JPH0724996B2 - Tension spring mounting device - Google Patents

Description

The present invention relates to recording / recording using, for example, a magnetic tape cassette.
The present invention relates to a tension spring attachment device that is preferably used when attaching a tension spring to a playback device.

2. Description of the Related Art A recording / reproducing apparatus using a magnetic tape cassette uses a tension spring, and the running force of the magnetic tape is controlled by the spring force of the tension spring.

Conventionally, such attachment of the tension spring is performed manually. Therefore, the tension spring mounting device is wrong, or the mounting is incomplete, and the quality is deteriorated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to solve the above-mentioned problems and to provide a tension spring mounting device capable of automatically and surely mounting a tension spring.

MEANS FOR SOLVING THE PROBLEMS The present invention comprises a support piece 4 and an attachment means for attaching the annular engaging end portion 37 of the tension spring 9 and the support piece 4 in the upper and lower first directions A1 and A2. Second direction A6, A7
And a spring stop member 6 provided on the support piece 4 so as to be relatively displaceable in the first directions A1 and A2. , A spring 28 for elastically urging the spring stop member 6 downward, and an engaging end portion 37 of the tension spring 9 that can be inserted, extend in the second direction A6, A7, and are in the natural state of the spring 28. The free end of the spring stopper member 6 can be brought into contact with and separated from the lower end of the spring stopper member 6 by
And the spring hook 8 with respect to the spring stop member 6 in the second direction A
Means 30 and 31 for displacing abutting and deviating from A6 and A7, and a spring pressing member 20 provided on the support piece 4 while preventing vertical displacement, the lower surface of the spring pressing member 20 having a spring hook 8 The spring pushing member 20 which is above and below the lower end of the spring stop member 6 when the spring 28 is compressed, thereby pressing the engaging end portion 37 of the tension spring 9 downward on the lower surface. It is a tension spring attachment device characterized by including.

Operation The tension spring mounting device according to the present invention includes a mounting means for mounting the end portion of the tension spring, and a moving means for moving the mounting means in the up and down first direction and the lateral second direction. It was configured. Therefore, the mounting means can be moved by the moving means above the tension spring to be mounted. The mounting means is displaced by the moving means in the first direction up and down, and the spring hook rod included in the mounting means is displaced to a position where it can be inserted into the end portion of the tension spring. The free end of the spring hook is brought into contact with the lower end of the spring stop member, and the spring hook inserts the annular engaging end of the tension spring. Next, attach the other end of the tension spring to a predetermined position, and in a state where the tension spring is extended, a position where the engagement end of the tension spring faces the place where the engagement end of the tension spring is attached. Is displaced to. Next, by the spring pressing member included in the mounting means,
The engaging end of the tension spring is pressed downward, and the engaging end is hooked at a predetermined position. In this way, the tension spring can be attached automatically and reliably.

Embodiment FIG. 1 is a perspective view showing the structure of an embodiment of the present invention.
A vertically moving means 2 is provided vertically upward from a mounting base 1 extending in the horizontal direction.
Is erected. A moving unit 3 extending in the horizontal direction is provided on a side portion of the elevating unit 2. The moving means 3 is, for example, X
-It can be realized by a Z slide table.
The moving means 3 can be displaced by the elevating means 2 in the vertical direction which is the Z direction indicated by the arrows A1 and A2 which is the first vertical direction. A support piece 4 is attached to the lower surface of the moving means 3.

The support piece 4 can be displaced along the moving means 3 in the horizontal direction which is the X direction indicated by the arrows A3 and A42 which is the second horizontal direction. An elevating plate 5 is provided corresponding to the support piece 4. A round bar-shaped spring stop member 6 projects downward from the support piece 4. Also, the surface 7 of the lift plate 5 facing the support piece 4
A round bar-shaped spring hook 8 extending in the direction of the spring stop member 6
Is fixed. Here, the configurations shown by the reference numerals 4 to 8 constitute the attaching means. Further, the structure including the mounting base 1 to the spring hook rod 8 constitutes a mounting device 10 for the tension spring 9.

In supplying the tension springs 9 to the mounting device 10, the tension springs 9 are fed one by one to the positioning jig 13 via the chute 12 by the vibration feeder 11. The positioning jig 13 is provided at a predetermined position associated with the mounting device 10, and the tension spring 9 is housed in the positioning jig 13 such that its axis is parallel to the vertical direction.

Further, the chassis 14 to which the tension spring 9 is attached by the attaching device 10 is fixed to the pallet 15 and, for example, an arrow mark.
Transported in the A5 direction. On the chassis 14, a tension spring 9
The brackets 16 and 17 to which the
Upright along the direction, engaging notches 18 and 19 are formed in mutually opposite directions with respect to arrow A3.

On the surface 7 of the elevating plate 5, a flat plate-shaped spring pressing member 20 extending in the direction of the spring stopper member 6 is fixed above the spring hook rod 8. The spring pushing member 20 is formed with a U-shaped engagement recess 21 into which the spring stopper member 6 is fitted.

FIG. 2 is a sectional view of the mounting device 10 of FIG. The configuration of the attachment device 10 will be described in more detail with reference to FIG. The support piece 4 has a ceiling plate 22, a bottom plate 23, and side plates 24, 25, and a storage recess 26 formed by being surrounded by these supports is integrally formed with the spring stopper member 6, and the storage recess is formed. A sliding piece 27 that is slidable in the directions of arrows A1 and A2 is arranged in the inside of 26.
The length of the sliding piece 27 in the axial direction is shorter than the length of the storage recess 26 in the same direction, and the sliding piece 27 is provided between the sliding piece 27 and the ceiling plate 22 in the arrow A1 direction. A spring 28 for biasing the spring is provided in the. The spring stop member 6 is an insertion hole formed in the bottom plate 23.
It projects downward through 29.

A cylinder 30 is provided at a predetermined position on the side plate 25 of the support piece 4, and the drive rod 31 is moved by arrows A6, A by, for example, compressed air.
It is displaced in 7 directions. The end of the drive rod 21 opposite to the cylinder 30 is fixed to the lift plate 5. Therefore, lift plate 5
Can move closer to and away from the support piece 4.

The positioning jig 13 is formed with a storage recess 32 for storing the tension spring 9. The storage recess 32 has a first storage portion 34 into which the spring main body 33 of the tension spring 9 is fitted almost exactly from above.
And an annular engaging portion 35, which is integrally formed continuously with the spring body 33, at one end of the tension spring 9, and includes a second storage portion 36 into which the annular engaging portion 35 fits snugly. An engaging portion 37 having the same shape as the engaging portion 35 is also formed at the other end of the tension spring 9.

The lower end of the spring stop member 6 and the lower end of the spring hook 8 are
The positions in the vertical direction are substantially the same. The right end of the spring hook 8 in FIG. 2 is formed to extend to the right in FIG. 2 by a distance l1 from the left end of the engagement recess 21 of the spring pressing member 20.

FIG. 3 is a perspective view of the vicinity of the spring pressing member 20, and FIG. 4 is a plan view of FIG. With reference to FIGS. 1, 3 and 4, the operation of taking out the tension spring 9 housed in the positioning jig 13 by the mounting device 10 will be described. The tension spring 9 is housed in the positioning jig 13 without rattling, and is positioned so that the axis of the annular engaging portion 37 is parallel to the axis of the spring hook 8.

With respect to the tension spring 9 thus positioned, the supporting means 4 and the elevating plate 5 are displaced in the arrow A3 direction by the moving means 3, and the moving means 3 is moved by the elevating means 2 and, accordingly, the supporting piece 4 is moved. And the lift plate 5 is displaced in the arrow A1 direction. On the other hand, the axis of the spring hook 8 is configured to intersect with the axis of the spring stop member 6. Therefore, by combining the displacements as described above, the engaging portion of the tension spring 9 is
The support piece 4 and the lift plate 5 can be moved to a position where the axis of 37 coincides with the axis of the spring rod 8. Further, the spring stopper member 6 is held in the engagement recess 21, and when the spring pressing member 20 is displaced relatively downward with respect to the spring stopper member 6 as will be described later, the lifting plate 5 and the spring hook rod 8 are Guided so that there is no rattling, especially this spring pushing member
The important function of 20 is to push the engaging portion 37 of the tension spring 9 downward by pushing it downward as shown in FIG. The width D1 of the engagement recess 21 in the width direction is slightly larger than the outer diameter D2 of the spring stopper member 6. The outer diameter D4 of the spring hook 8 is smaller than the inner diameter D3 of the engaging portion 37 of the tension spring 9. In FIG. 5, the tension spring 9 is held by the spring stopper member 6 and the spring hook 8. FIG. As described above, the drive rod 31 connected to the cylinder 30 is retracted in the arrow A6 direction after the axis of the spring hook 8 is moved so as to coincide with the axis of the engaging portion 37 of the tension spring 9. . Therefore, the elevating plate 5 and the spring hook rod 8 are inserted through the annular engaging portion 37 of the tension spring 9, and the free end of the spring hook rod 8 abuts the lower end of the spring stopper member 6 to pull the tension spring 9 in place. Can be gripped.

Referring to FIG. 1, after the tension spring 9 is gripped by the spring stopper member 6 and the spring hook rod 8 as described above, the moving means 3 is raised by the elevating means 2 in the arrow A2 direction, Then, the support piece 4 is moved in the direction of the arrow A4 by the moving means 3, and the tension spring 9 is displaced so as to be located above the bracket 16 on the chassis 14.

In the above structure, when the spring 28 is in the natural state, that is, when the spring stopper member 6 is at the lower limit position as shown in FIG. 5, the free end of the spring hook 8 is spring-stopped as shown in FIG. It can abut the lower end of the member 6.

The spring pressing member 20 is fixed to the elevating plate 5, and thus is provided on the support piece 4 with its vertical displacement being prevented. The lower surface of this spring pushing member 20 is above the spring hook 8 in the natural state of the spring 28, as is apparent from FIG. Moreover, as shown in FIGS. 9 and 10 described later, when the spring stop member 6 is above the lower limit position relative to the support piece 4 and the spring 28 is compressed, the spring pushing member 20 of the spring push member 20 is compressed. The lower surface is below the lower end of the spring stop member 6 as is apparent from FIG.

FIG. 6 is a front view showing a state in which the tension spring 9 is engaged with the bracket 16 on the chassis 14. As described above, the engaging portion 37 of the tension spring 9 is inserted into and held by the spring hook rod 8. Lift plate 5 holding such a tension spring 9
By operating the elevating means 2 and the moving means 3 shown in FIG. 1, so that the engaging portion 35 of the tension spring 9 is moved to the bracket 16
It is displaced so as to be inserted into the engaging projection 39 of. Therefore, the maximum diameter D7 of the engagement protrusion 39 is formed smaller than the inner diameter D3 of the engagement portion 35.

7 and 8 are sectional views showing a state in which the engaging portion 35 extends the tension spring 9 held by the bracket 16.
With reference to FIGS. 1, 7, and 8, the elevating means 2 and the moving means 3 shown in FIG. 1 are used to move the spring hook rod 8 and the spring stop member 6 horizontally in the arrow A4 direction. Moving.
At this time, the tension spring 9 is expanded. While extending the tension spring 9, the free end of the spring stop member 6 contacts the upper end of the bracket 17, and the end portion of the spring stop member 6 in the arrow A4 direction is the end portion of the engagement protrusion 40 of the bracket 17 in the arrow A4 direction. Then, the mounting means is moved so as to be in the same vertical position.

9 is a front view showing a state in which the engaging portion 37 of the tension spring 9 is engaged with the bracket 17, and FIG. 10 is a plan view of a part of FIG. Referring to FIGS. 1, 2, 3, 9, and 10, the drive rod 31 is extended in the direction of arrow A6 after moving the mounting means as described above. Spring rod 8
Is separated from the engaging portion 37. Next, using the lifting means 2,
The moving means 3 is displaced downward. At this time, the elevating plate 5 also descends, so that the leg portions 20a, 20b of the spring pressing member 20 contact the engaging portion 37 of the tension spring 9 and press it downward. By this pressing operation, the engaging portion 37 is displaced downward,
When it reaches the vicinity of the engaging notch 19, it is fitted into the engaging notch 19 by the spring force of the tension spring 9. In this way, the tension spring 9 can be attached to the brackets 16 and 17 automatically and reliably.

As described above, according to the present invention, the mounting device includes the mounting means for mounting the end portion of the tension spring, and the moving means for moving the mounting means in the up and down first direction and the lateral second direction. It was composed including. With such a configuration, first, with the spring hook rod and the spring stop member included in the attachment means in contact with each other, the spring hook rod is inserted into the engaging end portion of the tension spring,
This grips the engaging end of the tension spring. Next, the other end of the tension spring is fixed so that it can be angularly displaced, and the attaching means is moved by the moving means to pull the tension spring. Next, the end of the tension spring is positioned at the position where the end of the tension spring is to be attached, and the spring hook rod is separated from the spring stop member by the driving means. Next, the mounting means is lowered.

At this time, the spring pushing member, which is provided on the spring hooking rod and thus the supporting piece while being relatively prevented from being displaced in the upper and lower first directions, moves downward relative to the spring stopper member, and The spring stop member is displaced upward relative to the support piece against the spring force of the spring that elastically biases the spring stop member downward. Therefore, the spring pressing member 20
The lower surface of the spring can drop further below the lower end of the spring stop member to press the end of the tension spring downward. In this way, the mounting operation can be performed with the tension spring being pulled. In this way, the tension spring can be attached automatically and reliably.

[Brief description of drawings]

FIG. 1 is a perspective view showing the construction of an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the construction of a mounting device 10, FIG. 3 is a perspective view of the vicinity of a spring pressing member 20, and FIG. FIG. 5 is a simplified plan view, FIG. 5 is a sectional view showing a structure relating to the support piece 4, FIG. 6 is a front view showing a state in which the tension spring 9 is engaged with the bracket 16, and FIG. 7 is a tension spring. 9 is a front view showing a state in which the tension spring 9 is extended, FIG. 8 is a front view showing a state in which the engagement portion 35 of the tension spring 9 is moved to the vicinity of the bracket 17, and FIG. 9 is a view showing the engagement portion 37 of the tension spring 9 in the bracket. FIG. 10 is a front view showing a state of being engaged with 17, and FIG. 10 is a simplified plan view of FIG. 2 ... Elevating means, 3 ... Moving means, 4 ... Supporting piece, 5 ...
… Elevating plate, 6 …… Spring stop member, 8 …… Spring hanging rod, 9
...... Tension spring, 10 …… Mounting device, 20 …… Spring pushing member, 28 …… Spring, 30 …… Cylinder, 31 …… Drive rod, 35,3
7 ... Engaging part, 38 ... Free end

Claims (1)

[Claims] 1. A mounting means for mounting an annular engaging end portion 37 of a tension spring 9 comprising a support piece 4, a support piece 4 which is provided in a first vertical direction A1, A2 and a second horizontal direction A6. A7
And a spring stop member 6 provided on the support piece 4 so as to be relatively displaceable in the first directions A1 and A2. , A spring 28 for elastically urging the spring stop member 6 downward, and an engaging end portion 37 of the tension spring 9 that can be inserted, extend in the second direction A6, A7, and are in the natural state of the spring 28. The spring hook 8 has a free end that can come into contact with and separate from the lower end of the spring stopper member 6.
And the spring hook 8 with respect to the spring stop member 6 in the second direction A
Means 30 and 31 for displacing abutting and deviating from A6 and A7, and a spring pressing member 20 provided on the support piece 4 while preventing vertical displacement, the lower surface of the spring pressing member 20 having a spring hook 8 The spring pushing member 20 which is above and below the lower end of the spring stop member 6 when the spring 28 is compressed, thereby pressing the engaging end portion 37 of the tension spring 9 downward on the lower surface. A device for mounting a tension spring, comprising: