JPS5924699B2 - Method and device for helical folding of band materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for folding the edge of a material when making bands such as handbags and shoulder bags such as bags, bags, etc.

Generally, the above-mentioned bands are made by folding the hem of one of the materials.
The other material is glued or sewn onto it.

However, for example, as seen in the band of a school bag, in the past the planar shape was made with the same width for each part, but recently the width has changed depending on the function of each part, and the addition has a curved shape. The task of folding paper has become extremely troublesome and requires a lot of work. An object of the present invention is to provide a method and a device that can overcome the above-mentioned conventional inconveniences.

Materials used for the above-mentioned bands include synthetic resin leather, cloth, leather, and other materials that are easy to bend and materials that are difficult to bend. The configuration is as follows. That is, the cut material is placed on a hard collecting inner plate having a ridge that is equal to the planar shape of the band to be made, with the bending allowance portion of the cut material extending evenly from the side green of the collecting inner plate. It is fixed with a removable adhesive, and this adhesive is moved straight, and in the process of moving straight, both edges of the collecting inner plate are attached to a body part that can be compressed from a direction perpendicular to the direction of straight movement, and a body that can be compressed from a vertical direction. It passes between a pair of forcibly rotated flanged rollers having a flange, thereby bending the bending allowance portion inward from both edges of the collection inner plate, and rotating the folded portion by forcible finger rotation of the flange. Pressure is applied while applying frictional heat, and then the edge-folded cut material is peeled off from the inner plate. As the removable adhesive, those commercially available from Sumitomo 3M Ltd. as spray glue for sewing can be used.

The present invention not only makes it possible to fix the cutting material and the copying guide plate extremely easily and reliably by using such a removable adhesive, but also allows it to be peeled off cleanly afterwards and there is no stickiness on the peeled surface, so it can be used for edge folding. The preparation work can be done very easily by anyone without much effort, and it is extremely convenient in that once a single copying guide board is made, it can be used repeatedly immediately. Additionally, edge folding is performed by passing the cut material and the adhesive on the copying guide plate between a pair of forcibly rotating flanged rollers as described above, and the body of the flanged roller is used as a copying guide. Since both edges of the plate can be pressed from the lateral direction, even if the edges are curved, it is possible to follow the curve well and press, and the flange of the flanged roller can be pressed in the vertical direction. Therefore, even if the thickness of the bent portion changes due to wrinkles during bending of the curved portion, the pressure can be tightened to closely follow this change in thickness.

Furthermore, the folded portion is compressed while applying frictional heat due to the forced sliding rotation of the flange, so even if the cut material is difficult to bend, the frictional heat will make it highly flexible. In this way, hem folding is possible regardless of the material of the material. The apparatus for carrying out the method of the present invention described above will be described below with reference to embodiments shown in the accompanying drawings.

In the perspective view shown in FIG. 1, a through hole 2 is bored approximately in the center of a horizontal base plate 1, and linear guide grooves 3, 3' are provided straight in the base plate portions before and after the through hole 2.

On the front and back sides of the through hole 2, there are both side plates 4 that hold the base plate 1.
, 4' are used to rotatably support the lower rollers 5, 5/ of the forced feeding/feeding roller pair, as shown in FIG. Guide grooves 6, 6/ are formed in the center circumferential direction of each lower roller 5, 5', and are aligned with the guide grooves 3, 3/ of the base plate 1 described above, and are aligned with the top of each roller. The upper surface of the base plate 1 is arranged in substantially the same plane. Between the two lower rollers 5, 5' are two upper and lower guide rods 8, 8, which have two sliding members 7, 7' attached to the side plates 4, 4', which are movable parallel to the roller axis direction. The upper roller 11 of the pair of rollers is slidably inserted into the upper roller 11 of the pair of rollers. , 11/ are arranged above the lower rollers 5, 51.

In the illustrated example, the upper rollers 11, 111 are rotatably supported on movable frames 10, 10' which are movable only in the vertical direction, and the upper rollers 11, 111 are supported rotatably between the movable frames 10, 104 and the side plates 4, 4'. The springs 13, 13 are placed between the fixed members 12, 12'
' is interposed and the upper roller 1 is moved by the action of the springs 13, 13/.
1, 1V to the lower rollers 5, 5', outward projecting portions 15, 15' are provided at the ends of the pads 14, 14' of the movable frames 10, 10' that pass through the fixed members 12, 1γ. A cam lever 16, 16' is rotatably connected to the fixed member 12, 12', and is capable of lifting the outwardly projecting portion 15, 15' and holding it in that state.
(As shown in this figure, the upper rollers 11, 11' can be held in the lifted state. The two sliding members 7, 7/ are fixed to the stops 17, 171 attached to the front end surfaces thereof. The connecting strings 18, 18' are guided to pulleys 19, 19' provided on the outside of the side plates 4, 4', and weights 20, 20' are attached to the connecting strings 18, 18/ends, and a constant tension is always directed inward. receives force (see Figure 3).

The two sliding members 7, 7' have guide pieces 21, 21',
22, 22' are installed, and a flanged roller 23,
Attach 23'. The front guide pieces 21, 21' have a flat half-funnel shape, and as described later, the copying guide plate 4
The function is to bend the bending allowance portion 44 of the cut material 43 protruding from the edge 42 of the cut material 43 inward. Flange portions 23a, 23a' are provided at the upper ends of the roller bodies 23b, 23b7.
Shafts 24, 24' of flanged rollers 23, 23' formed with
Attach the timing belt pulleys 25 and 25' to the bolts, as well as the compression springs 26 and 26' and adjustment nuts 27 and 27.
′ always suppresses it downward. Roller pair 5, 11
, 5', 117 and the flanged rollers 23, 23', a pulley 30 driven by an appropriate means is attached to the shaft end of the lower roller 5 (see Fig. 1), and a roller on the opposite side is attached to the shaft end of the lower roller 5. Pair 5, 11, one timing belt -
9, 9', the chain 37 is endlessly wound around the chain wheels 31, 32, 34, 35, 36 and the idling wheel 33 attached to the shaft ends of the roller pairs 5', 11' (see Fig. 2), and As shown in FIG. 3, the timing belt 38 is arranged between the timing belt pulleys 9 and 25 and between the timing belt pulleys 9' and 257 so that the rotation direction of the flanged rollers 23 and 23' is from inside to outside. ,38
′ is wrapped around it.

In addition, in FIG. 2, 28 and 29 are springs and arms for the idling wheel 33. When using the above-mentioned device, as shown in FIG.
A copying guide plate 40 is prepared, which is a hard plate made of synthetic resin or the like with a ridge formed on the back side, and is cut symmetrically into the planar shape of the desired product around the protrusion 41, and the bending allowance portion of the cut material 43 is prepared. 44 are evenly extended from the edge 42 of the copying guide plate 40, and are adhered to the surface of the copying guide plate 40 using a sewing spray glue that can be peeled off later. 41 is fitted between the pair of rollers 5 and 11.

In this way, the adhesive starts to move straight, but soon the bending allowance portion 44 comes into contact with the guide pieces 21, 21', and while the bending allowance portion 44 is bent inward by the guide pieces 21, 21', Since the sliding members 7, 7' to which the guide pieces 21, 2V are attached are always attracted by the action of the weights 20, 20', the guide pieces 21, 21' follow the change in the shape of the bending allowance 44. A pressing force is applied while changing the facing distance between the two.

At the same time, the spacing between the flanged rollers 23, 23', which are other members attached to the sliding members 7, 71, will also be changed, and the flanged rollers 23, 23' will be forced to rotate, and the compression springs 26, 23' will be forced to rotate. 26', the portions bent in advance by the guide pieces 21, 2V will not hold the roller bodies 23b, 23b' or the flanges 23a, 23a' when passing between the flanged rollers 23, 23'. Since the material is pressed while being heated by the frictional heat generated by the forced sliding contact, the creases are formed even more strongly. The adhesive material subjected to such a bending process is finally passed through the roller pair 5', 11'.
It is sent out at a constant speed from between. The sent-out adhesive material then peels off the edge-folded cut material 43 from the copying guide plate 40. According to the apparatus of the present invention described above, the convex strip 41 of the copying guide plate 40 is formed by the guide groove 3 of the base plate 1, the circumferential grooves 6, 6' of the lower rollers 5, 5' for forced feeding, and the base plate 1. Board 1
The bonded material of the copying guide plate 40 and the cut material 43 can be positively moved straight by being fitted into the guide groove 3' of the paper guide plate 40 one after another.

Between the pair of forced feed and feed rollers are two sliding members 7, 7' which are slidable left and right and are pulled inwardly by the action of weights 20, 20'.
The sliding members 7 and 7' are each equipped with flanged rollers 23 and 231 which are forced to rotate horizontally from the inside to the outside and can be pressed downward at all times. The portions 23b and 23b' are closely aligned with the copying guide plate 4.
It is possible to expand and contract following the edge 42 of 0, and bend the bending allowance portion 44 protruding from the edge 42 inward.
The flanges 23a, 23a' move up and down in accordance with the thickness of the bent portion, and can be pressed while applying frictional heat due to forced sliding rotation. Finally, even stronger clamping is performed by the pair of forced feed rollers 5' and 11', thereby achieving reliable helical folding.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the device of the present invention, Fig. 2 is a longitudinal sectional view, Fig. 3 is a perspective view of the sliding member seen from the rear, and Fig. 4 is a perspective view showing the copying guide plate and the cutting material. be. 1... Base plate, 2... Through hole, 5, 11 and 5', 1V... Roller pair, 3, 3/ and 6, 6t... Guide groove, 7, 7ζ... Sliding member, 20, 20t... Weight, 23, 23t...
・Roller with flange, 40 ・・Copying guide plate, 41 ・
...Convex ridge, 42...Edge, 43...
...Cut material, 44...Bending allowance.

Claims (1)

[Scope of Claims] 1. A hard copying guide plate having an edge that is equal to the planar shape of the band to be tailored, and the bending allowance portion of the cut material being evenly extended from the edge of the copying guide plate. In this state, the cut material is fixed with a releasable adhesive, and the adhesive is moved straight, and during the straight movement, both edges of the copying guide plate are pressed against the body and vertically. It passes between a pair of forcibly rotated flanged rollers that have a flanged portion that can be pressed from any direction, thereby bending the bending allowance portion inward from both edges of the copying guide plate, and applying a flanged portion to the bent portion. A method for hem folding bands, which is characterized by applying pressure while applying frictional heat due to forced sliding contact rotation of the parts, and then peeling the hem folded cut material from a copying guide plate. 2. Pairs of forced feeding rollers 5 and 11, two sliding members 7 and 7' that can slide left and right, and a pair of forced feeding rollers on the front, middle, and back sides of the through hole 2 formed in the base plate 1, respectively. 5' and 11' are arranged, and the cut material 4 is disposed in the circumferential direction of the upper surface of the base plate 1 and the lower rollers 5 and 5' of the above two roller pairs.
The guide grooves 3, 3', 6, and 6' are formed in a straight line to fit with the convex strips 41 protruding from the lower surface of the copying guide plate 40 to which the sliders 7 and 7' are attached. They are pulled inward by the action of weights 20 and 20', and are each equipped with flanged rollers 23 and 23' that are forcibly rotated horizontally from the inside to the outside and can be pressed downward at all times. A helical folding device for band materials.