JPS6325900B2 - - 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.

<Problems to be solved by the invention> 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 present invention eliminates abnormal wear due to acceleration of the fluid pressure actuator and power wastage due to pressure fluid leakage,
Moreover, the purpose is 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. 1 to 4, turns the base end 13 of the chain 7. part 18
Engage the sprocket 19 with the inner circumference of the chain 7.
The outer surface of the vertically elongated chain portion 21 on the side of the tip portion 12 than the turn portion 18 is guided in a manner to prevent bending by a vertical guide surface 22 fixed to the case 1, and an actuation cylinder is used as the fluid pressure actuator 23. 23 cylinder barrel 14 and piston rod 28
One side of the sprocket is oriented vertically and fixed to the case 1, and a sprocket 19 is rotatably supported on the other side.A pinion 37, which is smaller than this, is fixed to the sprocket 19 so as to be integrally rotatable.
Fix the vertically long rack 38 that engages with the case 1,
It is characterized in that the base end 13 of the chain 7 is configured to be movable with respect to the case 1.

<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. As a result, sprocket 19
The chain 7 rotates counterclockwise while rising, and while pushing down the proximal side vertically long chain part 20 of the chain 7, pulls up the distal side vertically long chain part 21, and draws the clamp 51 connected to the chain distal end 12 to the right.

Furthermore, when the actuating cylinder 23 is driven to contract in the opposite direction, the clamp 51 is pushed out to the left due to the movement in the opposite direction.

In this push/pull drive, the relationship between the stroke S of the operating cylinder 23 and the push/pull dimension L of the clamp 51 is L=(D/d+1)S, that is, S=d/D+dL. Here, D is the diameter of the sprocket 19, and d is the diameter of the pinion 37.

In the present invention, since D>d, S>L/2, and the actuating cylinder 23 can be a small one with a stroke S shorter than 1/2 of the push/pull dimension L. For example, if you want S=L/3, d=D/2
If you want to set S=L/4, you can set d=D/3.

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

Embodiment 1 (See Figures 1 to 4) In the figure, reference numeral 1 is a vertically elongated case, in which a pair of case walls 2, 2 made of U-shaped steel are placed front and back to face each other with a gap 3 left in between. In this state, their upper ends are fixed to the top plate 4 and their lower ends are fixed to the bottom frame 5. T from the right edge of the top surface of the bottom frame 5 to the bottom edge of the left side.
The groove-shaped entrance/exit 6 is formed in an L-shaped bent shape. 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. By fixing the bending preventer 11, the structure is such 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. Make a counterclockwise U-turn on the base end 13 of the chain 7.

A pair of front and rear sprockets 19 for each chain roller 8 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 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 it to prevent bending. The one-sided bending preventer 10 projects 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 inserted into the assembly hole 24 at the center of the top 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.

A pinion 37 having a smaller diameter than this is fixed to the sprocket 19. Rack 3 that engages pinion 37
8 to the case wall 2. Proximal end 1 of chain 7
An elevating cart 39 is fixed to 3, and the elevating cart 39 is guided along the vertical guide surface 22 so as to be freely raised and lowered.

Reference numeral 31 is a hydraulic hose, and 32 is an electric wire, which runs along the U-shaped space of the bending preventer 11 of the chain 7, the tip of which reaches the tip 12 of the chain 7, and the base end of which is attached to the lifting platform. 39 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 left and right 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 fixing plate 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 cylinder 63. 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. By moving the mold 61 left and right on the trolley 60 while being guided by the T groove 68 and moving the mold 61 left and right on the roller conveyance device 69, the mold 61 is transported between the injection molding machine 59 and the trolley 61. Carry it out.

Embodiment 2 (See FIG. 9) In the structure shown in FIG. 9, the part 20 of the chain 7 on the tip side of the turn part 18 is guided in a spiral shape by a guide rail 70 in the structure of the first embodiment. be.

Embodiment 3 (See FIG. 10) In the structure shown in FIG. 10, the chain 7 is formed from a single steel strip in the structure of Embodiment 1 or 2.

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, 72 on both sides are cut at equal pitches.

Example 4 (See Figures 11 and 12) The structure shown in Figures 11 and 12 has the structure of Example 1, Example 2, or Example 3, but uses C-beam steel for the case wall 2. However, a double rod type is used for the operating cylinder 23, and the piston rod 2
8 across the top plate 4 and bottom frame 5 of the case 1, and the sprocket 1 is fixed to the cylinder barrel 14.
The buffer spring 7 is connected to the pivot shaft 30 of 9 via the support 76.
7 and 78, it is supported so as to be movable 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 The stroke S of the operating cylinder is the push/pull dimension L
Therefore, compared to the case where the chain is directly connected to the actuating cylinder for push/pull, it is recommended that the height of the actuating cylinder, case, and entire device be less than half (for example, 1/3 )
can be significantly shortened.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1A is a longitudinal sectional front view of Embodiment 1, FIGS. 1B and C are mechanical 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. 10 is a perspective view of the chain of Example 3, FIG. 11 is a vertical side view of Example 4, and FIG. 12 is a cross-sectional plan view of FIG. 11. 1...Case, 6...Entrance/exit, 7...Chain, 12...
Tip part, 13... Base end, 14... Cylinder barrel part,
18...turn part, 19...sprocket, 21...
Vertical chain portion, 22... Vertical guide surface, 23... Fluid pressure actuator = single rod type operating cylinder, 28...
Piston rod, 37...pinion, 38...rack.

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 turned, the sprocket 19 is engaged with the inner circumference of the turn portion 18 of the chain 7, and the turn portion 18 of the chain 7 is turned. Tip 12
The outer surface of the side vertically elongated chain portion 21 is guided to prevent bending by a vertical guide surface 22 fixed to the case 1, and an actuation cylinder is used as the fluid pressure actuator 23.
One of the cylinder barrel 14 and piston rod 28 of the operating cylinder 23 is fixed to the case 1 vertically, and the sprocket 19 is attached to the other side.
A smaller pinion 37 is rotatably fixed to the sprocket 19, and a vertically elongated rack 38 that engages with the pinion 37 is fixed to the case 1. A fluid pressure actuator-driven single-break chain transmission type push/pull operating device, characterized in that it is configured to be movable with respect to a case 1.