JPS6346760Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to devices that reciprocate between two positions, such as reciprocating tables and article transfers, and uses a general-purpose cylinder to perform double stroke motion smoothly and with high stop position accuracy.

Conventional technology This type of conventional technology includes, for example,
No. 42565, which uses a general-purpose cylinder to perform double stroke motion.

However, in this device, two positions are determined by moving the cylinder forward and backward, so the accuracy of the stopping position is extremely poor.

Therefore, it is conceivable to restrict the stop position with a stopper, but even if the bracket is applied to the stopper, the accuracy of the stop position of the slide member can only be improved to some extent because the connection band is used.

Also, although the guide bar and cylinder are installed parallel to each other, it is difficult to make the piston rod and guide bar completely parallel, especially when using a general-purpose cylinder. There are many.

Purpose of the invention The purpose is to use a general-purpose cylinder to perform double stroke motion with smooth operation and high accuracy in stopping position.

Configuration Both ends of a guide bar are fixed to a frame body, and this guide bar guides two plates spaced at a regular interval, and also guides a sliding body between the two plates.

The tip of a piston rod of a cylinder, whose rear end is rotatably supported on a frame and can be moved a small amount in the direction of a support axis, is connected to a plate at the front as seen from the cylinder side so as to be movable in a plane perpendicular to the axis.

The cylinder body or the cylinder side fixing member and the slide body are connected by a chain or a belt via sprockets or pulleys supported on a plate, respectively.

A stopper is fixed to the frame body, passing through the notch of the plate and coming into contact with the slide body.

With this configuration, since the stopper directly contacts the slide body, the stopping position accuracy is high, and since the cylinder, the frame body, and the plate are movably connected to each other, smooth operation can be performed.

Embodiment Two parallel guide bars 2,2 are fixed to a bracket (frame body) 1,1.

Two pilot plates 3, 4 and a slide body 5 between them are guided and supported by the guide bars 2, 2 so as to be movable in the axial direction.

The two pilot plates 3, 4 are connected by three connecting rods 21, 21, 21 at constant intervals.

This connection is adjustable by threaded portions 22 and nuts 23, 23 at both ends of the connecting rod 21, and this interval is longer than the displacement stroke of the cylinder rod 61, which will be described later.

A clevis 13 is fixed to one of the brackets 1, and a hole in a support portion 64 of the cylinder 6 is fitted into the support shaft 14, so that the cylinder 6 can be freely rotated.
It is supported so that it can move in any direction. (As shown in Figure 5,
The width of the support portion 64 is made thinner than the groove of the clevis 13, and it is movable by this distance. ) A thread is cut at the tip of the piston rod 61 of the cylinder 6, into which a nut part 62 is screwed, and a cap 63 that fixes the nut part 62 to the pilot plate 3 supports the piston rod 61 and the pilot plate 3 to prevent it from coming off. are connected.

In order to allow the cap 63 to move freely in the plane direction of the pilot plate 3 (in the plane perpendicular to the axis) relative to the nut part 62, the diameter of the hole in the cap 63 is made slightly larger than the diameter of the tip of the nut part 63. .

Therefore, the cylinder 6 is substantially parallel to the guide bar 2.

Each of the pilot plates 3 and 4 has a hole 3 through which a stopper 11, 12 screwed onto the bracket 1 and fixed with a nut can freely pass through.
1 and 41 are open, and sprockets 34 and 44 are rotatably supported via sleeves 35 and 45 on support shafts 32 and 42 which are fixed with screws 33 and 43 to prevent rotation.

Hooks 52 and 6 are attached to the slide body 5 and the cylinder 6.
5 is fixed, and both ends of chains 71 and 72, which are hung between the respective hooks and the sprockets 34 and 44, are fixed.

The slide body 5 is provided with apertures 51, 51 on both sides that contact the stoppers 11, 12.

In operation, when the cylinder 6 is driven, the pilot plates 3 and 4 move by the stroke of the piston rod 61.

On the other hand, the slide body 5 via the chains 71, 72 and sprockets 34, 44 moves twice the above stroke.

Then, the slide body 5 stops each time 51 hits one of the stoppers 11 or 12.

Therefore, the stopping position becomes highly accurate.

Also, due to variations in the cylinder 6, it is difficult for the piston rod 61 and the guide bar 2 to be perfectly parallel, but since the cylinder 6 and the rod 61 are movable and connected to each other, they are automatically corrected to follow the movement of the plate, making it smooth. It operates smoothly and does not cause any twisting.

Modification Example In the above example, the chain and sprocket were connected, but it is also possible to connect the timing belt and pulley.

Also, although a hole is provided as a cutout, a notch may also be used.

Effects As mentioned above, since the slide body is directly stopped by the stopper, the stopping accuracy is high.

Even if a general-purpose cylinder is used, it operates smoothly without twisting.

Furthermore, since the slide body moves twice as many strokes relative to the cylinder, the contact load with the stopper is half that of when the stopper is applied to the pilot plate, and the stopper is also less likely to break, which is advantageous in terms of wear.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a plan view thereof, Figs. 3 and 4 are front views of the pilot plate, Fig. 5 is a partially enlarged view of Fig. 2, and 1 is a bracket. , 2 is a guide bar, 3 and 4 are pilot plates, 5 is a slide body, 6 is a cylinder, and 71 and 72 are chains.

Claims (1)

[Claims for Utility Model Registration] A guide bar fixed to a frame, two plates guided by the guide bar and movable in the axial direction, and a connecting member fixed at both ends to the plates to keep the interval between the plates constant. A slide body guided by a guide bar between the plates and movable in the axial direction; a cylinder supported parallel to the guide bar and having a piston rod connected to the preceding plate; and a pulley or sprocket rotatably supported by each plate. In a device consisting of a connecting band whose ends are fixed between a cylinder or a connecting member and a slide body, and whose intermediate ends extend around a pulley or sprocket, stoppers that contact the slide body are fixed to the frames on both sides, and both ends are fixed between the cylinder or the connecting member and the slide body. The plate is formed with a ridged portion through which the stopper passes, the piston rod is connected to the plate by a connecting means that is movable in a plane perpendicular to the axis, and the cylinder is connected to the frame by a connecting means that is rotatable and movable in a direction perpendicular to the axis. Combined double stroke device.