JPS591840Y2 - Rail fixing device - Google Patents

Description

[Detailed description of the invention] The present invention generally relates to a device for fixing a box-shaped rail.
In particular, the present invention relates to a device for tightening and fixing the rails of a track-type flexible parallel ruler without deformation, by attaching a combination of vertical rails and horizontal rails to a drawing board, and running the ruler on the drawing board along these rails.

Generally, the vertical rail 1 of a track type flexible parallel ruler is formed by extrusion molding of aluminum material, and when attaching this vertical rail 1 to a bracket member 5, as shown in FIG. , lb, the bracket fixing pieces 3a, 3b are fitted into the dovetail grooves 2a, 2b provided on the vertical rail 1, and the bracket side plates 4a are fitted on both sides 1a, lb of the vertical rail 1.
, 4b are located on the side of the bracket side plates 4a, 4b of the bracket member 5, and the nine flat head machine screws 6 having the heads 7 are screwed into the bracket fixing pieces 3a, 3b and the bracket side plates 4a, 4b. The vertical rail 1 was fixed by being screwed in so as to be pulled outward in the width direction.

However, according to the conventional vertical rail fixing device, since the vertical rail 1 is formed by extrusion, it is very difficult to control the dimension between the outer width of the vertical rail 1 and the inner width of the bracket member 5, and the vertical rail 1 is distorted. bracket member 5 without causing
It was difficult to install and fix it.

For example, the vertical rail 1 having an outer width larger than the inner width of the bracket member 5 is attached to the bracket side plate 4a.

4b, the vertical rail 1 is deformed in a direction in which the width is compressed, and the carriage roller running surfaces 8a, 8 on both sides formed by extrusion at the center of the vertical rail 1 are
b is also deformed in the direction in which the width becomes narrower, which has the disadvantage that the carriage roller (not shown) has to travel more slowly.

On the other hand, if the inner width of the bracket member 5 is considerably larger than the outer width of the vertical rail 1, the both sides 1a and lb of the vertical rail 1 may be forcibly pulled outward in the width direction using the nine flat head machine screws 6. Therefore, the carriage roller running surfaces 8a and 8b are also running surfaces Ba.

8b is deformed in the direction of increasing the distance, which has the disadvantage of causing play in the running of the carriage roller.

Therefore, the work of attaching the vertical rail 1 to the bracket member 5 is a work of matching the actual parts, which is extremely inefficient and has poor workability.

On the other hand, if the cross-sectional shape of the vertical rail 1 is made considerably thick in order to avoid the deformation of the vertical rail 1, which is the above-mentioned drawback, the weight of the vertical rail 1 as a whole increases, and the cost increases.

Furthermore, if the vertical rail 1 is made stronger, the bracket member 5 will deform more than before, so the strength of the bracket member 5 must also be improved, which will further increase the manufacturing cost. There are some drawbacks.

An object of the present invention is to provide a rail fixing device that facilitates dimensional control and that tightens and fixes rails in a track-type flexible parallel ruler without causing deformation or distortion.

The present invention, which is distantly related to this purpose, provides dovetail grooves on the inside of both sides of the box-shaped rail, which is formed so that the outer width is always narrower than the inner width of the bracket member that has bracket side plates on both sides. Insert the inner bracket fixing piece into this dovetail groove and attach it to the bracket side plate with a screw member, while providing a groove on the inside of at least one bracket side plate, insert the outer bracket fixing piece into this groove, and attach it with a set screw. The gist is that the outer bracket fixing piece is pressed against the side surface of the rail to fix the rail to the bracket member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 is a sectional view showing a state in which the vertical rail 11 is fixed to the rail fixing device A of the present invention.

This rail fixing device A has a U-shaped bracket member 10 with an upwardly opened cross section that supports a vertical rail 11 from both sides.

A U-shaped upper lid part 12 having a substantially downward cross section is formed on the upper surface of the vertical rail 11.
A carriage roller running section 13 and a vertical rail mounting section 14, 15 are formed at a lower position.

A space 16 is formed between the upper lid part 12 and the carriage roller running part 13, in which a counterweight (not shown) runs.

Vertical rail side parts 1 provided on both sides of the upper lid part 12
The outer width between 7 and 18 is set to be always larger than the inner width of the bracket member 10.

Bracket side plates 20 are provided on both sides of this bracket member 10.
．． 21 is provided, the bracket side plate 20 faces the vertical rail side part 17, and the bracket side plate 21 faces the vertical rail side part 1B.
is facing.

The bracket side plate 20 is provided with four screw holes 22, 23, 24 and 25, as shown in FIG.

Round countersunk machine screws 26 and 27 are screwed into the screw holes 22 and 25, and set screws 2B and 29 are screwed into the screw holes 23 and 24, respectively.

The bracket side plate 21 has screw holes 31 and the like into which nine-head machine screws 30 and the like are screwed.

In the vertical rail mounting parts 14 and 15, inner bracket fixing piece insertion dovetail grooves 34.35, which are located inside the vertical rail 1 and into which the inner bracket fixing pieces 32.33 are inserted, are provided along the longitudinal direction of the vertical rail 1. It is formed by

On the other hand, outer bracket fixing piece insertion grooves 37 into which outer bracket fixing pieces 36 are inserted are formed at two locations on the inside of the bracket side plate 20, facing the bracket fixing piece insertion dovetail grooves 34.

This outer bracket fixing piece 36 is pressed by the set screws 28, 29 and presses the vertical rail side portion 17 to the right in FIG.

This state is shown in FIG.

Since the inner width of the bracket member 10 is always slightly larger than the outer width of the vertical rail 1, there is a gap 19 between the vertical rail 1 and the bracket member 10, as can be understood from FIG. Even if the outer bracket fixing piece 36 is pushed to the right by the set screws 28 and 29, no deformation occurs in the vertical rail 1.

After the vertical rail 1 is temporarily fixed by the outer bracket fixing piece 36, insert the round head machine screws 26.27 into the screw holes 22.25 of the bracket side plate 20 and the inner bracket fixing piece 36.
The outer bracket fixing piece 36 and the inner bracket fixing piece 32 fasten and fix the vertical rail side part 17 in a sandwich-like manner.

Another embodiment of the invention is shown in FIG.

The set screw 40 used in this embodiment has a male thread 38 formed on the outer circumferential side, and at the same time, an insertion hole 38 is formed on the inner circumferential side.
9 is formed.

Round countersunk machine screws 26 and 27 are inserted into the insertion holes 39, and the vertical rail side portions 17 are fastened and fixed in a sandwich-like manner by the outer bracket fixing pieces 36 and the inner bracket fixing pieces 32.

In this way, according to the rail fixing device of the present invention, the outer width of the rail is always narrower than the inner width of the bracket member,
and a rail for fixing the rail by pushing the rail side part from the bracket member by the push screw and the outer bracket fixing piece, and at the same time pulling it toward the bracket side plate by the inner bracket fixing piece inserted into the dovetail groove and the screw. This has the effect that installation deformation does not occur.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a rail fixing device according to the prior art;
The figure is a sectional view of the rail fixing device of the present invention, Figure 3 is a side view showing the state in which the vertical rail is attached to the bracket member, and Figure 4 is a side view of the rail fixing device of the present invention.
The figure is a partial cross-sectional view showing a state in which the outer bracket fixing piece is pressed by a set screw, and FIG. 5 is a partial cross-sectional view showing a main part of another embodiment of the present invention. A...Rail fixing device, 10...Bracket member,
11... Vertical rail, 17.1B... Vertical rail side part,
20.21...Bracket side plate, 26.27.30.
...Nine flat head machine screw, 28.29...Press screw, 32.33
...Inner bracket fixing piece, 34.35...Dovetail groove for inserting inner bracket fixing piece, 36...Outer bracket fixing piece, 37...Groove for inserting outer bracket fixing piece.

Claims (1)

[Scope of utility model registration request] Dovetail grooves are provided on the inside of both side surfaces of the box-shaped rail, which is formed so that the outer width is always narrower than the inner width of the bracket member with bracket side plates on both sides, and the inner bracket fixing piece is inserted into this dovetail groove. At the same time, a groove is provided inside at least one of the bracket side plates, and an outer bracket fixing piece is inserted into this groove, and the outer bracket fixing piece is pressed against the side surface of the rail using a set screw. A rail fixing device for fixing the rail to a bracket member.