JPH0810464Y2 - Rail clamp structure for rail gas pressure welding machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail gas pressure welding machine which clamps rails to be joined together and pressurizes them while heating the joining portions with a gas burner, and more particularly to a rail clamp structure. is there.

[0002]

2. Description of the Related Art In this type of rail gas pressure welding machine, one of the rails to be joined and a support frame to which a pressure cylinder as a pressure source is attached are clamped as shown in Japanese Patent Publication No. 53-4060. The fixed frame and the fixed frame are arranged to face each other with a gap in the longitudinal direction of the rail, and a moving frame that clamps the other rail and is driven by a pressurizing cylinder is provided inward of the support frame. A burner case for supporting the gas burner is arranged between the movable frame and the fixed frame to have a schematic configuration. Then, each frame and the burner case are connected by a guide shaft as a common member to form the entire machine frame.

The rail clamp is, as shown in FIG.
Clamping frame 1 such as fixed frame and moving frame
00 and a movable chuck 106 fixed to a rod 104 of a clamp cylinder attached to the clamp frame 100.

The fixed chuck 102 is formed in a substantially L-shape that can be locked to the clamp frame 100 in order to obtain a pressure resistance at the time of pressurization, and is fixed by a set screw 108 with a protruding portion. Reference symbol P in the drawing indicates the pressing direction, and reference symbol C
Indicates the joint between the rails R ₁ and R ₂ .

[0005]

By the way, in the conventional clamp structure as described above, the set screw 104 is exposed to the flame or radiant heat of the burner and burns out early, and the clamp strength becomes unstable, or the fixed chuck is fixed. Had a problem of accidental dropout.

[0006] Therefore, an object of the present invention is to provide a rail gas pressure welding machine which can prevent the set screw from being burnt out and can maintain a good clamp strength for a long period of time.

[0007]

This invention was devised in order to achieve the above-mentioned object, and is characterized in that the fixed chuck is attached to the clamping frame through an insertion hole opened in the contact surface with the rail. In addition to being screwed, an uneven fitting portion is formed between the fixed chuck and the clamp frame so as to undulate substantially perpendicularly to the pressing direction of the rail.

Further, according to the present invention, teeth which stand up in the pressing direction of the rail can be formed on the contact surfaces of the fixed chuck and the movable chuck with the rail.

[0009]

According to the present invention, since the set screw of the fixed chuck is provided in a state where it is not exposed to the flame of the burner, burning of the set screw is avoided. Further, the pressure-resistant strength at the time of pressurization can be obtained by the fitting portion between the fixed chuck and the clamping frame.

Further, according to the present invention, when clamping, the teeth formed on the contact surface with the rail bite into the side surface of the rail, so that the clamp shift is avoided and a strong clamp state is achieved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 7 show an embodiment of the present invention, which is an example of application to a type in which a rail joint portion is covered and installed from above. As shown in FIGS. 1 and 2, the rail gas pressure welding machine 2 has rails (R ₁ , R ₂ ) to be joined.
The support frame 6 to which the pressurizing cylinders 4 and 4 are attached and the fixed frame 8 that clamps _one rail R ₁ to be joined and receives the pressurization are arranged to face each other at intervals in the longitudinal direction of A moving frame 10 driven by the pressurizing cylinder 4 is installed inward of the support frame 6, and each of the frames 6, 8 and 10 has a common position on both sides of the bottom and a top located above the rail. It is assembled with the guide shafts 14, 14, 14.

In addition, the fixed frame 8 and the movable frame 10
And a burner case 12 for supporting a gas burner, which is a heating source for the joint, between the three guide shafts 14.
It is installed in a detachable manner that can be put on from above.

Clamping cylinders 16 and 18 for clamping the rails R ₁ and R ₂ are attached to the fixed frame 8 and the movable frame 10, respectively, and the front of the movable frame 10 has a surplus after joining. A punching bite member 20 for pushing out is provided. Also, the moving frame 1
0 is the joint block 2 attached to the rear surface
2 and 23 are connected to the rod 24 of the pressurizing cylinder 4. Note that reference numeral 25 indicates an instruction scale provided on the upper surface of the moving frame 10, and reference numeral 26 indicates a moving distance indicating member attached to the support frame 6. Also,
Reference numeral 27 indicates a transport rod, and reference numeral 28 indicates a hanging bracket. Reference numeral 29 denotes a back plate attached to the rear surface of the moving frame 10 as a so-called reinforcing member at the time of pressing, and reference numeral 30 denotes a back plate on the fixed frame 8 side.

As shown in FIG. 3, the fixed frame 8 is formed in a substantially triangular shape with left and right shoulders cut, and a rail accommodating portion 45 is formed in the central portion. An insertion hole 46 for the guide shaft 14 is formed on each of the bottom and both sides and a top, and a mounting hole 47 for the clamping cylinder 16 is formed on one side. A fixed chuck mounting surface 48 is formed on the other side portion. Reference numerals 49 and 5
Reference numerals 0 and 51 respectively denote a cylinder lock screw hole, a screw hole for fixing the suspension fitting 28, and an insertion hole for the carrying rod 27.

FIG. 4 shows a fixed frame 8 and a movable frame 10.
2 is a schematic plan view showing the clamp structure in FIG. ₁ , in which the rail R ₁ of the fixed frame 8 is fixed to the frame main body, the fixed chuck 88, and the rod 1 of the clamp cylinder 16.
6a, the rail R ₂ in the moving frame 10 is fixed to the frame main body, and the movable chuck 91 is fixed to the rod 18a of the clamping cylinder 18.
It is clamped at and. The back plate 30 is attached to the rear surface of the movable chuck 89 of the fixed frame 8, and the back plate 29 is attached to the rear surface of the movable chuck 91 of the movable frame 10.

Explaining the fixed frame 8 side, a contact surface 88a having a shape along one side surface of the rail R ₁ is formed on the front surface side of the fixed chuck 88, and the contact surface 88a is formed on the rear surface side in the longitudinal direction of the rail R _1. An engaging projection 88b that engages with the fixed chuck mounting surface 48 of the fixed frame 8 is formed along with a fitting projection 88c that projects substantially perpendicularly to the rail pressing direction. In addition, the fixed chuck 88
Is formed with an insertion hole 88d opening to the contact surface 88a, and is fixed with a set screw 92 through the insertion hole 88d.

On the other hand, the fixed chuck mounting surface 48 of the fixed frame 8 has an engaging recess 48a which engages with the engaging protrusion 88b.
Are formed, and a fitting concave portion 48b that fits with the fitting convex portion 88c is formed. Reference numeral 48c indicates a screw hole of the set screw 92. The movable chuck 89 also has an insertion hole 89b that opens to the rail contact surface 89a, and is fixed to the rod 16a with a set screw 93.

Similarly, on the movable frame 10 side, a contact surface 90a is formed on the front surface side of the fixed chuck 90, and an engaging convex portion 90b and a fitting convex portion 90c are formed on the rear surface side. Further, the insertion hole 9 opened in the contact surface 90a.
0d is formed and is fixed by a set screw 92. The movable chuck 91 also has a contact surface 90a and an insertion hole 90b formed in the contact surface 90a. The insertion hole 90b is fixed to the rod 18a of the clamping cylinder 18 with a set screw 93.

According to the clamp structure of this example, pressure resistance is obtained by fitting the fitting protrusion 88c and the fitting recess 48b, and the set screw 92 is not exposed to the gas flame, so that it is burnt out. This can be avoided, so that the reliability of the clamp strength can be maintained for a long period of time. Moreover, since the cross section can be made substantially rectangular, the chuck shape can be made compact.

Further, in this example, each fixed chuck 88,
90, contact surfaces 88 of the movable chucks 89 and 91 with the rails
a, 90a, 89a, and 91a, as shown in FIG.
89e and 91e are formed. In this example, the rising angle θ ₁ was 30 °, the clearance angle θ ₂ was 75 °, the pitch pt was 3 mm, and the height h was 1.5 mm.

The teeth 88e, 90e, 89e, 91e are set in a shape that does not give a hindrance to the rail, and thus, the clamp displacement during pressurization can be prevented.

[0022]

According to the present invention, the set screw in the fixed chuck can be provided in a state where it is not exposed to the burner flame, and the pressure resistance can be obtained by the fitting portion, so that a strong clamp can be obtained for a long period of time. Can be maintained. Moreover, the shape of the fixed chuck can be made compact by fitting the concave and convex portions.

Further, according to the present invention, it is possible to obtain a strong clamped state without a clamp displacement.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a rail gas pressure welding machine according to the present invention.

FIG. 2 is a schematic side view of the same.

FIG. 3 is a schematic front view of a fixed frame.

FIG. 4 is a schematic sectional view showing a clamp structure in a fixed frame and a moving frame.

FIG. 5 is an exploded perspective view of a fixed chuck in a fixed frame.

FIG. 6 is a side view of a clamp structure in a fixed frame.

FIG. 7 is a cross-sectional view of an essential part showing a surface shape of a contact surface of a chuck with a rail.

FIG. 8 is a schematic plan view showing a conventional clamp structure.

[Explanation of symbols]

8 Fixed Frame (Clamping Frame) 10 Moving Frame (Clamping Frame) 16,18 Clamping Cylinder 16a, 18a Rod 88,90 Fixed Chuck 89,91 Movable Chuck 88d, 90d Insertion Hole 35b, 48b Fitting Recess (Fit) Part) 88c, 90c fitting convex part (fitting part) 88a, 89a, 90a, 91a contact surface 88e, 89e, 90e, 91e tooth R ₁ , R ₂ rail

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Katsuyoshi Ueyama 2-8, Hikarimachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute (72) Muneyuki Ohara 2-chome, Hikarimachi, Kokubunji, Tokyo No. 8 38 National Railway Technical Research Institute (72) Inventor Kunio Kitagawa 1122-1 Mizuno, Sayama City, Saitama Prefecture (72) Inventor Hiroto Yoshida 80-3 Kokubo, Hanno City, Saitama Prefecture (72) Inventor Masao Tanaka Saitama 2603-1, Sasai, Sayama, Japan (72) Fumio Tanaka, 33, Appina Shinden, Kawagoe City, Saitama Prefecture (72) Tatsuo Konno 3-4, Uchikanda, Chiyoda-ku, Tokyo Inside Mine Manufacturing Co., Ltd. (72) Inventor Toshi Kuwahara, 3-4, Uchikanda, Chiyoda-ku, Tokyo Stock Company, Mine Manufacturing Co., Ltd. (72) Inventor, Takahashi, etc. 3- 4-4, Uchikanda, Chiyoda-ku, Tokyo Company Mine Seisakusho (56) References Japanese Patent Publication No. 53-4060 (JP, B2) Japanese Publication No. 53-22932 (JP, B2) Japanese Publication No. 57-9916 (JP, B2) Japanese Publication No. Hei 2-36535 (JP) , B2)

Claims (2)

[Scope of utility model registration request] 1. A fixed chuck fixed to a clamp frame and exposed to one side of a rail, and a movable chuck fixed to a rod tip of a clamp cylinder attached to the clamp frame and exposed to the other side of the rail. In a rail clamp structure of a rail gas pressure welding machine for clamping a rail, the fixed chuck is screwed to the clamp frame through an insertion hole that opens in a contact surface with the rail, and the fixed chuck and the clamp frame are also provided. A rail clamp structure in a rail gas pressure welding machine, characterized in that an uneven fitting portion is formed between the rail and the rail in a direction substantially vertical to the rail pressing direction. 2. The rail clamp structure for a rail gas pressure welding machine according to claim 1, wherein teeth that stand up in a pressing direction of the rail are formed on contact surfaces of the fixed chuck and the movable chuck with respect to the rail.