JP2002254262A - Device and method for building in torsion coil spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for building in a torsion coil spring, which enable a low price and miniaturization, and allow the coil spring to be easily built into a body in which the coil spring is built, by only simple operations. SOLUTION: This device is provided with holding means 2, 9 and 11 for holding the bodies 70 and 71 to which the torsion coil springs 73 are built, a torsion-coil-spring holding means 33 for holding the spring 73, and an arm-part expanding means 25 which is formed of two inclined parts 30a and 30b capable of coming into elastic contact with respective arm parts 73b and 73c. The inclined parts 30a and 30b are located in prescribed positions near engaging parts 71ab and 72a formed in the bodies 70 and 71, and opened toward sides of the engaging parts 71ab and 72a in such a manner as to spread out like an unfolded fan. The holding means 33 are engaged with the engaging parts 71ab and 72a in such a manner that the arm parts 73b and 73c are expanded by making the axial direction of a supporting shaft 70aa come closer to the supporting shaft 70aa and the engaging parts 71ab and 72a while the respective arm parts 73b and 73c are brought into elastic contact with the inclined parts 30a and 30b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torsion coil spring (lid lock spring) for applying a biasing force to a lid lock member for locking a lid of a tape cassette in a closed position in a direction to lock the lid. The present invention relates to a device and a method for assembling a torsion coil spring.

[0002]

2. Description of the Related Art A tape cassette is provided with a lid for exposing or covering a magnetic tape wound around a tape drawer by being rotated, and a lid which is rotatably mounted on the tape cassette. Some include a slider that can be slidably assembled.

FIG. 21 shows a lid 70, a slider 71,
2 and a plan view of the upper shell 80. In FIG. 21, the lid 70 and the slider 71 are assembled with each other, and the upper shell 80 includes the lid 70 and the slider 7.
1 shows a state before being assembled with 1. FIG. 19 is an enlarged view of an essential part of the inner surface of the lid 70 and the slider 71 on the side of the one side plate (the inner surface of the left side plate in FIG. 21).
Shows an enlarged perspective view of that part.

[0004] Support shafts 70aa and 70ba are formed to protrude from the inner surfaces of both side plate portions 70a and 70b of the lid 70, respectively. Both side plate portions 71a, 71 of the slider 71
b each has a shaft support portion 71a cut out in a substantially semicircular shape.
a (the shaft support portion 71aa is shown only on the inner surface on one side plate portion 71a side in FIG. 19, but the other side plate portion 71aa is formed).
A similar shaft support portion 71aa is also formed on the b side),
A support shaft 70aa of the lid 70 is attached to the shaft support portion 71aa.
70ba are engaged. As a result, the lid 70 is rotatable with respect to the slider 71 around the support shafts 70aa and 70ba.

As shown in FIG. 17A and FIG.
A lid lock member mounting shaft portion 70ab is formed to protrude from the inner surface of the first side plate portion 70a, and a lid lock member 72 is rotatably mounted on the shaft portion 70ab.

A lid lock spring 7 which is a torsion coil spring is mounted on the support shaft 70aa on the side of the side plate portion 70a.
The third coil part 73a is fitted outside. Coil part 73a
Of the two arm portions 73b and 73c extending from the side plate portion 7b of the slider 71
The inner surface 1a is engaged with an engagement portion 71ab formed in a U-shape that is folded inward and opened downward on the inner surface of 1a. An end of the other arm 73c is engaged with an engaging portion 72a formed on the lid lock member 72. Both arm portions 73b,
73c is in a state of being spread in a direction away from the natural state, so that the two arms 73b, 73c are engaged with each other by an elastic restoring force acting in a direction in which both arms 73b, 73c approach each other. It is in elastic contact with the parts 71ab and 72a.

As a result, the lid lock member 72 applies a counterclockwise turning force about the shaft 70ab from the lid lock spring 73 through the engaging portion 72a with which the arm portion 73c of the lid lock spring 73 elastically contacts. 19A and 20B, and is urged to the lid lock position shown in FIGS. In this state, the support shaft 70a is attached to the lid 70.
Even when a clockwise turning force around a acts, the hook portion 72b of the lid lock member 72 is caught by the engaging portion 71ab of the slider 71 and prevents the lid 70 from rotating to the open position. The lid lock spring 73 also applies a counterclockwise turning force about the support shaft 70aa to the lid 70 via the lid lock member mounting shaft portion 70ab and the lid lock member 72 fitted therein. The lid 70 is urged to the closed position (the position where the tape drawer unit covers the magnetic tape).

[0008] Such a lid 70 and a slider 71
Is assembled to the upper shell 80 of the tape cassette shown in the lower part of FIG. The upper shell 80 has guide projections 80a to 80d formed at four places. The guide projection 80a is provided on the engagement portion 71ab formed on the slider 71, and the guide projection 80b is provided on the slider 7
A guide projection 80c is formed by folding the upper end of the side plate portion 71a of the slider 71 inward and opening downward at the insertion portion 71ba formed in a U-shape that is folded inward and opened downward on the inner surface of the first side plate portion 71b. The guide projection 80d is provided on the side plate 7 of the slider 71 in the insertion portion 71c formed in a U-shape.
1b is inserted into an insertion portion 71d formed in a U-shape that is opened downward by folding the upper end inward and assembled as shown in FIG. Then, the tape cassette is combined with a tape reel, a lower shell, and other parts (all of which are not shown) around which the magnetic tape is wound.

Next, the turning operation of the lid 70 will be described. When the tape cassette is loaded in the recording / reproducing apparatus in the state shown in FIGS. 19A and 20, the unlocking member provided on the recording / reproducing apparatus side moves the one end 72 c of the lid lock member 72 around the shaft 70 ab. And the hook portion 72b and the engaging portion 71 of the slider 71 are rotated clockwise.
ab is released from engagement with the support shaft 7 by a lid opener provided on the recording / reproducing apparatus side.
0aa and the support shaft 70 formed on the other side plate portion 70b
It is turned around the ba (see FIG. 21) toward the clockwise open position side in FIG. 19 (the state of FIG. 19B). As a result, the lid 70 is in an open position where the magnetic tape of the tape drawer is exposed, and the magnetic tape is pulled out and wound around a rotating drum provided on the recording / reproducing apparatus side to reproduce a signal recorded on the magnetic tape. The signal is recorded on the magnetic tape.

The lid lock spring 73, which is a torsion coil spring having the coil portion 73a and the two arm portions 73b and 73c, is connected to the arm portion 73b,
In order to incorporate the 73c from the natural state into the lid 70 and the slider 71 as a body to be incorporated in a state where the 73c is expanded from the natural state, conventionally,
This was done using a robot as described below.

First, as shown in FIG. 23A, three chuck pins 85, 86, 87 of the robot are lowered toward the lid lock spring 73, and the pin 85 is
a, and the pins 86 and 87 are
b, 73c, respectively, and each arm part 73b,
73c. Next, as shown in FIG. 23B, the pins 86 and 87 spread, and the arms 73b and 73c are spread from the natural state shown in FIG.
The lid lock spring 73 is held by the elastic restoring force of the arm portions 73b and 73c applied to the arm.

Then, with the lid lock spring 73 held, the three pins 85, 86, 87 are raised and further turned to set the lid lock spring 73 in a predetermined direction, as shown in FIG. Engaging part 7
1 ab and the lid lock member 72, and one arm 73b is engaged with the engagement portion 71ab, and the other arm 73c is engaged with the engagement portion 72 formed on the lid lock member 72.
a (shown in an enlarged manner in FIG. 25).
As shown in FIG. 24B, the three pins 85, 86, 87 are raised to complete the incorporation.

[0013]

As described above, in the conventional assembling, the chuck pins 85 to 87 make complicated movements while finely adjusting the position, and it takes time. In addition, the robot is expensive and takes up installation space. Further, as the size of the torsion coil spring decreases, it becomes more difficult to hold the torsion coil spring with the chuck pins 85 to 87. In addition, there is a built-in device in which a rotating cam is disposed between both arm portions, and the rotation of the rotating cam causes the both arm portions to be widened. However, the entire equipment becomes large. Only the arm portion of one torsion coil spring could be expanded, and the efficiency was poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides an apparatus and a method for assembling a torsion coil spring which can be reduced in size at a low cost, and which can easily incorporate the torsion coil spring into a body to be assembled with only a simple operation. The task is to

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a device for assembling a torsion coil spring according to the present invention holds a to-be-embedded body holding means for holding an to-be-embedded body and a torsion coil spring. A torsion coil spring holding means; and an arm expanding means having two inclined portions capable of elastic contact with each of the two arm portions of the torsion coil spring. It is possible to move relative to the formed support shaft and the engaging portion, the two inclined portions are positioned at a predetermined position near the engaging portion, and open divergently toward the engaging portion side. The torsion coil spring holding means is moved relative to the torsion coil spring by holding the arm portions of the torsion coil springs elastically in contact with the inclined portion so that the axial direction of the support shaft approaches the support shaft and the engagement portion. Widen the arm by going Incorporated by fitting the coil portion to the support shaft is engaged with the engaging portion Te.

In the method for assembling a torsion coil spring according to the present invention, each of the two arm portions of the torsion coil spring is positioned at a predetermined position near an engagement portion formed on the body to be assembled. The torsion coil spring is elastically contacted with the support shaft and the engagement portion formed on the body to be assembled while being elastically contacted with the two inclined portions formed so as to diverge toward the side. Is moved to approach the support shaft and the engaging portion, whereby the arm portion is expanded and engaged with the engaging portion, and the coil portion is fitted into the supporting shaft and incorporated.

With the above configuration, the torsion coil spring can be mounted on the body to be mounted only by simple movement using an inexpensive device. That is, in the torsion coil spring assembling apparatus or the assembling method of the present invention, when expanding both the arm portions of the torsion coil spring, only the relative movement of the torsion coil spring holding means holding the torsion coil spring with respect to the engaging portion is performed. Done. During this movement, the two arms are spread along the inclined portion.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a torsion coil spring assembling apparatus 1 (hereinafter, also simply referred to as an assembling apparatus) according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. .

Lower step 2 of stepped base plate 2
The spring mounting base 3 is fixed to b by bolts 4. As shown in FIG. 6, a through hole 3
The coil portion fitting projection 6 is supported by the coil spring 5 disposed in the through-hole 3a, and is elastically provided with the tip 6a protruding from the upper surface of the mounting table 3. The coil portion 73a of the lid lock spring 73 is fitted and set in the tip 6a of the projection 6. Further, as shown in FIG. 1, a rectangular arm portion guide piece 7 is fixed to the upper surface of the spring mounting table 3 with a bolt 8. The arm portion guide piece 7 has a corner 7a located near the coil portion fitting projection 6.

An L-shaped lid guide 9 is fixed to the upper portion 2a of the base plate 2 with bolts 10. Further, the upper portion 2a is provided with the lid guide 9 and the upper surface of the upper portion 2a together with the mounting object holding area A. Lid guide 11 that forms
Are fixed with bolts 12. The base plate upper section 2a and the lid guides 9 and 11 constitute an integrated body holding means for holding the integrated body by the mounting apparatus 1.

In the lower step 2b of the base plate 2, a rail 13 having a substantially U-shaped cross section extending along the longitudinal direction of the base plate 2 between the step 2c and the spring mounting base 3 is shown with its opening facing upward. Not bolted.

The rail 13 has a recess 13a.
The slide member 14 extending along the extension direction of the rail 1
3 is slidably engaged. A slide base 16 is fixed to the upper surface of the slide member 14 with bolts 15. Therefore, the slide base 16 is mounted on the rail 1
3 and is freely movable between the spring mounting table 3 and the stepped portion 2c.

The rail 1 is mounted on the upper surface of the slide base 16.
A prism member 17 extending in a direction perpendicular to the direction in which the third member 3 extends is fixed by bolts 18. The length of the prism member 17 is greater than the length of the slide base 16 in the short direction, and both ends 17
a and 17 b protrude from the slide base 16. A bolt 19 is screwed to one end 17 a of the prism member 17, and one end of a coil spring 20 is hung on the shaft of the bolt 19. The other end of the coil spring 20 is hung on a shaft of a bolt 21 screwed to the upper step 2a of the base plate 2. The coil spring 20 is stretched and hung from the natural state between the two bolts 19 and 21, and urges the slide base 16 toward the upper step 2a.

At the other end 17 b of the prism member 17, a bolt 23, which is prevented from rotating by a lock nut 22, is screwed from the spring mounting base 3 side to the upper step 2 a side. 23a is in contact with an L-shaped stopper member 24 fixed to the lower portion 2b of the base plate. That is, the bolt tip 23a and the stopper member 2
The movement of the slide base 16 toward the upper step 2a is restricted by contact with the slide base 16.

On the upper surface of the base plate 16, an arm expanding means 25 extending toward the mounted object holding area A is fixed by bolts 26. Therefore, the arm portion expanding means 2
5 is movable in the direction indicated by arrow B together with the slide base 16. Alternatively, instead of the coil spring 20, a drive cylinder for driving the coil spring 20 in the extending direction is provided, and the drive rod is directly connected to the prism member 17 or the slide base 16, so that the slide base 16 is formed. The reciprocating operation may be performed in the direction indicated by arrow B.

Next, the arm expanding means 25 will be described with reference to FIG. 9C which shows a perspective view of the arm expanding means 25 and FIG. 8 which shows a side view. Arm part expanding means 2
5, a first inclined surface 27a inclined forward and downward, a first vertical surface 27b formed at a right angle to the first inclined surface 27a, and a first vertical surface 27b.
And a second vertical surface 28b adjacent to the second vertical surface 28b forming an angle θ of about 125 degrees with the upper side portion 27aa of the first inclined surface 27a and downwardly inclined to the opposite side to the first inclined surface 27a.
An inclined surface 28a is formed.

A downwardly inclined edge portion which is a boundary between the first inclined surface 27a and the first vertical surface 27b, and the second vertical surface 2
The downwardly sloping edges, which are the boundaries between the first and second inclined surfaces 8b and 28a, are respectively inclined portions 30a and 30 according to the present invention.
b. That is, the two inclined portions 30a, 30b
Open downward in a reverse V-shape. A notch 31 is formed at the tip end of the arm portion expanding means 25 from the lower surface side, and the lower side of the first inclined surface 27a has an eaves shape.

Next, the torsion coil spring holding means 33 will be described with reference to FIGS. Shaft members 35 and 36 are inserted above and below a stepped through hole 34a formed in the cylindrical member 34, respectively. The upper shaft member 35 is bolted to the cylindrical member 34 by bolts 37. Fixed. The lower shaft member 36 is disposed in the through hole 34a and has both ends at the lower end of the shaft member 35 and the shaft member 3 respectively.
The distal end portion 36a is supported by a coil spring 38 fixed to the upper end of the projection 6 so as to protrude from the through hole 34a. A slot 36a is provided at the tip 36a of the shaft member 36.
a is formed in the axial direction, and the edge is chamfered to form a tapered portion 36ab.

The cylindrical member 34 is fixed to a bracket 39, and the torsion coil spring holding means 33 is connected to a driving rod of a cylinder device (not shown) via the bracket 39. Thereby, the torsion coil spring holding means 3
Numeral 3 enables the vertical movement with respect to the spring mounting table 3 as indicated by the arrow C in FIG. 1, the horizontal movement as indicated by the arrow B, and the vertical movement with respect to the mounted body holding area A as indicated by the arrow D.

Each of the members constituting the installation device 1 described above is made of a metal material such as stainless steel or an aluminum alloy.

Next, how the lid lock spring 73 using the assembling device 1 is incorporated into the above-described lid 70 and slider 71 as an assembly target will be described.

First, as shown in FIG. 3, the slide base 16 is moved toward the spring mount 3 against the urging force of the coil spring 20 by, for example, putting a finger on the prism member 17. Alternatively, the driving rod is connected to the prism member 17 or the slide base 16 by a cylinder device having a driving rod for driving the coil spring 20 in the extending direction, instead of the coil spring 20, and the driving rod is driven. May be used to move the slide base 16.
The movement of the slide base 16 causes the arm expanding means 2 to move.
5 also moves to the spring mounting base 3 side, and the tip of the arm part expanding means 25 comes off from the to-be-embedded body holding area A. In this state, the lid 70 and the slider 71, in which the lid lock spring 73 is not yet assembled, are moved to the side plate portions 70a, 71a having the support shaft 70aa and the lid lock member 72.
Is fitted into the to-be-embedded body holding area A such that the inner surface of the body faces upward.

As shown in FIG. 4, the lid 70 and the slider 71 are prevented from falling down by the lid guides 9 and 11, and are held in the illustrated position. And lid 70
When the slider 71 is fitted into the to-be-embedded body holding area A, the finger on the prism member 17 is released, or the arm portion expanding means 25 is returned to the original position by driving the drive rod of the cylinder device. That is, when the tip 23a of the bolt 23 contacts the stopper member 24, the movement of the slide base 16 toward the lid 70 and the slider 71 is restricted.
a, 30b are, as shown in FIG. 9A, support shafts 70aa,
It is positioned slightly above the engagement portion 71ab and the lid lock member 72. At this time, as described above, the notch 31 is formed at the tip end of the arm portion expanding means 25 from the lower surface side.
Is formed, and the eaves are formed.
Can be avoided. The position of the inclined portions 30a and 30b can be adjusted by rotating the bolt 23 and adjusting the amount of protrusion of the shaft portion from the prism member 17.

Since a slight gap is formed between the lower surface of the arm portion expanding means 25 and the upper surface of the lid guide 11, the lid guide 11 is provided with the arm portion expanding device 25.
Will not hinder the movement of

On the other hand, a lid lock spring 73 is set on the spring mounting table 3. Lid lock spring 7
3, as shown in FIG. 4, the coil part 73a is fitted into the projection tip part 6a, and the two arm parts 73
opposing inner sides of the guide pieces 7b and 73c
The two corners 7a contact the two side surfaces which are branched to prevent rotation and are positioned in a predetermined direction.

Next, the torsion coil spring holding means 33 descends with respect to the spring mounting table 3. As shown in FIG. 7, the distal end portion 36 a of the shaft-shaped member 36 abuts on the distal end portion 6 a of the projection 6, and the coil spring 38 on the torsion coil spring holding means 33 side has the coil on the spring mounting table 3 side. Since the spring 6 has a greater spring force than the spring 5, the projection 6 is pushed down into the mounting table 3, and is guided by the tapered portion 36 ab and inserted into the coil portion 73 a of the torsion coil spring 73.

The tip portion 3 of the shaft member 36 is attached to the coil portion 73a.
After the insertion of 6a, the distal end portion 36a of the shaft-like member 36 is pushed into the through hole 34a, so that the impact given to the coil portion 73a is relieved and damage and deformation are prevented. The outer diameter of the distal end portion 36a of the shaft-shaped member 36 is slightly larger than the inner diameter of the coil portion 73a. Therefore, the distal end portion 36a is formed by reducing the width of the slit groove 36aa from the natural state shown in FIG.
The coil portion 73a is held by the distal end portion 36a of the shaft-like member 36 by the elastic restoring force of the distal end portion 36a radially outward. Since such a holding method is not affected by the elastic force of the torsion coil spring 73 at all, even a small torsion coil spring can be easily held. The wire diameter of the torsion coil spring 73 is about 0.2.
3 mm, the inner diameter of the coil 73a is about 2.5 mm, and the length of each of the arms 73b and 73c is about 3 mm.

Next, the torsion coil spring holding means 33
Rises again while holding the torsion coil spring 73, and moves linearly in the direction indicated by arrow E in FIG. 4 to the position indicated by the dashed line. Then, descending from this position, the torsion coil spring 73 is incorporated into the assembly (lid 70 and slider 71) by the operation described below with reference to FIG. In FIG. 9, illustration of the torsion coil spring holding means 33 is omitted to clearly show how the torsion coil spring 73 is incorporated. Also, illustration of the lid 70 and the slider 71 is omitted, and only the engagement portion 71ab, the support shaft 70aa, and the lid lock member 72 are shown.

When the torsion coil spring holding means 33 linearly descends in the axial direction of the support shaft 70aa from the position shown by the one-dot chain line in FIG. 4, the torsion coil spring 73 held by the torsion coil spring holding means 33 Also descends, and FIG.
As shown in FIG.
, And the other arm portion 73c contacts the inclined portion 30b.

At this time, the torsion coil spring 73 is still in a natural state, and the angle θ between the two arm portions 73b and 73c is set.
One is about 70 degrees. Then, further lowering of the torsion coil spring holding means 33 causes both arm portions 73b and 73c to move.
Are inclined portions 30a and 30b that open downward in an inverted V-shape.
9A, it spreads in a direction away from the natural state shown in FIG. 9A as shown in FIG. 9B (in the state shown, the angle θ1 is about 200 degrees). And
When the elastic contact with the inclined portions 30a and 30b is released by further lowering (when both the arm portions 73b and 73c enter a state below the distal end of the arm portion expanding means 25), FIG. 9C.
As shown in FIG.
And the other arm portion 73c is in contact with the lid lock member 7.
2 and elastically contact the engaging portion 72a. The angle θ1 at this time is about 160 degrees.

The tip 36a of the shaft member 36 of the torsion coil spring holding means 33 is in contact with the support shaft 70aa, and is opposed to the spring force of the coil spring 38 in the cylindrical member 34 shown in FIG. By being retracted, the coil portion 73a fitted in the distal end portion 36a comes off and the support shaft 70aa
Fit in. Thus, the torsion coil spring 73
The arms are resiliently attached to the engaging portions 71ab and 72a, respectively, with the arms 73b and 73c expanded from the natural state.

When the lid lock spring 73 is assembled in this manner, the torsion coil spring holding means 33
Is moved to the initial position above the spring mounting table 3 and
The arm expanding means 25 is moved to the spring mounting base 3 side, and as shown in FIG. 3 described above, the distal end portions (inclined portions 30a, 30b) are removed from the mounted body holding area A, and the lid 70 and The slider 71 is removed from the mounted object holding area A.

In the present embodiment, the torsion coil spring 73
In the operation of expanding both arm portions 73b and 73c of
It is merely a linear lowering of the torsion coil spring holding means 33, and does not require complicated movement as in the prior art. Also,
The torsion coil spring 73 is positioned in a predetermined direction on the spring mounting table 3 in advance, and is held by the torsion coil spring holding means 33 while maintaining this posture to perform the above-described movement. It is not necessary to turn the 33 at the position indicated by the dashed line in FIG. 4 to perform complicated position adjustment, and the adjustment operation can be simplified. That is, in the present embodiment, the movement in the assembling operation includes ascending and descending with respect to the spring mounting table 3 indicated by an arrow C in FIG. Since only three linear movements of the torsion coil spring holding means 33, which are driven by three air cylinder devices for elevating and lowering the body holding area A, are required, a complicated position adjustment is unnecessary, and Can be shortened. Further, the embedded device 1 of the present embodiment can be manufactured at about half the price of a conventionally used expensive robot, so that the cost can be reduced, and since the size is smaller, the space can be saved.

Further, if a plurality of the incorporation devices 1 are provided, the torsion coil springs 73 can be simultaneously moved up and down and horizontally moved by the driving force from the air cylinder device or the like. A plurality of units can be simultaneously incorporated into the corresponding to-be-incorporated bodies (lid 70 and slider 71), thereby increasing production efficiency.
Moreover, each embedded device 1 is small and inexpensive,
Furthermore, since one air supply source can be used in common (the air supply destination is switched by a solenoid valve or the like), even if a plurality of built-in devices 1 are provided, the cost does not increase significantly and the installation space is large. do not need.

Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 11 is an enlarged view of the shaft member 36 which is a main component of the torsion coil spring holding means 33 shown in the first embodiment. The shaft-like member 36 has a tapered portion 36ab in which the edge of the tip portion 36a is slightly chamfered.
But the coil portion 73 of the torsion coil spring 73
The size of the outer diameter of the portion where a is fitted is constant.
The size of the outer diameter is slightly larger than the inner diameter standard value of the coil portion 73a. However, in actuality, the inner diameter of the coil portion 73a may vary from the standard value due to manufacturing, and the tip portion 3 into which the coil portion 73a fits.
If the outer diameter of the coil 6a is constant, it may not be possible to cope with variations in the inner diameter of the coil portion 73a, and it may not be possible to properly pick up the coil 73a.

Further, as described above with reference to FIG. 9, at the time of assembling, the torsion coil spring 73 is
6 while being held at the distal end portion 36a of both arms 73.
b and 73c are expanded, and the coil portion 73a is reduced in diameter accordingly. Therefore, when the inner diameter of the coil portion 73a is small, the coil portion 73a is strongly wound around the outer peripheral surface of the distal end portion 36a. Had been raised. Further, in extreme cases, both arm portions 73b,
When the coil 73c is expanded, the diameter of the coil 73a cannot be tolerated, and an excessive force may be applied to both arms 73b and 73c to deform the coil 73a.

Therefore, as shown in FIG. 12, in the shaft member 40 of the second embodiment, the coil portion 73a
(In the axial direction), the tapered portion 40a is formed at a height larger than the height (in the axial direction).
The coil portion 73a is fitted to the coil portion 0a. The maximum outer diameter of the tapered portion 40a is slightly larger than the inner diameter standard value of the coil portion 73a. The tapered portion 40a
The height and the maximum outer diameter of the torsion coil spring 73 to be fitted are appropriately set according to the height and the inner diameter standard value of the coil portion 73a. As long as the coil portion 73a can be fitted, the height of the tapered portion 40a may be smaller than the height of the coil portion 73a. Further, as in the first embodiment, the torsion coil spring 73 is held by the elastic restoring force in the radially expanding direction of the slit 36aa compressed when the torsion coil spring 73 is inserted.

As described above, in the present embodiment, the coil portion 73a is formed by the tapered portion 40a having an outer diameter having a width.
Is fitted, it is possible to flexibly cope with a large variation in the inner diameter of the coil portion 73a, and it is possible to reduce a pick-up failure generated at the distal end portion of the shaft member 40. As a result of confirming the defective pickup rate using the torsion coil spring 73 that satisfies the shape standard, in the first embodiment, the defective pickup rate occurring at the tip of the shaft-shaped member 36 was 20%. In the present embodiment, the defective pickup rate occurring at the tip of the shaft-shaped member 40 could be 0% (none).

Further, even when the arm portions 73b and 73c are expanded and the coil portion 73a is tightened, the taper portion 40a absorbs the tight tightening. Arms 73b, 73
c can be assembled without applying a force that causes permanent deformation.

FIG. 13 shows a shaft member 60 according to a modification. As in the case of the shaft member 40 shown in FIG. 12, a tapered portion 60a into which the coil portion 73a can be fitted is formed at the distal end. Therefore, the same operation and effect as those of the shaft member 40 can be obtained, and the defective pickup rate can be reduced to 0%. Further, as another feature, a step portion 60b is formed between the tapered portion 60a and a straight shaft portion 60c having a constant outer diameter. With such a configuration, at the time of pickup, the coil portion 73a is caught on the step portion 60b,
The upward movement of the torsion coil spring 73 is restricted, and the holding position of the torsion coil spring 73 can be kept at the tip of the shaft member 60. At the time of installation described with reference to FIG. This allows the torsion coil spring 73 to smoothly come out of the spring 60.

Next, a third embodiment of the present invention will be described. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

First, FIG. 14 is a view showing an operation of assembling the torsion coil spring 73 according to the first embodiment described above. Recessed engaging portion 7
FIG. 3 is a diagram schematically showing an engagement portion 71ab of the slider 2a and a slider 71. The relationship between the arm 73c and the engaging portion 72a in FIG. 14 is shown in the enlarged perspective view of FIG. In addition,
In order to make it easy to understand the correspondence between FIG. 14 and FIG. 16 between the engaging portion 72a and the flat surface 72aa protruding above the engaging portion 72a on the upper side, the engaging portion 72
a is indicated by hatching, and the flat surface 72aa is indicated by cross hatching.

In the first embodiment, of the two arm portions 73b and 73c, the upper arm portion 7b of the two arm portions 73b and 73c is formed due to a variation in the shape of the torsion coil spring 73 caused by manufacturing.
There is a case where the engagement between the engagement portion 3c and the engagement portion 72a of the lid lock member 72 is unstable. That is, the arm 73c
The engaging portion 72a must be engaged with the engaging portion 72a by the urging force of the elastic restoring force acting toward the engaging portion 72a. However, the arm portion 73c does not descend to the engaging portion 72a, and the flat surface 72aa on the upper surface 73aa. They may be in contact with each other (the state shown in FIG. 16). In this case, the torsion coil spring 73 is temporarily incorporated, but in this case, since the arm portion 73c is merely elastically in contact with the flat surface 72aa, there is a possibility that the arm portion 73c will come off when vibration or impact is applied. For this reason, the lowering speed of the torsion coil spring holding means 33 is increased, and the arm portion 73c is inserted into the engagement portion 72a with the momentum. However, in this case, the torsion coil spring 73 may be damaged or deformed. .

Therefore, in the third embodiment, as shown in FIG. 15, a cylindrical member 50 (corresponding to the cylindrical member 34 of the first embodiment) for holding the shaft member 36 so as to be vertically movable. A pressing surface 50a having a slope is formed on the lower end surface of the above (2). The pressing surface 50a is inclined downward toward the arm 73c. At the time of assembly, the pressing surface 50
The torsion coil spring 73 is pressed by a. Thus, the arm portion 73c falls down below the flat surface 72aa along the inclination of the pressing surface 50a, and can be securely engaged with the engaging portion 72a (the state of FIGS. 15A and 25). At this time, the entire torsion coil spring 73 is temporarily inclined obliquely. However, as shown in FIG.
When “a” comes off from the shaft member 36, a normal horizontal posture is obtained.

The degree of the inclination of the pressing surface 50a depends on the tip portion 36.
a, the torsion coil spring 73 is chucked and the cylindrical member 5
When the torsion coil spring 73 is pushed down to the bottom of the support shaft 70aa of the lid 70 by lowering 0, the arm portion 73c does not come into contact with the flat surface 72aa and is located below the flat surface 72aa. Is set as follows.
Specifically, in the present embodiment, the inclination is about 3 ° with respect to the horizontal plane. Note that the thickness (width in the height direction) of the flat surface 72aa is about 0.2 mm.

As described above, in the present embodiment, a simple structure in which the lower end surface of the tubular member 50 that comes into contact with the torsion coil spring 73 is simply provided with a gradient without providing a special mechanism, thereby ensuring reliable operation. Incorporation can be achieved. In the first embodiment, the success rate of assembling in which the arm portion 73c is firmly engaged with the engaging portion 72a using the torsion coil spring 73 satisfying the shape standard is 80%. 1 in form
00%.

Next, a fourth embodiment of the present invention will be described. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 17 is an enlarged perspective view of the arm expanding means 43 of the fourth embodiment, and FIG. 18 is a view corresponding to FIG. 9 in the first embodiment.

In the arm portion expanding means 43 of this embodiment, the inclined portions 44a and 44b are oriented in the direction parallel to the downward direction (vertical direction) Y of the torsion coil spring 73 held by the torsion coil spring holding means 33. The inclination is set to be steeper than that of the inclined portions 30a and 30b of the first embodiment so as to be closer. Specifically, the angle θ2 shown in FIG. 17 was set to 30 °. The inclined portion 4 having such an angle θ2 = 30 °
In order to realize 4a and 44b, the thickness t of the arm portion expanding means 43 is 6.5 mm, which is about twice that of the first embodiment.
And

With such a configuration, the arm portions 73b and 73c and the inclined portion 44 are different from those of the first embodiment.
a, 44b, the contact pressure at the time of elastic contact is reduced, and the coil spring 73 receives the reaction force (increases the torsion coil spring 73 or the arm portions 73b, 73b) from the inclined portions 44a, 44b.
c), which can cause deformation of c. Thereby, the posture of the torsion coil spring 73 at the time of assembling can be stabilized, and normal assembling can be performed.
The deformation of b and 73c can be prevented.

Further, the inclined portion 3 in the first embodiment
Since 0a and 30b are formed linearly, FIG.
As shown in FIG. 9B, as the torsion coil spring 73 descends, the inclined portions 30 of the arm portions 73b and 73c are moved.
The elastic contact positions for a and 30b move to the ends. This has also been a factor for generating a force for pushing up the torsion coil spring 73. Therefore, in the present embodiment, the inclined portion 44
a and 44b were curved upwardly convex. Thus, during the lowering of the torsion coil spring 73, the elastic contact positions of the arm portions 73b, 73c with the inclined portions 30a, 30b can be kept at a constant position close to the center of the coil portion 73a without moving to the end. Therefore (FIG. 18A → FIG. 18B), the pushing force acting on the torsion coil spring 73 from the inclined portions 44a and 44b can be minimized, and the posture of the torsion coil spring 73 can be stabilized and deformation can be prevented.

The opening angle θ1 between the engaged arm portions 73b and 73c shown in FIGS. 9C and 18C.
Is about 160 °, so that the arm 73
b and 73c need to be spread at least more than 160 °. However, in the first embodiment, as shown in FIG. 9B, it spreads more than necessary (the angle θ1 is about 200 °). This also causes the posture of the torsion coil spring 73 to become unstable, and causes deformation of the arm portions 73b and 73c.

Therefore, in the present embodiment, the inclined portion 44
The opening angle between a and 44b (θ ′ shown in FIG. 17) is smaller than in the first embodiment (the angle θ shown in FIG. 8).
Thus, as shown in FIG. 18B, in the present embodiment, the arm portions 73b and 73c have a maximum of about 165 ° (= θ1 ′).
Because it can be spread only to the extent, the arm 73
The elastic restoring force of the b and 73c can be reduced, the force received as a reaction force from the inclined portions 44a and 44b is also reduced, and the posture of the torsion coil spring 73 can be stabilized and deformation can be prevented. Note that, similarly to the first embodiment, the engaging portion 71ab is also provided in the arm portion expanding means 43 of the present embodiment.
Notch 45 is formed to avoid interference with

As described above, in this embodiment, the posture of the torsion coil spring 73 at the time of assembly can be stabilized, and the deformation of the arm portions 73b and 73c can be prevented.
Deformation defects can be reduced. Using the torsion coil spring 73 that satisfies the shape standard, the arm portions 73b, 7
As a result of confirming the rate of defective spring deformation such as deformation of 3c,
In the present embodiment, it was 5%, but in the present embodiment, it could be omitted. Note that the angle θ2 is 30
The same effect can be obtained when the angle is not more than 30 ° and is 30 ° or less (> 0 °). Further, the angle θ1 ′ in the state shown in FIG. 18B is required to be at least larger than the opening angle 160 ° between the two arm portions 73b and 73c in the state of being engaged with the engaging portions 71ab and 72a, and 180 °. If smaller, excessive opening of both arms 73b and 73c is suppressed, and the above-described effect is obtained.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited to these embodiments.
Various modifications are possible based on the technical idea of the present invention.

FIG. 10 shows a modification of the arm section expanding means. The arm section expanding means 51 is different from the arm section expanding means 25 of the first embodiment in that the arm section expanding means 25 is in contact with the engaging section 71ab. Only the configuration of the notch formed to avoid interference is different. That is, a notch 53 is formed in a U-shape from the front side at the front end of the arm portion expanding means 51, and as shown in FIG. It does not hinder the positioning of the expanding means 51 at the position shown. Of course, the notch 53 having such a configuration is also provided in the arm portion expanding means 43 of the fourth embodiment.
5 may be applied.

In addition to the lid lock spring 73 being mounted on the lid 70 and the slider 71, the mounting device 1 can be mounted on a body to be mounted by expanding both arms of a general torsion coil spring. Can be used for

Instead of moving the torsion coil spring holding means 33, the base plate 2 may be moved up and down and in the horizontal direction with respect to the torsion coil spring holding means 33 to perform the above-described mounting. .

The inclined portions 30a, 30b, 44a, 4
Instead of using 4b as an edge, it may be a curved surface with a radius or a flat surface with a narrow width.

Further, a configuration in which the second and third embodiments are combined, a configuration in which the second and fourth embodiments are combined, a configuration in which the third and fourth embodiments are combined,
A configuration in which the second, third, and fourth embodiments are combined may be adopted.

[0073]

According to the first aspect of the present invention, it is possible to reduce the cost and size of the torsion coil spring assembling device, and to easily assemble the torsion coil spring with only a simple operation without taking much time. Can be incorporated into the box.

According to the second aspect of the present invention, it is possible to accurately position the arm portion expanding means at a predetermined position while avoiding interference with the support shaft and the engaging portion formed on the assembly.

According to the third aspect of the present invention, the contact pressure between the arm portion and the inclined portion is reduced, and the posture of the torsion coil spring at the time of assembling is stabilized, so that assembling errors can be reduced. Further, the deformation of the arm portion can be prevented.

According to the fourth aspect of the present invention, the posture of the torsion coil spring at the time of assembling can be stabilized by preventing the arm portion from being unnecessarily widened at the time of assembling, thereby reducing assembling errors.

According to the fifth aspect of the present invention, the fluctuation of the elastic contact position of the arm portion with respect to the inclined portion at the time of assembling can be suppressed, and the posture of the torsion coil spring at the time of assembling can be stabilized to reduce assembling errors.

According to the sixth aspect of the present invention, even a small torsion coil spring can be easily held.

According to the seventh aspect of the present invention, the insertion of the tip of the shaft-like member of the torsion coil spring holding means into the coil portion is smoothly guided and facilitated.

According to the eighth aspect of the present invention, it is possible to flexibly cope with the dimensional variation of the inner diameter of the coil portion of the torsion coil spring, thereby preventing a pickup error, improving the detachability after assembling, and improving the arm. The deformation of the part can be prevented.

According to the ninth aspect of the present invention, deformation and damage of the torsion coil spring when the torsion coil spring is held can be prevented.

According to the tenth aspect of the present invention, the arm portion can be securely engaged with the engaging portion.

According to the eleventh aspect of the present invention, a plurality of torsion coil springs can be simultaneously incorporated into the body to be assembled without increasing the cost and the size of the equipment, thereby increasing the production efficiency. .

According to the twelfth aspect of the present invention, when assembling the torsion coil spring, the torsion coil spring can be moved only linearly without causing the torsion coil spring holding means to perform a complicated relative movement with respect to the target body. Can be incorporated into the assembly.

According to the thirteenth aspect of the present invention, the torsion coil spring can be easily incorporated into the body to be assembled with only a simple operation and without taking much time.

According to the fourteenth aspect of the present invention, when the torsion coil spring is assembled, the torsion coil spring is covered only by a linear motion without causing the torsion coil spring to perform complicated relative movement with respect to the body to be assembled. It can be incorporated into an assembly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a device for assembling a torsion coil spring according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the assembly device.

FIG. 3 is a perspective view illustrating an operation of setting an assembly target body in the assembly device.

FIG. 4 is a perspective view showing a state in which a body to be mounted is set in the mounting apparatus, and a torsion coil spring is positioned and set on a mounting table.

FIG. 5 is a front view of the torsion coil spring holding means.

FIG. 6 is a sectional view of a mounting table.

FIG. 7 is a view for explaining a holding action of the torsion coil spring by the torsion coil spring holding means.

FIG. 8 is a front view of an arm portion expanding unit according to the first embodiment.

FIG. 9 is a view for explaining the incorporation operation of the torsion coil spring using the arm section expanding means of the first embodiment, wherein A shows the arm section expanding means together with the torsion coil spring holding means; B shows a state in which the arm portion has been lowered to above the inclined portion formed therein, B shows a state in which the arm portion is expanded while elastically contacting along the inclined portion, and C shows an engagement portion in which the arm portion is formed on the incorporated body. 2 shows a state in which it is elastically attached to a part.

FIG. 10 is a perspective view showing a modification of the arm section expanding means.

FIG. 11 is an enlarged side view of the shaft member according to the first embodiment, showing a state where the torsion coil spring is chucked.

FIG. 12 is an enlarged side view of a shaft-like member according to a second embodiment, showing a state where a torsion coil spring is chucked.

FIG. 13 is an enlarged side view of a shaft member according to a modification;
4 shows a state in which the torsion coil spring is chucked.

FIG. 14 is a diagram illustrating an operation of attaching a torsion coil spring to an assembly target in the first embodiment.

FIG. 15 is a diagram illustrating an operation of assembling a torsion coil spring into a body to be assembled according to a third embodiment.

FIG. 16 is an enlarged perspective view of an engagement portion of the lid lock member, showing an incompletely engaged state of the arm portion.

FIG. 17 is a perspective view of an arm section expanding unit according to a fourth embodiment.

FIG. 18 is a view for explaining an assembling operation of a torsion coil spring using the arm section expanding means of the fourth embodiment;
Indicates a state in which the torsion coil spring has descended above the inclined portion formed in the arm portion expanding means together with the torsion coil spring holding means, and B indicates a state in which the arm portion has been expanded while elastically contacting along the inclined portion. , C show a state in which the arm portion is elastically contacted with the engaging portion formed on the body to be assembled.

FIG. 19 is a view showing a main part of a lid as a body to be assembled and an inner surface of one side of the slider, and FIG. 19A shows a state where the lid is held at a closed position by a lid lock spring and a lid lock member. , B show a state where the lid lock member is unlocked and the lid is turned toward the open position.

FIG. 20 is an enlarged perspective view of a portion shown in FIG. 19A.

FIG. 21 is a plan view of the lid and the slider and the upper shell before being assembled to each other.

FIG. 22 is a plan view showing a state where a lid and a slider are assembled to an upper shell.

23A and 23B are diagrams illustrating a conventional incorporation of a torsion coil spring. FIG. 23A illustrates a state in which a pin is lowered toward the torsion coil spring, and FIG. It shows the state that it was.

FIG. 24 is a view subsequent to FIG. 23, and FIG. 24A is a view in which the torsion coil spring held in a state where the arm portion is spread by the pin descends to the engaging portion, and both arm portions elastically contact the engaging portion and are covered. B indicates a state in which the pin has been lifted and the assembly has been completed.

FIG. 25 is an enlarged perspective view of an engagement portion of the lid lock member, showing a state where the arm portion is completely engaged.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Torsion coil spring installation apparatus, 2 ... Base plate, 3 ... Spring mounting base, 6 ... Projection, 7 ... Guide piece, 9
... lid guide, 11 ... lid guide, 16 ... slide base, 25 ... arm part expanding means, 30a ...
Inclined portion, 30b ... Inclined portion, 31 ... Notch, 33 ...
Torsion coil spring holding means, 36: shaft member, 36a
a slot groove, 36ab taper portion, 40 shaft member, 40a taper portion, 43 arm expanding means, 44a inclined portion, 44b inclined portion, 45 inclined portion Notch, 50a ... pressing surface, 51 ... arm expanding means,
53 Notch, 60 Shaft-shaped member, 60a Tapered portion, 60b Stepped portion, 70 Lid, 70aa Support shaft, 71 Slider, 71ab Engagement portion, 72
... lid lock member, 72a ... engagement part, 73 ... lid lock spring, 73a ... coil part, 73b ...
... arm part, 73c ... arm part, 80 ... upper shell,
A: A mounting object holding area.

Claims (14)

[Claims] 1. A coil part of a torsion coil spring is fitted on a support shaft formed on a body to be mounted, and two arms extending from the coil part are spread in a direction away from a natural state in the direction to be separated from the body. What is claimed is: 1. A torsion coil spring assembling device for engaging an engaging portion formed on a body, comprising: a to-be-embedded body holding means for holding said to-be-embedded body; and a torsion coil spring holding for holding said torsion coil spring. Means, and an arm part expanding means having two inclined parts which can be elastically contacted with the respective arm parts, wherein the torsion coil spring holding means is relative to the support shaft and the engaging part. The two inclined portions are positioned at predetermined positions in the vicinity of the engagement portion, and are open toward the engagement portion in a divergent manner. The torsion coil spring holding means is held by the two inclined portions. Said twisted carp The arm portion is expanded by moving the axial direction of the support shaft closer to the support shaft and the engagement portion by the relative movement while elastically contacting each of the arm portions of the spring with the inclined portion. A torsion coil spring assembling device, wherein the device is engaged with the engaging portion. 2. A notch formed in said arm portion expanding means for avoiding interference with said support shaft and said engaging portion when said inclined portion is positioned at said predetermined position. 2. A device for assembling a torsion coil spring according to claim 1. 3. The device according to claim 1, wherein an inclination angle of the inclined portion with respect to the direction of the relative movement is 30 ° or less. 4. In the engagement, the arm portion extends between the two inclined portions so that the arm portion expands more than a minimum angle required to enable engagement with the engagement portion and does not spread more than 180 °. The installation device of the torsion coil spring according to claim 1, wherein an opening angle of the torsion coil spring is set. 5. The device according to claim 1, wherein the inclined portion has an upwardly convex curved shape. 6. The torsion coil spring holding means includes a shaft-shaped member having a slot formed at a tip end thereof, the shaft-like member being fitted into the coil portion and capable of exerting an elastic restoring force in a radially expanding direction. The installation device of the torsion coil spring according to claim 1, wherein: 7. The device according to claim 6, wherein a tapered portion is formed at the distal end. 8. The torsion coil spring assembling device according to claim 7, wherein said tapered portion is large enough to fit said coil portion of said torsion coil spring. 9. The device according to claim 6, wherein the shaft-like member is elastically urged toward the distal end in the axial direction. 10. The torsion coil spring holding means presses the torsion coil spring in accordance with the movement, and tilts one of the arm portions toward the engagement portion corresponding to the arm portion to engage the engagement portion. 2. The device according to claim 1, wherein a gradient is formed on the pressing surface to be engaged with the torsion coil spring. 11. A plurality of said to-be-embedded body holding means, said torsion coil spring holding means, and said arm portion expanding means are provided in a plurality corresponding to each other, and said plurality of torsion are provided by a driving force from a driving source. The relative movement of the coil spring holding means is performed simultaneously to approach the corresponding support shaft and the engaging portion, respectively, and the plurality of torsion coil springs respectively correspond to the to-be-installed body at the same time. The incorporation device of the torsion coil spring according to claim 1, wherein the device is incorporated in a torsion coil spring. 12. A mounting table provided with a projection on which the coil section is fitted, and a guide piece abutting on the opposite inside of the arm section, wherein the torsion coil spring is formed by the projection and the guide piece. The torsion coil spring is held and picked up from the table by the torsion coil spring holding means while maintaining the predetermined direction while maintaining the predetermined direction, and the relative movement is performed. The device for assembling a torsion coil spring according to claim 1, wherein the device is incorporated into a torsion coil spring. 13. A torsion coil spring in which a coil portion is fitted on a support shaft formed on an assembly body, and two arms extending from the coil portion are spread in a direction away from a natural state in the assembly direction. A method of assembling a torsion coil spring to be engaged with an engaging portion formed on a body, wherein each of the arm portions is positioned at a predetermined position near the engaging portion and diverges toward the engaging portion. The torsion coil spring is moved in the axial direction of the support shaft relative to the support shaft and the engagement portion while elastically contacting the two inclined portions formed by opening, so that the support shaft and the engagement member are moved. A method for assembling a torsion coil spring, characterized in that the arm portion is expanded and engaged with the engaging portion by approaching the joint portion. 14. Prior to performing said relative movement of said torsion coil spring, said torsion coil spring is positioned in a predetermined direction, and said relative movement of said torsion coil spring is maintained while maintaining said predetermined direction. 14. The method for assembling a torsion coil spring according to claim 13, wherein the torsion coil spring is incorporated into the body to be assembled.