JP3037593B2 - Guided cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide cylinder.

[0002]

2. Description of the Related Art Conventionally, a guide cylinder has a work table supported on a guide rail provided on a base, and the work table is reciprocated by one cylinder formed in the base. The tip of a piston rod that protrudes and retracts from the cylinder tube is connected to the work table.

By the way, the cylinder with a guide is required to be thinner in order to reduce the space occupied in the manufacturing process and the like. In a conventional cylinder with a guide, the required thrust is obtained by one cylinder, so that the diameter of the cylinder is large. Therefore, the cylinder is an obstacle to thinning. Therefore, the cylinder is constituted by a pair of cylinders having a small diameter so as to obtain a necessary thrust, the diameter of each cylinder is reduced, and the thickness of a base forming the cylinder is reduced to reduce the thickness. .

[0004]

By the way, the guide cylinder is required to be further reduced in thickness.
However, the conventional guide cylinder has been limited in thickness reduction.

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a cylinder with a guide that can be made thinner.

[0006]

To solve the above problems SUMMARY OF THE INVENTION, invention includes a base, an upper surface of the base of claim 1
A work table supported by the guide rail provided on, provided on the base, and a pair of cylinders whose piston rod is connected to the work table, the work table by the reciprocating operation of the both cylinders In a guided cylinder that is reciprocated along the guide rail, both sides of the guide rail on the upper surface of the base
Extends along the guide rails at
The syringe is formed so as to protrude upward,
Cylinder block with
Work table and each piston
A connection member for connecting the
Part of the tool between the cylinders and
The left and right sides are thin above the cylinder block
It was formed into a shape.

[0007]

[0008]

According to the invention described in claim 1, when both piston rod reciprocates, the work in a state where part of the work table to be connected by two piston rods to the connecting member is disposed between the cylinder block The table reciprocates. At this time, since the connecting member is connected to each piston rod at a position separated from both cylinder blocks,
Does not interfere with each cylinder block. Therefore, in order to reciprocate in a state where part of the work table is positioned between the two cylinders, a work table and both cylinders are provided between the narrow distance.

According to a second aspect of the present invention, in the first aspect of the present invention, the base has a stop member in contact with the work table for stopping the work table in the moving direction of the work table. Provided to be changeable.

According to the invention described in claim 2 , according to claim 1,
In addition to the operation of the invention described in the above, the work table is stopped at a changeable stop position by a stop member provided on the base. Therefore, it is not necessary to provide a stopping means for stopping the work table at a predetermined stop position outside.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the guided cylinder 1 includes a base 2. The base 2 has a guide rail 3 extending in the front-rear direction on the upper surface thereof. On both sides of the rear part of the base 2, cylinder blocks 4 and 5 extending in the front-rear direction are integrally formed so as to protrude upward. As shown in FIG. 2, a cylinder hole 6 extending in the front-rear direction is formed through the right cylinder block 4. As shown in FIG. 3, a groove 7 along the cylinder hole 6 is formed in front of the cylinder hole 6 so as to extend in the front-rear direction.

A rod piece 8 is fitted to a front end inside the cylinder hole 6. An end piece 9 is fixed to the rear end of the cylinder hole 6 so as to seal the inside of the cylinder hole 6. A piston chamber 10 is formed between the rod piece 8 and the end piece 9.
A piston rod 11 is inserted into the rod piece 8 from the front, and its rear end is disposed in the piston chamber 10. A portion of the piston rod 11 on the front side of the rod piece 8 is housed inside the groove 7. A piston 12 is fixed to the rear end of the piston rod 11. The piston 12 is accommodated in the piston chamber 10 so as to be slidable in the front-rear direction. The piston chamber 10 is partitioned by the piston 12 into a front chamber 10a and a rear chamber 10b. Front room 10
a is communicated with the outside through the port 13 and the rear chamber 10b is communicated with the outside through the port 14. When the piston 12 is driven back and forth, the portion of the piston rod 11 on the front side of the rod piece 8 moves back and forth inside the groove 7. At the rear end of the piston rod 11, a magnet 15 for detecting the piston position is provided. The right cylinder 16 is composed of the cylinder block 4, the rod piece 8, the end piece 9, the piston rod 11, the piston 12, and the like.

The cylinder block 5 has the same construction as the right cylinder block 4. As shown in FIG.
A piston chamber 17 is formed in the cylinder block 5. This piston chamber 17 has a piston rod 1 from the front.
8 is inserted, and a piston 19 is fixed to the rear end of the piston rod 18. A left cylinder 20 is constituted by the cylinder block 5, the piston rod 18, the piston 19, and the like. A groove 7 is provided in front of the cylinder block 5.
The same groove 21 is formed. When the piston 19 is driven, the piston rod 19 moves back and forth inside the groove 21. A port 13 is provided in a front chamber defined by a piston 19 of the piston chamber 17 via a flow path 22, and a flow path 23 is provided in the rear chamber.
Are connected to each other via the. Therefore, both piston rods 11, 18 are connected to each port 13, 1
When the air is supplied to any one of the four, the actuator moves back and forth in synchronization.

A work table 24 is supported on the guide rail 3 so as to be movable in the front-rear direction. As shown in FIG. 4, the lower part of the center part of the work table 24 is formed in a thick shape that enters between the two cylinder blocks 4 and 5, and the left and right side parts are similarly the left and right cylinder blocks 4 and 5.
5 is formed in a thin shape arranged above. The rigidity required for the work table and the area of the upper surface 24a are secured by the thick central portion and the thin left and right side portions.
The lower part of the center of the work table 24 is
6 and 20 are arranged between the height ranges in the vertical direction.

At the front end of the work table 24, a connecting member 25 is fixed. As shown in FIG. 3, the lower right portion of the connecting member 25 extends inside the groove 7 and is connected to the front end of the piston rod 11. Further, the lower left portion of the connecting member 25 is extended into the inside of the groove 21, and the piston rod 1
8 is connected to the front end. And both pistons 12,
When 19 reciprocates, the connecting member 25 reciprocates on both grooves 7, 21.

The front end of the base 2 has a front end block 2
6 is fixed. A stop bolt 27 is screwed to the front end block 26 with a nut 28 so as to be adjustable in the front-rear direction. A well-known hydraulic shock absorber 29 is screwed to the front end block 26 with a nut 30 so as to be adjustable in the front-rear direction.

A rear end block 31 is fixed to the rear end of the upper surface of the base 2. Rear end block 3
1, a stop bolt 32 is screwed into the nut 33 so as to be adjustable in the front-rear direction. Also, the rear end block 31
, A known hydraulic shock absorber 34 is screwed with a nut 35 so as to be adjustable in the front-rear direction. In the present embodiment, stop members are formed in the stop bolts 27 and 32 and the hydraulic shock absorbers 29 and 35.

Next, the operation of the guide-equipped cylinder configured as described above will be described. The guide-equipped cylinder 1 of the present embodiment is arranged such that the lower part of the center of the work table 24 is located between the height ranges in which the left and right cylinders 16 and 20 are arranged. Therefore, since the left and right cylinders 16 and 20 and the work table 24 are arranged within a narrow range in the vertical direction, the thickness of the cylinder with guide 1 can be reduced.

When air is introduced into the port 14 in the state shown in FIG. 1, both the piston rods 11 and 18 are driven forward, and the work table 24 is moved forward together with the connecting member 25. At this time, the connecting member 25 moves in a region outside the cylinder blocks 4 and 5 and does not interfere with the cylinder blocks 4 and 5.

When the work table 24 moves to the front of the substrate 2, the front end of the work table 24 contacts the hydraulic shock absorber 29. Therefore, the collision of the work table 24 is buffered, and the work table 24 comes into contact with the stop bolt 27 and stops at a gradually reduced speed.

When the supply of air to the port 14 is stopped and the air is supplied to the port 13 instead, the piston rods 11 and 18 are driven rearward, and the work table 24 moves rearward via the connecting member 25. Is done. When the work table 24 moves to the rear of the substrate 2, the rear surface comes into contact with the hydraulic shock absorber 34. Therefore, the collision of the work table 24 is buffered, and the work table 24 comes into contact with the stop bolt 32 and stops at a gradually reduced speed.

Accordingly, the work table 24 is provided with the hydraulic shock absorbers 29 and 34 and the fixing bolts 27, provided at both ends of the base 2.
32. And each nut 28,3
The stop position of the work table 24 is changed by loosening 0, 33, 35 and changing the positions of the hydraulic shock absorbers 29, 34 and the fixing bolts 27, 32. As a result, it is not necessary to provide a stopping means for stopping the work table 24 at the predetermined stop position outside the guide cylinder 1.

As described above, according to the cylinder with guide of the present embodiment, the following effects are obtained. (A) Cylinder blocks 4 and 5 are formed on both sides of the rear part of the base 2 so as to protrude upward, and cylinders 16 and 20 are formed inside the cylinder blocks 4 and 5, respectively. The lower part of the center of the work table 24 is arranged between the cylinders 16 and 20. Therefore, since the cylinders 16 and 20 and the work table 24 can be provided within a narrow range in the vertical direction, the entire cylinder 1 with a guide can be further reduced in thickness.

(B) Since the cylinders 16 and 20 are not provided below the work table 24, the load applied downward to the work table 24 is not directly applied to the cylinders 16 and 20. Therefore, the deformation of the cylinders 16 and 20 due to the load is reduced, and the operation thereof can be stabilized.

(C) A pair of cylinders 1 arranged in parallel
Since the work table 24 is driven in steps 6 and 20, the rigidity is improved and the amount of eccentricity due to the bending moment acting on the work table 24 is reduced. Therefore, high positioning accuracy can be obtained.

(D) Since the work table 24 is driven by the pair of cylinders 16 and 20, a large thrust can be obtained with the compact guide cylinder 1. It should be noted that the present invention is not limited to the above-described embodiment, and may be configured as follows.

[0028]

( 1 ) Two guide rails 3 may be provided in parallel. According to this configuration, higher accuracy and higher rigidity can be obtained .

[0030]

[0031]

As described in detail above, according to the first or second aspect of the present invention, it is possible to further reduce the thickness.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, a stop means for externally stopping the work table at a predetermined stop position is provided. No need to provide.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cylinder with a guide.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

2 ... Base, 3 ... Guide rail, 4,5 ... Cylinder block, 11 ... Piston rod, 16 ... Right cylinder, 18
... Piston rod, 20 ... Left cylinder, 24 ... Work table, 25 ... Connecting member, 26 ... Front block as stop member, 27 ... Screw bolt, 29 ... Hydraulic shock absorber, 31 ... Similar rear block, 32 ... Similarly, stop bolts, 34 ... Hydraulic shock absorbers.

Claims (2)

(57) [Claims] 1. A base (2), and a guide rail (3) provided on an upper surface of the base (2).
A work table (24) supported on the base (2), and a piston rod (1) provided on the base (2).
, 18) is provided with a pair of cylinders (16, 20) connected to the work table (24), and the work table (24) is guided by guide rails (3 ), The guide cylinder is reciprocated along the guide rail (3) on the upper surface of the base (2).
Each extends along the guide rail (3) and above
The cylinder is formed so as to project toward
Cylinder block (4,4) provided with (16,20)
5) and the position off the cylinder blocks (4, 5)
Work table (24) and each piston rod (1
And a connecting member (25) for connecting the work table (24) to both cylinders (16, 2).
0), placed on the left and right sides of the work table (24)
Part is placed above the cylinder block (4,5).
Guided cylinder formed in a different shape. 2. A work table (2) on a base (2).
4) Stop members (26, 27, 2) that stop by contacting
9, 31, 32, 34) in the direction of movement of the worktable.
2. The guide-equipped series according to claim 1, wherein the position is changeable.
Nda.