JPH0357520Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fixing device for a gate-shaped rail of a rail-type drawing machine, coordinate reader, etc.

Conventional technology In general, a rail-type drawing machine is attached to a drawing board using a combination of vertical rails and horizontal rails, and a ruler or coordinate reader is moved parallel to the drawing board along these rails. Generally, the vertical rail is fixed to a bracket member that moves along the horizontal rail at the connecting portion between the vertical rail and the horizontal rail.

Conventionally, in this fixing device, dovetail grooves are provided inside both side surfaces of the rail, a rail fixing piece is inserted into the dovetail groove, and the rail is attached to the bracket side plate with a screw member.

Problems to be solved by the invention Generally, gate-shaped rails are formed by extrusion molding of aluminum materials, but due to the characteristics of this molding method, the outer width of the rail is, for example, ±0.3 mm. The JIS standard also allows for some degree of error. Also, since rails made of aluminum are deformed by compressive force, in order to loosely fit and secure the rails to the bracket members, the inner width of the bracket side plates should always be 0.3 mm larger than the specified rail outer width. This is necessary.

As a result, if there is an error of -0.3 mm in the outside width of the rail, the inside width of the bracket side plate will be 0.6 mm larger than the outside width of the rail. Insert the rail fixing piece,
With the conventional fixing device that attaches the rail by pulling the rail fixing piece to the bracket side plate using a screw member, the problem is that the running surface of the carriage roller, which corresponds to the leg of the gate-shaped rail, deforms in the direction of widening the width. It was hot.

In order to prevent this deformation, the device described in Japanese Utility Model Publication No. 1840-1983, which was known before the filing date of the present invention,
A groove into which a set screw can be screwed from the outside is provided on the inside of the bracket side plate facing the dovetail groove, an outer bracket fixing piece is inserted into this groove, and the outer bracket fixing piece is fixed by the set screw. The rail side surface of the dovetail groove opening is clamped and fixed by a rail fixing piece that is pressed against the outer surface of the rail and pulled within the dovetail groove with a screw member.

However, in the case of this conventional device, it is necessary to provide a concave groove on the inside of the bracket side plate facing the dovetail groove into which the set screw can be screwed from the outside, which reduces the strength of the bracket side plate and makes the structure complicated and complicated. Not only is machining troublesome, but when fixing the rail, it is difficult to adjust the position of the outer bracket fixing piece in the groove and the rail fixing piece in the dovetail groove.
There is a problem in that even if the rail fixing piece is pulled too far with the screw member, or if the outer bracket fixing piece is pushed out too much with the set screw, the rail will be deformed and distortion will occur.

Furthermore, with the conventional fixing device that attaches the rail by inserting the rail fixing piece into the dovetail grooves on the inside of both sides of the rail and pulling the rail fixing piece to the bracket side plate with a screw member, Even if an attempt was made to use the dovetail groove as an insertion path for signal cables, brake wires, etc., there was a problem that the rail fixing piece 6 interfered with the use of the dovetail groove.

Means for Solving the Problems Therefore, in the present invention, a portal-shaped rail 1 having rail legs 9 below is fixed to a bracket member 2 having a bracket bottom plate and bracket side plates 3 and 4 on both sides thereof. In the rail fixing device configured as described above, the bracket side plates 3, 4 are arranged such that both side surfaces of the rail are loosely fitted inside the bracket side plates 3, 4 at a position where the lower ends of the rail legs 9 are in contact with the bracket bottom plate. A dovetail groove 5 is provided on the inner side of both sides of the rail, which is formed so that the outer width is narrower than the inner width of the rail.A rail fixing piece 6 having a screw hole 6a is inserted into the dovetail groove 5, and a screw member 7 is used. While both sides of the rail 1 are tightly fixed to the bracket side plates 3 and 4, a protrusion 10 is inserted into the dovetail groove 5 along the longitudinal direction of the rail 1 on the rail leg 9 facing the inside of at least one of the bracket side plates 3. A space 11 is provided between the rail 1 and the rail 1, which serves as an insertion path for a brake wire, etc. The present invention provides a rail fixing device that has the following features.

According to the device of the present invention described above, both side surfaces of the gate-shaped rail 1 are fitted inside the bracket side plates 3 and 4 at the position where the lower ends of the rail legs 9 are in contact with the bracket bottom plate, and both sides of the rail are fitted. Insert the rail fixing piece 6 into the dovetail groove 5 on the surface, pull the rail fixing piece 6 on one side using the screw member 7 of the bracket side plate 4 on one side, and attach one side of the rail position to one bracket side plate. 4, the set screw 1 provided on the bracket side plate 3 is attached to the protrusion 10 on the outer surface of the rail.
2, and in this state, touch the other bracket side plate 3.
The other side of the rail 1 can be fixed to the other bracket side plate 3 by pulling the rail fixing piece 6 in the dovetail groove 5 on the other side with the screw member 7 of the rail 1. Even if a groove 5 is provided, a rail fixing piece 6 is inserted into the dovetail groove 5, and the rail fixing piece 6 is pulled toward the bracket side plates 3 and 4 by the screw member 7 and the rail 1 is attached, the one bracket side plate Since the set screw 12 contacts and presses the protrusion 10 of the rail leg 9 corresponding to the inside of 3, the rail leg 9 is prevented from opening into the outer leather, and the rail is fixed without being deformed into a bracket member. can do. Furthermore, in the device of the present invention, even if the dovetail groove 5 of the rail 1 is used as a passage for inserting a brake wire or the like, the problem arises that it becomes obstructed by the rail fixing piece 6 and cannot be used. A protrusion 10 is formed along the longitudinal direction of the rail 1 on the opposing rail leg 9.
Since a space 11 is provided between the dovetail groove 5 and the dovetail groove 5, which serves as a passage for inserting a brake wire, etc., this problem can also be solved.

Embodiments The present invention will be described in detail with reference to the embodiments shown below. Reference numeral 1 denotes a gate-shaped rail, and the bracket member 2 includes a bracket bottom plate as a rail mounting frame and bracket side plates 3 and 4 on both sides thereof. In order to fit loosely between the side plates 3 and 4, the outer width thereof is formed to be narrower than the inner width of the bracket side plates 3 and 4. The rail 1 is integrally provided with dovetail grooves 5 on the inner sides of both sides, and is configured such that a rail fixing piece 6 having a screw hole 6a can be inserted into the dovetail groove 5. 7 is the bracket side plate 3, 4
By screwing the threaded portions into the screw holes 6a of the rail fixing piece 6 using screw members provided at the respective sides, the rail fixing piece 6 is drawn toward the bracket side plates 3 and 4, and the rail 1 is attached to the bracket member 2. It is configured to be tightly fixed. In the case of the embodiment, the rail 1 includes an inner frame and has gate-shaped rail legs 9 below the inner frame, and the inner surfaces 9a and 9b of the legs 9 form the running surfaces of the carriage rollers. ing. Further, on the outer surface of the rail leg portion 9 facing the bracket side plates 3 and 4, a protrusion 10 according to the present invention is integrally formed along the longitudinal direction of the rail 1. In the case of the embodiment, the rail 1 is attached to the rail leg 9 facing the inside of both bracket side plates 3, 4.
A projection 10 is integrally extruded with a space 11 between the dovetail groove 5 and the dovetail groove 5 along the longitudinal direction. It can be used as an insertion path for brake wires, etc. Reference numeral 12 denotes a set screw screwed into a portion of the bracket side plate 3 facing the projection 10, and the tip thereof is configured to abut against the projection 10. In the case of the embodiment, two screw members 7 and set screws 12 are provided in parallel in the longitudinal direction of the rail 1, but it goes without saying that the number and arrangement thereof can be changed as appropriate.

In the above configuration, both sides of the gate-shaped rail 1 are fitted inside the bracket side plates 3 and 4 at the position where the lower end of the rail leg 9 contacts the bracket bottom plate, and the dovetail grooves 5 on both sides of the rail are fitted. Insert the rail fixing piece 6 into the rail fixing piece 6, and pull the rail fixing piece 6 on one side using the screw member 7 of the bracket side plate 4 on one side to attach one side of the rail 1 to the one side bracket side plate 4.
Fix the rail 1 in close contact with the bracket member 2.
It can be temporarily fixed. In this temporarily fixed state, the set screw 12 provided on the other bracket side plate 3 is brought into contact with the protrusion 10 on the outer surface of the rail leg 9 on the other side, and the screw member 7 of the other bracket side plate 3 is used to tighten the other side. The other side surface of the rail 1 can be fixed to the other bracket side plate 3 by pulling the rail fixing piece 6 in the dovetail groove 5 on the side surface. At this time, the set screw 12 contacts and presses the protrusion 10 of the rail leg 9 facing the inside of the other bracket side plate 3.
By preventing the rail leg portions 9 from opening outward, the rail 1 can be fixed to the bracket member 2 without being deformed. In addition, when set screws 12 are provided on both side plates 3 and 4 of the bracket member 2,
After fitting and positioning the rail 1 between the side plates 3 and 4 of the bracket member 2, screw the setscrew 12 into the side plates 3 and 4 so that its tip abuts the protrusion 10, and then insert it into the dovetail groove 5. If the rail 1 is fixed by screwing the screw member 7 into the rail fixing piece 6 inserted into the rail fixing piece 6, there will be a gap between the inner width of the bracket side plates 3 and 4 and both sides of the rail, making it difficult to tighten the screw member 7. Accompanied by leg 9
Even if the rail 1 tries to open outward, the set screw 12 is in contact with the protrusion 10 of the leg 9, so the rail 1 can be attached and fixed to the bracket member 2 without being deformed.

Furthermore, in the device of the present invention, even if the dovetail groove 5 of the rail 1 is used as a passage for inserting a brake wire or the like, the problem arises that it becomes obstructed by the rail fixing piece 6 and cannot be used. This problem is also solved by providing a projection 10 on the opposing rail leg portion 9 along the longitudinal direction of the rail 1 with a space 11 between the dovetail groove 5 and the space 11 serving as an insertion path for a brake wire, etc. can do.

Effects As described above, according to the rail fixing device according to the present invention, the gate-shaped rail 1 having the rail legs 9 below is attached to the bracket member 2, which includes a bracket bottom plate and bracket side plates 3 and 4 on both sides thereof. In the rail fixing device, the bracket side plate 3 is fixed such that both side surfaces of the rail fit loosely inside the bracket side plates 3 and 4 at a position where the lower end of the rail leg 9 contacts the bracket bottom plate. ,4
A dovetail groove 5 is provided on the inner side of both sides of the rail, which is formed so that the outer width is narrower than the inner width of the rail.A rail fixing piece 6 having a screw hole 6a is inserted into the dovetail groove 5, and a screw member 7 is used. While both sides of the rail 1 are tightly fixed to the bracket side plates 3 and 4, a protrusion 10 is inserted into the dovetail groove 5 along the longitudinal direction of the rail 1 on the rail leg 9 facing the inside of at least one of the bracket side plates 3. A space 11 is provided between the rail 1 and the bracket member 2, and the protrusion 10 is pushed by a set screw 12 provided on the bracket side plate 3.
Since it has a structure in which the rail is fixed to the bottom plate of the bracket, the strength of the bracket side plate is not reduced, and the structure is simple and easy to process.
Fit both sides of the gate-shaped rail 1 to the inside of the bracket side plates 3 and 4 at the position where the lower ends of the rails touch,
Insert the rail fixing pieces 6 into the dovetail grooves 5 on both sides of the rail, pull the rail fixing pieces 6 on one side with the screw members 7 of the bracket side plate 4 on one side, and attach one side of the rail 1 to the other side. The bracket side plate 4 is tightly fixed and the gate-shaped rail 1 is attached to the bracket member 2.
With the rail leg 9 on the other side temporarily fixed, the set screw 12 provided on the other bracket side plate 3 is brought into contact with the protrusion 10 on the outer surface of the rail leg 9 on the other side, and then the other side bracket side plate 3 is fixed.
The other side of the rail 1 can be tightly fixed to the other bracket side plate 3 by pulling the rail fixing piece 6 in the dovetail groove 5 on the other side using the screw member 7, and special positioning adjustment is required. The fixing work of the rail 1 is completed easily and accurately, and at this time,
Since the set screw 12 contacts and presses the protrusion 10 of the rail leg 9 facing the inside of the other bracket side plate 3, the rail leg 9 is prevented from opening outward and the rail 1 is secured to the bracket member 2. This has the effect of being able to be fixed without deformation.

Furthermore, in the device of the present invention, even if the dovetail groove 5 of the rail 1 is used as an insertion path for a brake wire or the like, there is a problem that it becomes obstructed by the rail fixing piece 6 and cannot be used. This can be achieved by providing a protrusion 10 along the longitudinal direction of the rail 1 on the rail leg 9 facing the inner side of the dovetail groove 5, with a space 11 between it and the dovetail groove 5, which serves as an insertion path for a brake wire, etc. It has the effect of solving problems.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a main part of an embodiment of the device of the present invention, and FIG. 2 is a side view of the main part. 1... Gate-shaped rail, 2... Bracket member, 3, 4... Bracket side plate, 5... Dovetail groove,
6...Rail fixing piece, 7...Screw member, 9...Rail leg, 10...Protrusion, 12...Press screw.

Claims (1)

[Scope of utility model registration request] In a rail fixing device, a gate-shaped rail 1 having rail legs 9 below is fixed to a bracket member 2 having a bracket bottom plate and bracket side plates 3 and 4 on both sides thereof. The bracket side plates 3 and 4 are arranged so that both side surfaces of the rail fit loosely inside the bracket side plates 3 and 4 at the position where the lower ends of the legs 9 abut.
A dovetail groove 5 is provided on the inner side of both sides of the rail, which is formed so that the outer width is narrower than the inner width of the rail. Bracket side plates 3, 4
While fixing both side surfaces of the rail 1 in close contact with each other, a protrusion 10 is placed along the longitudinal direction of the rail 1 on the rail leg 9 facing the inside of at least one side plate 3 of the bracket, and a brake is inserted between the protrusion 10 and the dovetail groove 5. In addition to providing a space 11 that serves as an insertion path for wires, etc.,
A rail fixing device in which the rail 1 is fixed to the bracket member 2 by pressing the protrusion 10 with a set screw 12 provided on the bracket side plate 3.