JPS6325901B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for driving a single-fold chain forward and backward using a fluid pressure actuator to push and pull something connected to the tip of the chain.

This device can be used, for example, as a clamp to secure a mold to the bolster or slide of a press machine, a clamp to secure a work pallet to the table of a machining center, or a clamp to secure a mold or work pallet between a press machine, an injection molding machine, or a machining center and a loading table. It is used to push and pull hook devices that carry in and out.

In the above-mentioned press machines, etc., it is necessary to push and pull the clamps horizontally, but the proximal end of the single-fold chain that transmits the push and pull can be run vertically from the perspective of reducing the installation area. requested.

In order to satisfy this requirement, the present invention has a prerequisite structure, for example, as shown in FIGS. A single-folded chain 7 is run vertically inside the case 1, and the tip 12 of the chain 7 is bent at one end of the case 1 and guided laterally outward from the entrance/exit 6. 23, the distal end portion 12 of the chain 7 is moved laterally outward and outward from the entrance/exit 6.

<Prior Art> Conventionally, the technology disclosed in US Pat. No. 4,326,624 is known.

That is, the reference numeral 30 in FIGS. 1 and 3 of this publication is a single-folded chain, and this chain 3
0 is pushed and pulled by a hydraulic motor 27 via a sprocket.

<Problem that the invention seeks to solve> The above conventional structure has the following problems.

B Hydraulic motors have a complicated structure, making them expensive and causing abnormal wear when accelerations of 30G or more are applied.

Pressure oil leaks inside the hydraulic motor when pushing the chain to the forward position or pulling it to the reverse position, wasting power.

C. In order to eliminate the above-mentioned power wastage, it is conceivable to attach a brake device linked to the hydraulic motor, but this would complicate the structure.

The object of the present invention is to eliminate abnormal wear due to acceleration of a fluid pressure actuator and power wastage due to pressure body leakage, and to downsize the entire device.

<Means for Solving the Problems> In order to achieve the above object, the present invention, for example, as shown in FIGS. The sprocket 19 is engaged with the inner periphery of the U-turn portion 18 of the chain 7, and each vertically long chain portion 20 connected to the U-turn portion 18 of the chain 7 is made vertically movable.
21 are run parallel to each other, and the outer surfaces of the vertically long chain parts 20 and 21 are guided to prevent bending by a vertical guide surface 22 fixed to the case 1, and an operating cylinder is used as the fluid pressure actuator 23. One of the cylinder barrel 14 and the piston rod 28 of 23 is vertically fixed to the case 1, and a sprocket 19 is rotatably supported on the other side, and cable guides 37 and 38 are provided at the upper and lower parts of the case 1. , the transmission cable 39 is wound around both cable guides 37 and 38, one side of the transmission cable 39 is interlocked and connected to the operating cylinder 23, and the transmission cable 39 is connected to the operating cylinder 23.
The base end 13 of the chain 7 is interlocked and connected to the other side portion of the chain 9, thereby interlockingly connecting the base end 13 of the chain 7 to the operating cylinder 23 via the transmission cable 39 so as to drive it in the upside down direction. It is characterized by things.

<Effect> Next, the operation of the present invention will be explained.

When the actuating cylinder 23 is driven to extend from the contracted state shown in FIG. 1B to the extended state shown in FIG. 1C, the sprocket 19 rises and the chain base end 1
3 goes down. As a result, the distal end side vertically elongated chain portion 21 is pulled up, and the clamp 51 connected to the chain distal end portion 12 is drawn to the right.

Further, when the actuating cylinder 23 is driven to contract in the opposite direction, the sprocket 19 is lowered and the chain base end 13 is raised. As a result, the sprocket 19 is rotated clockwise by engagement with the proximal end vertically long chain portion 20, pushing down the distal end vertically long chain portion 21 and pushing out the clamp 51 to the left.

In this push/pull drive, the stroke S of the actuating cylinder 23 becomes ⅓ of the push/pull dimension L of the clamp 51, as shown in FIG. 1C. That is, compared to the case where the chain 7 is directly connected to the working cylinder 23 for pushing and pulling, the length of the working cylinder 23 is reduced to 1/3.
It can also be shortened to

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Embodiment 1 (Refer to Figures 1 to 4) Reference numeral 1 in the figure is a vertically elongated case, which has a pair of case walls 2 made of U-shaped steel facing each other in the front and back with a gap 3 in between. Their upper ends are fixed to the top plate 4, and their lower ends are fixed to the bottom frame 5. bottom frame 5
A T-groove-shaped entrance/exit 6 is formed in an L-shaped bend from the right side of the top surface to the bottom side of the left side.

Reference numeral 7 designates a single-fold type chain, in which a chain roller 8 is pivotally supported by a chain pin 10 at both the front and rear outer sides of a chain link 9, and a piece with a U-shaped cross section extends over one side edge of each pair of chain links 9. Break prevention tool 11
is fixed so that it can be bent freely on the left side but cannot be bent on the right side.

Run the chain 7 vertically in the right half of the case 1. The tip 12 of the chain 7 is passed through the entrance 6, bent laterally to the left, and led out laterally. The base end 13 of the chain 7 is connected to the lifting truck 42 by making a counterclockwise U-turn. The lifting cart 42 is connected to the case wall 2
It fits into the vertical guide surface 22 consisting of the left side edge of , so that it can move up and down.

A pair of front and rear sprockets 19 are installed in each of the eight rows of chain rollers before and after the U-turn portion 18 of the chain 7.
Bite 19. The left and right vertically long chain parts 20 and 21 connected to the U-turn part 18 of the chain 7 are run parallel to each other, and the outer surfaces of the eight rows of chain rollers of each vertically long chain part 20 and 21 are formed from each side edge of the case wall 2. The vertical guide surface 22 guides to prevent bending. The one-sided bending preventer 10 protrudes outward from the gap 3.

Reference numeral 23 is a single-rod type actuating cylinder driven by pneumatic or hydraulic pressure. The cylinder barrel 1
4 is press-fitted into the assembly hole 24 at the center of the upper surface of the bottom frame 5, and by tightening the upper flange 15 of the cylinder barrel 14 toward the bottom frame 5 side with the bolt 25 and nut 26, the cylinder barrel 14 is attached to the bottom. Fix it to frame 5.
The flange 15 is fixed to the case wall 2 with bolts 27.

The piston rod 28 projects upward from the cylinder barrel 14, and a pair of sprockets 19 are rotatably supported on a pivot shaft 30 fixed to the tip with a bolt 29.

Idle wheels 3 for cable guides are installed at the top and bottom of case 1.
7 and 38 are pivotally supported by respective support shafts 40 and 41, and a transmission cable 39 is wound around both idle wheels 37 and 38. The right side of the transmission cable 39 is attached to the pivot shaft 30 of the sprocket 9.
At the same time, a cart 42 is connected to the left side portion of the transmission cable 39. As a result, the transmission cable 39,
The base end 13 of the chain 7 is connected to the piston rod 2 of the operating cylinder 23 via the truck 42 and the pivot shaft 30.
8 and are interlocked and connected so as to be driven in the upside down direction.

Reference numeral 31 is a hydraulic hose, and 32 is a power source. These run along the U-shaped space of the bending preventer 11 of the chain 7, and the tip thereof reaches the tip 12 of the chain 7, and the base end is connected to the lifting platform. 42 and connected to the hydraulic hose 33 and electric wire 34. 3
5 and 36 are hydraulic or pneumatic supply pipes.

Next, how to use the device of the present invention will be explained.

1 and 5 show an example in which the device 50 of the present invention is used to push and pull a fixing clamp 51 of an upper die 58 of a press machine.

A plurality of T grooves 54 are arranged in front and back and run from side to side on the lower surface of an upper die fixing plate 53 fixed to the lower surface of a slide 52 of the press machine. 4 on the front, rear, left and right sides of the fixed plate 53
A clamp 51 is attached to the position so as to be movable left and right along the T-slot 54.

Each device 50 of the present invention has one clamp 5.
1 is operated by pushing and pulling. The ends of the chain 7, hydraulic hose 31, and electric wire 32 are connected to the clamp 51. The hydraulic hose 31 supplies and discharges pressure oil to the clamp cylinder 55, and the electric wire 32 is for transmitting whether or not the forward end detection limit switch 56 has been detected.

The entrance/exit 6 is aligned with the T-groove 54, and the bottom frame 5 is fixed to the left and right end surfaces of the fixed platen 53 with bolts 57. This allows the device 50 of the present invention to push and pull the clamp 51 left and right.

Further, FIGS. 6 to 8 show an example of use of the apparatus 50 of the present invention in a case where a mold 61 is carried in and out between a horizontal injection molding machine 59 and a mold exchange trolley 60.

The device 50 of the present invention is installed upside down on the left side of a truck 60, and the end portions of the chain 7, hydraulic hose 31, and electric wire 32 are connected to the main body 63 of the hook device 62, the hook engagement/disengagement cylinder 64, and the hook detachment detection. Connect to limit switch 65'. By tilting the hook 65 to the right with the cylinder 64 and engaging it with the locking part 66 of the mold 61, and pushing and pulling the chain 7 of the device 50 of the present invention, the chain 7 and the hook device main body 63 are moved to the guide rail 67. The mold 61 is transported between the injection molding machine 59 and the trolley 61 by being guided by the T groove 68 and moving left and right on the trolley 60, and moving the mold 61 left and right on the roller plate feeding device 69.・Carry out.

Embodiment 2 (See FIG. 9) In the structure shown in FIG. 9, the chain 7 is formed from a single steel band in the structure of Embodiment 1 described above.

That is, a steel strip is bent to have a hat-shaped cross section over its entire length, sprocket engagement holes 72 are formed at equal pitches in the length direction of folded portions 71 on both sides, and the upper wall 73 and both side walls 74 are formed. The separation lines 75 connected to the sprocket engagement holes 72 on both sides are cut at equal pitches.

Embodiment 3 (See FIGS. 10 and 11) What is shown in FIGS. 10 and 11 is the case wall 2 in the structure of the above embodiment 1 or 2.
The piston rod 28 is fixed across the top plate 4 and bottom frame 5 of the case 1, and the sprocket 19 is pivoted to the cylinder barrel 14. The shaft 30 is connected to the buffer springs 77 and 78 via the support 76.
It is supported so that it can be moved up and down.

<Effects> Since the present invention is configured and operates as described above, it has the following effects.

B The operating cylinder used as a hydraulic actuator has a simple structure and is therefore inexpensive, unlike the hydraulic motor used in conventional structures, and does not cause abnormal wear even when accelerations of 30G or more are applied and has excellent impact resistance. .

Since compressed air or pressure oil does not leak within the operating cylinder when the rotary chain is pressed to the forward position or pulled to the backward position, power is not wasted due to leakage.

C. Since there is no need for a brake device to eliminate the above power waste, the structure of the entire device can be simplified.

D. Since the stroke S of the operating cylinder is 1/3 of the chain's push/pull operation dimension L, the height of the operating cylinder, case, and entire device can be reduced by approximately It can be significantly shortened to 1/3 the size.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1A is a longitudinal sectional front view of Embodiment 1, FIGS. 1B and C are configuration diagrams showing the relationship between push and pull movement of the chain, and FIG. Fig. 3 is a cross-sectional plan view, Fig. 4 is a partially cutaway perspective view, Fig. 5 is a bottom view of the upper mold fixing plate of a press machine showing an example of the use of the present invention, and Fig. 6 is an alternative to the present invention. FIG. 7 is an enlarged view of the part shown in FIG. 6, FIG. A perspective view of the chain, FIG. 10 is a longitudinal side view of Example 4,
FIG. 11 is a cross-sectional plan view of FIG. 10. 1...Case, 6...Entrance/exit, 7...Chain, 12...
Tip part, 13... Base end, 14... Cylinder barrel part,
18...U-turn part, 19...Sprocket, 2
0.21...Vertical chain part, 22...Vertical guide surface, 2
3...Fluid pressure actuator = single rod type actuation cylinder, 28...Piston rod, 37, 38...Cable guide, 39...Transmission cable.

Claims (1)

[Claims] 1 Open an entrance 6 on the horizontal side of one end in the vertical direction of the vertically long case 1, run a single-fold chain 7 vertically inside the case 1, and bend the tip 12 of the chain 7 at one end of the case 1. By guiding the chain 7 laterally outward from the entrance/exit 6 and driving the chain 7 with a fluid pressure actuator 23 within the case 1, the distal end 12 of the chain 7 is moved laterally forward and backward at the lateral outside of the entrance/exit 6. In the fluid pressure actuator-driven single-fold chain transmission type push/pull operation device, the base end 13 of the chain 7 is made a U-turn so that it can move up and down with respect to the case 1, and the inner circumference of the U-turn portion 18 of the chain 7 is The sprockets 19 are engaged, and the vertically long chain parts 20 and 21 connected to the U-turn part 18 of the chain 7 are run parallel to each other, and the outer surfaces of the vertically long chain parts 20 and 21 are connected to a vertical guide surface fixed to the case 1. 22 to prevent bending, and using an actuating cylinder as the fluid pressure actuator 23, one of the cylinder barrel 14 and piston rod 28 of the actuating cylinder 23 is oriented vertically and fixed to the case 1, and the sprocket 19 is attached to the other side. It is rotatably supported, and cable guides 37 and 38 are provided at the upper and lower parts of the case 1, and both cable guides 3
7 and 38, one side of the transmission cable 39 is interlocked and connected to the actuating cylinder 23, and the base end 13 of the chain 7 is interlocked and connected to the other side of the transmission cable 39. As a result, the base end 13 of the chain 7 is interlocked and connected to the operating cylinder 23 via the transmission cable 39 so as to be driven in the upside down direction. .