JPH0730343Y2 - Safety door device such as injection molding machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety door device having good operability in an injection molding machine or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, an injection molding machine having an injection mechanism 1 and a mold clamping mechanism 2 is known. The injection mechanism 1 includes a hopper 3, a heating cylinder 4 that heats and melts an injection material supplied from the hopper 3, and a hopper 3
An injection drive device that supplies the injection material inside the heating cylinder 4 to the tip end side and applies a pressure to the molten material inside the heating cylinder 4 to inject the molten material into a pair of molds 6 through a nozzle 5. 7 and 7. The mold clamping mechanism 2 includes a fixed platen 8 to which one of the pair of molds 6 is fixed, a movable platen 9 provided to face the fixed platen 8 and to which the other of the pair of molds 6 is fixed, and a fixed platen. Four tie bars 11 that are supported by the board 8 and the end plate 10 and guide the movable board 9, and a mold clamping cylinder 12 that is connected to the movable board 9 and the end plate 10 and fixed to the end plate 10 expands and contracts. And a toggle mechanism 13 for moving the movable platen 9 back and forth with respect to the fixed platen 8. In addition, 14 is a machine body.

In this type of injection molding machine, a safety door 15 is provided on the front side of the surface of the mold clamping mechanism 2 in FIG. As shown in FIG. 7, an upper roller 16 rotatable about a horizontal axis and a lower roller 17 rotatable about a vertical axis are attached to the upper and lower portions of the safety door 15, respectively. On the other hand, above the machine body 14, an upper guide rail 18 and a lower guide rail 19 are fixedly provided apart from each other in the vertical direction. The upper roller 16 is placed on the upper guide rail 18 and guided and moved along the upper guide rail 18 while supporting the weight of the safety door 15.
The individual pieces make a pair and come into contact with the front and rear surfaces of the lower guide rail 19 to be guided and moved along the lower guide rail 19. Then, when performing work such as attachment and detachment of a mold to and from the mold clamping mechanism 2, the safety door 15 is moved from the fixed platen 8 side to the end plate 10 side and opened. By moving from the plate 10 side to the fixed plate 8 side and closing it, the safety for the operator can be achieved. Reference numeral 20 is a handle of the safety door 15.
A similar device is described in Japanese Utility Model Laid-Open No. 1-235797.

[0004]

However, in the above injection molding machine, the upper guide rail 18 for guiding the movement of the safety door 15 interferes with the mold replacement and the mold adjustment, which deteriorates the operability. Was there. The present invention has been made in view of the above circumstances, and the safety door is moved in the machine operation side space at the lateral position between the fixed platen and the movable platen without the upper guide rail for the safety door. It is an object to provide a guided safety door device.

[0005]

In order to achieve the above object, the present invention is guided by a guide mechanism into a machine operation side space at a lateral position between a fixed plate and a movable plate of a mold clamping mechanism. In a safety door device such as an injection molding machine provided with a safety door that opens and closes, a guide mechanism that guides opening and closing of the safety door is provided only on the lower end side of the safety door.
A guide member extending in the opening / closing direction of the safety door;
The safety door is fixed to the door and engages with the guide member.
Is movably supported along the longitudinal direction of the guide member.
The main feature of the structure is that it includes a support member .

[0006]

According to the above construction, the safety door is opened and closed without the upper guide rail for the safety door being provided on the machine operation side at the lateral position between the fixed platen and the movable platen. There is nothing that hinders these operations when adjusting the mold, which improves operability.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In each embodiment, the same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. First, in the first embodiment shown in FIG. 1, a linear guide rail (guide member) having a rectangular cross section is provided on the upper surface of the machine body 14.
21 is fixed toward the direction in which the safety door 15 should move. On the other hand, the side surface (inner surface) of the mold clamping mechanism of the safety door 15
A linear guide (supporting member) 23 is fixed to the lower portion of 15 a so as to face the linear guide rail 21 via a bracket 22. A square groove 23a is formed on the surface of the linear guide 23 on the side of the linear guide rail 21, and the safety door 15 is slidably fitted in the groove 23a with a ball interposed in the linear guide rail 21. Together, they are movable in the length direction of the linear guide rail 21. The linear guide rail 21, the bracket 22, and the linear guide 23 form a guide mechanism 25.

Then, the mold is attached to the mold clamping mechanism 2,
When performing work such as removal, the safety door 15 is opened and moved from the fixed plate side to the end plate side, and during the injection operation, it is closed and moved from the end plate side to the fixed plate side.
At this time, it is the linear guide rail 21 fixed to the machine body 14 that guides the opening and closing movement of the safety door 15 while supporting the weight of the safety door 15 while keeping the safety door 15 upright. In the fitted linear guide 23, the upper guide rail 18 of the conventional example is provided in the upper part of the machine operation side space (the upper part of the safety door moving range) at the lateral position between the movable platen and the fixed platen. When the safety door 15 is opened and moved to the end plate side, there is nothing on the side of the safety door 15 above the mold clamping mechanism 2 that interferes with the work. At times, work can be done safely and easily, improving operability. In addition, the linear guide 23 moves along the linear guide rail 21, and the safety door 1
In No. 5, since the rectangular concave groove 23a of the linear guide 23 is securely and slidably fitted to the linear guide rail 21 having a rectangular cross section, it does not fall in the front-rear direction.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the machine body 14
Two guide rods (guide members) 31 which are parallel to the upper surface of the machine body 14 and are vertically separated from each other are provided on the upper side of the safety door 15 via a support (not shown). On the other hand, at the bottom of the safety door 15,
Two rectangular guide members spaced in the direction of movement of the
(Supporting member) 32 is fixedly provided. Each of these guide members 32 is formed with two guide holes 33 vertically spaced apart by a predetermined distance. A bush 34 is press-fitted into each of the guide holes 33 and fixed to the guide member 32. The guide member 32 includes the bush 34 as described above.
It is fitted to the guide rods 31 of the book so as to be slidable in the axial direction thereof, and the safety door 15 is guided and moved along the guide rods 31. A guide mechanism 35 is configured by the guide rod 31, the guide member 32, the bush 34, and the like.

Also in this second embodiment, the safety door 15
The guide rod 31 fixed to the machine body 14 guides the opening and closing movement of the safety door 15 when opening and closing the vehicle.
When the safety door 15 is moved to the end plate side because the guide member 32 fitted to the safety door 15 does not have the upper guide rail 18 of the conventional example above the safety door moving range. Since there is no obstacle in the work on the side of the safety door 15 on the upper side of the mold clamping mechanism 2, work can be performed easily and safely at the time of mold replacement or mold adjustment, and operability is improved. . Further, in the safety door 15, since the guide member 32 fixed to the safety door 15 is fitted to the pair of upper and lower guide rods 31 and moves along the guide rods 31, the weight is surely supported by the guide rods 31 and the front and rear It does not fall in the direction.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the machine body 14
Of the upper guide rail 4 extending in the moving direction of the safety door 15 and protruding vertically, on the side surface 14a of the safety door 15 side.
1, a rail member (guide member) 43 having a T-shaped cross section having a lower guide rail 42 is fixedly attached. On the other hand, the lower portion of the safety door 15, two guide rollers 44, 45 in a pair of guide rollers spaced at predetermined intervals in the vertical
Two sets of (supporting members) are provided at intervals in the moving direction of the safety door 15. Each of these guide rollers 44, 4
5 has flanges on both sides, the inner surface 15 of the safety door 15
It is attached rotatably around a horizontal axis provided perpendicular to a. The upper guide roller 44 is engaged with the upper guide rail 41 so as to be movable along the upper guide rail while rotating, and the lower guide roller 45 is rotated with the lower guide rail 42 while rotating. 42 is movably engaged along. The rail member 4
A guide mechanism 46 is constituted by the guide rollers 44, 45 and the like.

Also in this third embodiment, the safety door 15
The rail member 43 fixed to the machine body 14 and the guide rollers 44 and 45 engaged with the rail member 43 guide the opening and closing movement of the machine.
Without the upper guide rail 18 of the conventional example, the safety door 15
The work to be performed when the door is opened can be performed safely and easily, and the operability is improved. In addition, since the guide rollers 44 and 45 attached to the safety door 15 are vertically separated and protrude, and the safety door 15 moves while rotating along the lower guide rails 41 and 42, the rail member 43 ensures the weight. It is supported by and does not fall back and forth.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. In this embodiment, the upper surface of the machine body 14 has a rectangular guide rail (guide portion).
Material 51 is fixed in the moving direction of the safety door 15. Further, a support 52 is provided upright on the upper surface of the machine body 14 at a position lateral to the end of the open movement of the movable platen 9. The upper portion of the support 52 is formed in a hook shape, and a hole 53 parallel to the guide rail 51 is formed in the hook shape portion.
Are formed. A linear bush 54 is incorporated in the hole 53, as shown in FIGS.

On the other hand, on the upper part of the inner surface 15a of the safety door 15, there is provided a bracket 55 which is orthogonal to the inner surface 15a and projects toward the mold clamping mechanism 2 side. A pipe 56 parallel to the guide rail 51 is slidably fitted in the linear bush 54 in the axial direction thereof.
One end of is fixedly attached to the bracket 55. Further, in the lower part of the inner surface 15a of the safety door 15,
A plurality of guide rollers (supporting members) 57 are provided at intervals in the moving direction of the safety door 15. Each of these guide rollers 57 has flanges at both ends, and the safety door 1
5 is rotatably attached to the inner surface 15a of the shaft 5 about a horizontal axis fixed vertically. The guide roller 57 is fitted to the guide rail 51 and rolls along it. The guide rail 51 and the guide roller 5
7, bush support 52, bracket 55, pipe 5
The guide mechanism 58 is configured by 6 and the like.

Then, the mold is attached to the mold clamping mechanism 2,
When the safety door 15 is opened when performing work such as removal, the guide roller 57 moves while rolling on the guide rail 51 along with the safety door 15, and at the same time, the pipe 56 slides in the linear bush 54. It moves and moves, and one side of the mold clamping mechanism 2 (the machine operation side space at the lateral position between the movable platen and the fixed platen) is opened. Further, when the safety door 15 is closed during the injection operation, the pipe 56 and the guide roller 57 move together with the safety door 15 from the end plate 10 side to the fixed platen 8 side, and the machine operation side space is closed by the safety door 15. , Ensure safety.

In this embodiment, the safety door 15 is
When the pipe 56 is moved to the end plate 10 side together with the safety door 15 when it is opened and moved from the fixed plate 8 side to the end plate 10 side, it is fixed above the machine operation side space as in the conventional example. Since there is no upper guide rail 18 and there is no obstacle in the upper part on the side of the safety door 15 between the fixed platen 8 and the movable platen 9, there is no obstruction. Can be made safe and easy and the operability is improved. Further, in this embodiment, the guide rail 51
With the bush support 52, the guide roller 57,
Through the bracket 55, the pipe 56, etc., the safety door 15
The safety door 15 does not fall no matter where it is.

[0017]

According to the present invention, the safety door of the injection molding machine is provided with a safety door which is opened and closed by being guided by the guide mechanism in the machine operation side space at the lateral position between the fixed platen and the movable platen. In the device, the guide mechanism for guiding the opening / closing movement of the safety door is provided at the lower part of the safety door side, and is omitted at the upper part of the safety door side. It is possible to eliminate the upper guide rail for the safety door, which has been installed on the safety door side when the safety door is moved to the end plate side during mold replacement or mold adjustment. There is no obstruction to the work of die replacement and die adjustment, the operation space is enlarged, the work can be performed easily and safely, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a second embodiment of the present invention.

FIG. 3 is a sectional view of an essential part showing a third embodiment of the present invention.

FIG. 4 is a sectional view of an essential part showing a fourth embodiment of the present invention.

FIG. 5 is a plan view of an essential part of a fourth embodiment of the present invention.

FIG. 6 is a front view of an essential part of a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part showing an example of a conventional safety door device.

FIG. 8 is a front view showing an example of an injection molding machine equipped with a conventional safety door device.

[Explanation of symbols]

 2 Mold clamping mechanism 4 Heating cylinder 5 Nozzle 8 Fixed plate 9 Movable plate 10 End plate 11 Tie bar 15 Safety door 25, 35, 46, 58 Guide mechanism

Claims (1)

[Scope of utility model registration request] 1. A safety door device such as an injection molding machine provided with a safety door which is opened and closed by being guided by a guide mechanism in a machine operation side space at a lateral position between a fixed plate and a movable plate of a mold clamping mechanism. in the guide mechanism for guiding the opening and closing of the safety door, said safety
Opening and closing direction of the safety door provided only on the lower end side of the door
And a guide member extending to the safety door and fixed to the safety door.
Engage the inner member to secure the safety door in the longitudinal direction of the guide member.
Safety door apparatus such as an injection molding machine, wherein the this <br/> comprising a support member for movably supported along the direction.