JPS588861A - Oval crank device - Google Patents

Abstract

PURPOSE:To make it possible to convert rotary motion into long stroke reciprocating motion with a compact construction and to obtain a quick return function, by winding a winding member around two rotary bodies and by connecting a slider to the winding member at the one side thereof through an intermediate rotary member. CONSTITUTION:When an intermediate shaft 6 is rotated by a drive source through a clutch and brake device 22, a sprocket 10 secured to the intermediate shaft 6, and therefore, a chain 11 wound around sprockets 7, 9 on both sides of the sprocket 10, travels through the latter. Then, a slider 16 is slid along a guide groove 15 through a connecting plate 13 connected to the chain 11 at several positions thereof. The slider 16 reciprocates to a long stroke (s) corresponding to the sum of a distance 9 between the shafts 3, 5 of both sprockets 7, 9 and the diameter (d) of the sprocket 7. Further, since the chain 11 has a travel distance longer at one side 11a than that at the other side 11b, the slider 16 is slowly fed but quickly returned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for converting rotational motion into reciprocating motion, and more particularly to an oblong takunta device that uses a body to wrap around a chain or the like.

Conventionally, crank equipment companies installed a crank bin eccentrically with respect to the shaft, and the rotation of the crank bin gave reciprocating motion to the sliders. Therefore, the reciprocating motion of the slider is only 0.2 times the eccentricity of the crank bin, and if you try to increase the reciprocating motion, the bin eccentricity must be set large, and the relatively long When applied to something that requires a stroke, the device becomes extremely large, creating difficulties in terms of installation space, etc.

In addition, in article conveyance devices, it is desired to increase the speed by using a rational motion curve and shorten the conveyance tact by using a quick return mechanism. However, large acceleration occurs at the start and stop of feeding,
In addition to being difficult to increase the speed, the interposition of a quick return mechanism would make the mechanism extremely complex) and expensive.

Therefore, in the present invention, an endless winding body is wound around two single rolling bodies, and an intermediate rolling body is rolled into contact with one side of the body. The object of the present invention is to provide an oval crank device which is constructed by connecting a slider to a KlII main body, thereby eliminating the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to Figure 1 and Figure 5.

As shown in Figs. 1 to 3, the oval crank device 1 has a main body case 2.
The book support shaft 3.5 is rotatably supported, and the intermediate shaft 6 is slightly above the straight line XX at approximately the middle section of the straight line XX connecting the support shafts 3.5. is supported. Two sprockets with the same diameter are supported on the two support shafts 3 and 5 with a slight spacing between them, and further on the intermediate shaft 6. Similarly, two sprockets )10 and 10 are fixed and supported. And, on the left and right support sprocket) 7.9, there is an endless roller chain TL, 11 of the same hitch and length! 11m on one side of these chains 11
The intermediate sprocket 10 is in rolling contact with these two sprockets.
A connecting plate 13 is clamped and connected to a predetermined location of the book chain 11 by a long bottle 12. Follow me, chain 1
1 has an intermediate sprocket f) I on one side 11a.
GK, the sprocket at both ends bends greatly inward from the common tangent of ) 7.9, and the chain 110 travel distance (11m) is significantly longer than the other side 11b which is straight. ing. On the other hand, the main body case 2 is extended in one direction, and there are guide grooves 15° on both sides, as shown in detail in FIG. 15 is formed. And these guide grooves 1
A slider 16 is slidably supported on the slider 16, and the connecting plate 13 is connected to the slider 16 by means of a bottle 17.
The other end is connected and led out of the case 2 through a bin 19 or the like and connected to an article conveyance device such as a feeder. In front, a sub-case 20 is placed and fixed on the upper part of the main body case 20, and a motor 21 and a brake device 22 are installed in the sub-case 20. Further, the output shaft of the device 22 is connected to an enlarging gear 23, and the gear 23 meshes with a large gear 25 connected and fixed to the intermediate shaft 6. In addition, as detailed in Figure 2, the support shaft 5 is attached to the main body case 2KmllIll
It is supported by sliders 26 and 26 which are freely guided, and furthermore, the slider 26 is freely adjustable along the sides 2 and 27 to adjust and absorb the slack caused by the elongation of the chain 11. be able to.

Since this embodiment has the above configuration, the motor 21
The rotation of the brake device 22 and the gears 23, 2
5 to the intermediate shaft 6, and further rotates the sprocket 10 fixed to the intermediate shaft 6, so that both sprockets,
) 7.9 drives and runs the chain 11 wrapped around it. Then, the slider 16 is slid along the guide groove 15 via the connecting plate 13 connected to the chain IIK, and the slider 16 moves in one direction of the chain 11. Furthermore, at this time, the travel distance of the chain 111 on one side is largely bent inward by the sprocket 10, and is much longer than the other chain 1111b, which is straight, so as shown in Fig. 5. As shown in , the slider 16 has a slow speed in the feed stroke corresponding to one side 111 of the chain 11, and is moderately fast in the return stroke 11 corresponding to the other side 11b of the chain 11, so that the slider 16 has a slow speed compared to the feed stroke taK. Return 9
If the time t-line is continuous with a smooth line, it is unlikely that a large acceleration will occur. When the clutch/brake device 22 is operated, the upper elongated connecting pin 12 of the chain 110 forms an ellipse at a point located on the straight line Crank device 1a stops.

Next, an embodiment partially modified based on FIG. 6 will be described. In this embodiment, the sprocket ( ) 100 shaft 6 is supported by a slider 30 that can slide in the vertical direction, and an adjustment port 31 is screwed to the wrinkle slider 30 to form the slider 30. Therefore, the sprocket 10 can be adjusted in the vertical direction, that is, the bending amount of the chain 11 can be adjusted.

Also, both sprockets,) 7.9 axis 3.5 ton horizontal gangway KIF
It is supported by movable sliders 32 and 26, and furthermore, a spring s with the same elastic force
s and ss are biased in the direction of moving away from each other.

In addition, the intermediate sprocket is driven via a chain or belt, and is constructed in such a way that it can also be driven by the vertical movement of the mosquito sprocket (1G).

Therefore, when the adjustment melt 31 is adjusted to adjust the sprocket 10 up or down, the amount of wear on the chain side 11m is adjusted, which in turn adjusts the traveling distance of the chain in the forward direction of the slider 16. The speed and transfer time tI are adjusted. At this time, the change in the tension of the chain 11 due to the movement of the sprocket y) 10 is absorbed by the movement of both sprockets y) 7 and 9 by the same amount.

Furthermore, in this embodiment, one of the sprockets to@s is supported by a slider 26 that can slide in the lateral direction, and a gorge slider 26KmIm111#rut35 is further explained based on FIG. 3. Hold the book in the horizontal direction, that is, on both spout support shafts. ! It is possible to adjust the distance 1 between the axes of I.

Also, connect the intermediate sprocket 2, 10O shaft 6 to the slider 3G.
) and further supports the slider 30 with a spring 36.
It is biased in the direction of applying tension to the chain 11. In addition, on the Isami flow side, it is desirable that the shaft 5 of the other meproke and door be connected to the motor 21 and driven.

Therefore, when the sprocket 9 is adjusted in the lateral direction by adjusting the adjustment melt 35, the distance 2 between the support shafts 3.5 is adjusted, and the stroke S of the slider 16 is adjusted. At this time, the change in the tension of the chain 11 due to the movement of the sprocket 90 is absorbed by the intermediate sprocket 10.

In addition, in the above embodiment, the chain 11 and sprocket) 7
,9. Although it is constructed as IOK, other rotating bodies such as belts and pulleys and the windings are constructed on the body to completely eliminate the pulsation associated with the chain link. Connect slider 16 with @13,
It is also possible to connect by other means such as Scotch yam. First, the intermediate rotary body 10 may be configured so that the IIk hook is rotated around the body 11 from the inside, and the body 11 is widened to the outside, and in this case, the slider 16 is the eighth Draw a movement set as shown in the figure. Furthermore, in the above embodiment, *
*The side 11m of the cage body 11 where the intermediate rotary body 10 is in rolling contact was designated as the forward stroke, and the other side 11b was designated as the return>stroke, but this was reversed, and the - side 11m was designated as the return> row, and the other side 11m was designated as the return>stroke. It is also possible to set the side 11b in the forward direction, to obtain a longer return time tm than the forward time, and to lengthen the working time during the stop period based on the delayed return time tsK.

As described above, according to the present invention, the endless winding wraps the body 11 around the two rotating bodies 7 and 9, and the winding rotates the intermediate rotating body 10 on one side 11aK of the body 11. In contact, the wrapper bends the side of the body, j! Slider 16 on the body
Since it is configured by connecting the two, it is possible to obtain a long stroke with a compact configuration.
A rational crawler that prevents the slack of the T-body - no large surface acceleration occurs on the line, and has a predetermined fast return function or slow return function despite having an extremely simple configuration. be able to. Therefore, when the oval crank device 1 is used in an article conveying device such as a feeder, it is possible to increase the speed and reduce the conveyance tact.
It is possible to shorten the time and improve efficiency. Furthermore, by configuring the intermediate rotary body 1G to be freely adjustable K111 in the vertical direction, the feed speed and feed time of the slider 16 can be freely adjusted, and the By configuring either one of them to be adjustable in the lateral direction, the stroke S of the slider 16 can be freely adjusted.

[Brief explanation of drawings]

FIG. 1 is a front view showing an oval crank device according to the present invention;
Figure 2 is a plan view, Figure 3 is a side view, Figure 4 is a sectional view taken along line 11 in Figure 2, and Figure 5 is the movement of the slider 1.
FIGS. 6 and 7 are front views showing different embodiments, and FIG. 8 is a diagram showing one movement of the slider according to another embodiment. 1-...Oval two-link device, 7, 11-11 inverted body (
Sprocket, )) N 10...Intermediate rotating body (sprocket), 11...Wrap body (chain)
, lla...- side, 16...Slider applicant Daido Kogyo Co., Ltd. agent ok'' E゛1

Claims (1)

[Claims] ■ An endless emit body is wrapped around two rotating bodies, making it possible to create 9 wrinkles! Kake is made by connecting an intermediate rotating body to one side of the body.
It is a tomo-elbow crank device, which is constructed by connecting the slider to the body of the kakikake. (2) The oblong two-interface device according to claim 1, wherein the intermediate-rolling member is configured to be vertically adjustable. (3) The oval crank device according to claim 1, wherein either one of the two O11 rolling bodies is configured to be adjustable in the lateral direction.