JPS5937131B2 - metal web stretching machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a stretching machine that forms open net stretched materials from a web that has been previously cut into strips by a rotary slitting machine and provides them with a row of parallel discontinuous slit lines.

In particular, this machine, which is also used for the production of other types of wrought material,
It is used to produce expanded aluminum mesh as described in No. 7. Conventional rotary slit web spreading machines include a pair of spreading arms having vertically and horizontally divergent edges through which the slit web is passed, and the web fits laterally into the diverging edges. It was spread between the sections and the slits in the web were widened to form a diamond-shaped net.

However, this conventional machine has many drawbacks, which are overcome by the present invention. This will be explained in detail below. According to a first feature of the invention, the extension arm of the extension machine is attached to a sub-frame by an adjustable connecting member to increase or decrease the angle between the edges of the arms, said sub-frame being capable of other adjustment. The sub-frame is attached to the main frame by a connecting member, and the sub-frame is tilted about a pivot line extending vertically in the direction in which the web is fed along the arm.

As a result, the angle between the spreading arms can be adjusted to various inclination angles as necessary to obtain a spreading net having a desired net shape, while the main frame of the machine can be tilted to one side or the other as appropriate. The stretched output web from the machine can thus be fed in a horizontal plane. For the purpose described in the above-mentioned patent, the rolled product is laid down in successive layers to form a metal mesh package, and this operation involves rolling the product and folding it or stacking separate sheets cut from the web. However, this can be carried out very conveniently by feeding the web in a horizontal plane. Furthermore, when the output web of the stretched product is tilted,
It may be pulled to one side or deformed by its own weight, resulting in poor packaging shape and highly uneven density. Directly horizontally feeding the stretched web from the stretching machine eliminates the need for guidance to restore the web to horizontality, which is especially true when thin metal foils are used and the stretched web is relatively weak. This is important when it is easily damaged and deformed. As much as possible
The tilting axis of the machine's sub-frame extends centrally away from the web feed on the spreading arm, so that the running line of the spread material does not move when the sub-frame axis is tilted. According to another feature of the invention, there is provided a spreading machine having a gripper for holding and conveying the edge of the web along its spreading arms as it travels;
These grippers consist of a driven endless belt having a longitudinal groove and a driven endless blade member parallel to the longitudinal groove and pressing the edge against the longitudinal groove, the web edge being in said groove between the belt and the blade member. I get grabbed.

These gripping devices efficiently and reliably hold the edges of the web and are particularly useful for thin foils such as those described in the aforementioned patents having a thickness of 5 to 12 inches (0.127 to 0.30411). This is useful when stretching metal webs. In conventional spreading machines, the edges of the web are typically held by a set of driven gripping rollers located along the length of the spreading arms; There is a gap between them, and the foil grips poorly at non-supporting points.
The thin foil edges cannot be properly supported and retained as deformation and damage occurs. According to the configuration of the present invention, the foil can be supported reliably and uniformly throughout its entire travel. According to yet another feature of the invention, the stretching machine has a support structure rotatably mounted to the coiled slit metal web material, the guide member directing the coiled support structure and the slit web directly to the arm. It is located between the extended arm.

When drawing thin metal foils, all speeds of the drawing machine are necessarily limited because the relatively weak foil cannot withstand the stresses that occur during high speed operation. However, foils can be slit at fairly high speeds, typically the speed at which foils can be slit is about three times the maximum stretching speed. Therefore, after slitting the foil, it is preferable to wind the foil into a slit coil material, and to send the coil material produced by a small number of slitting machines to a large number of stretching machines, thereby increasing the overall production volume. Preferably, the guide member for the web sent to the extended arm is a smooth rod non-rotatably supported between the coil support structure and the extended arm, the web fitting into the rod, and the rod following the extended arm. It is inclined non-perpendicularly to the direction of web feed. Preferably, the axis of the rod is parallel to or aligned with the entire surface of the web in the area approaching the extension arm.

According to this web feed guide configuration, when the spreading arm is arranged so that its wide angle is adjusted and the whole is tilted to maintain the output spreading web horizontally, when the spreading arm is tilted. There is no need to tilt the input slit web. Furthermore, if the spreading machine is fed from a coiled slit metal web, there is no need to move the heavy coil material up and down against gravity as the spreading arm is tilted. According to another feature of the invention, there is provided a stretching machine having extension arms as members each removably fixed to a support arm, which support arms can be moved laterally toward or away from each other. It is connected to the machine frame by an adjusting device.

This allows the machine to be adjusted to accommodate input webs of different widths. An alternate set of extension arm members can be used in the machine to better support the web material at the entry end of the extension arms when adjusting the spacing between the support arms. With this configuration, the metal web is conveyed along the extending arm using an endless belt that grips and contacts the edge of the web. When a new set of spreader arms is substituted for the machine, the length adjustment of the belt gripping surface necessary to ensure that the web is released after the desired spread is made by the pulleys on which the belt hangs. This can be easily done by adjusting the position of the belt or by replacing it with a belt of different length as necessary.
It is conveniently driven by laterally extending drive shafts, which drive shafts can be arranged to be laterally adjusted together with the support arm of the extension arm. This greatly simplifies the adjustment procedure for installing a machine that accepts webs of different widths. According to one embodiment, particularly applied to wrought materials of different widths, when the web is passed upwardly through the machine, the surface of each wrought arm that fits extends at least from the back of the arm to the front. The web is extended and has a smooth surface in an area over the main part of its length, and furthermore, the web has a smooth surface on the extended arm and a driven belt running along the extended arm and pressed against the smooth surface. It is conveyed while being grasped by each edge in between. This gripping arrangement efficiently and reliably holds the edges of the web, and is particularly suitable for webs with thicknesses of 5 to 12 thousandths of an inch (.
．． It is useful for stretching thin foil metal webs such as 304m11) foils. Furthermore, the belt can accept metal webs of different widths. Embodiments of a stretching machine embodying various features of the present invention will now be described in detail with reference to the accompanying drawings.

The same reference numerals indicate the same parts in each drawing.

This machine has a main frame 20 and a sub-frame 21 that rotates on the main frame about a horizontal axis 22. At one end, the main frame 20 supports an upright member 23, where the horizontal axis 24 of the secondary frame bears a bearing 26.
Rotate freely inside. At this end, the subframe 21 is formed with a plate 27 to which the shaft 24 is connected. On the opposite side of the secondary frame are a pair of vertically spaced horizontal tension bars 29.
a generally D-shaped mounting portion 2 connected to the end plate 27 by
8 (also shown in FIG. 7).

The mounting portion 28 of the sub-frame is attached to the main frame 2 by fixing bolts 32.
The mounting portion 28 is supported on one side of the vertical extension 31 of the
is tightened to the protrusion 33' of the extension part 31.

The fixing bolt 32 is inserted into an arcuate slot 34 in the projection 33. The mounting portion 28 has an arcuate protruding key 36 at its lower end.
The key slides within a curved key groove channel 37 fixed to the main frame 20.

The center of curvature of the key groove channel 37 and the groove hole 34 is axis 2
4, the sub frame 21 can rotate around this axis. In order to tilt the sub-frame about this horizontal axis, a handle wheel 38 is provided on a threaded shaft 39 which is connected to the mounting part 28 via a pivot joint 42.
and a threaded sleeve coupled to the threaded sleeve.

The holder of coiled slit metal material has a side plate 43 and front and rear tension bars 44, 46, the front tension bar 44 having its end sliding in a bearing 47 on the main frame 20.

The rear bar 46 has a key block 48 which slides in a horizontal channel guide groove 49 connected to the main frame 20, so that the entire holder can be moved from side to side. The block 51 is connected to the side plate 43 and supports a bearing 52, through which a shaft 53 is inserted and a coil material is wound around the shaft. The hinge portion 54 of the block 51 is releasably held in place by a set screw 56, and when new coil material is placed in the retainer, the shaft 54
from the machine. To keep the feed of the slit web material 58 properly aligned, a pair of edge detectors 59 are mounted on the main frame 20 adjacent the feed of the web.

These control the operation of the hydraulic cylinder 60 connected between the main frame 20 and one side plate 43 of the holder, and
By laterally moving the holder in response to a signal from the edge detector 59, the slit web 58 is moved into the sub-frame 21.
is aligned with the horizontal axis of A brake is provided on the shaft 53 of the coil material holder to keep the web tensioned and to prevent it from being over-fed. A friction band 67 is applied to the brake drum 66 on the side plate 43, and one end is fixed to the side plate 43. A weight 68 is supported on the other end of the band 67 and the band is attached to the drum 6.
6 and is maintained in frictional engagement. The drum 66 is connected to the shaft 53 via a shaft 64, a gear 63, and an upper gear 62. The side plate 43 also carries a post 69 supporting a roller 71 on which a web extends towards the subframe 21 .

The coil material holder used is of a type that can be separated as a separate unit from the rest of the machine.

This facilitates the changeover procedure when replacing the coil material with new one, and also allows the coil material holder to be used to wind up the slit foil sent from the metal slitting machine. In FIG. 1, the main frame 20 is divided into two separable halves 20a and 20b along a seam 72.
A latch 73 releasably holds the frame sections together. From the holder, the web 58 passes under a white roller 74, one end of which rests on a bearing 76 in the end plate 27 and the other end an extension of the D-shaped mounting portion 28. The web 58 then passes through a smooth circular cross-section bar 77 which is non-rotatably fixed to an end support member 78 connected to the drawbar 29 . The axis of this rod 77 is parallel to the plane of the web in a region 79 where the web then reaches a pair of diverging extension arms 81,82. The upper surface of the rod 77 is aligned with the rear end edges of the arms 81, 82, and its axis is inclined with respect to the direction of web travel along the extension arms 81, 82, so that the web can be moved from the coil material holder to its initial position. It is arranged to redirect it from the lateral feed direction to the arms 81 and 82. Coil material holder and extension arm 81,
In the example in which the rods 82 and 82 are arranged perpendicularly to each other, the axis of the rod 77 is inclined at 45 degrees with respect to the final direction of travel along the arms 81 and 82. It has been found that when rollers are used instead of the non-rotatable rod 77, the web tends to creep upwardly along the rollers, causing the web to be unwound.

In the embodiment shown in FIGS. 1-10, the mounting portion 28 has a pair of spaced apart parallel outer plates 83 connected by transverse braces 84.

A pair of housings 86 are connected to the inside of the side plate 83, and these housings support driven rubber-faced rollers 87 that draw the web 58 through the engagement portion. In front of the roller 87, a shaft 88 extending in the upper and lower horizontal directions is connected to extend between the outer plates 83.

As shown in FIGS. 4, 9 and 10, these axes 8
8 slidably supports a pair of inner plates 89, and a shaft 88 is inserted through bushings 91 of these inner plates 89. These plates have set screws 9 that engage flats 93 on the surface of the shaft 88.
2 at predetermined intervals. These slidable inner plates 89 support the extension arms 81 and 82 so that the lateral distance between the extension arms can be adjusted.

To control this adjustment, a bolt 94 is provided that extends inwardly from the outer plate 83 and has an end 95 connected to the inner plate 89.
It is screwed inside. The outer end of the bolt 94 is held so as not to move in the axial direction within the outer panel 83 by a collar 96 that is fixed to the bolt 94 and engages with the outer panel 83. A support arm 101 supporting the extension arms 81 and 82 is pivotally mounted inside the inner plate 89.

As shown in FIGS. 4 and 9, the bolts 102 pass through each side plate 89 and the outer wall of the support arm 101. As shown in FIGS. A nut 103 is supported on the outer end of the bolt 102, and each bolt 102
The inner end supports a disk 104 which is fixed to the outer wall of the support arm 101 via a pin 106 passing through the outer wall of the arm 101 . When nut 103 is loosened, support arm 1
01 tilts up and down about the axis of the bolt 102 together with the extension arms 81 and 82. In front of the bolts 102 each inner plate 89 has an arcuate slot 107 through which the support arm is further secured to the inner plate 8 by means of a tensioning bolt 108.
Connected to 9.

This bolt 108 must be loosened before the support arm 101 and extension arms 81, 82 can be adjusted in rotation. Groove 107
A scale line is provided along the arm 81 or 82 to indicate the angle of the arm 81 or 82. As shown in FIGS. 5 and 9, the extension arms 81 and 82 are attached to the support strip 10 along the outer edge, for example by welding.
9 and these strips 109 are fixed by bolts 110 to strips 111 bolted to the outside of the support arm 101. The extension arm 82 is a generally triangular flat plate, with edge flanges 11 facing each other along the wide inner edge.
It has 2,113.

The rear edges of the extended arms 81 and 82 overlap in parallel and are slightly stepped. The plane of the web 58 and the extended arms 81 and 82
For the area approaching, the left arm 81 slopes upward in the longitudinal running direction of the web, while the right arm slopes downward. The extension arms 81, 82 also tilt laterally and horizontally. The flat plates constituting the extension arms 81 and 82 are perpendicular to the plane in which each support arm 101 rotates around the rotation support bolt 102.

Therefore, when the extension arms 81, 82 are tilted upward and downward with respect to the initial plane of the entry web at the point where the entry web enters the extension arm, the inner edges of the extension arms 81, 82 are at the entrance of the extension arm. It widens from the point where the inner edges overlap both horizontally and vertically in the direction from the end to the exit end. Each of the extended arms 81 and 82 is
A gripping device is provided for holding the edge of the web as it travels and conveying it along the extending arm.

In the embodiment of FIGS. 1 to 10, this gripping device has endless grooved belts 114, 116 and blade-like endless belts 117, 118 cooperating with these grooved belts. As shown in FIG. 6, the belt 114 has plate-shaped metal links 119 made of, for example, steel, which links have toothed protrusions 12 that engage the drive sprocket for the belt.
1. Standard Morse silent chains can be used as the belts 114,116. A groove 122 is cut into the outside of each belt. As clearly shown in FIG.
2 and further includes a retaining edge portion 124.
It is positioned and guided by a guide rod 123 having a .

These guide rods 123 are fixed to the support arm wire 1 with bolts 126. As shown in FIG. 3 and FIG.
It is hung around an idler pulley 128 attached to the front end of the support arm 101, and further over a tension idler pulley 129 supported by a central bracket 131 along the support arm 101.

The tension pulley 129 is inserted into the slot 13 of the bracket plate 131.
The tension of the grooved belt is adjusted by being movably supported within the grooved belt. Support arm 101 includes a plurality of longitudinally spaced sockets that support idler pulleys 128 at various locations along arm 101. This results in
Because the effective length of the gripping runs of the belts 114, 116 is adjusted, the point at which gripping contact with the belts 114, 116 is broken can be adjusted to allow webs of different widths to be stretched on the machine. In the embodiment, the tension pulley 1
Since the bracket 131 supporting the belt 29 is removably attached to the arm 101, a bracket with a different arm length can be used instead of the belts 114 and 116 without having to replace the belts 114 and 116 with new belts with different lengths. Belts 114, 11
The length of the effective grip running portion of No. 6 can be changed significantly. Endless blade-like belts 117, 118, cooperating with the grooved belts 114, 116, are hung over drive pulleys 132, 133 connected to the rear end of the support arm 101, and are further adjusted into slots 137 at the front end of the support arm 101. 134 and 136, respectively, which are reliably mounted.

As shown in FIGS. 1, 4, and 5, grooved belts 114, 116 run perpendicularly to blade-like belts 117, 118.

In operation, the web moves forward from the roller 87 to the feed plate, the edges of which are connected to the grooved belt 114 by the sprockets 127, 130.
, 116 are pressed and held at the point where they come into contact with the blade-shaped belts 117, 118. Adjacent to the outer edges of the plates 81, 82, the blade-like belts 117, 118 run in grooves formed between the support strip 109 and the spacing strip 11. Next, in FIG. 3, belts 114, 116, 117,
118 drive mechanisms are shown.

Motor 138 drives pulley 139 via gear box 141. Belt 142 transmits drive power to main drive pulley 143 which rotates spur gear 144 which is supported on a laterally extending shaft 146 of adjacent support arm 101 which supported extension arm 81. . The spur gear 144 drives a parallel shaft 148 that rotates the sprocket 127.
7, and the grooved belt 114 is driven by engagement with the inner teeth 127 of the grooved belt 114. axis 1
A bevel gear 149 on 48 drives a vertical shaft 151 via a bevel gear 152, which shaft 151 has a blade-shaped belt 117.
A pulley 153, which is connected via a belt 154 to a pulley 132 that drives the motor, is rotated. The main drive pulley 143 is
A sprocket wheel 158 is coaxially connected to a sprocket wheel 156 that drives a rotating chain 157, and this sprocket wheel 158 rotates the web 5 toward the extension arms 81 and 82.
It is connected via a shaft 159 to one of the rubber-coated rollers 87 that feed the rollers 8 to 8.

The rollers 87 are integrally connected at one end via gears 161 and 162 that mesh with each other. A shaft 163 extending from one of the rollers 87 at the other end drives a sprocket 164. The shaft 163 is connected via a chain 165 to a sprocket wheel 166 which is connected to a shaft 167.
A horizontal shaft 168 driven through spur gears 169, 171 and a vertical shaft 17 driven through bevel gears 172, 173.
The shaft 167 connects the grooved belt 1 through a mechanism that is substantially the same as that already provided for the belts 114 and 117, including the grooved belt 1.
16 and the blade-shaped belt 118. The chain 157 that drives the rubber-coated feed roller 87 further includes:
A sprocket wheel 174 coupled to a power removal shaft 176 is driven via a shaft 177 and a pair of bevel gears 178.

This power take-off shaft 176 is used in a drive device for structuring the wrought metal output web from the stretching machine into a multilayered mass, or serves to synchronize the operation of this device with the operation of the stretching machine. 9 and 10 show the grooved belt 114 and the blade-like belt 11 on the side of the stretching machine that supports the stretching arm 81.
The configuration of the drive mechanism for 7 is shown in detail. As shown in the figure, the main drive pulley 183 is integrated with the lateral drive shaft 146 and the outer plate 8
It is supported by a bearing 179 connected to 3. Drive shaft 1
48 is supported by bearings 181 and 182 fixed to a support arm 101 connected to the inner plate 89. In order to laterally adjust the position of side plate 89, there must be a means to adjust drive shaft 148 relative to main drive pulley 143.

To accomplish this, the shaft 146 is supported at one end of a bearing 183 connected to the inner plate 89 via a bracket 184, and the main drive pulley 183 is connected to the main drive pulley 183 by a key member 187 installed inside the main drive pulley 143. A shaft 146 is slidably adjustable within a cylindrical sleeve 186 which is keyed on both sides of the shaft 146 and extends through an axially extending slot in the sleeve 186 and into an axial slot 188 in the shaft 146. All you have to do is engage it. The shaft 146 connects the shaft 146 to the bearing 18.
It is held loosely by the bracket 184 by a C-clip 189 which holds it against the inner race of No. 3, and the other side of the inner race engages the large diameter end 191 of the shaft 146. The outer race of bearing 183 is pressed lightly by C-clip 192 into a cup 193 connected to bracket 184. Because shaft 146 is free to slide within sleeve 186, it moves laterally with bracket 184, side plate 89, and shaft 148 as the position of inner plate 89 is adjusted.

On the opposite side of the machine, a spur gear 1 is installed with a similar allowance.
69 must be laterally adjustable relative to sprocket wheel 166.

To this end, the shaft 167 is supported on a bearing on the inner plate 89 that slightly opposes the axial movement of the &ζ axis relative to the plate 89, and the shaft 167 is connected to the sprocket wheel through a mechanism that allows free relative axial movement. Just lock the key at 166. To explain the operation, a press slit is drawn from the coil material 57.
The web 58 is fed forward via the engagement of the driven feed roller 87 until it reaches the entry zone between the upper and lower extension arms 82 and 81, where it passes the web between the upper and lower extension arms 81, 81 and 81, respectively. 82
Two sets of blade-shaped belts 117, 118 that are pulled forward along
The web edges are gripped by the grooved belts 114,116.

The edge-grabbing action in which the metal web 58 is pressed and deformed by the blade-like belts 117, 118 into the grooves of the belts 114, 116 is illustrated in FIG. The web is carried longitudinally over the upper surface of the left extension arm 81 and the lower surface of the right extension arm 82. When the left extension arm 81 is tilted upward with respect to the initial plane of the web 58 and the right extension arm 82 is tilted downward, the inner edges of the extension arms 81 and 82 are tilted in the lateral direction and in the direction perpendicular to the initial plane of the web. becomes Suehiro in both directions. As the web moves forward, it fits laterally into the inner edge of the extended arm. FIG. 8 shows the stretched state of the slit metal foil 58, in which a row of parallel vertical slits 19 of uniform length are formed.
The slits in adjacent rows of the plates are arranged in parallel columns at equal intervals and are staggered in the longitudinal direction.

The divergence of the extension arms 81, 82 creates a lateral tension in the web 58, causing the slits 194 to widen into a diamond-shaped mesh along the zone where the web 58 spans the edges of the extension arms.
In the area where the web 58 is in contact with the flat surfaces of the extension arms 81 and 82, the web 58 is supported without being deformed, so the slit 194 does not widen until the web 58 fits into the edge of the extension arm. I'm here. In order to obtain a diamond-shaped net with uniform size and orientation, the extended and extended arms 81,
It is desirable to arrange the extension arms 81 and 82 with the edges of the extension arms 82 inclined relative to the slit 194.

This orientation is shown in FIG. Lateral elongation of the web,
That is, the increase in the width of the expanded web compared to the initial web can be changed by swinging the expanding arms 81, 82 toward and away from each other about the axis of the bolt 102.

When the inclination angles of the arms 81 and 82 are adjusted by tilting the support arm 101 about the axis of the port 102, the stretched webs are aligned with the two sets of belts 114, 117 and 116, 118.
When they are separated from each other, the front ends of the extension arms 81, 82 swing around the tilt axis, so that as the adjustment is performed, one arm is raised and the other arm is lowered. When the adjustment is completed, the sub-frame 21 of the machine is aligned with the axis 2 by rotating the handle wheel 38.
By tilting around point 2, the output stretched web surface is restored to a horizontal state. To adjust the machine to use different web widths, adjust the position of the inner plate 89 and tighten the adjustment bolt 94.
can be used to move the inner plate 89 together with the support arm 101 and the two sets of gripping belts 114, 117 and 116, 118 towards or away from each other.

The rear edges of the extension arms 81 and 82 should not overlap, causing undue strain on the web, or the web may become unsupported due to the gap created between the extension arms at the entrance, resulting in unsupported portions of the web. In order to prevent the net from spreading out and making the direction of the net uneven, when making lateral adjustments, use the extension arms 81 and 82.
Instead, a new set of extended arms is required. As mentioned above, it is desirable to maintain a constant orientation between the slit line of the web and the inner edge of the extension arm.

Therefore, when stretching webs of different widths but with the same slit line size and shape, the substituted stretching arm in the machine should be geometrically the same as the original stretching arm. As mentioned above, in order to relatively easily replace a new set of extension arms in a machine, loosen the bolts 110 and replace the extension arms 81 in use.
, 82 and insert a new set of extension arms with support strips 109 provided with holes for the bolts 110.

When attaching a new set of extension arms to the machine, the belt 114
, 117 and 116, 118, it is necessary to detach the web at the point where it leaves the front end of the extended arm. To make this adjustment, the front idler pulley 12 supporting the grooved belt 116 is
8 and these pulleys 128 are moved to the other side of the socket provided for this purpose in the support arm 101. Adjust the position of the tension pulley 129,
Maintain the tension on the belts 114, 116, and replace the support bracket 131 of the pulley 129 with a bracket of a different length if necessary. Next, the embodiment shown in FIGS. 11 to 19 will be described.

In this embodiment, the edges of the web are not gripped along the narrow deformation line (line of groove 122), but at each edge between the smooth surface and the wide belt. This wide belt accommodates webs of different widths so that the lateral spacing of the extension arms does not have to be adjusted. Therefore, in this embodiment, the attachment portion 28 of the width frame 21 has this attachment portion 28.
A pair of supporting side plates 210 are directly connected to the supporting side plates 8 . Each board 2
10 has a right-angled lower rear extension 221 through which the plate 210 is secured to the mounting part 28 by bolts 222.

Plate 210 is clamped outwardly by triangular strips 223. The upper part of the plate 210 is provided with a cylindrical horizontal brace 224.
Its lower part is connected by a rectangular channel transverse brace 226. Two rubber-covered rollers 78 are vertically slidably mounted on plate 210, and a control rod 225 extending between plates 210 serves to control the vertical movement of the upper rollers.

This control rod 225 is rotatably attached to each plate 210 and supports at each end an eccentric pin connected to the mounting of the upper roller, so that when the rod 225 rotates, the upper roller 87 is moved upwardly. Move the web 58 away from the bottom roll.
can be easily passed through the machine and then closed again to securely grip the web. Operation: Handle 225a is connected to rod 225 to rotate rod 225. In front of roller 87, as shown clearly in FIG.
228 and is supported and guided between them. For convenience, the structures supporting the guide plates 227 and 228 are not shown in FIG. 1 in the drawings. The guide plate 227 has a channel-shaped horizontal support 22 in cross section.
It is supported by a pair of spaced apart arms 229 connected to 6. The guide plate 228 is supported by a pair of laterally spaced arms 231 which are pivotally connected to the arms 232.
8 is swung toward and away from the guide plate 227. Each arm 232 is connected to a cylindrical cross brace 224 via a rotationally adjustable mount. The guide plate 228 is manually moved by actuating a spring-loaded toggle link device.
Can move towards and away from 7. The link mechanism includes a rod 236 pivotally connected to the central portion of the guide plate 228.
and is pivoted to the rod 236 at the elbow portion 238, and the tension screw 234
Keyaki 237 itself is pivotally attached to the split clamp fixed to the cylindrical horizontal brace 224 between the clamps 233.
and has. Toggle link mechanism 236, 237 2
The parts are pressed together by a tension spring 241 and the manual lever 242 moves from the closed position shown in solid lines to the position shown in broken lines where the guide plate 228 swings open and feeds the tip of the web 58 into the machine. moved by. As shown in FIG. 17, the front and rear ends of the guide plates 227, 228 are rounded to prevent damage to the thin foil that is passed through the machine.

Loosening the clamp 239 adjusts the position of the guide plate 228 to align it parallel to the guide plate 227.

A pair of hollow rectangular cross-section support arms 101 that support the extension arms 81 and 82 are supported inside the side plate 210 in front of the guide plates 227 and 228.

As shown in FIGS. 17 and 18, each arm 101 is supported on the side plate 210 by two bolts 243 passing through arcuate slots 244 in the outer wall of the arm 101. As shown in FIGS. Each support arm 101 has a dowel pin 246 attached to its adjacent side plate 210.
The position of this dowel pin is as shown in FIGS. 17, 18 and 19, in a hole passing vertically through the side plate 89 and partially through the wall of the arm 101, and extending through the support arm 101. 101 in a hole through a small block 245 welded to 101.

The arcuate groove 244 of the support arm 101 is connected to the dowel pin 246.
Since it is concentric with , when loosening bolt 243,
The angle between the support arms 101 can be adjusted by swinging the arms about the axis formed by the dowel pins. Since these two dowel pins 246 are coaxial, the support arm 101 rotates about the common axis together with the extension arms 81 and 82. As shown in FIG. 11, each of the extension arms 81, 82 is fixed to the support arm 101 by a bolt 247, which bolt 247 fits into a circular hole at the rear end or entrance end of the extension arm. Serving as a pivot point around which the extended arm can swing in its own plane, a series of bolts 248
It passes through a short arcuate slot 249 that is concentric with the bolt 247, and is adjusted while restricting the swinging of the extension arms 81 and 82 relative to the support arm 101, respectively, about the bolt 247.

Each arm is provided with a fine adjustment member to control this adjustment. This adjustment member is shown in FIGS. 11 and 15.
As shown in the figure, a bracket 25 connected to the arm 101
It consists of a screw 251 passing through 2. The axial movement of the screw 251 is controlled by the screw 251 connected to the bracket 252.
is regulated by bosses 253 that abut on both sides. screw 2
51 is screwed into a rotatable dowel 254 within a block 256 fixed to the extension arm 82. Block 25
6 is provided with a hole 257, and the screw 251 is inserted into the hole leaving enough clearance to allow the block 256 to swing relative to the screw 251 in a restricted manner. A knurled knob 255 is provided to rotate the screw 251 to move the arm 81 laterally relative to the support arm 101. The gripping device for holding the edge of the web 58 and conveying it along the extending arm consists of an endless elastic belt 258, adjacent to the outer edge where it contacts the surface of the arm 81 or 82 along which the web 58 runs. and run along the extended arm.

Each belt 258 is supported by pulleys 259 and 261 attached to the inside of the support arm 101 at both ends of the extension arm.

The pulley 259 at the rear end of the extended arm is driven, but the pulley 261 at the front end serves as an idle pulley. Pulley 259,
The inner surfaces of the belt 261 and the belt 258 are provided with cooperating ribs to positively engage and drive the belt. As shown in FIG. 16, the belt 258 is of composite construction, consisting of an inner ribbed abrasion layer 262 and a thin outer layer coated with a soft elastic material, such as neoprene rubber, to better abut the stretched web. Become. Belt 2 adjacent to extended arm 81 or 82, respectively
The running surface of 58 is pressed toward the extender arm and increases the frictional engagement with the web 58 by a series of pressure pads 264.

These shoes 264 are arranged along the entire length of the belt with small spacing between each shoe, each shoe consisting of a flat metal plate with a gently upwardly curved end 266, The edges of the ribs are prevented from being caught by the edge of the shoe. Each shaft 264 has a central pillar 2
67, this central column is parallel to the plane of the shoe and its outer end is fixed inside the support arm 101 by a connecting member.

Each post 267 receives a bolt 268 at its inner end and carries a guide strip 269 that
It extends along the inner edge of the belt 258 and partially overlaps and engages with the side edge of the belt 258 to guide the belt 258 and restrict its lateral movement. Post 267 has a narrow central portion 271 and a pair of spaced circumferential grooves 272 on either side of this portion 271 .

A guide block 273 is secured to the center of each shoe, the free end of which is formed with a central slot 274 into which a neck portion 271 is received with light friction. The sides of guide block 273 frictionally engage the end shoulders of neck portion 271. The split pin 276 passes through the free end of the guide block 273 so that the guide block 273
It is loosely held together with the pillar 267. receiving a curved portion of a stiff wire spring 277 in each groove 272 of the post 267;
The end of the spring presses the shoe 266 against the extension arm 81, applying spring pressure to the belt 258 and gripping the edge of the web 58 to hold it against the extension arm 81.

To adjust the tension on belt 258, each idler pulley 261 has a longitudinally adjustable support member, as shown in FIG.

The support arm 101 has slots 278 and 279 formed on its inner and outer sides, and accommodates a cylindrical mounting member 281 for receiving the axle of the pulley 261 therein. Mounting members 282, 28
3 has spaced shoulder plates 282, 283 on the inside;
These shoulder plates slide against the edges of the slots 278 of the support arm 101. The longitudinal position adjustment of the mounting member 281 together with the pulley 261 is effected by means of an adjusting bolt 284 whose head engages in the end wall of the support arm 101 and whose threaded shank engages in the threaded hole of the mounting member 281. 287. A cover 288 or a protective plate having a chevron-shaped cross section is placed over the belt 258 and the pressure buckle structure, and this cover is screwed to the support arm 101 with screws 289.

The surfaces of the arms 81 and 82 on which the web 58 runs, i.e.
The upper surface of the left arm 81 and the lower surface of the arm 82 are smooth surfaces at least along the main length of the arm extending forward from the rear end or entrance end of each arm.

These surfaces are polished or polished chrome plated surfaces. Alternatively, these surfaces may be coated with a low friction coating, such as a low friction plastic coating such as a Teflon coating, to allow the stretched web to slide smoothly over the arms 81,82. According to this configuration, damage, deformation, or abrasion of the stretched thin foil is reduced, and at least the belt 25
If the full width of the web extends over the extended arm surface, the edges of the web can be gripped and held well. However, as clearly shown in FIG. 11, at the front ends of the extended arms 81 and 82,
Belt 258 extends beyond the sloping inner edges of arms 81, 82, in this area belt 258 and arms 81 or 82
The width of the foil 58 gripped between the two ends becomes somewhat smaller. To prevent the edges of the foil from separating too quickly, extend arms 81 and 8.
2 can be grooved at the front end of the surface adjacent belt 258 to improve frictional grip. For convenience of processing or because the smooth edges are replaced, grooves are unnecessary for good gripping, or grooves may unduly damage, deform, or wear certain foils. As shown in Figures 1 and 15a, the extension arms are provided with separate end pieces 81a, 82a having grooves 290 formed therein. These grooves 290 extend parallel to the support arm 101, have a sawtooth profile, and have sloped surfaces thereof such that the end pieces 81a,
The shape is such that the foil does not recede laterally away from the inner edge of 82a. The end pieces 81a, 82a are held in contact with the main parts of the arms 81, 82 by being fixed to the lock 256 of the fine adjustment device by means of a bolt 300, and are further held in contact with the main parts of the arms 81, 82 by means of a bolt 24 at the front end of the support arm 101.
8 on the support arm 101. Next, the first
Referring to FIG. 2, the drive mechanism for belt 258 and roller 87 is shown.

Except as noted below, this mechanism is the same as the configuration shown in FIG. 3 above. In this example, the shaft 146 is connected to the side plate 89
It is pivoted on a bracket 291 on the outside. Gear 14
4 meshes with a spur gear 147 on a ZU parallel shaft 148 mounted on the support arm 101 that rotates a pulley 259 that drives a belt 258.

The sprocket 164 is connected via a chain 165 to a sprocket wheel 166 connected to a shaft 167 mounted on a bracket 292 on the outside of one side plate 210. The shafts 146 and 167 are connected to each other and the extended arm 81
, 82 are made coaxial with the dowel pin 246, which is the center of rocking, so that when the angle of the extension arm is adjusted, the gears 147 and 171 move toward the gear 1, respectively, without losing driving engagement.
It swings around 44 and 169. The operation of a machine is generally
As described for the embodiment shown in FIGS. 1-10, the guide plate 228 is initially in the open position until the edge of the web is gripped between the belt and the arm and the roller 87
are in separate locations.

Guide plate 228 and roller 87 are then restored to the sealed position, so that when the machine is subsequently operated, roller 87 advances the web and guide plates 227, 228 smooth the web feed and direct it to the arm. Extended arm 81 aligned with the trailing edge of
Direct delivery to 82. Since the distance between the guide plates 227 and 228 is selected depending on the thickness of the web 58 used, the web 58 can run freely between these guide plates and is reliably guided without being displaced. Stretching is then carried out in the same direction as described above for the machines shown in FIGS. 1-10. According to this example, the above-mentioned arm 81 is used to make the diamond-shaped net uniform in size and orientation.
, 82 are adjusted using the fine adjustment member 251. To change the degree of lateral stretching of the web, that is, the increase in width of the stretched web compared to the original web, the stretching arms 81 and 82 are moved toward and away from each other and swung around the axis of the dowel pin 246. All you have to do is move.

The stretching machine shown in FIGS. 11-19 is capable of processing incoming webs of different widths, and the permissible range of variation in width is about twice the width of the belt 258 used.

Within these limits, the edges of the web are gripped between the overlap area between the belts 258 and the extension arms 81,82.
The illustrated embodiment of supporting the belt 258 so as to extend beyond the inner sloping edges of the front extension arms 81, 82 is particularly advantageous because it leaves no unextended edges and is free from the plane of the unextended product. This is because the web is stretched over its entire width without deforming the edges of the web.

As shown in FIG. 16, toward the front end of the extended arm, belt 258 extends inwardly beyond the medial sloped edge of the extended arm.
In fact, as shown in FIG. 16, the stretchable material 291 has a steep slope, and the belt 258
Since they are separated from each other, they do not interfere with the free extension of the web. In front of the area shown in FIG.
As discussed above with respect to the figures, due to the proper angular orientation between the inner edges of arms 81, 82 and the slits in web 58, the edge portions of web 58 are unrolled before the web reaches the front end of the machine. As such, the web is stretched to the same predetermined extent as the intervening portion of the web. For the production of expanded webs for use as explosion-proof fillers in fuel containers, it is preferable to use e.g.
．． 0005 to 0.012 inches (0.0127 to 0.0005 to 0.012 inches)
Use metal such as aluminum alloy foil (304 mm).

In order to obtain optimum blast resistance, it is preferable to use a mesh having a certain mesh size. Preferably, the stretched net has a maximum width dimension, i.e., the distance between the longitudinal extremes of longitudinally adjacent nets (
The distance A-A) in FIG.
92 and 293 centers) is 1/16 to 5/8 inch (1.59 to 15.9 mm) and wider (dimension B-
B) is 1/32 to 7/32 inch (0.8 to 5.5 m
m). Preferably, the lateral dimension of the foil is expanded by about 284 percent in a direction extending transversely to the slit line. This stretching causes the foil to shrink by about 87 percent of its original dimension in the longitudinal direction of the slit line. Although this is just an example, at the above expansion degree, the initial
A piece of foil measuring 41/4 x 12 inches (362 x 305 mu) (171 square inches in area) is 401/2 x 101/
2 inches (1060 x 266 mm) (425 mm as area)
square inch).

This represents an area expansion of 248%.
The produced expanded mesh, which is used as an explosion-proof filler, is laid down in superimposed layers to form a package and is then used as a filler mass occupying the interior space in a fuel container.

The package can be formed, for example, by winding the expanded wire into a cylindrical coil, folding it, or cutting the web into uniform strips and stacking them.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the first embodiment of the stretching machine, Figure 2 is a side view of the coil material holder of this machine as seen from arrow A in Figure 1, and Figure 3 is a mechanical diagram of the machine. The drive mechanism is shown in Figure 4.
A side view showing one of the extension arms of this machine along line 4-4 in the figure, Figure 5 is a cross-sectional view of the extension arm along line 5-5 in Figure 1, and Figure 6 is a web conveyance Detailed view of the belt in the device; Figure 7 is a vertical sectional view of the main frame and sub-frame of the machine along line 7-7 in Figure 1; Figure 8 is a slit in the area circled by 8 in Figure 1. A detailed view of the foil fitting into the sloping line of the extended arm, shown on the same sheet of paper as FIG. 3; FIG. 10 is a vertical cross-sectional view of the spreading arm support taken along line 10--10 in FIG. 9; FIG. 11 is a perspective view of the spreading machine according to the second embodiment; FIG. Detailed view of the drive mechanism of the endless web conveying belt in the machine shown in Figure 1.
3 is a cross-sectional view of the extended arm taken along line 13--13 of FIG. 11, and FIG. 14 is a partial cross-sectional view taken along line 1414 of FIG. 11 showing the endless belt support at the output end of the extended arm. , Fig. 15 is a plan view of the adjustment mechanism for the extended arm, Fig. 15a is a cross-sectional view taken along line 15a-15a in Fig. 15, Fig. 16 is a partial view of the extended arm, and Fig. 17 is a diagram of the machine. FIG. 18 is a partial sectional view taken along line 17-17 in FIG.
The first one showing the outside of the extended arm in relation to line 18-18 in the figure.
A partial sectional view similar to FIG. 7, and FIG. 19 taken along line 19 in FIG. 11.
-19 is a view from behind of the extended arm. [Explanation of symbols of main parts], 20...Main frame, 2
1...Sub-frame, 29,44,46...Tension rod, 38...Handwheel, 43...
Side plate, 58...Slit web material, 60...
... Hydraulic cylinder, 71, 74 ... Roller, 77 ... Rod, 81, 82 ... Extension arm, 83 ... Outer plate, 87...Rubber coated roller, 89...Inner plate, 101...
Support arm, 114, 116... Grooved belt, 1
17,118...Sword-shaped belt, 123...
...Guide rod, 142,154...Belt, 2
10... Support side plate, 229, 232...
・Arm, 258... Endless elastic belt, 262...
...wear-resistant layer, 263 ...outer layer, 269
...Guide strip, 277...Wire spring, 288...Cover.

Claims (1)

[Scope of Claims] 1. A pair of extended arms having vertically and horizontally divergent edges, along which a slit web is connected at each edge of the web to the extended arms. an extender arm such as to be gripped and conveyed between a driven belt running along the extender arm and pressed toward the extender arm, the web extending laterally beyond the divergent edge; The extending arms 81, 82 are spread out between the edges so as to slide in the direction and widen the slits of the web to form a diamond-shaped mesh. The frame 28 is connected to the frame 28 by means of connecting members 243 and 244 which are adjustable so that they can be made larger or smaller.
, 210, 20, 31, the surface of each spreading arm 81, 82 is a smooth surface at least in the area extending from the rear to the front of the arm and over the main part of its length. and the belt 258
is soft and elastic, and the belt (first
1 to 19))
A metal web stretching machine characterized in that the machine is pressed toward the arm by a metal web stretching machine. 2. Machine according to claim 1, characterized in that the belt (258) has an inner wear-resistant layer (262) and an outer layer (263) of soft elastic material against which the web is pressed. 3. The belt 258 connects each extended arm 81, 82 at the front end.
and extends beyond the divergent edge of the extended arm 8 at this end.
1 , 82 has a longitudinal groove 290 for frictional contact with the web 19
The machine described in paragraph or paragraph 2. 4. Machine according to claim 3, characterized in that the grooves 290 are of serrated cross section. 5. The extension arms 81 are attached to the subframes 28, 210 by adjustable connecting members 243, 244 so that the angle between the edges of the arms 81 can be widened or decreased, and , 210 are attached to the main frame 20, 31 by other adjustable connecting members 36, 37 and 32, 34 so that the secondary frame is centered on a pivot line 22 extending longitudinally in the direction of movement of the web along the arm 81. Machine according to claim 1, characterized in that it is adapted to be tiltable. 6. Machine according to claim 5, characterized in that the pivot line 22 extends through the center of the web 79 as it moves along the extension arm 81. 7 The extension arm 81 is made of flat, smooth-surfaced triangular plates, each plate having a transverse axis 2 extending across the longitudinal axis 22.
7. A machine according to claim 5 or 6, characterized in that the machine is supported for rotation about 46. 8 Each extended arm 81 , 82 is supported by means 101 , 248 so that the extended arm can be moved over a limited range by pivoting the arm in its own plane about a pivot line 247 . 8. A machine according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the machine can be adjusted within a range of 1 to 3. 9 a support structure 20b for rotatably mounting a coil 57 of slit metal web material and a guide between said coil support structure 20b and an extension arm 81 for feeding said slit web directly to the arm; Means 71, 74
, 77, 87. 10 A smooth rod 77 non-rotationally supported between the coil support structure 20b and the extending arm 81 and inclined in a direction non-perpendicular to the web feeding direction along the extending arm 81, 10. Machine according to claim 9, characterized in that the rods are oriented from a transverse direction to a longitudinal direction by sliding around the bar. 11. Machine according to claim 10, characterized in that the bar 77 is parallel or aligned with the entire surface of the web in the area 79 approaching the extension arm 81. 12. A machine according to claim 9, 10 or 11, characterized in that the coil support structure 20b is normally connected to the main frame 20a of the machine but is adapted to be separable.