JPH0120109Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device for folding the material of an envelope-shaped jacket used in a magnetic cartridge into two.

[Prior Art and its Problems] In recent years, magnetic cartridges have been put into practical use, in which various signals such as audio signals, video signals, and data signals are recorded on magnetic disks and stored in an envelope-shaped jacket. This magnetic cartridge is inserted into a computer's floppy disk device with the magnetic disk housed in its jacket, and records are reproduced by rotating the magnetic disk and bringing a reproducing head into contact with its track. Such a magnetic cartridge will be described with reference to FIG.

The magnetic cartridge 1 consists of a magnetic disk 2 and a jacket 5 that houses the magnetic disk 2. The magnetic disk 2 is made of a suitably flexible film such as polyester resin, which is cut into a circular shape with a predetermined size, and a large one is placed in the center. Various signals are recorded on a track 4 formed by drilling an engaging hole 3 and coating both surfaces with a magnetic layer. The jacket 5 is made of a thermoplastic resin such as vinyl chloride in the shape of an almost square envelope, with a round hole 6 larger than the magnetic disk engagement hole 3 cut out in the center, and a playback starting point placed above and below this. Open the detection hole 7 and the slot 8 for abutting the playback head.
Paste paper 9 for writing on the top corner.

The jacket 5 is made from a rectangular sheet shown in FIG. 2, and is made by folding this jacket material 10 into two. The jacket material 10 has a nonwoven fabric liner 11 on almost the entire surface of one side, which is the inner surface of the jacket.
A round hole 6, a detection hole 7, and a slot 8 are formed in each predetermined position of the right half 12 and left half 13, and narrow flaps 14, 15, and 16 are formed on three sides of the left half 13. establish. This jacket material is fed into a jacket forming device, bent into two along the center line 17, and heated to form the bent portion into a U-shape.Then, the flaps 14 and 15 on both sides are fused to form a certain gap. An envelope-shaped jacket 5 is made, the magnetic disk 2 is inserted into this jacket, and the flap 16 is fused to complete the production of the magnetic cartridge 1. Note that after the jacket 5 is made, a round hole 6, a detection hole 7, and a slot 8 may be punched out on both sides of the jacket.

Since this magnetic cartridge is loaded into the floppy disk device of a computer with the magnetic disk 2 housed in the jacket 5, dust does not adhere to the magnetic layer of the magnetic disk, and the magnetic layer is always attached to the liner 11 as it rotates. This has the advantage that it can be easily cleaned by twisting, but on the other hand, it requires high precision in the outer shape and dimensions of the jacket.

[Means for solving problems]

The tip of the core plate that moves toward and away from the table of the jacket forming device protrudes from the front edge of the table,
A bending bar is installed at the tip of the core plate with a distance between them, and a spring that applies rotational force to the bending bar and a collar that holds the bending bar in a horizontal position are attached to the pivot shaft that supports the boss. The chain ring is fixed to both ends of a long lower shaft provided below the front edge of the table, the bosses of the two arms are loosely fitted, and the boss of the support rod to which the heating bar is attached is attached to the same lower shaft. Fix the chain ring to the short upper shaft that loosely fits into the bearing at the upper end of the arm, hang a chain between it and the chain ring on the lower shaft, and fold it into the continuous piece fixed to the inner end of the upper shaft. The pivots of the bending bar are connected to each other, and means for moving the arm and support rod forward and backward, and means for swinging the lower shaft are provided, and the swinging of the lower shaft swings the arm and moves the bending bar to the pivot point through a chain. The jacket material is rotated around , and the jacket material held between the table and the core plate is squeezed and bent 180 degrees along the core plate.

〔Example〕

The present invention will be explained below based on the embodiments shown in FIG. 3 and below.

In the figure, reference numeral 20 denotes a table of the jacket forming apparatus, the tip of the core plate 21 protrudes slightly from the front edge of the table, the jacket material 10 with the liner pasted thereon is fed onto the table, and the left half 13 of the jacket material is inserted into the core. Hold with plate 21. Reference numeral 22 designates a bending bar in the form of a band plate. Three bosses 23 provided at both ends and the center are loosely fitted onto a pivot 24, and springs 25, 2 are wound around the pivot.
5 is inserted into one collar 26, and the other end of the spring applies a counterclockwise rotational force to the bending bar 22. The collar 26 has slopes 27 and 28 on the left and right sides of its upper edge, and the bending bar 22 is allowed a slight angular escape by the slope 27 on one side, and is maintained in a horizontal position by the slope 28 on the other side. 30 is a heating bar, and core plate 2
Approach the protruding end of 1.

Reference numerals 31 and 31 denote two bearings separated by a slight interval, which are attached to the frame F located below the front edge of the table 10. A long lower shaft 32 is inserted into these bearings so as to be rotatable, and the lower shaft chain rings 33, 33 at both ends of
is fixed, and the bosses of the arms 34, 34 are loosely fitted. The two arms 34, 34 are joined together by a stay 35, and a protrusion 3 protrudes from the boss of one arm.
6 is connected to a link 37, and a link 39 is connected to a protrusion of a cylindrical metal 38 fixed to the lower shaft 32 adjacent to the boss of the other arm. 40 is the arm 34, 34
A support rod located in the middle of the
A cylindrical boss 4 is attached to the central part of the
1 is loosely fitted onto the lower shaft 32, and a link 42 is connected to the protrusion extending from this boss. 43, 43 is arm 3
A chain ring 45 and a connecting piece 47 are respectively fixed to the outer and inner ends of a short upper shaft 44 that is loosely fitted into the bearings provided at the upper ends of the bearings 4 and 34. Chains 46, 46 are hung on the chain rings 33, 33, and the continuous joint pieces 47, 47 are directed downward and forward to the pivot 2.
Connect both ends of 4. In addition, in FIG. 4, the continuous joint pieces 47, 47 are raised to make the drawing easier to understand.

Initially, the bending bar 22 and the heating bar 30 are at the solid line position shown in FIG. , first link 3
7 to make the arms 34, 34 upright, and
As shown in the figure, the bending bar 22 is brought close to the table 20, the edge B of the upper front corner is inserted under the protruding end of the core plate 21, and the center of the jacket material 10 is moved by the turning force of the bending bar. is brought into pressure contact with the protrusion of the core plate 21. Next, the link 39 is pulled down to rotate the lower shaft 32 counterclockwise, and the upper shafts 44, 44 are rotated by the two sets of chains 33 and 45 and the chain 46. As a result, the continuous joint piece 47 fixed to the upper shaft,
47 rotates counterclockwise and rises from a position facing forward and downward, and assumes a position facing rearward and upward as shown by chain line 47'' in FIG. It moves along an arcuate path A centered on the upper shaft 44 shown in the figure. When the pivot 24 moves along the arcuate path A, the bending bar 22 moves back a little, then rises and bends the jacket material 10 while squeezing it. Then, the bending bar reverses and bends the jacket material by 180 degrees.Before this bending angle reaches 180 degrees, the link 42 is pulled down to raise the support rod 40 of the heating bar, and the heating bar 30 is folded into the jacket. Material 10
Place it on the bent part of and form it into a U-shape. Thereafter, the links 42, 39, and 37 are raised to return the bending bar 22 and heating bar 30 to their initial positions.

In the above embodiment, the chain rings 33, 45 and the chain 4
6 may be replaced with a gear and a timing belt, and a link 37 for advancing and retracting the arm 34 and the support rod 40,
42 and the link 39 for swinging the lower shaft 32, known advancing/retreating means and swinging means can be used.

[Effect of idea]

The device of the present invention has a bending bar that protrudes the tip of the core plate that comes into contact with and leaves the table of the jacket forming device from the front edge of the table, and bends the jacket material 180 degrees along the core plate while squeezing the jacket material. A spring that applies rotational force to the bending bar and a collar that holds the bending bar in a horizontal position are installed on the pivot shaft that supports this boss, and a long lower shaft provided below the front edge of the table is attached to both ends of the spring. Fix the chain ring and loosely fit the bosses of the two arms, loosely fit the boss of the support rod with the heating bar attached to the same lower shaft, and attach the chain ring to the short upper shaft that loosely fits into the bearing at the upper end of the arm. is fixed, a chain is hung between it and the chain ring on the lower shaft, and the pivot of the bending bar is connected to a continuous piece fixed to the inner end of the upper shaft, and the means for moving the arm and the support rod back and forth, and the lower shaft are fixed. Since it is equipped with a means for swinging the shaft, the bending bar can bend the jacket material 180 degrees while squeezing the center part, and the heating bar can be applied to the bent part before the bending angle of the jacket material reaches 180 degrees. This has the effect of being able to smoothly perform the following with a simple configuration.

In addition, there is no slack, distortion, waving, bulging, etc. of the bent part that was seen in the conventional method, and the bent part can be formed into an accurate U-shape by applying the heating bar quickly and heating it while squeezing. In addition, a jacket with high dimensional accuracy can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front view of the magnetic cartridge, Figure 2 is a front view of the jacket material, Figure 3 is a diagram of the operation progress,
FIG. 4 is a front view, FIG. 5 is a sectional view taken along the line CC in FIG. 4, and FIG. 6 is an enlarged sectional view showing the operation of the bending bar. In addition, 10 is a jacket material, 20 is a table, 21 is a core board, 22 is a bending bar, 23 is its boss, 24 is a pivot, 25 is a spring, 26 is a collar, 30 is a heating bar, 32 is a lower shaft, 33 is a chain ring,
34 is an arm, 37 is a means for advancing and retracting the arm, 38 and 39 are swinging means for the lower shaft, 40 is a support rod, 41 is its boss, 42 is a means for advancing and retracting the support rod, 43 is a bearing,
44 is an upper shaft, 45 is a chain ring, 46 is a chain, and 47 is a relay piece.

Claims (1)

[Scope of utility model registration request] The tip of the core plate that moves toward and away from the table of the jacket forming device protrudes from the front edge of the table,
A bending bar is installed at the tip of the core plate with a distance between them, and a spring that applies rotational force to the bending bar and a collar that holds the bending bar in a horizontal position are attached to the pivot shaft that supports the boss. The chain ring is fixed to both ends of a long lower shaft provided below the front edge of the table, the bosses of the two arms are loosely fitted, and the boss of the support rod to which the heating bar is attached is attached to the same lower shaft. Fix the chain ring to the short upper shaft that loosely fits into the bearing at the upper end of the arm, hang a chain between it and the chain ring on the lower shaft, and fold it into the continuous piece fixed to the inner end of the upper shaft. A means for connecting the pivots of the bending bar and moving the arm and support rod forward and backward, and a means for swinging the lower shaft are provided, and the swinging of the lower shaft swings the arm and moves the bending bar to the pivot point through a chain. A jacket material bending device, which rotates around the table and bends the jacket material held by the table and the core plate by 180° along the core plate while squeezing the jacket material.