JPH0523308Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a clamping device with an air coupler.
In particular, it relates to a device that connects an external air supply source and an air passage in a mold when driving a clamp.

[Prior art]

Generally, some molds of injection molding apparatuses for injection molding molded products having complex shapes are equipped with an air cylinder for driving a slide core or the like built into the mold forward and backward.

An air supply passage having an opening in the side wall of the mold is formed inside the mold, and an air supply hose is connected to this opening via an air coupler to supply pressurized air from the pressurized air supply device to the air cylinder. It is starting to supply

[The problem that the idea aims to solve]

Conventionally, the air supply hose had to be reconnected manually every time the mold was replaced, which was very complicated work. Moreover, in recent years, molds are frequently replaced due to high-mix, low-volume production, and mold replacement has become a factor that reduces work efficiency.

An object of the present invention is to automatically connect an air supply hose and an air supply passage when the clamp is driven, thereby improving work efficiency in mold replacement.

[Means to solve the problem]

The clamping device with an air cup according to the present invention includes a pressing block that is fixed to a clamping device for clamping a mold and has a first air passage formed therein that communicates with an air supply hose, and a pressure block that is fixed to a side wall of the mold and inside the mold. An air coupler is constituted by a pressure receiving block in which a second air passage communicating with the air passage is formed, and when the clamping device is driven to clamp, the pressure block is pressed by the pressure receiving block, and the first air passage and the second air The passage is airtightly communicated with the passage.

[Function] In the clamping device with an air coupler according to the present invention, the air coupler is composed of a pressing block fixed to the clamping device that clamps the mold and a pressure receiving block fixed to the side wall of the mold, and the clamping drive of the clamping device When the pressing block is pressed by the pressure receiving block, a first air passage formed inside the pressing block and communicating with the air supply hose, and a second air passage formed inside the pressure receiving block and communicating with the air passage of the mold. are communicated in an airtight manner.

[Effect of idea]

According to the clamping device with an air coupler according to the present invention, as explained above, the air coupler has a simple structure consisting of a pressure block fixed to the clamp device and a pressure receiving block fixed to the mold, and when the clamp is driven, the first Since the air passage and the second air passage are communicated, the air supply hose can be automatically connected to the air passage via the air coupler without having to manually connect the air supply hose, improving work efficiency when replacing molds. I can do it.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, a clamp device with an air coupler is applied to a press molding device.

As shown in FIG. 1, a press molding device 1 includes a fixed platen 2 and a movable platen 3 that is driven up and down relative to the fixed platen 2.
A pair of front and rear guide grooves 4 having a substantially T-shaped cross section are formed on the plate surfaces of the fixed platen 2 and the movable platen 3 from the left end to the right end, and each guide groove 4 has one pair of left and right guide grooves. A pair of clamping devices 5 with air couplers are supported movably along the guide grooves 4, and clampers for moving and driving the clamping devices 5 are mounted on the side walls of the fixed platen 2 and the movable platen 3 at both ends of each guide groove 4. A mold K consisting of a fixed mold 7 and a movable mold 8 is fixedly held on the surfaces of the fixed platen 2 and the movable platen 3 by four clamp devices 5, respectively.

To explain the above-mentioned clamper moving device 6,
As shown in FIGS. 1 and 2, a substantially rectangular parallelepiped-shaped casing 9 is fixed to the side walls of the fixed platen 2 and the movable platen 3 in a vertical direction, and a driving cylinder 10 is installed inside the casing 9 in a vertical direction. The piston rod 10a of the driving cylinder 10 is disposed with its piston rod 10a facing upward, and a pair of front and rear sprockets 11 are rotatably connected to the upper end of the piston rod 10a of the driving cylinder 10 via a pin member oriented in the front-rear direction. . The proximal end of a chain 12 is fixed to the inner side near the upper end of the cylinder body of the driving cylinder 10, and the middle part of the chain 12 is hung on the sprocket 11 and made a U-turn to the outside.
It is bent into a substantially L-shape through the inside and led out into the guide groove 4, and its tip is connected to the clamp device 5. When the driving cylinder 10 is driven, the sprocket 11 engages with the chain 12. The clamp device 5 is driven up and down while rotating, and the clamp device 5 is driven forward and backward through the chain 12 by twice the stroke of the piston rod 10a based on the principle of a movable pulley.

As shown in FIGS. 3 and 4, the chain 12 is constructed by alternately connecting a large number of link plates 13 having a substantially U-shaped cross section and a pair of front and rear link plates 14 having a substantially flat plate shape with pin members 15. Rollers 16 that engage with the sprocket 11 are rotatably provided at both ends of the pin member 15, and each roller 16 is engaged with a wide engagement groove 4a of the guide groove 4 to move the chain 12 into the guide groove. It is kept within 4.
Each ring plate 13, 14 is formed from the vicinity of the back end of the guide groove 4 to the vicinity of the board surface, and in the space formed between the front and rear link plates 13, 14, from the base end of the chain 12 to the tip end. A hydraulic supply hose 17, an air supply hose 18, and a conductive cable 19 are accommodated, and the base ends of each hose 17, 18 and cable 19 are respectively connected to a hydraulic supply device, an air supply device, and a control device (not shown). There is.
Incidentally, a portion near the tip of the chain 12 is composed of a plurality of link plates 14 connected by a plurality of pin members 15 so that each hose 17, 18 and cable 19 can be drawn out from within the space.

To explain the above-mentioned clamp device 5, the fifth
As shown in FIGS. 7 to 7, a base member 21 is fixed to the upper end surface of the housing 20 on the board side, and inside the housing 20 there is a cylinder chamber 22 oriented in the vertical direction.
A piston 23 is formed in the cylinder chamber 22.
The piston rod 24, which is slidably mounted in an oil-tight manner and is screwed onto the piston 23, passes through the housing 20 and the base member 21 and is brought out into the guide groove 4, and the end thereof is engaged with the engagement groove 4a. combined abbreviation T
A letter-shaped engaging portion 24a is formed, and the engaging portion 24a is connected to the tip of the chain 12 via a connecting plate 25. The middle part of the piston rod 24 is attached to an engagement notch 26a formed in the flange part 26 in the vertical direction so that the flange part 26 of the mold K is located between the plate surface and the base member 21, and the piston rod A hydraulic pressure supply passage 28 that communicates the hydraulic pressure supply hose 17 and the hydraulic working chamber 27 is formed inside the hydraulic working chamber 24 , and when hydraulic pressure is supplied from the hydraulic supply device to the hydraulic working chamber 27 , the hydraulic working chamber 27
expands and the housing 20 becomes the piston rod 24.
The base member 21
The flange portion 26 is clamped. A spring member 30 made of a compression coil spring is disposed in the cylinder chamber 22 between the piston 23 and the lid member 29, and the housing 20 is connected to the spring member 30.
It is always biased toward the opposite side of the board surface, that is, toward the unclamping side.

The base member 21 is formed with a pair of front and rear arm portions 21a and 21b extending outward of the mold K, and the end surface of one of the arm portions 21a on the board side is in contact with a flange portion 26, and a clamping device 5 A sensor 31 for detecting the forward end of the arm is fixedly attached to the other arm portion 21b, a press block 32 and a connecting block 33 are hermetically fixed to the other arm portion 21b, a conductive cable 19 is connected to the sensor 31, and a connecting block is attached to the press block 32. An air supply hose 18 is connected via 33. A pressure receiving block 34 is hermetically fixed to the side wall of the flange portion 26 facing the other arm portion 21b, and the arm portion 21b and each block 32,
33 and 34 constitute an air cup 35.

To explain the above air coupler 35, as shown in FIG. An air passage 37 is formed to communicate with the press block 32, and a vertically oriented mounting hole 32a is passed through the press block 32. A substantially cylindrical valve member 38 is mounted in the mounting hole 32a in an airtight and slidable manner.
An annular seal ring 39 is disposed at the end of the valve member 8 on the panel surface side so as to be able to come into contact with the pressure receiving block 32, and the valve member 38 has a bottomed air passage 40 having an opening on the inner side of the seal ring 39. is formed, and the air passage 4
The rear end of the valve member 38 is branched into four parts and opened at the side surface of the valve member 38. An air chamber 3 is provided at the end of the valve member 38.
A large-diameter locking portion 38a that protrudes into the inside of the 6 is formed,
A substantially flat annular seal ring 41 is fixed to the end face of the locking part 38a on the plate side, and an annular contact part 32b that can come into contact with the seal ring 41 is formed on the inner end face of the pressing block 32. 38 is air chamber 3
6, the seal ring 41 is always biased toward the panel side by a spring member 42 made of a compression coil spring disposed within the seal ring 41, and when unclamped, the seal ring 41 comes into contact with the contact portion 32b, closing the air chamber 36 and the air passage 40. It is becoming more and more common. In addition, the air passages 37, 38
A first air passage 43 is formed from the air chamber 36 and the air chamber 36 .

An air passage 44 for supplying pressurized air for driving the slide core etc. is formed in the mold K, and a second air passage 45 communicating with the air passage 44 is formed in the pressure receiving block 34. The end of the air passage 45 is bent toward the pressing block 32 and opened to communicate with the air passage 40.

Next, the operation of the air coupler-equipped clamp device 5 will be explained.

First, when the fixed mold 7 and the movable mold 8 are combined and set between the fixed platen 2 and the movable platen 3, and the driving cylinder 10 is driven, the clamping device 5 moves along the guide groove 4 toward the mold K side. The middle part of the piston rod 10a is attached to the engagement notch 26a, the switch part of the sensor 31 comes into contact with the side wall of the flange part 26, and the drive of the driving cylinder 10 is stopped. comes into contact with the side wall of the flange portion 26, and the clamping device 5 is held in a predetermined position. At this time, as shown in FIG. 8, the pressing block 32 moves above or below the pressure receiving block 34, and the valve member 38 is held with a slight gap between it and the pressure receiving block 34.

Then, when pressure oil is supplied to the hydraulic working chamber 27,
The housing 20 is drawn toward the board surface via the piston rod 10a, the flange portion 26 is held between the base member 21 and the board surface, and the mold K is clamped. At this time, as shown by the imaginary line in FIG. 8, the seal ring 39 comes into contact with the pressure receiving block 34 and the valve member 38 moves toward the air chamber 36, opening the air passage 40 and connecting the air chamber 36 with the air. aisle 40
At the same time, the seal ring 39 is applied with a predetermined biasing force by the spring member 42 to the pressure receiving block 3.
The air passage 40 and the second air passage 45 are in air-tight contact with each other, and the pressurized air from the air supply hose 18 is in contact with the first air passage 43 and the second air passage 4.
5 and is supplied to the mold K.

As described above, the base member 2 is attached to the clamp device 5.
The air coupler 35 has a simple structure in which the pressure block 32 fixed through the mold K is brought into contact with the pressure receiving block 34 fixed to the mold K, and the first air is connected to the air supply hose 18 at the same time as the clamp is driven. The passage 43 and the second air passage 45 communicating with the air passage 44 of the mold K can be connected, and there is no need to reconnect the air supply hose 18 every time the mold K is replaced. It is possible to automate and improve work efficiency.

In this embodiment, the pressure receiving block 34 is fixed to the side wall of the flange portion 26, but a pressure receiving portion is formed in the flange portion 26, an air passage 44 is opened in this pressure receiving portion, and a pressure receiving block 34 is attached to the front portion of the base member 21. Block 3
3 is disposed, and when the clamp is driven, the pressure receiving part is pressed by the pressing block 33 to open the first air passage 43 and the air passage 4.
4 may be communicated with each other.

Further, the clamping device 5 described above can of course be applied to other types of clamping devices. For example, in a clamping device of a type that clamps the flange portion 26 with a clamp lever, the pressing block 32 is placed between the pressure receiving block 34 and the board surface. When the clamp is driven, the mold K is pulled toward the board surface side by the clamp lever and clamped, so that the press block 32 comes into contact with the pressure receiving block 34, and the first air passage 43 and the second air passage It is configured so that it is connected to the air passage 45.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional front view of the main parts of an injection molding device, FIG. 2 is a longitudinal sectional front view of the main parts of the clamper moving device, and FIG. 3 is a longitudinal sectional front view of the chain. Figure 4 is a sectional view taken along the line shown in Figure 3;
Figure 5 is a longitudinal sectional front view of the main parts of the clamping device, etc.
The figure is a back view of the main parts of the clamp device, etc., and Figure 7 is the 5th
FIG. 8 is a vertical sectional front view of the main part of the air cup. 5... Clamp device, 18... Air supply hose, 32... Pressing block, 34... Pressure receiving block, 35... Air coupler, 41... Seal ring, 43... First air passage, 44... Air passage,
45...Second air passage.

Claims (1)

[Utility Model Registration Claims] A clamp device with an air coupler comprising a pressure block affixed to a clamp device that clamps a mold, the pressure block having a first air passage formed therein that communicates with an air supply hose, and a pressure-receiving block affixed to the side wall of the mold, the pressure block having a second air passage formed therein that communicates with the air passage inside the mold, wherein when the clamp device is driven to clamp, the pressure block is pressed against the pressure-receiving block, so that the first air passage and the second air passage are airtightly connected.