JPH0710511U - Slide unit with built-in shock absorbing mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a slide unit having a built-in shock absorbing mechanism. [Structure] A rod 16a airtightly inserted into the body 11,
The ends of 16b are placed outside the body so that plates 20a, 20
mounted on b, on both sides of piston 17 of these rods,
Covers 25a, 25b and 26a, 26b are provided so as to be slidable relative to the rod and the body, and these covers are integrally movable by connecting pipes 24a, 24b that are hermetically sealed by a piston. The shock absorbing springs 36, 36 are provided between 26b and the cylinder end. At the end of the stroke of the body 11, the cover slidable relative to the body compresses the shock absorbing springs 36, 36, and the body stops at the end of the stroke as a buffer. [Effect] The work member can be directly attached to the body to reduce the eccentric force acting on the slide unit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slide unit driven by fluid pressure.

[0002]

[Prior art]

 A plurality of pistons each including a body having a plurality of cylinders arranged in parallel, a piston and a rod slidably inserted in each cylinder, and a pair of plates connecting the rods outside the body are provided. A slide unit for supplying / discharging a pressure fluid to / from a pair of pressure chambers partitioned by to relatively move a body and a pair of plates is already known. FIG. 3 shows an example of an adsorption device that adsorbs the work 2 by the above-mentioned known slide unit 1. The slide unit 1 in this suction device has a pair of plates 5 and 5 attached to both ends of rods 4 and 4 (only one of which is shown) penetrating the body 3, and these plates 5 and 5 are fixed to appropriate members. Then, the pressure fluid is supplied to and discharged from the pair of pressure chambers defined by the pistons provided on each rod 4, and the body 3 and the working member 6 are moved up and down in the figure. A vacuum pressure is applied to the tip of the working member 6. Is attached to the suction pad 7 where

The suction device sucks the work 2 by the vacuum pressure acting on the suction pad 7. The slide unit 1 that has sucked the work 2 is moved by an appropriate means (not shown) to 2 is conveyed to a desired position. However, since the work 2 sucked by the slide unit 1 has a different size, the suction pad 7 may collide with the work 2 at the end of the stroke of the slide unit 1 depending on the size of the work 2. is there. For this reason, in the above suction device, the adapter plate 8 is attached to the body 3, the working member 6 is movably attached to the adapter plate 8, and a shock absorbing buffer for cushioning is provided between the adapter plate 8 and the working member 6. A spring 9 is provided. In this suction device, when the suction pad 7 comes into contact with the work 2 near the end of the downward stroke, the body 3 compresses the shock absorbing spring 9 and makes a stroke. The shock at the end of the stroke can be buffered. However, if the adapter 8 is provided between the body 3 and the working member 6, the distance between the body 3 and the working member 6 becomes large, so that the eccentric force acting on the slide unit 1 becomes large, which is not preferable. Therefore, there is a demand for a slide unit that has a buffer mechanism and can directly attach a working member.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide a slide unit having a built-in cushioning mechanism.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a slide unit having a built-in shock absorbing mechanism of the present invention includes a body having a plurality of cylinders arranged in parallel, a piston and a rod slidably inserted in each cylinder, and an outer body of the body. In a slide unit including a pair of plates connecting these rods in one direction, the pressure fluid is supplied to and discharged from a pair of pressure chambers defined by the plurality of pistons, and the body and the pair of plates are relatively moved, Covers are provided on both axial sides of the piston so as to be movable relative to the rod and the body, and these covers are integrally movable by connecting pipes that are hermetically sealed by the pistons. Between the end of the stroke of the slide unit and the end of the stroke on the plate side of the cylinder. It is characterized in that the provided.

[0006]

[Action]

 When the pressure fluid is supplied to and discharged from the pair of pressure chambers partitioned by the plurality of pistons, the body and the pair of plates attached to the rod move relatively. Near the end of the stroke of the body, even if a large external force acts on the body, a cover that is movable with respect to the body compresses the shock absorbing spring provided between the cover and the cylinder end of the body. As it moves, the body stops at the end of the stroke as a buffer. Therefore, the shock absorbing spring can absorb the shock at the stroke end of the slide unit. Since the slide unit has a shock absorbing spring built into the body, the working member can be directly attached to the slide unit.

[0007]

【Example】

 1 and 2 show an embodiment of the present invention, in which a body 11 of the slide unit 10 has a thin rectangular parallelepiped shape and is provided with two through holes that are substantially parallel to the longitudinal direction. The end blocks 12a, 12b and 13a, 13b for airtightly closing both ends of are attached to the body 11 by retaining rings 14, ... Provided at the openings of the through holes. Rods 16a and 16b, which penetrate the end blocks 12a, 12b and 13a, 13b in an airtight manner, are provided with pistons 17 at the central portions in the axial direction, and the ball bearings 18, ... Plates 20a and 20b are attached to the tip end protruding outwardly of the body 11 by a retaining ring 19, ... (Only one side is shown), and the lock plate is attached to the upper surface of the plate 20a in the figure. 21 is attached by appropriate means.

In the through hole, connecting pipes 24a and 24b, which slide in airtight contact with the seal packings 22 and 22 of the pistons 17 and 17, are attached so as to be movable in the axial direction. Covers 25a, 25b and 26a, 26b are respectively screwed on both axial ends of 24b, and these covers and connecting pipes are connected to the rods 16a, 16b and the pistons 17, 17 are movable relative to each other. Then, first pressure chambers 28a and 29a are formed between the end blocks 12a and 13a and the pistons 17 and 17, a breathing chamber 28b is formed between the piston 17 and the cover 25b, and a second pressure chamber 29b is formed between the piston 17 and the cover 26b. The covers 25a and 26a are provided with communication holes 30 and 30 which penetrate the axial direction and open in the radial direction, and the body 11 and the cover 25b are provided with radial breathing holes which communicate the breathing chamber 28b with the outside. , 37 are formed respectively.

The body 11 is provided with a communication hole 31 that allows the first pressure chambers 28a and 29a to communicate with each other. The pressure chambers 28a and 29a communicate with each other through the communication holes 30, 30 and 31, and the rod 11 also has a rod shape. The second pressure chamber 29b communicates with the first supply / discharge port 32 of the lock plate 21 by the flow path 33a provided in 16a, and the second pressure chamber 29b is the second supply / discharge port opened in the lock plate 21 by the flow path 33b provided in the rod 16b. It is connected to 34. Although not shown, the first supply / discharge port and the second supply / discharge port are also formed on the side surface of the lock plate 21 on the left side in the drawing, and these supply / discharge ports are formed by the flow paths 33a and 33b. To communicate individually. Therefore, compressed air can be supplied to and discharged from the pressure chamber through one of the plurality of first and second supply / discharge ports.

Between the covers 25b, 26b and the spring receivers 35, 35 provided in the through holes, shock buffer springs 36, 36 for buffering the shock at the stroke end of the body 11 are contracted. Further, the distance between the covers 25a and 26a and the pistons 17 and 17, that is, the stroke of the first pressure chambers 28a and 29a is larger than the distance between the covers 25b and 26b and the spring bearings 35 and 35, that is, the buffer stroke of the body 11. It is being touched.

In the body 11, shock absorbers 39, 39 are mounted on the surfaces facing the plates 20a, 20b, and an adjust bolt 40 is mounted on the plate 20b, and both ends are mounted on the plates 20a, 20b. The bar 41 is provided with position detection switches 42, 42 which are movable along the bar 41 and can be fixed at arbitrary positions. Reference numeral 43 in FIG. 1 is a locking mechanism that locks the body 11 at the upper end position in the drawing.

The first and second supply / discharge ports in the above embodiment are used by closing ports other than the ports suitable for piping and the port 32a opened in the body 11 with a plug (not shown). To be done. The plates 20a and 20b are fixed to appropriate members (not shown) so that compressed air is supplied from the first supply / discharge port 32 to the first pressure chambers 28a and 29a, and the second supply / discharge port 34 is used to supply the compressed air. When the air in the pressure chamber 29b is discharged, the compressed air pressure supplied to the first pressure chambers 28a, 29a causes the body 11 to move upward in the drawing to the state shown in FIG. When the compressed air is supplied to the chamber 29b and the air in the first pressure chambers 28a, 29a is discharged from the first supply / exhaust port 32, the compressed air pressure supplied to the second pressure chamber 29b causes the body 11 to move as shown in FIG. Move down. When a working member attached to the body 11 comes into contact with a work (neither of which is shown) near the end of the downward stroke of the body 11 in the figure, the covers 25b and 26b that move relative to the body 11 slightly move to cause an impact. Since the buffer springs 36, 36 are compressed, the body 11 is buffered at the end of the downward stroke. Therefore, the shock absorbing springs 36, 36 provided in the body 11 can absorb the shock at the stroke end of the sliding unit 10.

In the above embodiment, since the shock absorbing springs 36, 36 are provided in the body 11, the working member can be directly attached to the body 11, so that the eccentric force acting on the body 11 can be reduced. . Further, when a work is sucked by a suction pad or the like, a large force is required to lift the sucked work, but a large force is not required to move the body to the work suction position. Therefore, in the above-described embodiment, the compressed air is supplied to the one second pressure chamber 29b between the piston 17 and the cover 26b to move the body 11, thereby eliminating wasteful consumption of air. The working member attached to the body 11 is not limited to the one having the suction pad, and may be, for example, one provided with a chuck for gripping the workpiece at the tip.

[0014]

[Effect of device]

 The slide unit of the present invention is provided with a shock absorbing spring in the body of the slide unit for absorbing the shock at the stroke end of the slide unit. It is possible to directly attach a desired working member, which can reduce the eccentric force acting on the slide unit.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of an embodiment.

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic view of a known suction conveyance device.

[Explanation of symbols]

 11 Body 16a, 16b Rod 17 Piston 20a, 20b Plate 24a, 24b Connection pipe 25a, 25b, 26a, 26b Cover 28a, 29a, 29b Pressure chamber 36 Impact buffer spring

Claims (1)

[Scope of utility model registration request] 1. A body having a plurality of cylinders arranged in parallel, a piston and a rod slidably inserted in each cylinder, and a pair of plates connecting these rods outside the body, In a slide unit that supplies and discharges a pressure fluid to and from a pair of pressure chambers partitioned by the plurality of pistons, and relatively moves a body and a pair of plates, a cover is provided on both axial sides of the piston with respect to a rod and a body. The cover is provided so as to be movable relative to each other, and these covers are integrally connected by a connecting pipe that is hermetically sealed by a piston so as to integrally move between one end of the cover and the cylinder end at the stroke end of the slide unit. A slide unit with a built-in shock absorbing mechanism, which is provided with a shock absorbing spring that absorbs shock.