assembled, the guide projections are provided at the middle portion of the guide groove 7 in the longitudinal direction.
A cutout groove 7a into which the 4a is inserted is formed. Further, the case 6 is provided with a spring seat 8 for the projecting urging spring 3 which projects into the window 4c on the slider side. The spring seat 8 is a small square piece made of a molded thermoplastic resin separately from the case 6, and is inserted into an embedding slot formed in the case 6 to be assembled.

In order to assemble the slider 4 into the case 6 with such a structure, first, the guide protrusion 4a is inserted into the notch groove 7a of the guide groove portion 7 and then the slider 4 is slid forward to guide the guide protrusions 4a and 4b into the guide groove portion 7. After being engaged, the biasing spring 3 is stretched and loaded between the spring loading window 4c of the slider 4 and the spring seat 8.

The structure of the device mounting apparatus having the above structure is disclosed as prior art in, for example, Japanese Utility Model Laid-Open No. 1-10954.

[Problems to be Solved by the Invention]

By the way, the above-mentioned conventional structure has the following drawbacks in terms of assembly into the device and mechanical strength, particularly regarding the spring seat provided on the case side of the instrument body.

That is, in the structure in which the spring seat 8 is formed as a separate component from the case 6 and is incorporated in the case 6, the number of parts and the number of assembly steps are increased, and the manufacturing cost is increased, and the spring seat is unexpectedly dropped from the case when handling. There is also a risk of it being unreliable.

On the other hand, it is conceivable to integrally form the spring seat 8 together with the guide groove 7 when the case 6 is molded, but as shown in the figure, the spring seat 8 is a small angled piece of protrusion-shaped spring receiver that cuts off with the guide groove 7 and stands independently. In order to mold the seat 8, it is necessary to combine side molds having different drawing directions with each other in order to release the molded product, which complicates the structure of the molding mold.
Further, as shown in the figure, in the structure in which the end face of the spring seat 8 is provided with the projection which engages with the biasing spring 3, the molding die becomes more complicated. Moreover, in the case of a thermosetting resin molded product that is brittle and easily chipped in terms of strength, when the case is handled, it may be easily damaged if it hits the spring seat standing upright from the case as a small angle piece.

The present invention has been made in view of the above points, and has a robust structure in which the spring seat is easily formed integrally with the instrument body case, and moreover, it is possible to ensure that the biasing spring is accidentally disengaged from the spring seat. An object of the present invention is to provide a device mounting device that can be prevented.

[Means for solving the problem]

In order to solve the above-mentioned problems, in the attachment device of the present invention, the spring seat provided on the case side of the instrument body is integrally formed with the case of the instrument body as a striated wall continuous with the guide groove, and the slider has the above-mentioned structure. A relief groove is formed to avoid interference with the wall of the spring seat.

Further, in the above structure, as a measure for preventing the biasing spring inserted between the spring seat on the instrument body side and the slider from falling off, a protruding spring seat on the instrument body side is provided with an eaves-like shape from its tip. Forming a stepped portion for holding the biasing spring protruding to
Or, in a part of the slider, in the assembled state in which the slider is attached to the instrument body, a spring holding cover portion for externally covering the end of the biasing spring supported by the spring seat on the instrument body side is formed. You can

[Action]

With the above configuration, the mold forming die for the instrument body case including the guide groove portion and the spring receiving portion does not require a side core in particular, and is a simple two-way die that is a combination of an upper die and a lower die. Can be dealt with. Also, since the spring seat is molded as a strip wall that is continuous with the member of the guide groove, it is more robust than the protruding spring seat in which the small angle piece stands up independently, and the case is molded of thermosetting resin. Even if it is a product, there is no risk of it being easily damaged and chipped off. Moreover,
Since a relief groove is formed on the side of the slider facing the spring seat to avoid interference with the strip wall body, there is no possibility of obstructing the sliding movement of the slider.

Further, the eave-shaped stepped portion formed at the tip of the spring seat holds the biasing spring stretched between the spring seat and the slider at the loading position to prevent the spring seat from being accidentally dropped from the spring seat. To work. Moreover, this eave-shaped stepped portion can be handled by a molding die having a simple structure as compared with the case where a spring engaging projection formed at the center of the spring receiving surface is molded. A similar fall prevention function of the biasing spring can also be obtained by a spring holding cover portion formed on a part of the slider so as to cover the end portion of the biasing spring supported by the spring seat from the outside.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In the drawings of the embodiments, the same members corresponding to FIGS. 9 and 10 are designated by the same reference numerals.

Embodiment 1 FIGS. 1 to 3 show an embodiment corresponding to claim 1 of the present invention. That is, in one split case 6a of the instrument body case 6 having a two-divided structure, the spring seat indicated by the reference numeral 9 is integrally formed as a strip wall body 9a which is continuous with the guide groove portion 7 and projects to the center of the case 6. It is molded. Here, the spring seat 9 is formed so as to be continuous with the rear position of the cutout groove 7a formed in the guide groove portion 7.

On the other hand, the slider 4 is provided with a recessed escape groove 4e on the surface facing the spring seat 9 along the stroke direction of the slider 4 for avoiding interference with the strip wall 9a of the spring seat.
The cutout length A of the cutout groove 7a in the guide groove portion 7 is larger than the length dimension a of the front guide protrusion 4a in the slider 4 (A> a), and the end of the cutout groove 7a and the guide groove portion 7a. The length B from the rear end of the slider 7 is selected to be smaller (B <b) than the length b of the rear guide protrusion 4b of the slider 4.

In order to assemble the slider 4 on the case side with such a configuration, first, the guide protrusion 4a of the slider 4 is inserted into the notch groove a of the guide groove portion 7, and then further slid forward.
As a result, the guide protrusions 4a and 4b of the slider are engaged with and supported by being wrapped around the front and rear portions of the guide groove portion 7, respectively. Next, the window 4c opened in the slider 4 at this position
An urging spring 3, which is a compression coil spring, is inserted between the tip surface of the and the spring seat 9. In the state where the slider 4 is fitted in the guide groove portion 7, as shown in FIG.
Since the strip wall body 9a enters into the escape groove 4e of the slider 4,
The slide movement of the slider 4 is not hindered by the wall 9a.

Embodiment 2: FIGS. 3 and 4 show an embodiment corresponding to claim 2 of the present invention. That is, a stepped portion 9b is formed at the tip of the protruding spring seat 9 that is integrally formed with the case 6 of the instrument main body and that projects like an eaves toward the biasing spring 3.

The stepped portion 9b serves to hold the biasing spring 3 in the loading position and prevent it from being accidentally disengaged from the spring seat 9. Moreover, this stepped portion 9b has a structure in which an engaging projection is formed at the center of the seat surface of the spring seat 9 (see FIG. 1 or 6).
Compared with the one shown in the figure), a simple molding die can be used.

Embodiment 3: FIGS. 6 and 7 show an embodiment corresponding to claim 3 of the present invention. That is, a part of the slider 4 is coded
It is provided with a cover portion for holding the biasing spring shown by 4f. In the assembled state in which the slider 4 is attached to the case 6, the cover portion 4f bypasses the outer side of the projecting spring seat 9 on the case side and removes the end of the biasing spring 3 carried by the spring seat 9. The slider 4 is formed integrally with the slider 4 so as to cover it from the outside.

With this configuration, similarly to the spring holding stepped portion of the spring seat described in the second embodiment, the biasing spring 3 supported by the spring seat 9 is securely held in the loading position, and the spring seat surface You can prevent it from coming off accidentally. Moreover, this cover portion 4f can be easily dealt with by partially changing the molding die of the slider 4.

〔The invention's effect〕

Since the device mounting apparatus according to the present invention is configured as described above, it has the following effects.

(1) Since the spring seat provided on the case of the instrument body is constituted by the strip wall body continuing to the guide groove part of the slider also provided on the case side, the split case of the instrument body including the guide groove part and the spring seat. Can be integrally molded using a simple two-way punching mold forming die including a combination of an upper mold and a lower mold. In addition, this spring seat is mechanically more robust than the spring seat that is a small-angled piece protrusion separated from the guide groove like the conventional structure, and the case of the instrument body is a molded product of thermosetting resin. Even if there is a case, even if something unexpectedly hits the spring seat when handling the case, there is no danger of it being easily damaged and falling off. Moreover, since the escape groove is formed on the slider side so as to avoid the interference of the spring seat provided on the case side with the strip wall body, the movement of the slider is not impeded by the spring seat.

(2) A structure in which a spring holding stepped portion protruding like an eave is formed at the tip of a spring seat provided on the instrument body case side, or a cover portion for holding a biasing spring is formed in a part of the slider. Thus, the biasing spring inserted between the spring seat and the slider can be reliably held at the loading position and can be prevented from being accidentally disengaged from the spring seat. Moreover, the molding die does not become particularly complicated due to the molding of the stepped portion and the cover portion, and a simple molding die can be easily used.

[Brief description of drawings]

1 to 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7 and FIG. 7 show the structure of the essential parts of different embodiments of the present invention. FIG. Fig. 2 is an exploded perspective view of Fig. 2, and Fig. 2 is a bottom view of the device showing an assembled state of the slider.
3 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is an assembled cross-sectional view with a bias spring loaded, FIG. 5 is a perspective bottom view of the case side in FIG. 4, and FIG. FIG. 7 is a perspective view of the slider in FIG. 6, FIG. 8 is a schematic view of the entire device mounting device, FIG. 9 and FIG.
FIG. 10 is a rear view and an exploded perspective view showing a conventional main structure, respectively. In the figure, 1: instrument body, 2: fixed claw, 3: bias spring, 4: slider, 4a, 4
b: guide protrusion, 4c: urging spring loading window, 4e: escape groove, 4f: spring holding cover part, 5: support rail, 6: instrument body case,
7: Guide groove, 9: Spring seat, 9a: Wall body, 9b: Spring holding step.

Claims (3)

(57) [Claims] 1. A support rail for supporting an instrument body by providing fixing claws and spring-biased sliders, which are arranged to face each other on a bottom surface of a case of the instrument body, and a U-channel type supporting rail is sandwiched between the fixing claw and the slider. Is a fixture mounting device that is fixed to the slider. The slider is provided with a pair of front and rear guide protrusions that project to the left and right sides, and a bias spring loading window that opens in the center. A guide groove having an L-shaped cross section and a projecting spring seat projecting into a spring loading window are provided, and a biasing spring is interposed between the spring seat and the slider. The support rail is characterized in that it is formed integrally with the case of the instrument main body as a striated wall body connected to the guide groove portion, and a relief groove is formed in the slider to avoid interference with the wall body of the spring seat. Tool mounting device to. 2. The device mounting apparatus according to claim 1, wherein a stepped portion for holding a biasing spring protruding from the tip of the spring seat is provided on the projecting spring seat provided on the device body side. A device for attaching a device to a support rail, which is characterized in that 3. The instrument mounting apparatus according to claim 1, wherein an end portion of a biasing spring supported by a spring seat on the instrument body side in an assembled state in which the slider is attached to a part of the slider on the instrument body. A device for attaching a device to a support rail, characterized in that a cover portion for holding a spring is formed to cover the outer side of the device.