JPS623562Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a timing belt tension adjustment device used as a transmission drive device for various types of equipment.

<Background Art and its Problems> Generally, when a timing belt is used as a transmission drive device for various devices, delicate tension adjustment of the timing belt is required. Therefore, tension adjustment methods as shown in FIGS. 1 and 2 have been conventionally known.

First, in the timing belt shown in FIG. 1, one end of an open-loop timing belt 1 is held between a slider member 2 and a support plate 3, and the other end is engaged with a tension adjustment belt 4. At the same time, the slider member 2 and the support plate 5 press and hold each other. Then, the tension of the timing belt 1 is adjusted by loosening the clamping state of the other end of the timing belt 1 and pulling the adjustment belt 5 in the direction of arrow A in FIG.

However, with this method, it is difficult to maintain equal tension between one end and the other end of the timing belt 1, so it is not easy to finely adjust the tension of the timing belt 1.

In addition, the timing belt 6 shown in FIG.
are pressed and held at two points on the slider member 7 by support plates 8, 9 and screws 8A, 8B, 9A, 9B, respectively. Above screw 8
Loosen A, 8B, 9A, 9B, and use a screwdriver 10 etc. to loosen the portion 6 of the timing belt 6 between the support plates 8 and 9.
By lifting a, the tension of the timing belt 6 is adjusted. However, in this method, both side portions 6b, 6 of the belt 6
c cannot be adjusted with a uniform tensile force, and therefore it has become extremely difficult to make delicate tension adjustments to the timing belt 6.

Further, in each of the above methods, it is necessary to loosen the support plate that holds the timing belt when adjusting the timing belt, making the tension adjustment very time-consuming.

<Purpose of the invention> Therefore, the present invention was proposed in view of the above-mentioned actual situation, and the purpose is to provide a new adjustment device that can easily perform delicate tension adjustment of the timing belt. shall be.

<Summary of the invention> A slider member is provided to be movable along a running path of a timing belt and has a pair of recesses formed in a surface facing one side of the belt;
a belt support member facing the slider member with the belt in between, the belt being fixed between the support member and the pair of recesses of the slider member, and protruding into the recess through the belt to the support member; It is characterized by having a belt tension adjustment member that is assembled in a freely insertable manner.

<Example> An example of the present invention will be described below with reference to FIGS. 3 to 5.

First, Fig. 3 shows a drafting head drive mechanism that uses two timing belts to run the drafting head of an automatic drafting machine. In this drive mechanism, a driving side timing pulley 1 is attached to one end of a guide arm 11 of the drafting head.
The drive side timing pulleys 12, 13 are rotatably supported. The drive side timing pulleys 12, 13 are connected by a single shaft 14. The driven side timing pulleys 15, 16 are disposed on the other end of the guide arm 11. Two timing belts 17, 18 are wound around the timing pulleys 12, 13, 15, 16 in a closed loop shape. Slider members 19, 20 are attached to the middle of the timing belts 17, 18, respectively. The slider members 19, 20 are slidably attached to a slide shaft (not shown) and can move freely along the paths of the timing belts 17, 18. The slider members 19, 20 are slidably attached to a slide shaft (not shown) and can move freely along the paths of the timing belts 17, 18.
0 are connected by guide rods 21 and 22.

Further, a drafting head mounting member 23 is arranged and fixed in the middle of the guide rods 21 and 22, and a drafting head (not shown) is assembled and fixed to this mounting member 23. By rotationally driving the driving side timing pulleys 12 and 13 by a motor (not shown), the drafting head is moved in parallel.

Next, a tension adjusting device for the timing belts 17 and 18 will be explained with reference to FIGS. 4 and 5. Note that only one timing belt 17 will be described here, and a description of the other timing belt 17 will be omitted.

First, as shown in FIG. 4, in this tension adjustment device, the timing belt 17 is held between the slider member 19 and a belt support member 24 made of a plate. The belt support member 24 is fixed to the slider member 19 via the timing belt 17 with screws 25 and 26.

As shown in FIG. 5, the slider member 19
Concave portions 27 and 28 are formed in parallel to the running direction of the timing belt 17 on the surface facing the timing belt 17 . Note that the slider member 19 may have through holes formed therein instead of the recesses 27 and 28.

The recesses 27 and 28 of this slider member 19
Screw holes 29 and 30 are formed in the wall portion located between them. In addition, screw through holes 31 and 32 are formed in the timing belt 17 at portions facing the screw holes 29 and 30.

In addition, dish-shaped through holes 33 and 34 are formed in the belt support member 24 at positions facing the screw through holes 31 and 32 of the timing belt 17. The dish-shaped through holes 33 and 34 are provided with screws 25 and 2.
A counterbore is formed to be effective in squeezing 6. The slider member 19 is connected to the belt support member 24 via the timing belt 17.
A screw hole 35 is provided at a position facing the recesses 27 and 28.
36 are formed. Male threaded belt tension adjustment members 37 and 38 are screwed into the screw holes 35 and 36, respectively.

That is, when the tension adjustment members 37 and 38 are tightened into the screw holes 33 and 34 and projected so as to press the timing belt 7, the timing belt 17 is tightened into the tension adjustment members 37 and 38.
The recesses 27, 2 of the slider member 19 are
Pushed into 8. In this way, the timing belt 17 is pressed and bent by the recesses 27 and 28 and the tension adjustment members 37 and 38, and is thus subjected to tensile force. Therefore, by tightening and adjusting the tension adjusting members 37 and 38, the tension of the timing belt 17 can be finely adjusted. After finely adjusting the tension, the tension adjustment members 37 and 38 are tightened and fixed to the belt support member 24 with a nut or the like via a spring washer.
The tension adjustment members 37 and 38 can be firmly fixed.

According to the embodiment having the above configuration,
Since the tension on both sides 17A and 17B of the timing belt 17 can be adjusted while checking the amount of tightening from the rotation angle of the tension adjustment members 37 and 38, even delicate adjustments can be made very easily. can.

Furthermore, even when the above adjustment is not being performed, the rotation angle of the adjustment members 37 and 38 can be visually checked, so the amount of tension adjustment of the timing belt can be known at all times, which is useful for various maintenance etc. It's also convenient. Note that each of the tension adjustment members 3 in the timing belt support member 24
If a scale for tension adjustment is provided around 7 and 38, adjustment can be made even more easily.

In this embodiment, the timing belt is endless, but if it is not endless, both ends of the timing belt can be fixed by tightening screws between the slider member and the belt support member. , the tension can be adjusted in the same way as the endless timing belt.

<Effects of the invention> As described above, according to the invention, by tightening the belt tension adjustment member, the tension can be adjusted while gradually increasing or decreasing the tension of the timing belt. Tension adjustment can be performed extremely easily.

[Brief explanation of the drawing]

Fig. 1 is a front view of main parts showing a conventional example, Fig. 2 is a perspective view showing another conventional example, Fig. 3 is a schematic plan view showing a drafting head drive mechanism to which the present invention is applied, Figs. 5 shows an embodiment of the present invention, FIG. 4 is an enlarged perspective view of the main part, and FIG. 5 is an enlarged exploded perspective view of the main part. 17...Timing belt, 19...Slider member, 24...Belt support member, 27, 28...
...Recessed portion, 37, 38... Belt tension adjustment member.

Claims (1)

[Scope of utility model registration request] a slider member that is movable along a running path of a timing belt and has a pair of recesses formed on a surface facing one side of the belt;
a belt support member facing the slider member with the belt in between, the belt being fixed between the support member and the pair of recesses of the slider member, and protruding into the recess through the belt to the support member; A timing belt tension adjustment device comprising a belt tension adjustment member that is freely assembled.