JPH0114354Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lower mold release device used in machine tools such as injection molding machines and press machines.

For example, the mold 2 used in a large press machine 1 as shown in Figures 1 and 2 weighs between 1 and 2 tons, and setup work such as mold replacement and installation requires a great deal of effort and time. spend. The upper mold 3 can be supported with a forklift or the like and installed without much difficulty.
Although a detachment operation can be performed, the lower mold 4 is placed on a bolster 5, so moving it involves particular difficulties. That is, FIG. 3a shows a plan view of the bolster 5, and the lower mold 4, which is a heavy body on the upper surface of the bolster 5, can only be moved by pushing or pulling it in the horizontal direction, and conventionally, this moving operation was not possible. , a method was used in which a round bar or square piece of wood was pushed into an inverted T-shaped groove 6 for installation formed in the bolster 5 and gradually moved horizontally by "lever action." This work is not only dangerous, but is also the main reason why it takes a lot of manpower and time to set up the mold.

In order to solve this problem, for example,
Publication No. 136872 discloses that a sliding rod is slid in the T-groove of a press bed using hydraulic pressure or air, and a mold lifting roller of a lift frame is applied to a wedge provided on the sliding rod, and a guide roller is used to move the mold in the longitudinal direction. It has been proposed that the mold is lifted by raising a lift frame whose movement is regulated.

In addition, Japanese Patent Application Laid-open No. 55-84234 discloses a cam mechanism built in by manual rotation of a lever handle,
It has been proposed that a wedge mechanism works, whereby the pins protrude below the bottom surface of the base frame, raising the base frame vertically upward and lifting the mold placed on the rollers. .

In all of these cases, during the process of lifting a mold, the lift frame or base frame is moved against the press bed or bolster due to displacement in the longitudinal direction of a rod-shaped member that moves or slides forward. It is displaced vertically upward.

By the way, in the former case, the longitudinal movement of the lift frame is regulated by guide rollers, so the structure is complicated. Since the generated horizontal force acts directly on the guide roller, the guide roller must withstand this large force, which increases the frictional force between it and the end face of the lift frame. Since it is driven by air, the press-type lift device is large and has a complicated structure, and there are problems in that the cost is high.

On the other hand, in the latter type, the lower mold is lifted by manual operation of a lever handle, but since the taper of the rod comes into sliding contact with the taper head of the pin, the friction between the two increases. In addition, when lifting the lower mold, the lever handle is pushed downward, making it difficult to push the lever handle.Furthermore, the lever handle is returned to its original position using a coil spring, which requires a large number of parts. I had a problem.

Therefore, the main purpose of this invention is to provide a new detachment device that has a simple structure and can lift and easily move the lower mold with a small force, thereby allowing mold replacement to be performed safely and quickly. The goal is to ensure that

This invention will be explained in detail below based on illustrated embodiments. FIG. 4 shows a lower mold detachment device 1 of one embodiment.
FIG. 5 is a schematic perspective view of 0, FIG. 5 a is a schematic vertical side view, and FIG. 5 b is a schematic plan view.

The lower mold 4 (see FIG. 2) is fixed on the mounting surface 5a of the mold 4 of the bolster 5 in FIG. 3 by bolts and nuts (not shown). and the nut is removed.
Next, a plurality of lower mold release devices 10 are fitted into the inverted T-shaped groove 6 of the bolster 5. As best shown in FIGS. 3a and 3b, this inverted T-shaped groove 6 extends from one side 5b of the bolster 5 to the installation surface 5a of the lower mold 4 of the bolster 5, facing it. A vertical portion 6a that extends through the other side surface 5c and extends halfway from the installation surface 5a to the groove bottom, and a horizontal portion 6b that extends from the vertical portion 6a to the groove bottom and is wider than the vertical portion 6a. It has an inverted T-shaped cross section.

As shown in FIG. 4, the detachment device 10 includes a support member 11 fixed to the bolster 5 inserted into the horizontal portion 6b of the inverted T-shaped groove 6, and a vertical portion of the inverted T-shaped groove 6. 6b and a movable member 12 that can move on the support member 11, which is stacked in two layers, upper and lower. A stopper 31 is provided at one end of the support member 11 to abut against one side 5b of the bolster 5 (see FIG. 5b) and to restrict fitting into the inverted T-shaped groove 6. Further, a shaft member 13 is provided at the one end of the support member 11, and an operating handle 14 that is rotatable around the shaft member 13 is provided. Operation handle 14
When the operating handle 14 is rotated, a pressing protrusion 16 is formed that presses the protrusion 15 provided on the movable member 12 in a "lever-like" manner. Note that the length of this operating handle 14 is approximately 30 to 40 cm.

As shown in FIGS. 5a and 5b, the movable member 12 has members that face perpendicularly to the longitudinal direction thereof, stand up from the bottom plate portion 17a, and are connected to each other by the bottom plate portion 17a on the support member 11. A first roller member 18,1 rotatably supported by a shaft 18a whose both ends are supported by a pair of upright walls 17,17.
8,...,18 are provided. The roller head of each first roller member 18 is provided so as to slightly protrude from the upper end surface of the upright wall 17.
Of course, when fitted into the inverted T-shaped groove 6 of the bolster 5, the roller head is located slightly below the upper surface of the bolster 5 (and therefore the lower surface of the lower mold 4). This situation is clearly shown in FIG. 5a, where the dash-dotted line l is the installation surface 5a of the lower mold 4 of the bolster 5.

As shown in FIG. 5a, the support member 11 and the movable member 12 are connected by a screw member 19 and cannot be detached from each other. A female threaded hole 20 is provided on the support member 11 side, and the screw member 19 is inserted through a long hole 21 bored in the movable member and screwed into the female threaded hole 20. The shaft portion of the screw member 19 does not completely enter the elongated hole 21, and a small distance remains between the screw head 19a of the screw member 19 and the support member 11. This distance is to allow vertical movement of the movable member 12 when it is lifted upwards. On the other hand, the elongated hole 21 is for allowing the movable member 12 to move in the longitudinal direction. The support member 11 is provided with projections 22 projecting upward from its upper surface at appropriate intervals, and the projections 22 form a tapered portion 22a along the direction in which the movable member 12 is pushed. , a substantially flat stationary portion 22b is formed at the top thereof. On the other hand, the movable member 12 is provided with a second roller member 23 as a riding member that freely rolls on the protrusion 22. This second
The roller member 23 has a shaft 23 whose both ends are supported by the upright walls 17, 17 similarly to the first roller member 18.
The support member 11 is rotatably supported by the support member 11, and is always in contact with the upper surface of the support member 11. Then, when the protrusion 15 of the movable member 12 is pressed by the pressing protrusion 16 of the operating handle 14 and the movable member 12 moves in its longitudinal direction, the second roller member 23
The roller member 23 is connected to the tapered portion 22a of the protruding portion 22.
This is for lifting the lower mold 4 placed on the bolster 5 above the bolster 5 when the lower mold 4 is rolled on the upper part and placed in the fixed part 22b.
Note that, instead of the second roller member 23, a protrusion 23' having substantially the same shape as the protrusion 22 illustrated in FIG. 6 and arranged point-symmetrically may be used. Of course, the tapered portion 23'a has a slope in the direction opposite to the pressing direction of the movable member 12.
In this way, the engaging roller member 23 of FIG.
This has the advantage that the structure can be simpler than using .

The operation for removing the lower mold 4 is as follows. That is, at least two detachment devices 10 are fitted into the inverted T-shaped groove 6 of the bolster. As a result, as shown in FIG. 5b, the stopper 31 comes into contact with one side 5b of the bolster 5, and the support member 11 is fixed at that position. Next, when the operating handle 14 is rotated in the direction shown by arrow A ₁ in FIG _. To,
When pushed strongly like a lever, the second roller member 23 rolls upwardly on the tapered portion 22a of the protrusion 22 of the support member 11, and forcibly rides on the stationary portion 22b. As a result, the entire moving member 12 is lifted upward by the distance between the upper surface of the supporting member 11 and the upper surface of the stationary part 22b, as shown by arrow _A3 in FIG. ,1
8 to the installation surface 5a of the lower mold 4 of the bolster 5.
The lower mold is lifted upward because it protrudes slightly (1 mm to 2 mm) from the lower mold. The lower mold supported on the plurality of first roller members 18 (including the roller members 18 of other detaching devices 10) is simply pushed in the horizontal direction and slides smoothly due to the rotation of the roller members 18. . This horizontal pushing force may be extremely small, and even a weak person, such as an elementary school student, can easily slide the slide.

Note that the number of detachment devices 10 fitted into the inverted T-shaped groove 6 may be arbitrary. This is because the larger the number, the smaller the pushing force in the horizontal direction will be. On the other hand, only one
It is also possible to use only the stand, and in this case, it is usually inserted in the center, but it is only necessary to consider the balance.

Further, it goes without saying that the length of the detachment device 10 should generally be selected depending on the size of the bolster 5, in other words, the length of the inverted T-shaped groove 6.

Further, in the description of the above embodiment, only the case where the lower mold placed on the bolster is removed is described. However, it goes without saying that the detachment device according to this invention can also be used when the lower mold is placed on a bolster for installation. This is because the operation can be performed in the exact opposite manner to that described above.

As described in detail above, according to this invention, the lift portion of the movable member including the roller member is moved by pressing the operating lever by the taper of the protrusion provided on the support member fixed to the bolster by the stopper member. The movable member is moved upward by forcibly sliding from the section to the stationary section, and the roller member is raised a short distance from the top of the bolster to lift the lower mold relative to the bolster. The lower mold on the bolster can be quickly and safely transferred just by pressing the button.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a mold, FIG. 2 is a schematic diagram of a large press machine equipped with a mold, and FIG. 3 is a bolster, with a being a plan view and b being a front view. FIG. 4 is a schematic perspective view of an embodiment of this invention, and FIG. 5 is an explanatory view, in which a is a schematic longitudinal sectional view of the embodiment and b is a plan view. FIG. 6 shows another example of the lift portion of the movable member. 4... Lower mold, 5... Bolster, 5a... Installation surface, 5b... One side, 5c... Other side, 6...
Inverted T-shaped groove, 6a...vertical part, 6b...horizontal part,
11...Supporting member, 12...Movable member, 14...
Operation handle, 15...protrusion, 17...upright wall,
17a... Bottom plate part, 18... First roller member, 1
9...Threaded portion, 21...Elongated hole, 22...Protruding portion forming a riding member, 22a...Tapered portion, 2
2b...Fixed portion, 23...Second roller member constituting the riding member, 23'...Protruding portion forming the riding member, 31...Stopper.

Claims (1)

[Claims for Utility Model Registration] The installation surface 5a of the lower mold 4 of the bolster 5 has an inverted T-shaped cross section extending from one side 5b of the bolster 5 to the opposite side 5c. It is inserted into and out of the inverted T-shaped groove 6 from one side 5b, and the lower mold 4 is inserted into the installation surface 5 of the bolster 5.
It is a device that lifts the lower mold 4 from a and releases it using rollers 18 for removing the lower mold 4, and includes a plate-shaped support member 11 inserted into the horizontal part 6b of the inverted T-shaped groove 6, and A bottom plate portion 17a inserted through the vertical portion 6a and located on the support member 11
The movable roller 18 has a pair of upright walls 17 rising along opposing inner walls of the vertical portion 6a, slightly protrudes from the upper end surfaces of the upright walls 17, and rotatably supports the roller 18 therebetween. Part 1
2, the support member 11 and the movable member 12
The screw 19 is inserted into a long hole 21 formed in the bottom plate portion 17a of the movable member 12 and is screwed into the screw hole 20 of the support member 11.
As a result, the movable member 12 is movably coupled to the support member 11 in the longitudinal direction and the vertical direction, and the support member 11 is connected to the tapered portion 22a and the tapered portion 2.
2a and a stationary part 22b having a certain height from the supporting surface of the movable member 12. On the other hand, the movable member 12 has a tapered part 22a of the protrusion 22 due to its movement. The movable member 1 rides on the stationary part 22b from the
The support member 11 has mounting members 23 and 23' that move the support member 2 perpendicularly to the support member 11, and one end of the support member 11 has an operation handle that rotates about a shaft member 13 provided at this one end. 14, and when the operation handle 14 is operated, the pressing protrusion 16 formed thereon comes into contact with the protrusion 15 extending outward from one end of the upright wall 17 of the movable member 12 and is pushed into the inverted T-shaped groove 6. A lower mold release device for use in a machine tool, characterized in that it has a stopper 31 that is pressed against the one side surface 5b of the bolster 5 when the lower mold is removed.