JPH02173451A - Linear reciprocating motion mechanism - Google Patents

Abstract

PURPOSE:To enable a mechanism total unit to attain its cost down and miniaturization by mounting to the first reciprocating slider a pair of rotary units winding on them a tension unit and stopping its one tension side to the second slider and the other tension side to a frame. CONSTITUTION:When a cylinder mechanism 15 is operated extending, a piston rod 15b is protruded to the left from a cylinder 15a, moving the first slider 17 and sprockets 21, 22 to the left synchronously with ratio 1 to 1. Then a roller chain 23, while a left end part with its upper tension side 23b is wound into the left sprocket 21, is wound out in the right end part from the right sprocket 22, and the chain 23 is rotated to the left with a connecting metal fixture 24 serving as the center. In this way, the left sprocket 21 attains a function of moving sheave, and the upper tension side 23b of the chain 23 is moved to the left by a moving amount two times the moving amount to the left of the rod 15b in accordance with the sprockets 21, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a linear reciprocating motion mechanism that doubles the linear reciprocating momentum on the output side relative to the linear reciprocating momentum on the input side.

(Prior Art) As a conventional technology, for example, a structure shown in FIG. 5 can be considered.

That is, the fixed rack 1 and the movable rack 2 are arranged in parallel in the left-right direction, the fixed rack 1 is fixed to the frame, the movable rack 2 is supported on the frame so as to be slidable in the left-right direction, and the tooth ratio is 1. A two-stage pinion 3 is provided by integrally and coaxially connecting a small-diameter pinion 3a and a large-diameter pinion 3b, which form a pair 2, and this two-stage pinion 3 is interposed between the fixed rack 1 and the movable rack 2. , small diameter pinion 3
a to the fixed rack 1, and the large diameter pinion 3b to the movable rack 2.
mesh with.

Further, a cylinder mechanism 4 is arranged parallel to the fixed rack 1 and the movable rack 2, and the support shaft 3c of the two-stage pinion 3 is connected to the piston rod 4a of the cylinder mechanism 4.

(Problem to be Solved by the Invention) The above-mentioned conventional device has a piston rod 4 of a cylinder mechanism 4.
When the second-stage pinion 3 is moved in the left-right direction by reciprocating the pinion a, as the small-diameter pinion 3a rolls along the fixed rack 1, the movable rack 2 meshed with the large-diameter pinion 3b is moved against the piston rod 4a. However, it will be reciprocated in the left and right direction at twice the speed.

However, since the above-mentioned device uses a rack and pinion, it is labor-intensive and expensive to process, and it is difficult to miniaturize the device.

The object of the present invention is to obtain a novel linear reciprocating mechanism that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

That is, as shown in FIG. 1, the cylinder mechanism 5, the first slider 6, and the second slider 7 are arranged in parallel,
The cylinder 5a of the cylinder mechanism 5 is locked to the frame 8,
The first slider 6 and the second slider 7 are slidably supported on a frame 8, the first slider 6 is connected to the piston rod 5b of the cylinder mechanism 5, and a pair of sliders are provided at both ends of the first slider 6 in the sliding direction. Rotating bodies 9 and 10 are rotatably supported, and an endless tension body 11 is wound around each rotating body 9 and 1o,
The second slider 7
The other tension side 11b of the tension body 11 is connected to the frame 8 in the middle.

(Function) Since the present invention has the above configuration, when the piston rod 5b of the cylinder mechanism 5 is reciprocated, the first slider 6 is reciprocated in a one-to-one ratio by the piston rod 5b, and at the same time, the rotating body 9 and 10 is reciprocated by the first slider 6 in synchronization with this.

When the rotating bodies 9 and 10 reciprocate, the tension body 11 has the other tension side 11b locked in the middle to the frame 8, so the front end side (lla-1) of one tension side 11a is on the forward side. While being caught up in the rotating body (9) of the rear end side (ll
a-2) is unwound from the rotating body 10 on the anti-forward movement side.

As a result, the rotating bodies 9 and 10 on the advancing side (
9) functions as a movable pulley, and one tensioned side 11a of the tension body 11 reciprocates in the linear direction with an amount of movement L2 that is twice the amount of movement L1 of the rotating bodies 9 and 10 in the linear direction. will be moved.

” - When one tension side 11a of the ticket tension body 11 moves back and forth,
The second slider 7 connected to the middle of the one tension side 11a
is reciprocated in synchronization with one of the tension sides 11a.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, FIG. 2 is a partially sectional plan view showing an embodiment of the present invention, FIG. 3 is a front view thereof, and FIG. 4 is a view taken along IV-I of FIG.
It is a partial cross-sectional side view corresponding to V.

In FIGS. 2 to 4, 15 is a cylinder mechanism consisting of an air cylinder, and this cylinder mechanism 15 is arranged to extend in the left-right direction in FIG. 2, and its cylinder 15a is fixedly supported by a frame (not shown). The piston rod 15b is made retractable toward the left.

A pair of first rules 16 are fixed to the front side of the cylinder 15a by extending in the longitudinal direction thereof, and a first slider 17 made of a plate material can be slid on the first rules 16 in the left and right directions in FIG. Insert into.

The first slider 17 has its left end connected to the left end of the piston rod 15b by a bracket 18 in FIG.
20 is fixed so as to protrude in the front direction, and each of these shafts 19 and
Sprockets 21 and 22 forming rotating bodies are rotatably attached to 20.

An endless roller chain 23 forming a tension body is wound around each of the sprockets 21 and 22.
As shown in FIG. 4, the left end of the lower tension side 23a is connected to the cylinder 15a by a connecting tool 24.

Further, a square tubular second tube is provided above the front side of the cylinder 15a.
A rail 25 is arranged to extend in the longitudinal direction and is integrally connected to the cylinder by a support 26.

A second slider 27 made of a rectangular tube is fitted into the second rail 25 so as to be slidable in the left-right direction in FIG. This second slider 27 has a connecting pin 28 hanging down and fixed on its lower surface, and this connecting pin 28 is made to protrude downward from a slit formed extending in the longitudinal direction on the lower surface of the second rail 25.
Its lower end is connected to the middle of the tension side 23b on the upper side of the roller chain 23 by a connecting tool 29 (FIG. 4). In addition,
In FIG. 4, 30 is a bearing.

As shown in FIGS. 2 and 3, the second slider 27 has a locking mechanism 3 at its left end that locks the conveyed object.
Install 1.

This locking mechanism 31 connects a prismatic holder 32 to the left end of the second slider 27, and connects a pull hook 33 and a push hook 34 to the left and right parts of the holder 32 with pins 33a.
34a, and each pull hook 33 and push hook 34 are made swingable in a direction perpendicular to the longitudinal direction of the holder 32 and in a direction facing each other, and the pull hook 33 is connected to a coil The push hook 34 is elastically biased by the spring 33b so as to swing in a direction perpendicular to the longitudinal direction of the holder 32 by the coil spring 34b.

Next, the operation mode of the above embodiment will be explained.

First, when the cylinder mechanism 15 is extended, the piston rod 15b protrudes to the left from the cylinder 15a in FIG. It will be moved towards

When the sprockets 21 and 22 move to the left, the roller chain 23 wound around them rotates as follows.

That is, since the left end of the lower tension side 23a of the roller chain 23 is locked to the cylinder 5a by the connector 24, the left end of the upper tension side 23b is wound around the left sprocket 21. As the roller chain 23 rotates, its right end portion is unwound from the right sprockets 1 to 22, and the roller chain 23 rotates to the left about the connector 24.

As a result, the left sprocket 21 functions as a movable pulley, and the upper tension side 23b of the roller chain 23 corresponds to the amount of leftward movement of the sprockets 1-21, 22 and therefore the piston rod 15b. It will be moved to the left by twice the amount of movement.

Then, when the upper tension side 23b moves to the left, the second slider 27 moves through the connector 29 to the upper tension side 23b.
will be moved to the left.

Furthermore, when the second slider 27 extends and moves toward the left, the push hook 34 engages with the object to be conveyed and presses it toward the left.

Next, when the cylinder mechanism 15 is shortened, the piston rod 15b moves to the right, and accordingly, the first slider 17 and the sprockets 21 and 22 are moved to the right in one-to-one synchronization. become.

When the sprockets 21 and 22 move to the right, the left end of the upper tension side 23b is unwound from the left sprocket 21, and its right end is wound around the right sprocket 22, contrary to the above, and the roller The chain 23 is the connector 2
It will rotate to the right around 4.

As a result, the right sprockets 1 to 22 function as movable pulleys, and the upper tension side 23b of the roller chain 23 moves twice as much as the rightward movement of the screw 1-in rod 15b. Moved to the right by the amount of movement, the second slider 2
7 is moved to the right via the connector 29.

Further, when the second slider 27 moves for shortening toward the right, the pull hook 33 engages with the object to be conveyed and moves it to the right.

Note that the sprockets 21 and 22 and roller chain 23 described above may be replaced with pulleys and belts.

(Effects of the Invention) As is clear from the above description, the present invention has a first slider that is reciprocated by a cylinder mechanism, and a pair of rotating bodies around which a tensioning body is wound. the second
Since it is locked to the slider and the other tension side is locked to the frame, a commercially available sprocket or pulley can be used as the rotating body, and a commercially available roller chain or belt can be used as the tensioning body. , the effect can be obtained at low cost.

Moreover, each part becomes easier to assemble, and the entire mechanism can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view showing the principle of the present invention, Fig. 2 is a partially sectional plan view showing an embodiment of the invention, Fig. 3 is a front view thereof, and Fig. 4 is the IV of Fig. 3. It is a partial cross-sectional side view corresponding to -IV. 5 Niji cylinder mechanism, 5a Niji cylinder, 5b: Piston rod, 6: First slider, 7: Second slider, 8: Frame, 9 and 10: Rotating body, 11: Tension body, 11a one tension side, 11b = other side Zhangbian. Issuing agent Hisashi Matsumoto Procedure correction band

Claims (1)

[Claims] 1. A cylinder mechanism, a first slider, and a second slider are arranged in parallel, the cylinder of the cylinder mechanism is locked to the frame, the first slider and the second slider are slidably supported by the frame, and the cylinder mechanism A first slider is connected to a piston rod, a pair of rotating bodies are rotatably supported at both ends of the first slider in the sliding direction, and an endless tensioning body is wound around each rotating body. A linear reciprocating mechanism characterized in that the middle of the tensioned side is connected to a second slider, and the middle of the other tensioned side of the tension body is locked to a frame.