JPS6136244Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an assembly type optometry table, which can easily hold a number of visual acuity charts with different configurations of the locking part, and is equipped with a heavy visual acuity chart equipped with a lighting device, etc. The present invention relates to an assembly type optometry table which can securely lock the table, is easy to process, and can be provided at an extremely low cost by unifying and rationalizing the materials of each constituent part.

Conventionally, there have been optometry tables that lock an eye chart, but none of them have an adjustment function in their locking portions, so the types of eye charts that can be locked are limited. For this reason, there are visual acuity charts from different manufacturers,
When a new type of visual acuity chart appeared, it was inconvenient that it could not be used. Furthermore, in recent years, visual acuity charts have been equipped with lighting devices, and as a result, the weight has been increasing year by year, so the safety of optometry tables has also been required.

Therefore, the object of this invention is to provide an assembly-type optometry table that satisfies the above-mentioned drawbacks and demands and can easily and safely lock vision charts of different configurations and heavy vision charts. It is something.

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

This invention consists of a pedestal 1, a support frame 2, and a slide body 3 as main components.

First, the pedestal 1 is made by arranging a pair of square pillars made of metal and having a rectangular cross section horizontally and in parallel.
Legs 5 to which casters 4 are attached are provided at the lower ends of each of the front and rear ends with the longitudinal direction of the prism as the front and rear ends. At this time, a stopper may be attached to either the front or rear caster 4. A prismatic frame 6 is arranged in series between the legs 5 to form a frame 1.

Next, the support frame 2 has a pair of square pillars similar to those of the pedestal 1 arranged vertically and parallel to each other, each of the square pillars has an opening at the upper end to form an insertion opening 7, and a support penetrating through the square pillars is provided on the upper side surface. A hole 8 is bored, and a support 10 with a fixed support plate 9 welded is formed on the side surface of the lower end.
An upper frame 11 made of square timber is installed in the upper part of the space between 0 and a lower frame 12 is installed in the same lower part, and a hole 13 that penetrates the upper frame 11 is provided in the center of the side surface of the upper frame 11. A locking screw 14 is inserted and formed.

At this time, the head of the locking screw 14 is covered with a coating 15 of rubber or the like, and is fixed with a nut 16 (see FIG. 4).

Further, a support screw 17 is formed in the support hole 8 so that it can be freely inserted into and removed from the support hole 8. At this time, the support screw 17 is provided with a knob 18 of an appropriate diameter on the head so that it can be easily rotated by hand, and is fixed with a nut 19 (see FIG. 2).

Next, in the slide body 3, a pair of square columns that can be inserted into the insertion opening 7 of the column 10 are arranged in the same manner as the column 10, and a support hole 20 that matches the support hole 8 of the column 10 is formed at an appropriate position on the side surface of the column. Install several slide pillars 2
1, and a plate-shaped locking frame 22 is connected to and formed on the cross section of the upper end of the slide column 21.

At this time, the locking frame 22 is provided with a groove-shaped rail hole 23 in the center of the plate surface, and a pair of hook screws 25 that can be inserted into and removed from the rail hole 23 and provided with a hook 24 on the head are inserted to lock the locking frame 22. Secure with nuts 26 (see Figure 3).

The slide body 3 configured in this manner is inserted into the insertion opening 7 of the support frame body 2, the support holes 8 and 20 of the support column 10 and the slide column 21 are aligned, and supported by the support screws 17, and then the support frame body 2 is erected on the leg 5 rearward from the center of the pedestal 1, and the fixed support plate 9 is fixed to the side surface of the leg 5 with bolts 27 and nuts 28 (see FIG. 5).

This invention is constructed as described above, and the upper part of the visual acuity chart with the illumination device etc. is attached with a hook screw 25.
It is used by fixing a string or the like attached to the lower part of the visual acuity chart to the locking screw 14.

However, the structure of the eye chart varies depending on the manufacturer, and there are two hook screws at the top of the eye chart.
It is not necessarily the case that a hole, a locking tool, etc. with which the number 5 matches is provided.

Therefore, according to this invention, the locking frame 22
By providing the rail hole 23 on the side, even if the width of the hole or the locking tool is different, the hook screw 25 can be moved left and right to adjust the width to the appropriate width. If a hook or the like is provided, it is possible to remove the hook screw 25 and lock it directly to the locking frame 22, etc.
Any eye chart from any manufacturer can be attached freely.

In addition, since the slide column 21 is supported by passing the support screw 17 through the support holes 8 and 20 of the slide column 21 and the support column 10, it is extremely easy to use even when a heavy eye chart is to be fixed at a high position. It is possible to securely support the frame 1, and in order to prevent it from losing its balance and falling forward in the above case, the support frame 2 is erected at a position closer to the rear of the center of the frame 1. It also has excellent safety considering the weight of the front part.

By providing a locking screw 14 in the center of the upper frame 11, the back side of the visual acuity chart board can be supported by adjusting the length of the locking screw 14, and the elevation angle of the board surface can be adjusted. Not only can it be kept in a vertical position, but it is also useful for locking a string attached to the lower end of the eye chart in a roll-up type eye chart.

A fixed support plate 9 having a substantially triangular shape is welded to the lower end of the column 10, and the fixed support plate 9 and the leg body 5 are connected with bolts 2.
7. Since they are connected with nuts 28, they do not require any extra material and can be connected firmly, and it is sufficient to connect the legs 5 with one frame 6. Therefore, it is extremely reasonable in terms of strength.

As the materials used to construct this device are hollow square timbers that form a tube with a square cross section, not only is there no wastage of material in constructing this device, but the whole device is lightweight, and It is easy to work with, and can also be made to be extremely durable.

Furthermore, this idea requires two bolts at key connections.
7 uses locking screws 14, by removing these bolts 27 and locking screws 14, the pedestal 1 and the support frame 2 are separated, and the slide body 3 is attached to the support frame 2. Since it can be easily removed, assembly and disassembly are easy, and it is convenient to handle, store, and transport.

As mentioned above, according to this invention, it is possible to easily and safely lock an eye chart made by any manufacturer, and it is lightweight and robust, and materials can be used extremely rationally, making it practical. It has various beneficial effects.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a perspective view, FIG. 2 is a partial cross-sectional view showing the slide column and support column supported by support screws, FIG. 3 is a partial cross-sectional view showing the hook screw fixed to the locking frame, and FIG. The figure is a partial sectional view showing how the locking screw is used, and FIG. 5 is a side view showing the state in which the fixed support plate connects the column and the leg body. 1... Frame, 2... Support frame, 3... Slide, 4... Caster, 5... Leg, 6... Frame, 7... Insertion port, 8... Support hole, 9... Fixed support plate, 10... Support column, 11... Upper frame, 12...
...lower frame, 13...hole, 14...locking screw, 1
5...Coating, 16...Nut, 17...Support screw, 18...Knob, 19...Nut, 20...
Support hole, 21... Slide column, 22... Locking frame, 23... Rail hole, 24... Hook, 25...
Hook screw, 26...wing nut, 27...bolt, 28...nut.

Claims (1)

[Scope of utility model registration request] A pair of square pillars made of metal and having a cylindrical shape with a square cross section are arranged horizontally and in parallel, and legs with casters attached to the front and rear lower ends are provided with the longitudinal direction of the pillars as front and back. A pair of prisms are arranged vertically and parallel to each other, each of the prisms has an opening at its upper end to form an insertion opening, and a support penetrating through the prisms is provided on the upper side surface. A hole is drilled, a fixed support plate is welded to the lower end side part, and a support is provided.A frame made of square timber is connected to the upper and lower parts between the supports, and is locked at the center of the side of the upper frame. A support frame body provided with screws is formed, and a pair of slide columns are provided in which an appropriate number of support holes are drilled through the square columns at appropriate positions on the side surfaces of the square columns that can be inserted into and removed from the insertion opening. A plate-shaped locking frame is connected to the upper front part, and a band-shaped rail hole is bored in the plate surface of the locking frame, and the rail hole can be inserted and removed freely, and a hook is attached to the head. A slide body is formed by inserting a pair of bolts provided with the mount, a support frame is vertically erected on the upper surface of the mount near the rear from the center, and the fixed support plate and the legs are fixed with bolts. A prefabricated optometry table characterized in that the lens is inserted into an insertion opening of a support frame body, each support hole is aligned and fixed with a support screw.