JPH0245539Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drum brake used in a wire reeling table such as a drum.

Conventional drum brakes brake rotation by tightening a wire or band wound around the outer periphery of a tube that rotates with the drum, and a shaft rotatably extended between frames on both sides of the drum with an appropriate lever.
Rotate it with the brake lever installed on the shaft.
There are those that brake the rotation by pressing the shaft against the outer periphery of the drum flange, and those that have a shaft protruding from the frame of the wire reeling stand onto the drum flange surface and brake the shaft end by pressing it against the drum flange surface. However, these require the addition of various members, and despite their large-scale construction, they are unreliable.

This idea was devised in view of these points, and focused on the flange at the bearing end of the side frame of the wire reeling stand, and by compressing the spring and gently pressing this flange against the drum flange surface. The object of the present invention is to provide a drum brake that brakes the rotation of a drum, has a small number of parts, can be manufactured extremely easily, and can brake reliably.

An embodiment of this invention will be described below with reference to the drawings. Reference numeral 1 designates two side frames that support the drum 2 on both sides, and each side frame 1 is made of a tubular pipe having a triangular shape with curved corners. 3 is a bearing pipe provided at the top of each side frame 1; 4 is a center part inserted into the shaft hole of the drum 2; both ends inserted into each bearing pipe 3 of each side frame 1; shaft, 5 is drum 2
This boss 5 is fitted into the hole 2b of the collar 2a of the drum 2, and this boss 5 is fitted when the diameter of the shaft hole of the drum 2 is larger than that of the shaft 4. The boss 5 also has a collar 5a on the outside, and the collar 3a provided at one end of the bearing pipe 3 and the collar 5a are overlapped. 6 is a bearing pipe 3 for fixing the shaft 4 inserted into the bearing pipe 3 of the side frame 1.
In this embodiment, only the tightening bolt 6 provided on the bearing pipe 3 of one side frame 1 is tightened to the shaft 4. Reference numeral 7 denotes a core rod with one side inserted into the end of the shaft 4 that is not tightened by the tightening bolt 6. A spring retainer 8 is fixed by a pin 9 to the outer periphery of the end of the core rod 7 inside the shaft 4. The core rod 7 is attached to the inner periphery of the end of 4.
A spring retaining ring 10 that passes through its own hole.
is fixed by a pin 11. Reference numeral 12 denotes these spring retainers 8 and spring retaining rings 10.
A spring wrapped around the outer circumference of the core rod 7 between
3 is a long groove bored on the outer circumference of the shaft 4, and this long groove 1
The end of the pin 9 of the spring presser 8 is slidably inserted into the spring holder 3 . Reference numeral 14 denotes a cap which is placed on the outer end of the core rod 7 by inserting the core rod 7 into a hole 14a thereof, and the annular end of this cap 14 is brought into contact with the end of the bearing pipe 3. Reference numeral 15 indicates a tightening nut screwed onto the outside of the cap 14 of the threaded portion 7a provided on the outer periphery of the outer end of the core rod 7, and reference numeral 16 indicates a plurality of tightening nuts extending between the frames 1 on both sides and fixing both ends thereof. It is an auxiliary rod.

In this embodiment, when the rotation of the drum 2 is not braked, unless the tightening nut 15 is tightened, the collar 3a of the bearing pipe 3 will not press against the collar 5a of the boss 5, and therefore the frictional resistance at that point will be reduced. It is small and there is no resistance to the rotation of the drum 2. Also this drum 2
In order to brake the rotation, it is sufficient to tighten the tightening nut 15. That is, in FIG. 3, the tightening nut 1
When the spring 5 is tightened, the core rod 7 tends to move outward, that is, to the left in FIG.
2, the shaft 4 is also pulled to the left. A bearing pipe 3 is fixed to the other end of the shaft 4, so that the collar 3a of the bearing pipe 3 at the other end presses the collar 5a of the boss 5 at the other end of the drum 2. On the other hand, relative to this leftward movement of the core rod 7, the cap 14 is pushed by the tightening nut 15, and the annular end of the cap 14 pushes the bearing pipe 3 inwardly, that is, to the right in FIG. , the collar 3a of the bearing pipe 3 presses the collar 5a of the opposing boss 5. The boss 5 is integrated with the drum 2, and the overlapping surfaces of the flange 3a of the bearing pipe 3 and the flange 5a of the boss 5 are provided with anti-slip, etc., so as to have a large frictional resistance. When the tightening nut 15 is tightened in this manner, the flanges 3a of the bearing pipes 3 on both sides press the flanges 5a of the bosses 5 on both sides of the drum 2, so the frictional resistance of the drum 2 increases and rotational braking is applied. be. By interposing the spring 12, the brakes are softly applied and fine adjustment is possible.

In the above embodiment, the boss 5 is fitted to the end of the shaft hole of the drum 2, but if the boss 5 is not fitted, the flange 3a of the bearing pipe 3 directly presses against the surface of the flange 2a of the drum 2.

As described above, this invention involves inserting both ends of the shaft that supports the drum into the bearing pipes at the top of the frame on both sides, fixing one bearing pipe and the shaft end, and fixing the other bearing pipe to each other. It is slidable and has an adjustment means that can be finely adjusted using a spring that pushes the shaft end outward and the bearing pipe towards the drum, making it possible to apply rotational braking to the drum with an extremely simple structure. Moreover, it can be manufactured extremely easily by adding few parts to existing wire reeling stands and wire pulling machines that do not have brakes, and the brake device is only installed at the end of the shaft, so it is not large-scale. Does not take up space. Furthermore, it has the advantage of being able to reliably apply rotational braking to the drum.

[Brief explanation of the drawing]

The figures show an embodiment of this invention; FIG. 1 is a side view of a wire reeling table used in this invention, FIG. 2 is a front view of the same, and FIG. 3 is a sectional view showing the main parts of this invention. In the figure, 1 is the side frame, 2 is the drum, 3 is the bearing pipe, 3a is the collar, 4 is the shaft, 7 is the core rod, 8 is the spring retainer, 9 is the pin, 10 is the spring retaining ring, 12 13 is a spring, 13 is a long groove, 14 is a cap, and 15 is a tightening nut.

Claims (1)

[Scope of utility model registration request] In the above-mentioned wire reeling stand, the drum is rotatably supported by inserting and supporting both ends of the shaft passed through the shaft hole of the drum into bearing pipes provided on each of two side frames and having a flange on the drum side. One end of the shaft is fixed to the bearing pipe, and the other end is provided with an adjusting means that freely passes through the bearing pipe and presses the collar of the bearing pipe against the drum collar surface.The adjusting means has one end fixed to the shaft end. The other end of the inserted core rod is made to protrude from the shaft end, the core rod is passed through a hole in the shaft, and a cap is provided in which the annular end of the core rod is brought into contact with the end of the bearing pipe, and the core rod protrudes outward from the cap. A tightening nut is screwed onto the threaded part of the shaft, a spring retainer is fixed to the outer periphery of the core rod in the shaft, and a spring retaining ring is fixed to the inner periphery of the shaft end, with the core rod loosely passed through the shaft's own hole. A drum brake characterized in that a spring is wound around the outer circumference of a core rod between the spring retainer and the spring retaining ring.