JPS5822337B2 - Cover material forming equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for forming a cover material by wrapping a base material such as cardboard with a sheet material such as vinyl having a wider width and welding the peripheral edge of the covering material.

Conventionally, such a wrapping method involves manually turning the sheet material inward at the side edges and using a separate jig at the corners, as described in Japanese Patent Publication No. 45-1083. and pushed it inward.

Further, in this manner, the peripheral edge of the cover was pasted with an adhesive to form a cover material.

The purpose of the present invention is to simultaneously move not only the side edges of the sheet material but also the corner edges inwardly through the base material.
An object of the present invention is to provide an inverting device and a device to apply high-frequency heating to the inverting device.

Next, a preferred embodiment of the present invention will be described with reference to the drawings.
1 and 2 show the entire device in front and side views.

A press device 1 driven by pneumatic pressure is shown here, and from the top 11 is an air cylinder 12, a dolorado, 13
is the contact head, 14 is the limit switch, 15 is the horizontal plate, 1
6 is a vertical connecting rod made of an insulating material, 17 is a surface plate, 18 is a machine base, and 19 is a start switch.

The mold 3 is suspended and supported by a support plate 5.

The mold 3 is composed of four divided frame bodies 31 as will be described in detail later, and these are in an expanded state when not in operation, as shown in FIGS. 6, 8, and 9.

During operation, the drawing bundle 36 provided in the mold 3 swings at a constant angle, and the divided frame bodies 31 are squeezed to form a complete rectangular frame.

This state is shown in FIGS. 1 to 5, FIG. 7, and FIG. 10.

FIGS. 1 and 2 also show an air motor 71 mainly used for swinging the aperture bundle 36 and squeezing the divided frame body 31.
A diaphragm mechanism drive device 7 consisting of the following is shown.

This drive device 7 includes the aforementioned air motor 71 and its output shaft 7.
2. It consists of an L-shaped bar 73 connected at one end to this, and a sliding roller 74 attached to the other end surface.

The mold 3, the drawing mechanism and the support plate 5 provided therein are conductive and usually made of copper. As shown in FIGS. 5 to 10, an insulating plate 31' made of Bakelite or the like is attached by rivets to the outside or both sides of the lower end surface of the board 17, as shown in FIGS.

Further, a movable splint plate 32 that slides on the lower surface of the support plate 5 is soldered to be integrated with the divided frame body 31.

A rotary disk 35 is provided in the center of the support plate 5 extending from the upper surface to the lower surface and loosely fitted to the support plate 5, and one end of a pivot arm 34 is riveted to the circumferential edge thereof at equal intervals. It is fixed to the movable splint 32 at the end.

The movable splint plate 32 is integrally constructed with two ridge-shaped additional plates 32' running obliquely from both sides sandwiching the corner of the divided frame body 31,
A guide groove 37 is provided by removing a portion of the movable splint plate 32 that crosses both sides of the frame from within this additional plate 32'.

A fixed plate 33, which occupies approximately two-thirds of the guide groove 37 and supports the movable splint 32 by dovetailing, is fixed to the lower surface of the support plate 5 with screws.

The rotary disk 35 is fixed to one end of the aperture bundle 36 on the upper surface of the support plate 5, and as shown in FIG.
A sliding roller 74 provided on the lower end surface of the drawing bundle 36 engages in this groove 38 and is rotated to swing the drawing bundle 36.

Note that a cross-shaped electrode holder 51 is attached to the upper surface of the support board 5 via a connection holder 52, and these are also conductors and are usually made of copper.

This electrode holder 51 is connected to a vertical rod 16 made of an insulating material of the pressing device 1, so that the lifting force of the pressing device 1 is exerted on the support plate 5.

Further, this electrode holder 51 is connected to an electrode 91 of a high frequency circuit device incorporated in the press device 1, and on the other hand, a ground 92 is connected to the horizontal plate 15 of the press device 1.

Further, the support plate 5 is connected to the T.
- A spring 56 is stretched between the upper end of the down-pressing rod 54 and the upper surface of the support plate 5, and a presser plate 53 is horizontally supported between the lower ends of each presser rod 54.

Since the configuration of the present invention is as described above, first, a rectangular surrounding frame of a certain size is set on the surface plate 17 of the press device 1, and only the edge portion 2' of the cover 2 made of vinyl or the like is exposed outside the frame. The positioning work is completed by simply placing the cover in this manner and placing a base material 4, such as cardboard coated with a resin such as vinyl, on top of the cover in a size that matches the surrounding frame.

Next, when the start switch 19 at the end of the surface plate 17 is pressed, the press device 1 is driven by air pressure, and the support plate 5 is lowered to a certain low position as shown in FIG. , on the other hand, the limit switch 14 touches and presses the contacts 12.

Then, the air motor 7 is operated in conjunction with the limit switch 14.
1 is driven, and the squeezing action by the squeezing mechanism is started. During this squeezing process, there is a re-downstroke of the press, an energization process and a de-energization process to generate high-frequency heating by a high-frequency circuit device that is incorporated into the press device and works in conjunction with this. and cooling steps are each set by a timer.

FIG. 10 shows a state in which the press first enters the re-lowering stroke within the drawing stroke, and the spring 56 is stretched.

At the same time, the sliding roller 74 at the lower end of the L-shaped bar 73 slides into the guide groove 46 of the aperture bundle 36 due to the rotational force transmitted from the air motor 71 via the output shaft 72, and the aperture bundle 35 moves as shown in FIG. swing like.

Next, four pivot arms 34 fixed to the aperture bundle 36
is also rotated in the same way, and at the same time the split frame body 31 is fixed to this.
The movable splint 32, which is integrally welded with the splint, slides inside the guide groove 42, which is partially cut out, while engaging with the fixed plate 33, and the four divided frame bodies 31 are narrowed to form a complete rectangular frame. 5
Shape as shown.

During this time, due to the cooperation of the squeezing action and the re-lowering action of the press, the split frame body 31 reversely bends the protruding edge of the cover, press-bonds the bent portion, and then, due to the cooperation of the squeezing action and the energizing action, The folded portion of the cover is welded by high-frequency heating, and furthermore, due to the cooperation of the squeezing action and the cooling action, electricity is cut off while the mold remains squeezed, and the welded portion is cooled.

As shown in FIG. 10, the entire descending stroke and drawing stroke of the press are completed at this point, and immediately after that, the mold moves up while expanding with its divided frame and is suspended at a certain height.

At this time, beautiful partitions of the cover material can be seen on the surface plate 17, and the welded part becomes a very thin film, and a cover material is obtained that is free from twitching and tearing.

In this case, an insulating plate made of Bakelite or the like is attached to the outside or both sides of the lower end surface of the mold dividing frame depending on the width of the folded part of the cover.

For example, if the inside of the vagina is narrow, it will be attached only to the outside, and the frame part will become intensely heated to around 180℃, but the part directly in contact with Bakelite will be around 120℃, and the bent waist area will be around 100℃. Because the heat is distributed in indirect heat, residual heat, and gradually decreases, and welded at the same time, a beautiful cover material with no tearing or loss can be obtained.

In addition, if the width of the bent part is wide, Bakelite or the like is attached to the inside of the frame, so that the heat received at the lower end of the frame is still intense, but the heat is gradually distributed on the inside, causing the welded part to tear. prevent.

Furthermore, a thin insulating plate may also be attached directly below the lower end of the frame.

It is clear from the nature of the present invention that the cover used in the present invention is not limited to vinyl or other synthetic resin sheets, but may also include weldable non-woven fabrics.

Further, in the embodiment, a pneumatic drive device is used,
Although a control means such as a switch is added, it is understood that the gist of the present invention does not require such a drive device and control means as essential components.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a front view of the entire device of the present invention, FIG. 2 is a side view thereof, FIG. A front view of the support plate and the mold in a squeezed state supported by it, Figure 5 is a partially cutaway bottom view similar to Figure 4, and Figure 6 is the same as Figure 5 with the mold expanded. Figure 7 is an enlarged bottom view of the mold shown in Figure 5, especially a part of the split frame, and Figure 8 is an enlarged bottom view of the mold shown in Figure 5, and Figure 8 is a press machine that lowers the support plate to a certain low level after positioning the charging material on the press surface plate. 9 is an explanatory diagram of the state in which the support plate is lowered again by the press device during the drawing stroke, FIG. 10 is an explanatory diagram of the state under welding and cooling action upon completion of the drawing stroke, and FIG.
The figure is a sectional view taken along line XI-XI in FIG. 6. 1 is a press device, 2 is a cover made of vinyl or the like, 2' is the edge thereof, 3 is a mold, 4 is a base material such as cardboard, 5 is a support plate, 7 is a drawing mechanism drive device, 11 is an air cylinder, 14
17 is a limit switch, 17 is a press surface plate, 19 is a start switch, 31 is a divided frame body, 36 is an aperture bundle, 5
1 is a cross-shaped electrode holder, 71 is an air motor, 91 is an electrode, and 92 is a ground.

Claims (1)

[Claims] 1. In an apparatus for forming a cover material in which a base material 4 such as cardboard is covered with a sheet material 2 such as vinyl at its peripheral edge, a surface plate 17 provided with a concave portion smaller in size than the sheet material 2; A support plate 5; a frame formed of four L-shaped divided frame portions 31 fixed to the inner surface thereof so as to slide in the radial direction; a rotating disk 35 loosely fitted in the center of the support plate 5;
The bundle 36 is composed of a rotating disk 35 and a bundle 36 fixed on the outer surface of the support plate 5;
A cover material forming apparatus characterized in that the L-shaped divided frame part 31 closes to form one frame shape by rotation of the cover material, and high-frequency heating is applied to the frame shape.