JPH0418829Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a clamp claw device suitable for fixing a mold to a machine body mainly in an injection molding machine or a casting machine.

[Conventional technology]

Conventional clamp fittings used for this type of use are commonly used in which a substantially L-shaped clamp member with a fulcrum at one end is screwed to a jig or a mold using a clamp bolt.

[Problems that ideas should solve]

However, with this type of clamp fitting, once the clamp bolt is loosened, the position and orientation of the L-shaped clamp member cannot be determined, and the free end that presses the object to be clamped closes, making it impossible to hold the object. In the clamping operation, it is necessary to lift the clamp member 4 with one hand, open it, and move the object to be clamped, such as a mold, under the clamp claw 4b, and only one hand is required to move the object to be clamped. I had the inconvenience of not being able to use it.

[Means to solve the problem]

The clamp claw device for molds etc. related to this invention is
The purpose of this is to solve the above-mentioned problems and to obtain a clamp member configured such that the clamp member is held in the same position when the clamp bolt is loosened, and the object to be clamped 2 is attached to the main frame 1. It consists of a clamp member 4 that presses and locks, and a fulcrum member 5 that supports one end of the clamp member 4. A clamp bolt 7 is inserted between them to attach them to the main frame 1, and the fulcrum member 5 and the clamp are inserted. The feature is that a spring 6 is compressed between the member 4 and the member 4.

[Effect]

Even when the clamp bolt 7 is loosened, the clamp member 4 and the fulcrum member 5 do not move relative to each other due to friction caused by the spring 6 and gravity. That is, the clamp member 4 is always
Since the fulcrum member 5 exists directly below the clamp member 4, if you release your hand after pointing the clamp member 4 at a predetermined position in the desired direction, the free end of the clamp member 4 will remain open, so that it will not be covered. Clamp the fastened object with claw 4b
There is no need to support the clamp member 4 or the fulcrum member 5 by hand during the operation of moving the clamp member 4 to the lower surface and tightening the clamp bolt 7.

〔Example〕

This invention will be explained below with reference to the illustrated embodiment. In the figure, 1 is a main frame constituting an injection molding machine or a die-casting machine, and a mold 2, which is an object to be fastened, is placed on top of the main frame.
is listed. 3 is a clamp claw device which is the main part of this invention, and the mold 2 is connected to the clamp claw 4 at the tip.
A clamp member 4 that is extruded and locked by b, a fulcrum member 5 that supports the clamp member 4, a spring 6 that is compressed between both members 4 and 5, and a clamp bolt 7 that screws them onto the main frame 1. It is composed of the main parts.

The clamp bolt 7 is screwed into the main frame 1 through a long hole 4a provided in the clamp portion 4 and a bolt hole 5b provided in the seat plate 5a constituting the fulcrum member 5,
When it is tightened, the clamp member 4 clamps the mold 2, which is the object to be clamped, to the main frame 1. Reference numeral 5c denotes a support metal fastened to the seat plate 5a with bolts and nuts 8, and two permanent magnets 5d are attached to the lower surface of the support metal 5a. Also, the spring 6 is connected to the clamp bolt 7.
, and is compressed between the clamp member 4 and the fulcrum member 5. That is, the lower end of the spring 6 is connected to the seat plate 5.
The upper end of the clamp member 4 is supported by a washer 9 and pushes the clamp member 4 upward, and the clamp claw 4b formed at the tip of the clamp member 4 is kept open. Thus, the fulcrum member 5 is locked onto the main frame 1 by the permanent magnet 5d and the clamp bolt 7. Note that the permanent magnet 5d is not limited to this embodiment, and may be provided on the seat plate 5a, and furthermore, the seat plate 5a itself may be made of a permanent magnet.

The clamp member 4 is supported by a support 5c on one side, and is urged upward by a spring 6 on the other side, and its upward movement is caused by a spherical washer 10 being applied to the head 7a of the clamp bolt. Therefore, it is supported. Thus, the amount of opening of the clamp claw 4b is determined by the degree to which the clamp bolt 7 is loosened.

In FIG. 5, reference numeral 11 is a rubber O-ring which is a retaining member, and is fitted onto the clamp bolt 7 to prevent the clamp claw device 4 from disassembling when the clamp bolt 7 is not screwed into the main frame 1. It is worn. Note that although the O-ring 11 is inserted through the clamp bolt 7 at two locations, upper and lower, in the figure, substantially the same effect can be obtained even if only the lower one is used. Of course, only the upper one may be used.

According to this embodiment, the clamp member 4 and the fulcrum member 5 are tightened and released by the clamp bolt 7 as in the conventional case, but in this invention, the fulcrum member 5 is connected to the main frame 5 by the permanent magnet 5d. Since it is coupled upwardly, even if the clamp bolt 7 is loosened, the clamp pawl device 3 does not rotate around the clamp bolt 7 and is held at its original position. Further, since the clamp member 4 is also given an upward rebound by the spring 6 on the lower surface, the clamp claw 4b is always maintained in an open state and never closes, so that the main frame 1
It becomes easy to place the mold 2 on top and move it to the lower surface of the clamp claw 4b. Further, when performing the work of locking the mold 2 on the main frame 1 using the clamp claw device 3, there is no need to hold the clamp member 4 in the open position, and the clamp bolt 7
The engagement and disengagement work of the mold 2 can be performed only by tightening and loosening.

[Effect of idea]

According to this invention, even if the clamp bolt 7 is loosened, the clamp member 4 and the fulcrum member 5 will not move relative to each other due to the force of gravity due to the friction caused by the spring 6, so the clamp member 4 can be set in advance at a predetermined position and oriented in a desired direction. If this is done, it is not necessary to support the clamp member 4 or the fulcrum member 5 by hand during the work of moving the object to the lower surface of the clamp claw 4b and then tightening the clamp bolt 7, and the movement of the object will be reduced. You can use both hands for work, which has the effect of making the work easier.

In addition, as shown in the example, the clamp bolt 7
If an O-ring or other retaining member 11 is applied to the clamp member 4 and the fulcrum member 5, even if the clamp member 4 and the fulcrum member 5 are removed from the main frame 1, they will not be separated, resulting in an effect that the work can be performed easily. Furthermore, if a permanent magnet is formed on the lower surface of the fulcrum member 5, an effect is produced in which the clamp member 4 and the fulcrum member 5 can be opened in a desired direction.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a cross-sectional view in Figure 2, Figure 2 is a plan view of the device, Figure 3 is a cross-sectional view, Figure 4 is an external view showing the state of use, and Figure 5 is a diagram showing another embodiment. 1 is a sectional view equivalent to FIG. 4... Clamp member, 5... Fulcrum member, 5a...
...Seat board, 5c...Support money.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Consisting of a clamp member 4 that presses and locks the object 2 to the main frame 1 and a fulcrum member 5 that supports one end of the clamp member 4, a clamp bolt is inserted between them. 7 is inserted into the main frame 1, and a spring 6 is compressed between the fulcrum member 5 and the clamp member 4. (2) The clamp claw device for a mold or the like according to claim 1, wherein the clamp member 4 is screwed to the main frame 1 by a clamp bolt 7 via a ball washer 5c. (3) The clamp claw device for a mold or the like according to claim 1, wherein the clamp bolt 7 inserted between the clamp member 4 and the seat plate 5a is prevented from falling off by a retaining member 11.