JPH05198332A - Fitting structure of case - Google Patents

Abstract

PURPOSE:To improve the manufacturing efficiency of a rail slider, and reduce the labor necessary for the disposal processing, and improve the reliability of the rail holding condition using a rail slider. CONSTITUTION:A groove 25 and a recessed part 28 are formed in a PC main body 21, and a rail slider 30 is located inside the recessed part 28 to freely slide, and the rail slider 30 is energized to the groove 25 side by the spring force of a spring piece 37 formed integrally with the rail slider 30. A projection 40 formed in the spring piece 37 is fitted in a groove 50 inside of the recessed part 28. A rail 22 is fitted in the groove 25, and projections 43, 44 of both ends of the rail 22 in the cross direction are respectively pinched for fixation between holding pieces 26, 27 of the PC main body 21 and the bottom surface 25c of the groove 25 and between a holding piece 34 of the rail slider 30 and the bottom surface 25c of the groove 25. The holding piece 34 is moved to fit and remove the rail 22 by sliding the rail slider 30, resisting the spring force of the spring piece 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case mounting structure for temporarily mounting a case such as a programmable controller on a control panel, an operation panel or the like and then mounting it on a longitudinal body such as a rail.

[0002]

2. Description of the Related Art When a so-called programmable controller (hereinafter abbreviated as PC) is mounted on an operation panel, a control panel, etc., conventionally, the following mounting structure has been used.
Attach the PC to the rail once.

FIG. 11 is a front view showing the above-mentioned mounting structure, and FIG. 12 is a plan view seen from the upper side of the drawing. 13 is a sectional view taken along the section line AA of FIG. 11, and FIG. 14 is a sectional view taken along the section line BB of FIG. The internal structure of the PC body is omitted.

The PC body 1 is mounted on the rail 1 as an object to be mounted.
It is attached via 7. The rail 17 has a substantially U-shaped cross section perpendicular to the longitudinal direction, and both ends 18, 19 parallel to the bottom 17a of the rail 17 project outward of the rail 17 at both ends in the width direction. .. In the PC body 1,
The groove 2 is cut over the entire length of the PC body 1. One side surface 3a of both side surfaces 3a and 3b sandwiching the groove 2 of the PC body 1
Has a sandwiching piece 5 protruding toward the groove 2. One end 18 of the rail 17 is sandwiched between the sandwiching piece 5 and the bottom surface 2a of the groove 2. A recess 6 is formed in the PC body 1 on the side of the other side surface 3b so as to face the sandwiching piece 5, and a rail slider 7 which is an attachment is fitted in the recess 6. The rail slider 7 comprises a main body 20 and a coil spring 15, and the main body 20 of the rail slider 7 has a substantially plate-shaped base portion 8 and a holding piece 9 protruding toward the groove 2 as shown in the figure. , A projecting portion 10 projecting outward of the PC body 1. Guide pieces 11 and 12 are formed at both ends of the base 8,
The guide pieces 11 and 12 are engaged with guide grooves 6a and 6b provided in series with a recess 6 described later.

The base portion 8 has locking portions 8c and 8 which extend from the protruding portion 10 to the guide pieces 11 and 12 at both ends.
have d. A through hole 13 is formed in the center of the base 8,
The projection 14 connected from the recess 6 of the PC body 1 is fitted into the through hole 13. At the same time, one end 15a of the coiled spring 15 is fixed to the protrusion 14 so that the through hole 1
Located within 3.

The protrusion 10 has a through hole 16. The recess 6 has guide grooves 6a and 6b provided in a direction orthogonal to the longitudinal direction of the groove 2, and a locking portion which is inclined in the peripheral portion so that the mutual width becomes narrower toward the surface 1b side. Part 6c,
With 6d.

Since the guide pieces 11 and 12 of the rail slider 7 engage with the guide grooves 6a and 6b, respectively, the rail slider 7 can move along the guide grooves 6a and 6b. Further, the locking portions 8c and 8d of the base portion 8 are formed in the recess 6
The rail slider 7 is locked by coming into contact with the locking portions 6c and 6d at the periphery of the rail slider 7, and is prevented from falling out of the PC body 1 during the movement.

One protrusion 19 of the rail 17 is pressed and clamped between the clamping piece 9 and the bottom surface 2a of the groove 2, and the other protrusion 18 is pressed between the clamping piece 5 and the bottom surface 2a of the groove 2. Are pinched. When removing the rail 17 from the PC main body 1, first, the rail slider 7 is slid to the outside of the PC main body 1 (upward in FIGS. 13 and 14), and the holding piece 9 is inserted.
The rail 17 is removed after the projection 19 is released from the pressed state by moving the rail. Rail 17 to PC
Similarly, when mounting on the main body 1, once the rail slider 7
After moving the rail, the rail 17 is fitted into the groove 2 and the rail slider 7 is returned to its original position by the spring restoring force to return to the rail 1.
7 is attached.

[0009]

In the case mounting structure thus configured, the rail slider body 20 and the coil spring 15 are manufactured separately when manufacturing the rail slider 7 which is the mounting tool. Since the number of parts is large, there is a problem that production efficiency is low and cost is high.

Further, since the rail slider 7 easily moves by receiving some force due to the expansion and contraction of the coiled spring 15, the rail slider 7 moves undesirably, and the sandwiching piece 9 of the rail slider 7 moves on one surface 1b of the PC body 1. When the rail slider 7 is moved in the direction, the pinched state is released, and the rail slider 7 may come off the PC body 1.

Furthermore, since the rail slider 7 includes the main body 20 made of resin or the like and the coil-shaped spring 15 made of elastic metal or the like as described above, the rail slider 7 is melted after being discarded. In the case of reuse by the above method, the main body 20 and the coil-shaped spring 15 must first be separated, which requires a great deal of labor.

An object of the present invention is to reduce the number of parts of the fixture to improve the efficiency in the manufacturing process thereof, facilitate the reuse after disposal, and at the same time improve the reliability of stability in the attached state. The purpose of the present invention is to provide a mounting structure for a case.

[0013]

DISCLOSURE OF THE INVENTION The present invention provides a case mounting structure for mounting a case to a longitudinal body using a mounting tool, wherein the case is provided with a fitting recess into which the longitudinal body is fitted and a fitting recess. An inclined surface inclined toward the surface of the continuous case and an engagement recess formed near the end of the inclined surface on the side of the fitting recess are formed, and the fitting is fitted into the fitting recess. A holding piece that holds the elongated body between the bottom of the fitting recess, a protruding portion that projects outside the case, a base portion that connects the holding piece and the protruding portion, and a fitting recess from the base portion. Inclining to the case side as it goes toward the location side, a spring piece having an engaging projection that engages with the engaging recess is integrally formed, and the attachment is
A case mounting structure is characterized in that the case is elastically biased toward the longitudinal body by a pressing force from an inclined surface based on the spring force of a spring piece.

[0014]

According to the present invention, when the case is attached to the elongated body, the attaching tool is first moved to the outside of the case by applying a force to the protrusion which is a part of the attaching tool. The fixture moves along the inclined surface formed on the case while compressing the spring of the spring piece that is a part of the fixture, and the sandwiching piece that is a part of the fixture moves out of the fitting recess of the case. Transfer. The elongated body is fitted into the fitting recess with the obstruction of the sandwiching piece removed from the fitting recess. When the projecting portion is released from the state in which the force is applied, the fitting is returned to the original position by the spring restoring force of the spring piece which is a part of the fitting, and the holding piece is also returned to the inside of the fitting recess and the elongated body is returned. With the bottom of the fitting recess. In this state, the engaging protrusion, which is a part of the spring piece, engages with the engaging recess in the inclined surface to stably maintain the sandwiched state.

On the other hand, when removing the longitudinal body from the case, first, a force is applied to the projecting portion of the fitting to move the fitting to the outside of the case, and the sandwiching piece is moved outside the fitting recess. .. Therefore, the long body that is sandwiched between the bottom of the fitting recess and the sandwiching piece is released from the sandwiched state, and thus the long body can be removed from the fitting recess. When the protrusion is released from the applied force, the fixture returns to the original position by the spring restoring force of the spring piece which is a part of the fixture.

[0016]

1 is a perspective view showing a mounting structure according to an embodiment of the present invention, showing a state in which a rail is not mounted.
FIG. 2 is a bottom view of the rail with the rail attached. The detailed structure of the PC is omitted. The PC main body 21 is first attached to a rail 22 generally called a DIN (German national standard) rail, and mounted on a control panel, an operation panel or the like for use. The PC main body 21 attached to the rail 22 is positioned by the end plates 23 and 24.

A groove 25 is provided near the center of the PC body 21 on the side where it is mounted on the rail 22. One side surface 25a of the facing side surfaces 25a and 25b of the groove 25 is
The groove 25 has a pair of holding pieces 26, 27 near both ends in the longitudinal direction. A gap d1 exists between the sandwiching pieces 26 and 27 and the bottom surface 25c of the groove 25. The other side surface 2 of the PC body 1
A recess 28, which will be described later, is formed from the 5b side toward the one surface 21a side of the PC main body 1, and a rail slider 30 as an attachment is engaged with the recess 28.

FIG. 3 is a perspective view of the rail slider 30. The rail slider 30 is made of a resin having elasticity such as polycarbonate or polyacetal. The rail slider 30 includes a base portion 32 having a through hole 31 in the center and a protrusion portion 33 protruding to the outside of the PC body 21.
And a sandwiching piece 34 protruding from the base 32 to the opposite side of the protruding portion 33, and a pair of guide pieces 3 provided at both ends of the base 32.
5, 36 and the spring piece 37 located in the through hole are integrally formed of the same material. The base portion 32 has a pentagonal plate shape in plan view, and the engaging portions 41 and 42 near two sides of the peripheral edge which do not have parallel sides facing each other are recessed portions of the rail slider 30 as described later. Prevent falling from 28. The protruding portion 33 has a through hole 38 whose center portion is formed slightly wider toward the outer side of the rail slider 30.
Have. The spring piece 37 is formed in an elongated plate shape, and both ends thereof are continuous with the inner peripheral edge of the through hole 31. Spring piece 3
7 is inclined toward the inside of the PC main body 1 from the surface 21a side toward the groove 25 side, and a protruding ridge 40 is formed near the inside end of the groove 25 toward the inside of the PC main body 1.

FIG. 4 is a front view of the mounting structure of this embodiment, and FIG. 5 is a plan view from the surface 21a side, and FIG.
4 is a sectional view taken along section line C-C in FIG. 4, FIG. 7 is a sectional view taken along section line D-D in FIG. 4, and FIG. 8 is a perspective view of PC main body 21.

The rail 22 is made of metal or the like, and a main body 45 of the rail 22 has a generally U-shaped cross section. The protrusions 43 and 44 at both ends in the width direction are formed so as to protrude from the main body 45 of the rail 22 substantially parallel to the bottom portion 22a thereof. The width d3 of the rail 22 is formed to be slightly smaller than the width d4 of the groove 25 so that the rail 22 fits in the groove 25. The thickness of one of the protrusions 43 is slightly smaller than the distance d1.
6, 27 and the bottom surface 25c of the groove 25.

The rail slider 30 is fitted in the recess 28 provided in the PC body 21. Guide grooves 46 and 47 are formed in the recess 28 in a direction orthogonal to the groove 25, and guide pieces 35 and 36 of the rail slider 30 are engaged with each other so that the rail slider 30 follows the guide grooves 46 and 47. Supported slidably. Further, in the recess 28, the groove 2
A taper 48 is formed in the direction orthogonal to 5. Taper 4
8 near the end on the groove 25 side in the width direction of the taper 48.
0 is formed. With the rail slider 30 fitted in the recess 28, the spring piece 37 of the rail slider 30 is
Engages along the inclined surface of the taper 48, and the ridge 40 of the spring piece 37 fits into the groove 50.

The rail slider 30 is elastically biased toward the rail 22 by the pressing force from the taper 48 based on the spring force of the spring piece 37 which is a part thereof. When a force is applied to move the rail slider 30 to the outside of the PC main body 21 (upward in FIG. 7), the spring piece 37 of the rail slider 30 bends as shown by the two-dot chain line in FIG. 40 is released from engagement with groove 50. Therefore, the rail slider 30 moves according to the force. In this way, the moving rail slider 30 can be moved to a state in which the locking portions 41, 42, which are a part thereof, come into contact with the locking portions 52, 53 of the recess 28. When the rail slider 30 is released from the applied force, the spring piece 3 is released.
7 returns to the original shape from the bent state by the spring restoring force, and returns the rail slider 30 to the original position.

When no force is applied to the rail slider 30, the holding portion 34 of the rail slider 30 has the groove 25.
Projecting to the side, the distance between the sandwiching portion 34 and the bottom surface 25c of the groove 25 is d2, and the protrusion 44 of the rail 22 is provided.
Is formed so as to be slightly larger than the thickness of, and the projection 44 is sandwiched.

Therefore, the rail 22 holds the projection 43, which is one end thereof, between the clamping pieces 26 and 27 and the bottom surface 25c of the groove 25.
It is fixed to the PC main body 21 by being sandwiched between and and the protrusion 44 which is the other end portion is sandwiched between the sandwiching piece 34 of the rail slider 30 and the bottom surface 25c. Further, in this state, the rail slider 30 is fixed to the PC main body 21 by the spring force of the spring piece 37, but the projection 40 of the spring piece and the groove 50 in the taper 48 are engaged with each other to move the rail slider 30. Since it is firmly fixed to the PC body 21, the rail slider 30 does not move undesirably.

FIG. 9 is a side view showing the attaching operation of the PC main body 21 to the rail 22, and FIG. 10 is a side view showing the detaching operation of the PC main body 21 from the rail 22.

The rail 22 is a mounting object 4 such as a control panel.
It is attached to 9. When the PC main body 21 is attached to the rail 22, the rail slider 30 is resisted against the spring force of the spring piece 37 by pulling the protrusion 33 of the rail slider 30 or pressing the sandwiching piece 34. The holding piece 34 is moved to the outside of the PC body 21.
Is moved from the groove 25 into the recess 28.

Next, one of the protrusions 43 of the rail 22 is connected to the PC.
Engage with the sandwiching pieces 26, 27 of the main body 21, and in that state P
Move the C body 21 in the direction of the arrow X1 to move the other protrusion 44
Also fits in the groove 25. When the force applied to the rail slider 30 is released by any of the above-mentioned methods, the rail slider 30 returns to its original position by the spring restoring force of the spring piece 37, and the sandwiching piece 34 projects into the groove 25 so that the rail 22 moves. The protrusion 44 is engaged and the protrusion 44 is sandwiched between the bottom surface 25 c of the groove 25. Therefore, the rail 22 is fixed to the PC main body 21 with both ends 43 and 44 thereof being sandwiched.

When the PC main body 21 is detached from the attached rail 22, for example, the tip portion 51a of the screw driver 51 is engaged with the through hole 38 provided in the protruding portion 33 of the rail slider 30 to apply a force to the rail. Slider 3
0 is moved in the direction of arrow X2 against the spring force. Then, the sandwiching piece 34 is pulled from the inside of the groove 25 into the recess 28, and the sandwiching piece 34 and the groove 25 of the one protrusion 44 of the rail 22.
The pinched state between the bottom surface 25c and the bottom surface 25c is released. In that state, the other protrusion 43 of the rail 22 is clamped by the clamping pieces 26, 27.
And the bottom 25c of the groove 25 so that the PC
The main body 21 is pushed up in the direction of the arrow X3, and the PC main body 21 is removed from the rail 22.

In the mounting structure thus configured,
Unlike the conventional rail slider 30 which is formed by combining a rail slider body and a spring portion such as a metal, the whole portion including the spring portion is integrally formed by using resin or the like. The number of parts is small, and the efficiency can be improved in the manufacturing process. In addition, cost reduction can be realized in terms of both labor required for manufacturing and materials.

Further, even when the rail slider 30 is disposed of after use, since it is entirely formed of one material such as a resin, it is not necessary to separate the portions separately for the treatment, and the whole is melted as it is. Since it can be reused by carrying out the treatment described above, it is preferable because it does not require separation work, saves labor, and does not include parts such as metals that are difficult to reuse from the viewpoint of environmental hygiene.

In the conventional rail slider, the rail slider is held and held in the direction of the groove 25 only by the spring force of the spring, which is a part of the rail slider. Since the ridge 40 provided on a certain spring piece 37 engages with the groove 50 formed in the PC main body 21 to lock the rail slider 30, the rail slider 30 does not move undesirably and the rail slider 30 does not move undesirably. The reliability of holding 22 is improved.

[0032]

As described above, according to the present invention, unlike the conventional fixture, since the base portion, the sandwiching piece, the protrusion and the spring piece are integrally formed, the number of parts is small and the manufacturing process It is possible to reduce labor and improve manufacturing efficiency.

Further, the spring piece of the fixture has an engaging protrusion, and the engaging protrusion engages with an engaging recess formed in the case, so that the longitudinal body is connected to the case and the sandwiching piece. Since the state of being sandwiched between them can be maintained, the reliability with respect to the attached state can be improved as compared with the fixture which conventionally holds the state only by the spring force of the spring portion.

Further, since the fixture is integrally formed, it is convenient since it is not necessary to separate the treatment methods according to their disposal methods when they are provided for disposal / reuse.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting structure according to an embodiment of the present invention.

FIG. 2 is a bottom view showing the structure.

FIG. 3 is a perspective view of a rail slider 30.

FIG. 4 is a front view showing the mounting structure of the embodiment.

FIG. 5 is a plan view showing a mounting structure of the embodiment.

6 is a cross-sectional view taken along the section line CC of FIG.

7 is a cross-sectional view taken along the section line DD of FIG.

FIG. 8 is a perspective view of a PC main body 21.

FIG. 9 is a side view showing an attaching operation of the PC main body 21 to the rail 22.

FIG. 10 is a side view showing an operation of removing the PC main body 21 from the rail 22.

FIG. 11 is a front view showing a typical prior art.

FIG. 12 is a plan view showing the conventional technique.

13 is a cross-sectional view taken along the section line AA of FIG.

FIG. 14 is a cross-sectional view taken along section line BB of FIG.

[Explanation of symbols]

 21 PC Main Body 22 Rail 25 Groove 25, 26 Clamping Piece 28 Recess 30 Rail Slider 32 Base 33 Protrusion 34 Clamping Piece 37 Spring Piece 40 Projection 48 Taper 50 Groove

Claims (1)

[Claims] 1. A case mounting structure in which a case is attached to a longitudinal body using a fixture, wherein the case has a fitting recess into which the longitudinal body fits, and a slope extending toward the surface of the case that is continuous with the fitting recess. And an engaging recess formed in the vicinity of the fitting recess side end of the inclined surface are formed, and the fitting is configured to fit the longitudinal body fitted in the fitting recess into the fitting recess. A sandwiching piece sandwiched between the bottom portion of the place, a projecting portion projecting outward of the case, a base portion connecting the sandwiching piece and the projecting portion, and the case from the base portion toward the fitting recess side. And a spring piece having an engaging protrusion that engages with the engaging recess is integrally formed, and the attachment is attached to the longitudinal body side by the pressing force from the inclined surface based on the spring force of the spring piece. A case mounting structure that is elastically biased.