JPS6042004Y2 - Hole chamfer for rails - Google Patents

Description

[Detailed description of the invention] Railway track rails are connected by placing joint plates on both sides of the rail abdomen and firmly tightening them with bolts and nuts through bolt holes.

It is also specified that both end surfaces of the bolt holes drilled in the rail are chamfered to a depth of 1.5 mm.

The currently used large chamfering machines for chamfering have a chamfering milling structure that can be used for bolt holes with only one diameter. At present, the assembly work method involves inserting a conical abutment, ratchet bundle, etc. onto the milling shaft, rotating the ratchet bundle, and simultaneously turning the feed screw to perform chamfering, which is inefficient and takes a lot of time. It is.

According to this invention, the hole diameter is 24r for rails of various sizes.
It can be used from trm to 32mm, and is easy to attach and detach.The push force required for cutting can be obtained by the reaction force caused by the deflection of the opening/closing support arm by adjusting the link type boost mechanism and the conical abutment in and out at the vertical stop position of the operation bundle. and the chamfer amount is related to the rail hole chamfer, which can be easily read with the measuring loft in contact with the tip of the chamfer milling cutter.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 indicates a support arm that has two pin holes on the upper left side and a bearing section at the lower tip, 2 indicates a bushing inserted into the bearing section of support arm 1 and is fixed thereto, and 3 indicates that one end is rotatable within the bushing 2. a swing shaft inserted into the
is a spanner hook machined on the end of the swing shaft 3, 5 is a ratchet bundle inserted into the hexagonal shape of the swing shaft 3, 6 is a nine washer, 7 is a locking link, 8 is a thrust washer, 9 is a swing Axis 3
10 is an insertion hole machined on the outer peripheral surface of the chamfer milling cutter 9; 11 is an operating bundle having pin holes at the tip and the middle; 12.1
3 is a connecting plate 14, 15, 16 whose one end is rotatably attached to the support arm 1 with a pin 14, and whose other end is rotatably attached with a pin 15 in the middle of the operating nozzle 11. , 17 are pins, and 18 are two pin holes in the upper part, and the support arm 1 and the operating bundle 11 are rotatably connected by pins 16 and 17, respectively, and are screwed together with the lower tip and the conical stopper 19. Opening/closing support arm, 19 is a conical rest, 20 is a conical rest 1
9 is inserted so as to be able to slide from side to side, and has a scale engraved on the outer peripheral surface of the left end; 21 is a spring for pushing out the measurement loft; 22 is a locking link; 23 is a conical stopper 19;
A lock nut is screwed onto the rail, and 24 is a rail.

Next, the operation of the present invention will be explained.

As shown in FIG. 5, tilt the operating bundle 11 in the direction of the arrow to open the opening/closing support arm 18, insert a chamfer into the rail 24, and place the conical blade of the chamfer milling cutter 9 so that it contacts the outer circumferential surface of the bolt hole. Operation bundle 1 as shown in Figure 4
1 in the direction of the arrow, and the operation bundle 11 and the support arm 1 are stopped in contact with each other at point D.

In this state, if the 0 point is inward from the straight line connecting points A and B, the conical stop 19 installed at the tip of the opening/closing support arm 18
Even if is pressed, the opening/closing support arm 18 cannot be opened.

Next, in order to apply the pushing force necessary for cutting to the conical edge portion of the chamfering milling cutter 9, the conical abutment 19 is rotated, adjusted to be pushed out appropriately toward the rail 24 by screwing, and fixed with the lock nut 23.

Thereafter, when the operating bundle 11 is moved in the direction of the arrow to the state shown in FIG.
It is set by opening outward on the support point side.

Note that when the operation bundle 11 is brought to the stop position, a strong force is applied to the zero point by the booster mechanism, and at the same time, the opening/closing support arm 18 causes deflection between the supporting points, and the reaction force generated by this causes the push force necessary for cutting. This force causes the chamfering milling cutter 9 to be pushed in, and chamfering can be performed by repeatedly operating the ratchet bundle 5.

Next, to read the amount of chamfering, the right tip of the measuring rod 20 built into the conical abutment 19 and the tip of the chamfering milling cutter 9 come into contact with each other by the spring 21, and the amount of movement of the chamfering milling cutter 9 is measured by the measuring rod 20. is pushed out, and the measurement is performed by reading the scale engraved on the left tip of the measuring rod 20 and the amount of movement based on the right end surface of the conical stopper 19 as a standard.

Further, when polishing or replacing the chamfer milling cutter 9, the chamfering cutter 9 can be easily attached to and removed from the threaded portion of the swing shaft 3 by using the insertion hole 10 provided on the outer peripheral surface of the chamfer milling cutter 9 and the wrench hook 4.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the present invention, and Fig. 2 is a front view showing an embodiment of the present invention.
3 is a side view seen in the Y direction of FIG. 1, FIG. 4 is a detailed view of section a in FIG. 1, and FIG. 5 is an operation diagram thereof. 1... Support arm, 5... Ratchet bundle, 9... Chamfer milling cutter, 11...
・Operation bundle, 18...Opening/closing support arm, 19・
...Conical stopper, 20...Measuring rod, 2
1... Spring, 24... Rail.

Claims (1)

[Scope of utility model registration request] One side of the bolt hole is pre-drilled in the rail belly, and one side is bent at right angles, and the operating bundle is above the symmetrical side, and the opening/closing support arm is connected below with a link-type booster mechanism. A rotatable chamfer milling cutter and a ratchet bundle are installed at the tip of this support arm, and a conical stop containing a measuring rod with a coil spring inside is screwed into the tip of the opening/closing support arm. is,
It is designed to be able to be adjusted in and out.Insert the rail with it in between, press the chamfer milling cutter and conical butt into the bolt hole with the operating bundle, rotate the ratchet bundle, and check the amount of movement of the measuring rod to plan. A hole chamfer for rails characterized by chamfering work.