SE501580C2 - Procedure and apparatus for affixing messages on picture changing sign - Google Patents

Abstract

The present invention relates to a method and a device for applying a removable message on a sign for consecutive repeated presentation of series of images and of the type wherein each image is made up of a plurality of image portions located on rotatable prisms or display screens having a cross section such as that of an equilateral triangle and wherein the same poster blades as for common billboards are used. The object of the invention is to permit an easier, safer and quicker replacement of messages. This is arrived at by providing each screen side (3) with a plastic foil (4) which covers said screen side and which is located at a small distance outside the screen side and by inserting from below into the space provided therebetween, the message in the form of a paper strip (28) by means of a rigid band (22) which from a coiled position on a tool located on a lower beam (1) of the sign is brought to enter between the screen-side and the plastic foil and to the uppermost portion (27) of which the incoming paper strip (28) is momentarily attached. <IMAGE>

Description

501 580 leaves on the front of the sign. These prism sheets are transported to a studio where the old message of paper pasted on the prism sheets is removed by soaking and scraping. The cleaned prism sheets are then set up on a stand in the studio, after which the new poster sheets are glued on. After drying, the narrow strips between the prism leaves (later the prisms) are cut off. The prism sheets are taken down from the stand and transported to the sign where they are attached. A batch of prism leaves for a sign page usually weighs about 70 kilos. Of course, several rounds of prism sheets can be used, making the work easier. However, it is a significant and time-consuming work with cleaning, gluing and transporting the heavy prism leaves.

The object of the present invention is to simplify the exchange of messages consisting of the same paper posters as are used on ordinary billboards.

This is mainly achieved by providing each prism side with a covering plastic foil located at a close distance outside the prism side and by postponing the message in the space created from below in the form of a strip of paper by means of a rigid strip, which from a rolled-up position on the sign's lower beam existing tool is brought in between the prism side and the plastic foil and on the upper part of which the incoming paper strip is temporarily attached.

The invention has the special features which appear from the claims and will be illustrated in more detail below with the aid of figures where exemplary embodiments are shown in principle.

For the sake of clarity, certain dimensions are exaggerated.

Figure 1 shows a launching gear attached to the lower part of the sign seen in the direction of the sign.

Figure 2 shows the implement according to figure 1 seen in section A-A.

Figure 3 shows the lower part of a prism sheet with applied plastic foil.

Figure 4 shows the prism sheet according to figure 3 seen in section B-B. 501 580 Figure 5 shows the prism sheet according to figure 3 seen in section C-C.

In Figures 1 and 2, the lower frame beam of the sign is denoted by 1.

A rail 2 is permanently mounted on this. Above the frame sheet, the lower part of two prism sheets 3 can be seen. Their attachment is not shown here as it does not concern the invention. Of course, the sign contains a large number of prism sheets, but for the description of the invention, only the two prism sheets are shown here outside which the launching gear is located.

The prism leaves have transparent sheets of plastic foil 4, which enclose the long edges of the prism leaves. The plastic foils reach up to as far as the prism leaves but end at the bottom a bit above the lower edge of the prism leaves. The plastic foil is folded short at its lower edge 5.

On the plastic blades which can suitably be made of extruded aluminum, two ribs protruding from the otherwise flat surface are shown. The plastic foil, which should be located at a small distance from the front surface of the prism blade, is shown in Fig. 2 for a large distance from this surface.

7 denotes a plate, which can be said to be the frame part of the implement. There are two hooks 8 fixedly mounted on this part, which grip the rail 2 and hold the implement on the rail.

The implement is easily displaced laterally on the rail so that it can come in front of other pairs of prism blades. Attached to the frame part is a holder 9 in the outer end of which a shaft 10 is attached to which there are two rotatable rollers, of which only one 11 is shown in the figures. The rollers are intended to support rolled image strands 12. In this case where the implement has two rollers, the number of image strands on each roll when the launch of these begins is half the number of prism sheets. Each image wet is a strip of paper whose width is approximately the same as that of the prism sheet and whose length is slightly shorter than the prism sheet. An outer arm may be present (not shown) which resiliently presses on the outside of the image waves on the roller. 501 580 In the frame part 2 two projecting supports 13 are attached to the inside of which two circular covers 14 and 15 are attached. In the center of the covers is a shaft 16 mounted on which two wheels 17 are fixed. The shaft 16 projects at one end from the housing 14 and at this end a gear belt wheel can be fastened to rotate the wheels 17 motorically. At the other end of the shaft a crank 18 is fastened. A cylinder 19 with a spiral groove 20 is attached to the middle part of the shaft. An arm 21 is hingedly attached to the support part 9 at one end and is designed at its other end so that it enters the groove 20 and is guided by it.

One end of a flexible rigid steel strip 22 is attached to each wheel 17. This band is wound on the wheel. Outside the steel strip, a large number of rotatable pulleys 23 are fixed in the housing. The rigid steel strip supports the pulleys, which enable the steel strip to be extended. Two supports 24 with four pulleys 25 each are attached to the frame part 7. The supports form guide channels which lead the steel strips to get right in the grooves 26, which are formed between the protruding ribs 6. At the outer end of the steel strip is a wide support 27 stipulated. An image wave 28 is shown slightly elongated. It has in its outermost (upper) part been folded over the support 27. The steel strip with the support 27 and the upper part of the image wadding 28 have entered a small piece under the plastic foil 4.

Figures 3 to 5 show on a larger scale the lower part of a prism sheet 29. This has grooves 30 along its two long edges. At the front there are a plurality of longitudinal ribs projecting from the surface. The two middle ribs reach the farthest from the one between the ribs flat surface. Especially between these two middle ribs a groove 32 is formed, the intention of which is to guide the steel strip laterally.

A 0.7 millimeter thick UV-stabilized plastic foil 33 is designed at its edges to fit in the grooves 30. The plastic foil is applied to the prism sides from one end of the prism sheet and closes tightly to the prism sheet in the two grooves 30. p. 501 580 The plastic foil, which is slightly curved outwards, it is located one or a few millimeters outside the ribs 31 of the prism sheet. The plastic foil is so fastened on the prism side through the grooves 30 that it cannot shake down. The plastic foil has in its lower part been developed with a rounded edge 34 and ends a bit above the lower edge of the prism blade.

A leaf spring 35 is rotatably attached to the lower part of the prism blade by means of a rivet 36. The leaf spring can be pulled out slightly in its free upper part and then turned 900 to the side.

In the position shown, the spring is prevented from being rotated partly by its tension against the prism blade and partly by the ribs 31.

The task of the leaf spring is to prevent the paper warp from shaking down. The lower edge of the paper warp can either rest on the top of the spring or the warp can go further down and be clamped between the spring and the prism sheet. The latter may be preferable as it may facilitate the removal of the wad.

In the exemplary embodiment shown in the figures, prism sheets are used. Three of these are attached to a central body and together they form a prism with a cross section of an equilateral triangle. However, it is possible to use prisms where the three sides are firmly joined. In such a prism, there must be grooves in its three long edges so that the long edges of the plastic foils, which can then be of a slightly different design, can enter.

Before a picture change, the message is laid out in a studio in the form of 6 to 18 poster sheets. These are the same sheets that are used for pasting on the usual large billboards, the so-called billboards. The leaves are glued to their overlaps or they are cut edge to edge without overlap and taped together. Then they are cut into strips of approximately the same width as the prism sides. When cutting, a narrow strip is cut away between each strip of image corresponding to the space between the prisms. It is an advantage that the paper can be dry when cutting because it is then easier to perform. The cut strips are rolled up tightly on two rolls ll. In this case, every other image strip is wound on one roll and every other on the other roll. When all the warps are rolled up on the respective rollers, rubber bands are put around the rollers so that the warts do not roll up. Instead of rolling up the webs on the rolls ll, they can be rolled up on disposable cardboard sleeves. These sleeves are then applied to the rollers 11, which can then be permanently attached to the tool.

At the sign, the old message is removed by grabbing the lower part of the warp by hand or with a special tool and pulling it down a bit. The warp can then either be wound on a roller or get in between a motor-driven roller pair that quickly pulls the warp down from the prism side. In the latter case, the extended rags can more or less folded end up in a box below the pulling tool. The caddis are compressed so that discarded ones are left for paper recycling.

After removing the old message, the launching gear is placed on the sign 2 of the sign and pushed to the side so that it comes in the middle of the outermost pair of prism sheets. The rollers 11 with the image warps 12 are attached to the shaft 10, the rubber cords are removed and an arm is applied to the tool each, the roller (not shown) which prevents the warps from rolling up. The mounting of the rollers on the shaft can of course also have taken place before the implement has been fitted to the sign. Then the two webs 28 are pulled out slightly, double-folded at their ends and these are placed over the supports 27, after which the steel strips with the supports 27 and the attached webs are made to enter the space between the prism sheets and the plastic foils by means of the crank 18. With continued weaving, the warps are increasingly opened up on the prism sides. A lid can be attached to the top of each prism sheet. This then constitutes a stop for the launch of the image wave. It also serves as a seal against incoming rain and moisture. 7 501 580 When the warps have reached all the way up to the lids, they have along their _length contact with the prism blade and the plastic foil and remain when the steel straps are cranked back down the grooves 26 and up on the wheels 17. The weaving is stopped by the supports 27 going towards the guide channels 24. the tool two price announcements aside. The two leaf springs (35) are rotated back so that they prevent the newly set image waves from shaking down at the sign's image changes. After this, the launch of the two adjacent image waves begins in the same way as just described.

The roll-out and rolling-in of the steel strips can take place by means of an electric motor and a timing belt transmission to the shaft 16.

In this case, an electrical contact can be mounted in the arm 21, whereby the contact is influenced by the end positions in the groove 20 in the cylinder 19. The contact in turn affects the motor. When hand-cranking, the cylinder can be dispensed with if the prism sides are fitted with lids as above.

Through the invention, the work on the sign can only take place from the lower part of the sign, which is a great advantage since work at higher altitudes, especially in strong winds, entails accident risks.

Through the present invention, what is needed for image exchange is only the relatively simple and light tool for launching (attaching) the new message with the message wound up on two small rolls or cardboard sleeves and a simple removal tool. This should be compared with the weight of about 70 kilos for messages pasted on prism sheets. This for an image page. Often two or all three sides of the sign are changed at the same time. A comparison can also be made to the advantage of the invention between the small volume of the tools and rolled-up image wires needed according to the invention and the very large volume of the three-meter-long prism sheets.

Nothing that is removed from the sign in the context of an image exchange needs to be introduced in the studio.

Claims (5)

501 580 Claim 1 Device for affixing a detachable message on an image-switching sign of the type in which each complete image is made up of a plurality of sub-images placed on rotatable prisms with a cross section of an equilateral triangle and where the same poster sheet is used for ordinary billboards is used, characterized in that each prism side (3) in a complete image has its side covered by a transparent plastic foil (4), which encloses both long edges of the prism side and is located at a small distance outside the surface of the prism side, and that when changing messages a utensil is applied to the lower beam (1) of the sign, which utensil contains a rolled up rigid band (22), which band together with an image wet (28) can enter from below from the space between the price side (3) and the plastic foil (4) and postpone image wave on the prism side. Device according to claim 1, characterized in that the prism side (3,29) has a groove (26,32) in the middle intended to laterally guide the belt (22). Device according to any one of the preceding claims, characterized in - V - that each prism side (3,29) consists of one from the other removable blades where in both long edges of the blade there are grooves (30) adapted for the long edges adapted to the grooves. of the plastic foil (4,33) so that the foil can be put on and taken off only in the longitudinal direction of the prism sheet. Device according to any one of the preceding claims, characterized in that the plastic foil (4,33) is unfolded at the bottom (5,34) and does not reach all the way down to the prism side. Device according to any one of the preceding claims, characterized in that the tool has rotatable pulleys (23) directly outside the belt (22). Device according to any one of the preceding claims, characterized in that the implement has a guide channel (24) with pulleys (25) for guiding the belt (22) from its rolled-up position to engagement between the prism side (3) and the plastic foil. (4). Device according to any one of the preceding claims, characterized in that at the end of the belt (22) there is a wide support (27) which, when the belt is rolled up, can take support against the guide channel (24). Device according to one of the preceding claims, characterized by a cylinder (19) with an arm (21), in which case an end position stop on the belt (22) can be obtained. a v, that the tool contains a spiral device according to any preceding claim, characterized in that at the bottom of the prism side (29) there is a device (35) for preventing the paper wadding from shaking down. Procedure for affixing a detachable message on an image-changing sign of the type in which each whole image is made up of a plurality of sub-images placed on rotatable prisms with a cross-section of an equilateral triangle and where the same poster sheet used for ordinary billboards is used, characterized in that each prism side (3, 29) is provided with a side covering transparent plastic foil (4,33) enclosing both long edges of the prism side and, in åV, the space created between the prism side and the plastic foil, postpone the message in the form of a paper strip (28) by means of a rigid band (22), which from a rolled-up position on a tool present on the lower beam of the plate is caused to enter between the prism side and the plastic foil and to the upper part of which the incoming paper strip is incidentally attached.