JPS6113935Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a blade receiver for a balance machine.Compared to conventional blade receivers, it is much simpler and has a structure that is easier to manufacture, but there is no difference in accuracy. On the contrary, we have made it possible to provide a uniform and highly accurate blade receiving device.

The conventional blade support device that supports the blade whose lower edge is a knife edge in a balance machine has a device that holds the valley-shaped blade support edge formed on the blade support piece in the left and right direction, and is positioned at different positions in the longitudinal direction of the blade support edge. Drill a pair of holes along the
By fitting the lower part of the ball into each hole and engaging the left and right balls with the left and right side surfaces of the lower edge of the blade, the lower edge of the blade is received on the blade receiver piece in a constant state. However, in order to do this, each hole must be drilled at a precise distance from the edge of the blade to the left and right, but since the location is on a slope, the tip of the drill is easily slippery, making it difficult to drill holes. requires skilled technique.

The present invention aims to solve the above-mentioned problems, and will be explained below with reference to an embodiment shown in the drawings.

1 is a blade receiving piece that is formed into a V shape and has a valley-shaped blade receiving edge 2
has. The opening angle of this blade receiving edge 2 is naturally larger than the V-shaped angle of the knife-shaped lower edge 4' of the blade 4 protruding from both sides of the ram 3, for example, 120 degrees. The blade receiver pieces 1 are arranged in pairs to support the blades 4, 4 protruding from both sides of the lever, respectively, and are attached to the support body 5 with the blade receiver edges aligned in a straight line. In this embodiment, the support consists of a U-shaped piece, the two upright parts of which have support grooves 5' with bottoms that match the shape of the underside of the blade receiver.
are cut from the upper end, and each support groove stably receives one blade receiving piece 1 on the bottom from below. In this embodiment, the left and right wing pieces 6, 6 of each blade receiving piece 1, which are open in a V-shape, are loosely fitted with the left and right opposing pieces 5a, 5a of the upright portion, which are opposed to each other with the support groove 5' in between. Notch 6
a and 6a are formed from the outer end, which will be described later. Therefore, the illustrated blade receiving piece 1 has a notch 6.
It can be formed by bending an H-shaped piece having a and 6a into a V-shape. Reference numeral 7 denotes a support shaft having a head 7a, which in this embodiment is shown as a screw having a male thread on the shaft portion 7b. The head of the screw must have a convex shape, such as a round head or a pot head, with the diameter becoming smaller towards the top. According to the present invention, a mounting hole 8 having a female thread is opened vertically on the blade receiving edge 2 in the blade receiving piece, the shaft portion 7b of the support shaft is attached to this hole, and the head 7a is attached to the blade receiving edge. 2 Make it stick out from above. In addition, in order to prevent the lower surface of the head 7a from floating above the blade receiving edge 2 because the lower surface of the head 7a is received by the left and right wing pieces 6, 6, the circumference of the mounting hole 8 is cut using a tool slightly larger than the diameter of the lower surface of the head 7a. Remove the meat from the upper surface of the wing with a
Advance the tool a little further downwards, form a large diameter part 8' at the top of the mounting hole 8, accommodate the lower part of the head in the large diameter part, and position the lower surface of the head slightly below the blade receiving edge 2. make it possible to do so.

A recess 9 with a length matching the diameter of the head 7a is provided on the lower edge of the blade 4 at a position where it hits the head 7a of the support shaft when placed on the blade receiving edge 2. so that it can straddle the head of the blade and rest on the edge of the blade. Therefore, the upward depth of the recess 9 needs to be greater than the height of the top surface of the head measured from above the blade receiving edge 2. Incidentally, it is preferable that the head 7a of the support shaft 7 is hardened to increase its hardness. Also, in this embodiment, the lower end of the shaft 7b of the support shaft attached to each blade receiver protrudes downward from the blade receiver, and the protruding lower end fits into the accommodation hole opened from above at the bottom of the support groove 5'. It is housed in 10. The inner diameter of this accommodation hole 10 is made slightly larger than the outer diameter of the shaft portion of the support shaft or the thread diameter, so that the blade receiving piece 2 can be placed on the bottom of the support groove with the support shaft 7 as the center as shown in FIG. It is made to be rotatable as shown in Figure 5, and also to be able to swing slightly in the lateral direction as shown in Figure 5, with a slight installation error between the pair of blade receiver pieces that support the blades protruding from both sides of the lever. It is desirable to be able to absorb this as well.

Although the present invention has been described with reference to one embodiment, the blade receiving piece 1 is not limited to being formed by bending a metal plate into a V shape as shown in the figure. A blade receiving edge is formed by cutting, and the lower surface may be flat, and the blade receiving edge is not limited to a V-shape, but may have a curvature.

If it is necessary to prevent the blade receiver piece from jumping out of the support groove 5', protrusions 11 may be punched out from the left and right opposing pieces 5a, 5a above the blade receiver piece after fitting into the support groove 5'. , or fix the screw through the skewer,
What is necessary is to provide a stopper to prevent it from coming off.

Therefore, according to the present invention, the lower edge 4' of the blade contacts the blade receiving edge 2 by straddling the head 7a of the spindle in the recess 9, and both side surfaces of the recess 9 contact the head 7a and extend in the longitudinal direction. be prevented from moving. Moreover, the head 7a of the spindle
Since the head 7a has a convex shape whose diameter becomes smaller toward the top, the contact position between the head 7a and the side surfaces 9a, 9a of the recess 9 is on the same surface as the upper surface of the blade receiving edge 2, making point contact. This does not impede the movement of the blade 4, which should swing together with the ram 3, in such cases.

Also, the shaft of the spindle is screwed into the mounting hole of the blade receiver piece, and the lower surface of the head of the spindle is accommodated in the large diameter part 8' at the upper end of the mounting hole so that it is lower than the top surface of the blade receiver edge. Since it is designed so that the head can be sunk in the vertical direction by rotating the support shaft, the top surface of the blade receiving edge can be sunk into the side surface 9 of the recess 9.
It is now possible to change the position of the head that makes point contact with a and 9a, and when the diameter of the lower surface of the head is relatively slightly larger than the length between the sides of the recess due to tolerance, the position of the head can be changed. The lower surface can be lowered than the upper surface of the blade receiving edge and adjusted to make point contact with the side of the recess at the small diameter point.

Moreover, only one mounting hole 8 needs to be opened perpendicularly on the blade receiving edge, and since the blade receiving edge is valley-shaped, it can be easily and accurately opened without requiring a skilled technique. The problem of drilling exactly two holes on the slope is completely eliminated.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the blade receiver according to the present invention, Fig. 2 is an enlarged view of the main part of the same as above, with a part of it cut away, and Fig. 3 shows the main part of the same part, also shown in cross section. An enlarged side view, Fig. 4 is an explanatory diagram when the blade holder piece is made rotatable, and Fig. 5 is an explanatory diagram when the blade holder piece is also made swingable. 4 is the receiving edge, 4 is the blade, 7 is the spindle, 7a is its head, 7b is also the shaft portion, and 9 is the recess provided in the blade.

Claims (1)

[Claim for Utility Model Registration] On the valley-shaped blade receiving edge formed on the blade receiving piece, a convex head whose diameter decreases upward is protruded at the end of the shaft portion having a male thread. A mounting hole is provided with a female thread into which the shaft of the supporting shaft is screwed, and the upper part of the mounting hole has a recessed large diameter portion into which the head of the supporting shaft can be inserted from the upper surface of the blade receiving edge. The support shaft is installed from above into the mounting hole of the blade receiving piece so that the head protrudes above the blade receiving edge, and the lower edge of the blade is fitted with a diameter that matches the diameter of the head of the support shaft in the length direction. A recessed portion having a length of 1. A blade receiving device for a balance machine, characterized in that the blade receiving device for a balance machine is moved vertically relative to the blade, and the position where the head of the support shaft contacts the recess can be adjusted vertically.