JPH0539746U - Tie bar stop device for die casting machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tie bar fixing device improved so that a pair of half rings can be removed from a tie bar without being separated. [Structure] One pair of half rings 1a is rotatably connected and the other end is detachably connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tie bar stopping device of a die casting machine, more specifically, a movable platen is inserted and supported midway from the link housing to the fixed platen, and the end of the tie bar mounted horizontally is fixed to the fixed platen by a tie bar nut. The present invention relates to an improvement of a tie bar stopping device used for fixing a shaft in a clinging manner.

[0002]

[Prior art and its problems]

 Generally, a tie bar of a die casting machine has one end side fitted into a tie bar mounting hole of a link housing and connected and held by a tie bar pulling device provided in the link housing, and the other end side fitted into a tie bar mounting hole of a fixed platen. It is inserted and fixed by a tie bar nut and a tie bar stopper so that the movable platen is inserted and supported in the middle from the link housing to the fixed platen, and then mounted horizontally, and when changing the mold. The tie bar nut and the tie bar stopper are removed, and the tie bar withdrawal device is used to pull out between the fixed platen and the movable platen. By the way, as shown in FIG. 5, the conventional tie bar fixing device connects the both ends of the pair of half rings 1a 'with bolts 17 respectively, and removes the bolts 17 to completely remove the half ring 1a'. Since the tie bar 3 was detached from the tie bar 3 in a separated state, when removing the bolt 17, the half ring 1a 'must be held with one hand to prevent it from dropping accidentally. It had to be done in the US, and it was extremely difficult in terms of workability and safety.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of such conventional circumstances, and the technical problem to be solved is a tie bar stopper improved so that it can be removed from the tie bar without separating the pair of half rings. The purpose is to provide a device.

[0004]

[Means for achieving the object]

 The technical means taken by the present invention to achieve the above object is characterized in that one end side of a pair of half rings is rotatably connected and the other end side is detachably connected.

[0005]

[Action]

 Thus, according to the above-mentioned technical means of the present invention, the connection state of the other end side of the pair of half-rings is released, and the other end side is expanded in the direction away from each other by using the one end side as a fulcrum. The half ring can be removed together from the tie bar.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The ring stopper 1 has the same diameter as the outer diameter of the mounting portion 3a at the end of the tie bar 3 which is fitted and supported in the tie bar mounting hole 2a of the fixed platen 2. One end side of the pair of half-rings 1a formed by the inner diameter (radius) is rotatably connected and the other end side is detachably connected, and an outer peripheral projecting shape is formed on the mounting portion 3a at the end of the tie bar 3. The tie bar nut 4 is attached to the fixed platen 2 and the end of the tie bar nut 4 is clamped to the fixed platen 2.

Various means can be considered as a means for rotatably connecting one end side of the half ring 1a to each other, but in the present embodiment, both end surfaces of both half ring 1a are scooped off. The ring width is narrowed, the pin 6 is projected on the gouging surface of the gouging end 5, and the connection plate 7 is engaged and mounted between both the pins 6, so that the connection plate 7 is placed between the pins 6. The clip 8 is elastically locked and attached. Also, one end of both half-split rings 1a is formed by cutting the upper half side of the end faces of the gouging ends 5 which are butted against each other into an arch shape and turning upward with the boundary between the arch part and the lower half as a fulcrum. Are connected (see FIG. 2).

The connection on the other end side of the half ring 1a is such that one ring 1a is provided with a stepped through hole 9 having a large diameter on the abutting end face, and the end face side which is flatly drawn out, and has a small diameter. A female screw 9a is engraved on the inner peripheral surface of the hole, while the abutting end surface of the other ring 1a located on the axis of the stepped through hole 9 has the same diameter as the small diameter hole of the stepped through hole 9. A screw hole 10 having a diameter is provided as a recess, and a bolt 11 screwed through the through hole 9 side is screwed into the screw hole 10 to detachably connect the other ends of the two halved rings 1a.

In the figure, reference numeral 12 is a rotation preventing key groove provided on the inner surface of one ring of the half ring 1a, which is fitted and locked to a key 13 axially provided on the groove bottom of the mounting portion 3a at the end of the tie bar 3. In order to prevent the half ring 1a from rotating carelessly, and to keep the half ring 1a mounted so that one end of the rotatably connected half ring 1a is always positioned above the outer periphery of the tie bar 3. The connection and removal work by the bolt 11 on the other end can be quickly performed.

Then, the tie bar nut 4 is removed and a tie bar pulling device (not shown) pulls out the tie bar 3 from between the fixed platen 2 and the movable platen 14. The bolt 11 on the other end of the split ring 1a is removed to separate the other end. At this time, the bolt 11 remains in the state in which the threaded portion 11a thereof is locked in the large diameter portion of the through hole 9 and does not come off from the one ring 1a. Then, the two half rings 1a can be removed together from the tie bar by holding the two half rings 1a with both hands and spreading the other end side away from each other with the turning portion on one end side as a fulcrum.

FIG. 4 shows another embodiment in which one end side of the half ring 1a is rotatably connected to each other. The outer surfaces of the ends of both half rings 1a are cut flat as shown in the drawing, and both flat ends thereof are cut. One end of each half ring 1a is connected so that the hinge 16 is attached to the outer surface of the part and can be rotated upward.

In the above-described embodiment, the other end of the half ring 1a is detachably connected to the screw hole 10 provided on the other side by screwing through the through hole 9 provided on the one side. A detailed description has been given as a mode in which the bolts 11 are screwed together, but it is also possible to attach magnets to the ends of the two half rings 1a and connect them by magnetic force. This is because the other end of the half ring 1a is always positioned at the lower outer periphery of the tie bar 3 by fitting and locking the detent key 12 and the key 13.

[0013]

[Effect of the device]

 Since the tie bar stopping device of the present invention is constructed as described above, it has the following operational effects. Remove the tie bar nut and pull out the tie bar from between the fixed platen and the movable platen using the tie bar pulling device.When changing the mold, release the connection state of the other end of the pair of half rings, and use one end as a fulcrum. Both halves can be removed together from the tie bar by spreading the ends apart from each other. Therefore, only the other end of the pair of half rings can be separated, that is, the half ring can be removed from the tie bar without completely separating it as in the past, so the half ring accidentally drops. It is no longer necessary to perform the detaching work in an unstable posture such as pushing with one hand so that it is possible to provide an effective tie bar stop device with improved workability and safety.

[Brief description of drawings]

FIG. 1 is a front view showing a part of a die casting machine.

FIG. 2 is a perspective view showing a tie bar stopper according to an embodiment of the present invention.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged cross-sectional view showing another embodiment of the tie bar fixing device.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

1 ... Tie bar stop device 1a ... Half ring 3 ... Tie bar 4 ... Tie bar nut

Claims (1)

[Scope of utility model registration request] 1. A tie bar stopping device for a die casting machine, wherein one end side of a pair of half rings is rotatably connected and the other end side is detachably connected.