JPH0521104Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device that allows canvas to be easily and reliably stretched, for example, in internally illuminated signboards.

[Conventional technology]

There is a conventional canvas tensioning device for internally illuminated signboards as shown in FIGS. 5 and 6. That is,
a is the main body part in which the illumination device of the internally illuminated signboard is housed;
b is a frame on which the canvas c is stretched, and d is a frame decorative cover. The frame b consists of a frame body b1 and a waterproof cover b2. To fix the canvas c, insert one side edge c1 of the canvas c into the groove f of the canvas fixing rod e.
, insert the key rod g, cover it with the cap rod h, insert it into the adjustment bolt k via the coil spring i and washer j, and tighten the washer.
After fixing with j' and nuts l, fix the waterproof cover n with waterproof beat n' with screws m, and then
is held between a canvas covering board o and a waterproof beat m to make it waterproof.

With the other side edge c2 of the canvas c also stretched between the canvas tensioning plates o and o', push the other side edge c2 of the canvas c into the groove f and insert the key rod g in exactly the same manner as above. Cover the cap lever h from above and screw the nut l onto the bolt k. Then, adjust the tension of the canvas c by tightening the nut l against the spring of the coil spring i.
Adjust by tightening. Thereafter, it is fixed to the waterproof cover b2, one end of the cover b2 is fitted to the frame main body b1 with fitting members p and p', and the other end is tightened and fixed with a screw m'.

[The problem that the idea aims to solve]

However, in such a conventional canvas tensioning device, the structure of the waterproof cover b2 is complicated and the number of parts used to fix the canvas is large, which not only increases cost but also requires a large number of assembly steps and takes time. . Furthermore, as is clear from FIG. 5, unless one side edge c1 of the canvas c is fixed before starting the fixation of the other side edge c2, a tight fixed state cannot be obtained.

This invention was developed by focusing on the problems of conventional canvas tensioning devices.It has a simple structure, has a small number of parts, can be manufactured at low cost, and can easily perform canvas tensioning work in a short time. The purpose of the present invention is to provide a signboard canvas tensioning device that can be used to stretch signboards.

[Means to solve the problem]

In order to achieve the above-mentioned object, the canvas tensioning device for a signboard of the present invention has a bolt that is slidable, and
A frame frame in which a guide groove is formed to be inserted in a non-rotatable state, an inner wall is formed through a gap with the guide groove, and an extension wall is formed from the guide groove on a side opposite to the inner wall. and a canvas that reaches the extension wall through the tip of the inner wall of the frame, and whose outer peripheral edge is folded back to the back side of the extension wall, and a canvas that reaches the extension wall through the outer peripheral edge of the folded canvas. A clamping tool that is inserted into the extension wall and clamps the outer periphery of the canvas between the extension walls; a clamping tool that is inserted into the guide groove and has a threaded portion at the tip protruding through a notch in the canvas; and a tension plate whose distal end stretches the canvas between the inner wall and the guide groove by screwing and tightening a nut.

[Effect]

The canvas tensioning device for signboards configured in this way is
After inserting the bolt into the guide groove, insert the notch formed in the canvas into the bolt, wrap the outer periphery around the extension wall and fold it back, and then insert a clamping tool from above the outer periphery to tighten the outer periphery. Clamp it on the extension wall and temporarily fix it. Next, when an L-shaped tensioning plate is inserted into the bolt from above the canvas and a nut is screwed together to tighten the tensioning plate, the tip of the tensioning plate pulls the canvas, so that the canvas becomes taut. It depends on the state.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

1 is a frame with a substantially mountain-shaped cross section formed by drawing aluminum, etc., and a bottom wall 1 with a notch 1a ₁ formed in the longitudinal direction approximately at the center.
a, an inner wall 1b and an outer wall 1c erected on the inner and outer sides of the bottom wall 1a, and intermediate walls 1d and 1d _' erected to sandwich the notch 1a1 formed in the bottom wall 1a. , a pair of partition walls 1e that bridge approximately the center of the intermediate wall 1d, and the one intermediate wall 1
Auxiliary wall 1 erected between d' and the outer wall 1a
f, and a top wall 1g connecting the upper ends of the intermediate walls 1d, 1d' and the auxiliary wall 1f, and having a notch 1g ₁ formed at a position corresponding to the notch 1a ₁ of the bottom wall 1a. , and an extension wall 1h extending outward from the top wall 1g are integrally formed.

The first guide groove 1i is formed by the intermediate walls 1d, 1d', the bottom wall 1a, and the partition wall 1e, and the second guide groove 1i is formed by the intermediate walls 1d, 1d', the top wall 1g, and the partition wall 1e. guide grooves 1j are formed respectively.

2 is the same canvas as that in the conventional example described above.

Reference numeral 3 designates a clamping tool made of a U-shaped elastic plate such as a leaf spring that clamps and fixes the end portion 1a of the canvas 2 folded and wrapped around the extension wall 1h of the frame 1 to the extension wall 1h.

4 is a hexagonal bolt inserted into the second guide groove 1j of the frame 1 in a state in which the hexagonal head 4a is slidable but not rotatable; 5 is a nut screwed onto the bolt 4; It is.

Reference numeral 6 denotes a rigid extension plate bent into an L-shape, and has a hole 6a into which the bolt 4 is inserted.

Reference numeral 7 denotes a bolt that is slidable in the first guide groove 1i of the frame 1 and becomes unrotatable after being rotated within a certain range, and the head 7a is formed in the shape of a parallelogram. The width a between the long sides of the parallelogram is slightly smaller than the notch portion _1a1 , and the width b between the short sides is longer than the width of the guide groove 1i. Therefore, in order to insert the head 7a of the bolt 7 into the first guide groove 1i, the long side of the head 7a must be parallel to the notch _1a1 (imaginary line in FIG. 3). This can be done by rotating the bolt 7 approximately 90 degrees after insertion (solid line in Figure 3), and it will not come out.

8 refers to the entire top surface of the frame 1 as an upper surface portion 8.
The decorative plate covered by a has a substantially L-shaped cross section, and the side surface 8b is fixed to a screw hole 1c1 formed in the outer wall 1c of the frame ₁ with a screw 9.

Next, in the above-described configuration, a method for tensioning the canvas 2 will be explained. First, the hexagonal bolt 4 is inserted into the second guide groove 1j in alignment with the notches 2b formed at desired intervals in the canvas 2. sliding,
Insert the hexagonal bolt 4. Next, the outer peripheral end 2a of the canvas 2 is folded back to cover the extension wall 1h, and in this state, the clamping tool 3 is clamped and fixed to the extension wall 1h by sandwiching the end 2a from the upper surface of the canvas 2 (see Fig. 2a). ). As a result, the canvas 2 is stretched to a certain extent.

In this state, the hexagonal bolt 4 protruding from the notch 2b of the canvas 2 is connected to the hole 6 of the tension plate 6.
When the nut 5 is inserted and the nut 5 is tightened from above, the tip of the bent part of the tension plate 6 moves between the front wall 1b and the intermediate wall 1d, so that the bent part The canvas 2 is pulled by the tip of the curved portion. Therefore, the portion of the canvas 2 inside the front wall 1b moves, and the canvas 2 is stretched as a whole without slack.

In this way, once the canvas 2 has been stretched,
The decorative plate 8 is placed on the top surface 8a to cover the tension plate 6, and the side surface 8b is used to tighten the screws 9.
Attach to the outside wall by

Next, a structure will be described in which the frame 1, on which the canvas 2 is stretched, is attached to the frame body corresponding to the main body part a shown in FIG. 5 by the above-described attachment operation.

Reference numeral 10 is an L-shaped angle member constituting a part of the frame body, and is formed to have the same size as the frame 1 as a whole. Bolt insertion holes 10a are formed through the angle member 10 at appropriate intervals.

To attach the frame 1 to the frame configured in this way, when attaching the frame 1, insert the bolt 7 into the first guide groove 1i of the frame 1 by inserting the bolt 7 into the bolt of the angle member 10. Insertion hole 10
The number a is inserted by the method described above. Then, the inserted bolt 7 is moved within the first guide groove 1i, and the tip of the bolt 7 is inserted into the bolt insertion hole 10a. Next, this bolt insertion hole 10
The frame 1 can be fixed to the frame body by screwing the nut 11 onto the bolt 7 inserted into the hole a and tightening it.

In the above embodiment, the bolt 4 inserted into the second guide groove 1j is a hexagonal bolt, but this bolt 4 is the same as the bolt 7 inserted into the first guide groove 1i. A shaped bolt may also be used. In this case, bolts 7 are inserted in advance into each of the notches 2b formed at desired intervals in the canvas 2, and nuts 5 are provisionally screwed together through the holes 6a of the tensioning plate 6. When temporarily fastening with the clamping tool 3, align the head 7a of the bolt 7 in the direction of the second guide groove 1j, drop it into the second guide groove 1j, and then temporarily fold the end 2a of the canvas 2 with the extension wall 1h. Just fasten it. By doing this, the bolt 4 is slid over a long distance in the second guide groove 1j like when using the hexagonal bolt 4, and the bolt 4 is placed at the position of the notch 2b in the canvas 2. There is no need to fit the canvas 2 one by one, and the bolts 7 are rotated by tightening the nuts 5 and are automatically set so that they cannot rotate, so it is very easy to stretch the canvas 2.

Furthermore, in the above-mentioned embodiments, the frame 1 on which the canvas 2 is stretched is attached to the angle material 10, but the frame 1 is not attached only to the angle material 10; for example, It is also possible to attach it to the wall of a building.

In this case, attach a bracket to the wall surface in advance, insert the bolt 7 into the hole formed in the bracket, and temporarily fix it with the nut 11 with the head 7a aligned in the direction of the first guide groove 1i. .
Then, by inserting the head 7a of the bolt 7 into the first guide groove 1i of the frame 1, the frame 1 can be easily temporarily fixed to the bracket. After that, when the nut 11 is tightened, the bolt 7 is automatically set so that it cannot rotate, so the frame 1
can be firmly fixed.

Such an attachment method can also be applied to attachment of the frame 1 to the angle member 10.

[Effect of idea]

As described above, the present invention is a tension plate that is tightened by bolts inserted into the guide grooves of the frame while the outer peripheral edge of the canvas is wrapped around the extension wall of the frame and temporarily fixed with clamps. Since the canvas is tensioned by pulling it toward the outer circumference at the tip of the canvas, the canvas can be stretched quickly and reliably with simple work, and there are few parts and the structure is simple. Therefore, it has advantages such as being able to be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the canvas tensioning device for a signboard according to the present invention, Figs. a perspective view showing means for fixing the device to the frame;
FIG. 4 is a perspective view showing the attached state of the same as above, FIG. 5 is a perspective view of the conventional device, and FIG. 6 is an enlarged sectional view of the canvas fixing portion of the above. 1...Frame frame, 1b...Inner wall, 1h...
Extension wall, 1j...Guide groove, 2...Canvas, 3...
Clamping tool, 4...bolt, 5...nut, 6...stretching plate.

Claims (1)

[Claims for Utility Model Registration] A guide groove is formed through which the bolt is inserted in a slidable but non-rotatable state, and an inner wall is formed between the guide groove and the guide groove. A frame frame in which an extension wall is formed on the opposite side of the inner wall from the groove, and the extension wall is reached through the tip of the inner wall in the frame frame, and the outer peripheral edge is on the back side of the extension wall. a canvas that has been folded back; a clamp that is inserted into the extension wall via the outer periphery of the folded canvas and clamps the outer rim of the canvas between the extension wall; and a clamp that is inserted into the guide groove and that has a tip end. The threaded part of the canvas is inserted into the threaded part that protrudes through the notch of the canvas, and by screwing and tightening the nut, the tip creates a tension that pulls the canvas between the inner wall and the guide groove. A signboard canvas tensioning device characterized by comprising a mounting board and the following.