JPS638980Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an anti-slip device for an abacus.

Generally, when the left hand holding the abacus abacus was released to turn over a slip, etc., the abacus tended to move easily, and the beads were misaligned, often resulting in miscalculations.
Therefore, conventionally, in order to prevent the abacus from moving around on the desk, a non-slip rubber plate was glued to the bottom of the side frame of the abacus, or a rubber piece was fitted in a removable manner. However, those with rubber plates glued to them cannot be removed when not in use, so when calculating while moving the abacus, the paper surface will also shift, making calculations difficult. It must be attached when tallying slips, etc., and removed when calculating shifts, but it is time-consuming to attach and detach, and has drawbacks such as the rubber pieces being easily lost.

The present invention eliminates the various drawbacks of the conventional methods as described above, and allows the abacus to be firmly fixed even if the left hand is removed when tabulating slips. It is designed to be easily switched so as not to become a hindrance.

In addition, the anti-slip device according to the present invention is easy to attach to the abacus body, and can be used without damaging the outside of the thin abacus frame, even if the outside of the abacus frame is not only flat but has various deformations due to its design. This allows for accurate installation.

Next, an embodiment of the present invention will be explained with reference to the drawings.
Reference numeral 1 indicates the upper wall of the abacus frame, 2 indicates the lower wall, and 3 indicates the left side wall, and a pair of shaft holes 4 and 5 are provided inside the upper and lower walls 1 and 2 near the left side wall 3 on the back side of the abacus frame. 6 and 7
shows stop holes attached to both sides of the shaft hole 4 in the upper wall.

Reference numeral 8 is an inversion plate having a length that fits between the upper and lower walls 1 and 2 and having a flat non-slip part 9 made of a rubber plate on one side, and a bearing part 10 is provided at one end in the longitudinal direction. An engaging edge 11 extends on the side. 12
indicates a short locking piece protruding from the upper end of the reversing plate 8. Reference numerals 13 and 14 are two thin shafts, and a spring 15 is inserted between the two shafts 13 and 14 to connect the bearing portion 1.
The shaft 13 and the bearing part 10 are fixedly attached to each other, and the protruding ends of both shafts 13 and 14 are fitted into the shaft holes 4 and 5 in the upper and lower walls. Therefore, the engaging edge 11
When it comes into contact with the lower surface of the left side wall 3, the locking piece 12 locks into the stopper hole 6, and the anti-slip part 9 protrudes slightly from the lower end of the abacus frame, and when it is reversed, the locking piece 12 locks into the stopper hole 7. However, the back side of the anti-slip part is located inside the lower end surface of the abacus frame.

In the above example, the reversing plate 8 can be reliably fixed by engaging the retaining pieces 12 in the retaining holes 6 and 7, but the reversing plate 8 is fixed due to the elasticity of the spring 15.
Since the upper end is crimped to the upper wall 1, the stop holes 6, 7 and the lock piece 12 are not necessarily required.

Further, in the above example, the upper end of the reversing plate 8 was pressed to the upper wall 1, but the lower end of the reversing plate 8 was pressed to the lower wall 2.
The same effect can be obtained even if it is configured so that it is crimped.

Further, in the above example, the present device was installed near the left side wall 3 of the abacus, but it can be similarly installed near the right side wall if necessary.

As described above, in the present invention, the length is made to fit between the upper and lower walls of the abacus frame, a bearing is provided at one end in the longitudinal direction, and an engaging edge is extended at the other end, and the above-mentioned A non-slip part is provided on one side between the bearing part and the engagement edge to form a reversing plate, and a pair of shafts are inserted into the bearing part of the reversing plate with a spring sandwiched between them, and one of the shafts has an end. In addition to protruding and fixing to the bearing part, the protruding ends of both shafts are installed in the shaft holes provided inside both the upper and lower walls near the side wall on the back side of the abacus, and the engaging edge is attached to the lower surface of the side wall to prevent slipping. protrudes slightly from the bottom edge of the abacus frame,
It is configured such that the back side of the anti-slip part is located inside the lower end surface of the abacus frame when it is reversed.

Therefore, in the present invention, the engaging edge is fixed in contact with the lower surface of the side wall, and the anti-slip portion slightly protrudes from the lower end surface of the abacus frame and adheres well to the desk surface, etc., so that this slip is prevented. During calculations with the abacus equipped with the device, even if the left hand holding the abacus is frequently released to turn over slips, the abacus does not slip, and calculation errors caused by the position of the beads being unintentionally shifted are eliminated.

Furthermore, when the reversing plate is rotated 180 degrees to the opposite side, the anti-slip portion faces upward and is fixed within the abacus frame, so it does not interfere in any way when calculating while shifting the abacus from the front to the front.

Furthermore, with the present invention, the reversing plate can be easily reversed by hooking the toe on the engaging edge, making it extremely easy to switch between use and non-use, which is very convenient to use, and eliminates the risk of loss. Not at all.

In particular, in the present invention, after assembling the abacus body using an inverted plate and forming the frame so that the lower end surface of the frame is evenly adhered to a flat surface, shaft holes are drilled inside both the upper and lower walls and the abacus body is assembled. The installation work is easy, it can be installed accurately, and there is no risk of deformation after many years of use. Since the outside of the frame is not damaged at all, there is no damage to the appearance, and even if the outside of both the upper and lower walls are deformed in various ways due to design, such as sloped surfaces, concave arc surfaces, convex arc surfaces, dog-shaped surfaces, etc. It can also be installed in the same way. Furthermore, it has the advantage that it can be reliably attached to the latest thin Sorovans, that is, Sorovans with low frames.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a back view of the left side of the abacus, Fig. 2 is an enlarged sectional view taken along line A-A in Fig. -A cross-sectional view taken along line B is shown. 4, 5... Shaft hole, 8... Reversing plate, 9... Anti-slip part, 10... Bearing part, 11... Engaging edge, 13,
14... shaft, 15... spring.

Claims (1)

[Scope of utility model registration request] The length is made to fit between the upper and lower walls of the abacus frame, and a bearing is provided at one longitudinal end of the abacus frame, an engaging edge is extended to the other end, and a bearing is provided on one side between the bearing and the engaging edge. A non-slip part is provided to form a reversing plate, and a pair of shafts are inserted into the bearing part of the reversing plate with a spring sandwiched between them.
One of the shafts has its end protruding and is fixed to the bearing part, and the protruding ends of both shafts are installed in the shaft holes provided inside the upper and lower walls near the side wall on the back side of the abacus, and the engaging edge is fixed to the bearing part. This anti-slip device for an abacus has a non-slip part on the lower surface of the side wall when in contact, which slightly protrudes from the lower end surface of the abacus frame, and the back side of the non-slip part when inverted is located inside the lower end surface of the abacus frame.