JPH0543308Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a terminal attachment device for a toothed belt with an end. This invention relates to an end attachment device for an end toothed belt that facilitates attachment to a pulley.

(Prior Art) In general, a toothed belt is an endless belt that is suspended between a driving pulley and a driven pulley and is continuously rotated to transmit power from the driving side to the driven side. As known, in recent years, as belts have become longer, the development of belts with toothed ends has progressed, and cases of timing transmission in which a single belt is used exclusively for reciprocating motion are increasing.

Note that in some cases, an endless belt may be cut to an appropriate length and used.

In order to suspend such an end-toothed belt between a pair of drive-side and driven-side pulleys and perform reciprocating motion, it is necessary to connect and fix both ends of the end-toothed belt. As a fixing device, for example, as shown in Japanese Utility Model Application Publication No. 61-82153, a belt holder having teeth at both ends of the belt is attached so that the teeth mesh with the teeth of the belt, and a belt holder is attached between the other sides of both ends of the belt. There is a device that clamps the belt by providing a back plate and tightening the back plate and a belt holder, or a device that holds the timing belt between the holder plate and the connecting metal fittings, and places the uneven surface of the timing belt on the inner surface of the holding plate or the connecting metal fittings. A device that forms concavities and convexities that fit into concave and convex parts (Special Publication 1983
-34695) or with joints made of metal or hard synthetic resin (Japanese Unexamined Patent Application Publication No. 59/1983).
93548) have been proposed.

(Problem to be solved by the invention) However, in the above-mentioned mounting structure, although there is an advantage of uneven fitting, the connecting member consisting of the belt holder, back plate, etc. and both ends of the belt body are connected by screws. It takes time to install because it is fixed with screws, etc., and because the screws are used in the center, when a large tension is applied, the ends of the belt holder lift up, making it easy for the belt to come off. There are problems such as the length of the In addition, products with joints made of metal or hard synthetic resin are formed by pouring molten metal or hard synthetic resin, so although an increase in strength can be expected, the work is complicated, and the work is complicated. There is a problem in that it takes time to solidify.

In order to cope with and improve the above-mentioned actual situation, the present invention attaches upper and lower members having an inner surface shape that is approximately the same as the belt shape to the connecting portion of the toothed belt with ends as described above. By fitting and caulking a pair of frame-shaped fasteners on both sides of the member, there is no need to melt and solidify screws or metal as in the conventional methods, and installation is easy.Moreover, both ends of the belt can be easily attached by fitting the concave and convex parts. It is an object of the present invention to provide a simple belt end attachment structure that can reliably prevent separation from the belt end.

(Means for Solving the Problems) That is, the belt end attaching device of the present invention that achieves the above object is characterized in that the end portion of the belt having teeth at least on the inner circumferential surface of the belt is Attach an upper mold and a lower mold that have substantially the same inner surface shape to fit with the plurality of teeth of the mold, and extend it over the convex parts formed on both sides of the upper mold and the lower mold to form a pair of frame-shaped parts. The belt is attached by fitting and caulking the locking tools on both sides facing each other.

Here, the upper mold and the lower mold are usually provided with convex portions on both sides to which locking plates forming locking tools are attached, and after the locking tools are fitted, these are caulked with a bench or the like.

The upper mold, the lower mold, and the locking plate are made of metal, and are made by sintering, aluminum-zinc die-casting mass production method, cutting of steel plate, forging, etc. In particular, the locking plate may be a thin steel plate, and can be made by pressing. It can be produced inexpensively by punching, etc.

(Function) The mounting device of the present invention having the above-mentioned configuration, for example, places both ends of the toothed belt with ends facing each other on the lower mold, covers the upper mold, and then attaches the two ends of the belt with the upper and lower molds. pinch the part.

Then, the frame-shaped locking tools are fitted over the convex parts formed on both sides of the upper and lower molds,
Connect and secure both ends of the toothed belt by caulking with pliers, etc. in several places, such as the convex parts on both sides of the upper and lower molds.

In this way, the ends of the belt can be connected and fixed very easily.

In addition, although the above is the installation of both ends of the belt with ends, the ends of the toothed belt may be separately fixed with the above-mentioned upper die, lower die, and fixtures consisting of the locking device. In this case, is used for lightweight automatic doors as shown in FIG.

Note that in this case, the toothed belt itself does not move.

Thus, it can be appropriately used for connecting and attaching the ends of a reciprocating toothed belt of an automatic door, or as an attachment device for an opening/closing belt of an automatic door, although the toothed belt itself does not move.

(Embodiments) Hereinafter, embodiments of the present invention will be described with further reference to the accompanying drawings.

Figures 1 and 2 show one of the mounting devices according to the present invention.
This is an example, and shows a case where both ends of an end toothed belt are connected.

In the figure, 1 is an upper mold, 2 is a lower mold, and the features of the present invention are defined by the upper mold 1, the lower mold 2, and a locking device 4 consisting of a pair of forehead-shaped locking plates arranged oppositely on both sides. The upper die 1 and the lower die 2 are provided with protrusions 6 and 7 on both sides in the belt width direction, which are integrated with the upper die and the lower die, respectively, and teeth on the inner circumferential side. Both ends of the tensile rope-embedded toothed belt 3 having a tensile strength rope embedded in the belt 3 are held between the upper mold 1 and the lower mold 2 of the above-mentioned mounting device so as to abut against each other, and a pair of tab-like hooks are used to connect and fix the belt both ends. A stopper 4 is attached on both sides to extend around the outer periphery of the convex portions 6, 7.

In the illustrated embodiment, the upper mold 1, the lower mold 2, and the locking tool 4 are all made of metal, and the belt clamping surface of the upper mold 1 is a flat surface, and the belt clamping surface of the lower mold 2 is a toothed belt. It has an uneven shape that fits into the tooth portion 5 of No. 3.

Therefore, when installing the above-mentioned mounting device, both ends of the toothed belt 3 are placed on the lower mold 2, the upper mold 1 is placed on the upper mold 1, and the upper mold 1 is placed in a vise, vice, etc. When the upper surface 8 and the lower surface 9 of the lower mold 2 are sandwiched, the toothed belt 3 is compressed because it is made of an elastic material such as rubber or urethane.
Then, by caulking the convex portions 6, 7 on both sides of the upper mold 1 and the lower mold 2 at several places using pliers or the like, both ends of the toothed belt can be connected and fixed.

In addition, although the inserted positions of both ends of the toothed belt 3 are in a butt state in the above example, it is not necessarily necessary to butt each other, and one tooth or an appropriate tooth may be left open.In short, the belts at both ends are It may be inserted so that at least two or more teeth mesh with each other.

Further, the dimensions of the tooth profile of the lower mold 2 should be such that when the belt 3 is inserted, there will be a gap between the tip and root of the teeth at the boundary between the belt 3 and the lower mold 2. That is, by making the height of the unevenness of the uneven shape of the lower die 2 slightly smaller than the unevenness height of the belt, the belt is compressed when pinching, and the belt is more securely fitted, and the recessed part of the toothed belt is Damage to the toothed belt is reduced by reducing the applied force.

FIG. 3 shows a modification of FIGS. 1 and 2 in which a double toothed belt having teeth 5 on both the upper and lower sides is used as the toothed belt 3' with both ends connected and fixed.

In this case, the belt clamping surfaces of both the upper die 1 and the lower die 2 are formed with an uneven inner surface shape to fit with the teeth 5 of the belt.

On the other hand, FIGS. 4 and 5 show the case where both ends of the double toothed belt 3' as described above are fixed separately by the above-mentioned attachment device 14 without being connected. Such use is usually shown in FIG. Lightweight automatic door like 1
used in 2.

However, in this case, as shown in the figure, the double toothed belt 3 itself does not move.
The door 12 is moved by a drive pulley 13.

In addition, in FIG. 4, as mentioned above, when the belt is inserted, when it is caught between the teeth 5 of the belt 3 and the clamping surfaces of the upper die 1 and the lower die 2, that is, between the tooth tip and the tooth base,
A gap 10 is formed so that the belt is compressed to ensure secure fitting, and to reduce the force applied to the recess of the toothed belt to reduce damage to the toothed belt.
11 are provided.

Thus, with the above configuration, the attachment device can be attached to the end of the belt extremely easily, and the attachment device and the toothed belt can be connected easily and reliably.

(Effects of the invention) As described above, the present invention provides an inner surface having approximately the same shape that fits with the teeth of the plurality of tensile members of the outer belt at least at the end of the end belt having teeth on the inner circumferential side of the belt. The belt is attached by attaching an upper mold and a lower mold, and fitting a pair of forehead-shaped fasteners into the convex parts provided on both sides of the upper mold and lower mold, and attaching the belt by caulking. It is extremely easy to use, just by clamping the upper and lower molds together, and fitting and caulking the bulletin board, and it can be installed in a short time without requiring screws or joints of metal or hard synthetic resin, as was the case with previous devices. In addition, the clamping by both the upper and lower molds and the caulking clamping by the locking tool are strong, the connection between the mounting device and the belt is reliable, and the reciprocating motion by the toothed belt can be maintained stably and for a long time. It has a great effect.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one example of the mounting device according to the present invention, Fig. 2 is a cross-sectional view of the same device in the belt width direction, Fig. 3 and Fig. 4 are side views showing other embodiments of the same device, and Fig. 5 is a schematic diagram showing one example of use. 1 ... upper die, 2 ... lower die, 3 ... toothed belt,
4: Frame-shaped fastener, 5: Belt teeth, 6:
...upper die convex portion, 7...lower die convex portion.

Claims (1)

[Scope of utility model registration request] An upper die and a lower die having substantially the same inner shape that fit with the plurality of teeth of the belt are attached to the end of the belt having teeth at least on the inner circumferential side of the belt. The ends of the belt are held between the molds, and convex portions are integrally formed on both sides of the upper and lower molds, and a pair of forehead-shaped locks are formed on both sides facing each other across the outer peripheries of the upper and lower convex portions. A terminal attachment device for a toothed belt with an end, characterized in that the belt is attached by fitting a tool and caulking the belt.