JPH0444376Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a method for horizontally attaching the base end of an arm whose tip supports a heavy object to the vertical axis of a vertically installed support. The present invention relates to a mounting structure for an arm for supporting heavy objects.

(Prior art) Conventionally, in order to attach an arm for supporting an object to a vertical shaft in a horizontal state at one end thereof, a common method is to fit the vertical shaft into a vertical hole provided in the arm and fix it. It is true.

(Problem that the invention aims to solve) However, in such a mounting structure, if the object supported by the arm is heavy, a large downward moment will act on the arm, so the load will cause There was a problem in that the vertical hole expanded, causing so-called hole backlash, which caused the arm to tilt downward. And due to such problems,
For example, when the object to be supported is a display device, the device is supported in an inclined state, resulting in problems such as practical inconvenience and poor appearance.

In addition, to solve the above problem, the part around the vertical hole in the arm is made thicker using a special material with particularly high hardness, or the vertical axis is provided with a mounting flange that makes surface contact with the arm. This problem can also be addressed to some extent by strengthening the mounting structure, such as by screwing the arm at multiple locations. but,
These methods are undesirable from the viewpoint of workability because they increase the number of parts and the number of assembly steps.

Therefore, the technical problem to be solved by the present invention is to enable the base end of an arm whose distal end supports a heavy object to be mounted horizontally to the vertical axis using a simple mounting structure.

(Means for solving the problem) The technical means for solving the above problem is to provide a vertical shaft with a protrusion in the axial direction at the top and form it into a pipe shape. A shaft hole with the same shape as the cross section of the vertical shaft is provided in the lower wall of the proximal end of the arm whose tip supports a heavy object, and a shaft hole with the same shape as the cross section of the vertical shaft is provided in the upper wall. A mounting hole with the same shape as the cross section of the protrusion is provided at a position slightly closer to the tip than the part where the protrusion will come into contact when inserted at right angles, and the vertical shaft is inserted into the shaft hole, and the protrusion is inserted into the mounting hole. The arm is attached to the vertical axis by fixing the protrusion and the arm with a fixing member in a state where the protrusion is inserted.

(Function) By fixing the arm with the fixing member, the arm is positioned with respect to the vertical axis. At this time, since the mounting hole is provided slightly closer to the tip of the protrusion, the upper wall of the arm receives a strong rearward pressing force from the protrusion. Therefore, the entire arm is fixed to the vertical axis with the tip slightly tilted upward. The degree of inclination of the arm corresponds to the amount of eccentricity of the mounting hole with respect to the protrusion.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 3.

At the rear of the printing device 2 of the printing device assembly 1, an additional device 3 housing a circuit board for adding a word processor function to the printing device 2 is attached.
A support post 5 is inserted into the frame.

The column 5 has a vertical shaft 6 fitted vertically into the support hole 4.
The cover 8 is formed to surround the vertical shaft 6 and is fixed to the vertical shaft 6 by a pin 7. The vertical shaft 6 is rotatable around the axis inside the support hole 4, and the pin 7
The vertical shaft 6 can also be fixed to the support hole 4 by projecting it to the outside of the cover 8 and fitting it into a positioning groove 9 provided at the edge of the support hole 4 .

Next, the top part 10 of the vertical shaft 6 formed on a substantially horizontal flat surface has a vertical axis at a position eccentric by a predetermined width a to one side (to the right in FIG. 2) with respect to the axis of the vertical shaft 6. A vertical screw 11 is integrally provided.

A rear end portion of a pipe-shaped arm 12 is attached to the upper end portion of the vertical shaft 6 configured in this manner. That is, the vertical axis 6 is attached to the lower wall portion 13 of the arm 12.
A shaft hole 14 having the same shape as the cross section of is provided, and a mounting hole 16 having the same diameter as the vertical screw 11 is provided in the upper wall portion 15 at the rear of the shaft hole 14 by a width b slightly smaller than the width a. The upper end portion of the vertical shaft 6 is fitted into the shaft hole 14, and the top portion 10 of the vertical shaft 6 is provided at a position eccentric to the right side in FIG.
5, the vertical screw 11 is fitted into the mounting hole 16, and the vertical screw 11 protrudes from the mounting hole 16.
A nut 17 is screwed into the holder in a tightened state.

A cover 18 is attached to the outer periphery of the arm 12, and the front end of the arm 12 is configured such that a display device 19 connected to the additional device 3 can be attached thereto (not shown).

This embodiment is constructed as described above and has the following effects.

That is, the nut 17 is tightened to the vertical screw 11 with the vertical shaft 6 fitted into the shaft hole 14 and the vertical screw 11 fitted into the mounting hole 16 which is slightly eccentric toward the front. , the rear end edge of the mounting hole 16 is strongly pressed rearward by the vertical screw 11. On the other hand, since the front end edge of the mounting hole 16 has a clearance with respect to the vertical screw 11 corresponding to the eccentricity described above, it is not subjected to the pressing force by the vertical screw 11. Therefore, the upper wall 15 of the arm 12 as a whole receives a strong rearward pressing force, whereas no such force acts on the lower wall 13 of the arm 12, so that the front end of the arm 12 rises slightly. It is fixed to the vertical shaft 6 in an inclined state.

When the display device 19, which is a heavy object, is supported at the tip of the arm 12, the load causes a slight play in the mounting hole 16, causing the arm 12 to move downward. held in a horizontal position.

Further, in this embodiment, the vertical screw 11 is connected to the vertical axis 6.
Since the nut 17 is tightened, the portion of the upper wall portion 15 that is in contact with the top portion 10 is strongly tightened toward the rear, and therefore the portion closer to the front is tightened. is relatively floating, and the arm 12 is more firmly fixed in the above-mentioned inclined state with the front end raised. Furthermore, since the portion of the top portion 10 that is closer to the front than the vertical screw 11 is formed wider, this portion acts more effectively as a fulcrum that resists the downward inclination of the front end of the arm 12. Therefore, a heavier display device 19 can be supported.

Furthermore, in this embodiment, the display device 19 is supported above the printing device 2, etc., so that the table of the printing device assembly 1, etc. This has the advantage that the installation area for the display device 19 is small, and the display device 19 can be rotated about the vertical axis 6 to freely change the direction of the screen.

Note that the location where the vertical screw 11 is formed on the top portion 10 is not limited to the above embodiment, and at least the mounting hole 1
It is sufficient if the relative position with respect to 6 is as in the above embodiment. Also, instead of the vertical screw 11, the top 10 of the vertical shaft 6
A rod-shaped protrusion extending in the axial direction may be provided in the protrusion, a circumferential groove or a pin hole may be provided at a predetermined height position of the protrusion, and the protrusion and the arm 12 may be fixed with a snap spring or pin. . Furthermore, the present invention is not limited to the above-described embodiments, but can be generally applied to an arm mounting structure when supporting a heavy object with an arm substantially horizontally mounted on a shaft provided in the vertical direction.

(Effects of the invention) This invention has the effect that the base end of the arm, which supports a heavy object at the tip, can be mounted horizontally to the vertical axis without increasing the number of parts or assembly man-hours, using a simple mounting structure. There is.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of one embodiment of the present invention, Figure 2
The figure is an exploded sectional view of the vertical axis and the arm, and FIG. 3 is a perspective view showing the entire embodiment. 6... Vertical axis, 10... Top, 11... Vertical screw,
12...Arm, 14...Shaft hole, 16...Mounting hole, 17...Nut.

Claims (1)

[Claims for Utility Model Registration] An arm having a vertical shaft with a protrusion in the axial direction formed at the top, and which is formed into a pipe shape so that the tip supports a heavy object. A shaft hole with the same shape as the cross section of the vertical shaft is provided in the lower wall of the proximal end, and
A mounting hole having the same shape as the cross section of the protrusion is provided in the upper wall portion at a position slightly closer to the tip than the part where the protrusion comes into contact when the vertical shaft is inserted into the shaft hole at right angles, An arm for supporting heavy objects, characterized in that the arm is attached to the vertical shaft by fitting the vertical shaft into the shaft hole and fixing the arm to the projection by a fixing member with the projection fitted into the mounting hole. Mounting structure.