JPH058105Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clamping device, and particularly to a type of clamping device that is fixed to the plate surface of a mold mounting plate with bolts.

[Prior art]

In general, injection molding equipment and die casting equipment
Various types of clamping devices are used to secure the mold to the surface of the mold mounting board.

Usually, in the above-mentioned clamp device, the clamp device main body is fixedly held by fastening it with a bolt to a pre-formed bolt hole on the board surface, or if a T-groove is formed in the board surface, a T-shaped groove is inserted into the T-groove. The clamp device body is fixed to the panel surface by disposing a fixing member and screwing the tip of a bolt inserted into the clamp device body into the T-shaped fixing member.

In conventional clamp devices, basically, a clamp member such as a clamp arm is pivotally attached to the clamp device main body via a support shaft, or is mounted so as to be movable only within a movement stroke range for a predetermined clamp operation. It is provided in a predetermined positional relationship with respect to the clamp device main body, and is adapted to accommodate changes in the size of the mold by changing the mounting position on the panel surface of the clamp device main body.

[The problem that the idea attempts to solve]

When fixing the clamping device to the panel surface with bolts, the clamping device had to be removed from the panel surface and reattached to a different position each time the mold was replaced with one of a different size, which was a very complicated process. . Moreover, if there is no bolt hole at a desired position on the board surface, it is necessary to newly form a bolt hole.

Therefore, in order to avoid changing the position of the clamping device, a measure is often taken to keep the size of the mold constant.

When fixing the clamp device to the board surface via a T-slot, the T-slot is usually not formed vertically and horizontally but only in one direction, so the clamp device can be moved freely in the direction of the T-slot. It is possible, but T
Since the clamping device cannot be freely moved in the direction perpendicular to the groove, it is often necessary to reinstall the clamping device when replacing the mold. Moreover, since the mold mounting board often does not have any T-slots, the method of fixing the clamp device using the T-slots lacks versatility.

Furthermore, in conventional clamping devices, basically only one clamping member is provided in one clamping device, so it usually takes four to secure one mold.
Use a stand clamp device. In this case, the positions of the four clamping devices must be changed every time the mold is replaced, which is not only quite cumbersome, but also requires a large number of hydraulic hoses that supply hydraulic pressure to the clamping devices, making their handling complicated. .

An object of the present invention is to provide a clamp device in which the position of the clamping point can be freely changed without changing the position of the clamp device main body.

[Means to solve the problem]

The clamping device according to the first claim is a clamping device for fixing a mold to a board surface of a mold mounting board,
An elongated block-shaped main body member is provided, a plurality of hydraulic cylinders are installed in the main body member perpendicularly to the board surface and have piston rods protruding toward the board surface, and the screw shaft portion at the tip of the piston rod is inserted into the screw hole in the board surface. The main body member is fixedly held at a predetermined position outside the board surface, and a clamp member is disposed between the main body member and the board surface and extends along the main body member and extends toward the mold side from the main body member. A fulcrum part that contacts the plate surface is formed at one end on the side opposite to the mold, and an action point part that presses the mold is formed at the other end, and a piston rod of a hydraulic cylinder is inserted into each of the clamp members, and the one end A plurality of elongated slits are formed from one end toward the other end.

The clamping device according to the second claim is a clamping device for fixing the mold to the board surface of the mold mounting board,
An elongated block-shaped main body member is removably fixed to the board surface, and a plurality of hydraulic cylinders are installed in the main body member perpendicularly to the board surface and have piston rods protruding toward the opposite side of the board surface. A locking member is fixed, a clamping member is provided between the main body member and the locking member, extending along the main body member and protruding toward the mold side from the main body member, and one end of the clamping member on the side opposite to the mold. A fulcrum part that contacts the plate surface is formed at one end, and an action point part that presses the mold is formed at the other end, and a piston rod of a hydraulic cylinder is inserted through each of the clamp members, and from the one end to the other end. It has a plurality of elongated slits facing toward the direction.

[Effect]

In the clamping device according to the first aspect, a plurality of hydraulic cylinders are incorporated into the elongated block-shaped main body member perpendicularly to the board surface, and the main body member is attached to the board surface via the piston rod of the hydraulic cylinder to a predetermined position outside the board surface. Since it is held in position, when the hydraulic cylinder is driven, the clamp member is pressed toward the board surface by the main body member, the fulcrum part of the end of the clamp member on the side opposite to the mold comes into contact with the board surface, and the other end The mold is pressed at the point of action, and the mold is fixed to the mold mounting board.

On the other hand, the clamp member is formed with a plurality of elongated slits extending from one end to the other end,
Each piston rod of the hydraulic cylinder is inserted through the slit so that it can move freely relative to the slit, so the clamp member is movable relative to the main body member in the direction of the slit, and the clamp member can be inserted into the main body member according to the size of the mold. The position of the action point of the clamp member can be freely changed without changing the position of the clamp member.

Since a plurality of hydraulic cylinders are incorporated into the main body member, hydraulic pressure can be supplied from one common hydraulic pressure supply hose by forming oil passages within the main body member. Since the main body member is attached to the panel surface via the piston rod of the hydraulic cylinder, the main body member can be attached using as few bolt holes as there are hydraulic cylinders, making it relatively easy to attach and remove the main body member. .

The clamp member is not particularly connected to the main body member, but since the piston rod is inserted through each of the plurality of slits in the clamp member, the clamp member may pivot around the axis of the piston rod when the clamp member is moved. Therefore, the clamp member can be easily positioned at a predetermined position.

In the clamp device according to the second aspect, the elongated block-shaped main body member is removably fixed to the board surface of the mold installation board, and a plurality of hydraulic cylinders are incorporated in the main body member perpendicularly to the board surface, and the hydraulic cylinders The piston rod protrudes toward the opposite side of the board and has a locking member fixed to its tip, so when the hydraulic cylinder is driven, the clamp member between the main body member and the locking member is pushed toward the board by the locking member. Then, the fulcrum at one end of the clamp member on the side opposite to the mold comes into contact with the board surface, and the application point at the other end presses the mold, thereby fixing the mold to the mold mounting board.

On the other hand, the clamp member is formed with a plurality of elongated slits extending from one end to the other end,
Each piston rod of the hydraulic cylinder is inserted through the slit so that it can move freely relative to the slit, so the clamp member is movable relative to the main body member in the direction of the slit, and the clamp member can be inserted into the main body member according to the size of the mold. The position of the action point of the clamp member can be freely changed without changing the position of the clamp member.

In addition to the above, the same effects as in the first claim are achieved.

[Effect of the invention] According to the clamp device according to the first claim, as explained above, the clamp member is movable relative to the main body member in the direction of the slit, and the clamp member is movable in the direction of the slit according to the size of the mold. Since the position of the operating point can be changed freely, molds of various sizes can be fixed by effectively utilizing the small number of bolt holes on the surface of the mold mounting board, and the position of the main body member can be changed when replacing the mold. Since it is only necessary to move the clamp member without changing it, the preparatory work for fixing the mold becomes very simple, and other effects can be obtained.

In addition, since the main body member incorporating a plurality of hydraulic cylinders and the clamp member correspond to multiple sets of clamp devices, it is advantageous in terms of attachment/detachment, handling, storage, etc. of the clamp device. .

According to the clamp device according to the second claim, the first
The same effects as the clamp device according to the claims can be obtained.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

In this embodiment, the present invention is applied to a clamp device for fixing a mold in a horizontal injection molding machine.

As shown in FIG. 1, a fixed plate (not shown) and a movable plate 2 of the injection molding apparatus 1 are disposed parallel to each other in the front and back, and the movable plate 2 moves in the front and rear direction via four guide rods 3. A plurality of bolt holes 5 are recessed in a predetermined arrangement on the plate surfaces 4 of the fixed plate and the movable plate 2, and a support member 6 elongated in the left and right direction is fixed to the lower part of the plate surface 4. A pair of clamp devices 7 are fixed to the right and left parts, respectively, and the mold 8
is mounted between the board surfaces 4 and supported at a predetermined height position by a support member 6, and is fixedly held on each board surface 4 by a pair of left and right clamp devices 7, respectively.

Each of the clamping devices 7 includes a vertically elongated block-shaped main body member 10, a pair of upper and lower hydraulic cylinders 11 installed in the upper and lower parts of the main body member 10, and a space between the main body member 10 and the board surface 4. The clamp member 12 extends along the main body member 10 and has a width approximately 2.5 times that of the main body member 10, for example. Since these clamp devices 7 are the same, the one provided on the left side of the plate surface 4 of the movable plate 2 will be explained.

The main body member 10 is a vertically elongated block-like member, and as shown in FIGS. 2 to 4, a pair of upper and lower cylinder holes 13 are formed in the front-rear direction, respectively, and approximately at the center thereof. There is a hydraulic pressure supply passage 1 in the vertical direction that communicates with each cylinder hole 13.
4 is formed, both the upper and lower ends of the hydraulic pressure supply passage 14 are closed by sealing bolts 15 screwed onto the main body member 10, and the middle part of the hydraulic pressure supply passage 14 is opened at the left end surface of the main body member 10 and is connected to the outside. A hydraulic pressure supply passage 17 is formed that communicates with a hydraulic pressure supply hose 16 of a hydraulic pressure supply device (not shown). Note that the sealing bolt 15 may be formed in the shape of a plug that does not protrude from the surface of the main body member 10.

Each of the hydraulic cylinders 11 is for driving the main body member 10 toward the panel surface 4, and as shown in FIGS. 2 to 4, a piston 20 is installed in the cylinder hole 13 so as to be slidable in an oil-tight manner. An annular engagement part 21 with a slightly smaller diameter is formed at the rear end of the cylinder hole 13, and an annular member 22 engages with the engagement part 21 in an oil-tight manner and moves rearward. An annular member 22 is attached to the piston 20 in a substantially central portion thereof.
A piston rod 23 is integrally formed, which is inserted in an oil-tight manner and projects rearward, and a hydraulic chamber 24 is formed between the piston 20 and the annular member 22, and the hydraulic chambers 24 of the four hydraulic cylinders 11 are They are communicated via a hydraulic pressure supply passage 14.

A screw shaft portion 23a is formed at the rear end of the piston rod 23 and is screwed into the bolt hole 5.
0 is held at a predetermined position outside the board surface 4 via a piston rod 23, an annular guide member 25 is fixed to the front end of the cylinder hole 13, and a ring-shaped guide member 25 is fixed to the center of the piston 20, protruding back and forth and sliding onto the guide member 25. A movably fitted protrusion 26 is integrally formed.

Piston rod 23 between main body member 10 and plate surface 4
A substantially cylindrical protective sleeve 27 is attached to the housing, and the front end of the protective sleeve 27 is bent inward and abuts against the annular member 22. A compression spring 28 that presses in the opposite direction is mounted on the exterior.
Note that the upper ends of the protective sleeve 27 and the spring 28 may be attached to the annular member 22 with screws or the like.

The clamp member 12 consists of a flat plate part 30 that overhangs the main body member 10 to the left and right sides and is substantially parallel to the board surface 4, and a bent part 31 that extends rearward from the left end of the flat plate part 30 and comes into contact with the board surface 4. The flat plate part 30 has a substantially L-shaped cross section, and a protective sleeve 27 can be inserted into the flat plate part 30 at a position corresponding to each hydraulic cylinder 11. 32 is formed,
The clamp member 12 is inserted into the mold 8 through the slit 32.
It is guided so that it can move forward and backward.

A substantially U-shaped leaf spring 33 in plan view is provided on the rear end surface of both the upper and lower ends of the flat plate portion 30 to contact the board surface 4 and press the clamp member 12 in the direction opposite to the board surface 4. A handle 34 is provided to protrude forward at approximately the middle portion, a substantially central portion of the front end surface of the flat plate portion 30 is brought into contact with the rear end surface of the main body member 10 via a leaf spring 33, and the clamp member 12 is attached to the flat plate portion 30. It is held by the frictional resistance between the main body member 10 and the main body member 10, and can be moved relatively easily.

A fulcrum part 35 that contacts the plate surface 4 is formed at the rear end of the bent part 31, and an action point part 36 that can press the outer peripheral edge of the mold 8 from the front is formed at the right end of the flat plate part 30.
is formed, and the main body member 1 is located approximately at the center of the flat plate portion 30.
The portion in contact with 0 becomes a point of effort 37. Although the slit 32 is a notched slit, it may also be an elongated slit. Incidentally, as the bolt holes 5 for fixing the clamp device 7, not only existing bolt holes but also bolt holes formed separately may be used as necessary. Further, the number of hydraulic cylinders 11 provided in the clamp device 7 is not limited to four sets, but a desired number of two or more sets of hydraulic cylinders 11 can be provided. As the number of hydraulic cylinders 11 increases, each hydraulic cylinder 11 can be made smaller and the clamp device 7 can be made smaller.

Next, the operation of the clamp device 7 will be explained.

In order to fix the mold 8 to the panel surface 4, when pressure oil is supplied to the hydraulic working chamber 24 of each hydraulic cylinder 11 via the hydraulic supply passages 14 and 17, the hydraulic working chamber 2
4 expands and the main body member 10 is pushed backwards, causing the board surface 4
As shown by the imaginary line in FIG. The outer peripheral edge of the mold 8 is pressed toward the board surface 4, and the mold 8 is fixed to the board surface 4.

When the pressure oil in the hydraulic chamber 24 is drained in order to replace the mold 8 with one of a different size, the compression spring 28
As the main body member 10 moves forward,
The clamp member 12 is moved forward by the leaf spring 33 and the clamp is released, and the mold 8 is replaced in this state. After replacing the mold 8, hold the handle 34 and move each clamp member 12 in the left-right direction, position the action point 36 of each clamp member 12 on the outer peripheral edge of the mold 8, and apply pressure to each hydraulic cylinder 11. Oil is supplied and the replaced mold 8 is fixed on the board surface 4.

As described above, even when replacing the mold 8 with one of a different size, the mold 8 can be clamped by simply moving the clamp member 12 in the left and right direction and changing the position of the point of action, so the clamp device 7 There is no need to reinstall it.

Moreover, the protective sleeve 2 is inserted into the four slits 32.
7 is inserted, the clamp member 12 does not rotate around the axis of the piston rod 23.
The clamp member 12 can be easily positioned on the outer peripheral edge of the mold 8, and the efficiency of replacing the mold 8 can be improved.

In addition, four hydraulic cylinders 11 are connected to the main body member 10.
Since it is integrated into the clamp device 7,
can be miniaturized as a whole, and can be mounted on the panel surface 4 by effectively utilizing a small number of existing bolt holes 5.
a hydraulic pressure supply passage 14 formed within the main body member 10;
17, the hydraulic pressure supply hose 16 can be shared, and the surface of the panel 4 can be simplified.

Here, the configuration of the clamp device 7 may be partially changed as follows. Note that the same members are given the same reference numerals and detailed explanations thereof will be omitted.

As shown in FIGS. 5 and 6, the clamp device 7
A is a vertically elongated main body member 10A fixed to the board surface 4 with bolts 40, a pair of vertically oriented hydraulic cylinders 11A installed in the upper and lower parts of the main body member 10A, and a front cylinder 11A of the main body member 10A. The clamp member 12A is disposed in the main body member 10A and extends along the main body member 10A.

The clamp member 12A has a flat plate portion 30A that extends to both left and right sides than the main body member 10A and is substantially parallel to the board surface 4, and a bent portion 31A that extends rearward from the left end of the flat plate portion 30A and comes into contact with the board surface 4.
A pressing portion 41 extending rearward from the right end of the flat plate portion 30A and capable of abutting against the outer peripheral edge of the mold 8 has a substantially U-shaped cross section, and is located at a position corresponding to each hydraulic cylinder 11A of the flat plate portion 30A. A slit 32A that is long in the left-right direction is formed from the right end of the flat plate portion 30A to the vicinity of the left end.

A fulcrum portion 35A that contacts the board surface 4 is formed at the rear end of the bent portion 31A, and an action point portion 36A that can press the outer peripheral edge of the mold 4 from the front is formed at the rear end of the pressing portion 41. has been done.

Four cylinder holes 13A are formed in the rear part of the main body member 10A, and a piston 20A is installed in the cylinder hole 13A in an oil-tight and slidable manner.
0A in an oil-tight manner and slit 32A.
The piston rod 23A is inserted through the piston rod and protrudes forward.
A flange portion 42 is formed in the middle of the piston rod 23A, and the piston rod 23A
A locking nut 43 is screwed onto the front end of the piston rod 23 between the locking nut 43 and the flat plate portion 30A.
An annular locking washer 46 that contacts the front end surface of the flat plate portion 30A is attached to the locking washer 4 of the flat plate portion 30A.
The portion that 6 contacts becomes a force point portion 37A, and the clamp member 12A is held between the flange portion 42 and the locking washer 46 so as to be movable in the left-right direction.

The rear end of the cylinder hole 13A is closed with a lid member 44, a hydraulic chamber 24A is formed between the piston 20A and the main body member 10A, and the hydraulic chambers 23A of the four hydraulic cylinders 11A are inside the main body member 10A. A compression spring 45 is installed between the piston 20A and the lid member 44, which communicate with each other via the formed hydraulic pressure supply passage 14A, and urges the piston 20A forward.

When pressure oil is supplied to each hydraulic chamber 23A, as shown in FIG. When pushed, the clamp member 12A rotates around the fulcrum portion 35A, and the outer peripheral edge of the mold 8 is clamped at the action point portion 36A. In addition, when fixing molds 8 of different sizes to the board surface 4, the clamping member 12A is moved in the left-right direction to replace the working point part 36A of the mold 8.
The hydraulic cylinder 11A is clamped by supplying pressure oil to the hydraulic cylinder 11A.

Similar to the clamping device 7, the clamping device 7A can simplify the work of fixing the mold 8 and improve its work efficiency, can downsize the clamping device 7A as a whole, and can simplify the top of the board 4. You can get the effects you want.

Incidentally, the clamping devices 7 and 7A described above can of course be applied as clamping devices for fixing molds in die-casting devices, press molding devices, and the like.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a vertical sectional front view of an injection molding machine, FIG. 2 is a front view of a clamping device, FIG.
The drawings are a view taken along the arrow in FIG. 2, FIG. 5 is a front view of a main part of a clamping device according to a modified example, and FIG. 6 is a sectional view taken along the line shown in FIG. 5. 2...Movable plate, 4...Plate surface, 5...Bolt hole,
7,7A...clamp device, 8...mold, 10,
10A...Body member, 11,11A...Hydraulic cylinder, 12,12A...Clamp member, 23,2
3A... Piston rod, 23a... Spiral shaft, 3
2, 32A... slit, 35, 35A... fulcrum part, 36, 36A... action point part, 46... locking washer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A clamping device for fixing a mold to the board surface of a mold mounting board, which is provided with an elongated block-shaped main body member, which is incorporated into the main body member orthogonally to the board surface, and A plurality of hydraulic cylinders with piston rods protruding toward the board surface are provided, and the screw shaft portion at the tip of the piston rod is fixed to a screw hole in the board surface to hold the main body member at a predetermined position outside the board surface, and between the main body member and the board surface. A clamp member is provided that extends along the main body member and extends toward the mold side from the main body member, and a fulcrum part that contacts the board surface is formed at one end of the clamp member on the side opposite to the mold, and the other end A point of action for pressing the mold is formed in the clamp member, and a plurality of elongated slits are formed in the clamp member, through which piston rods of a hydraulic cylinder are respectively inserted, and which face from the one end to the other end. clamping device. (2) A clamping device for fixing a mold to the surface of a mold mounting board, which has an elongated block-shaped main body member removably fixed to the board surface, and a piston rod that is installed in the main body member orthogonally to the board surface. A locking member is fixed to the tip of the piston rod, and a locking member is provided between the main body member and the locking member, and extends along the main body member and is closer to the mold than the main body member. A clamp member is provided that extends to the clamp member, and one end of the clamp member on the side opposite to the mold forms a fulcrum part that comes into contact with the board surface, and the other end forms an action point part that presses the mold, and the clamp member A clamp device characterized in that the member is formed with a plurality of elongated slits through which piston rods of a hydraulic cylinder are respectively inserted and which are directed from the one end to the other end.