JPS6219262B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for rationally brazing small parts, such as an outer guide for holding a brake wire, to a pipe constituting a bicycle frame, for example.

Conventionally, the work of brazing small parts as described above involves cutting a long object to be brazed, such as a pipe, into a predetermined length, and fixing both ends of the object to an appropriate jig. The above-mentioned small parts were placed on the parts, heated with a hand burner while being held down appropriately, and the brazing work was performed while supplying a wire-shaped brazing material thereto.

However, in the case of the conventional method mentioned above,
Uniform brazing around small parts is difficult, requires a lot of skill, and is not only expensive but also inferior to mass production. When brazing a plurality of small parts, particularly difficult problems must be raised such as the directionality of the wires to be passed through the parts and the mutual balance of the through holes.

The present invention has been devised to solve the various problems described above, and specifically includes a large number of tact conveyors running in parallel in an endless manner, and a long object to be brazed on the conveyor. a plurality of receiving parts attached to horizontally mount the small parts, a small parts holding arm attached to the receiving parts and holding the small parts in contact with the brazing part of the brazing object, and the pair of left and right receiving parts. It is configured to be able to move toward and away from the object to be brazed along a jig that extends diagonally upward and is fixed approximately in the middle of the object, and has a recess for holding small parts at a position facing the object to be brazed. Also, a small part pressurizing holding arm equipped with a biasing means to keep the holding recess close to the object to be brazed at all times, and a burner device for heating and brazing the small part and the brazing part of the object to be brazed. The present invention relates to a brazing device for small parts on long objects, characterized by comprising:

The specific content of the present invention will be explained below based on an illustrated embodiment. Reference numeral 2 indicates a tact conveyor wound between a pair of left and right pulleys 1a and 1b, and the conveyor 2 has a V-shaped A pair of receiving parts 3 are provided at both ends, each having a groove 4 and integrally having a small parts holding arm 5 with a holding hole 5a facing the V-shaped groove 4. They are arranged symmetrically in the left and right direction.

Further, a small part pressurizing holding arm 50 is fixed approximately in the middle of the pair of receiving parts 3, 3, and the small part pressurizing holding arm 50 is attached to the tact conveyor 2 as shown in FIG. Thumbscrew 3
It is fixed by tightening 2, and
By loosening the thumbscrew 32, the tact conveyor 2
a base 31 configured to be slidable along the longitudinal direction; a jig 27 fixed on the base and extending diagonally upward; It consists of a support arm 26 that is slidable along the fixed shaft 30, and a holding recess 26a for holding the small part P1 is formed above the support arm 26, and a holding recess 26a is formed at the rear of the base 26b. A coiled spring 29 is interposed to constantly bias the sliding groove 28 diagonally downward.

The tact conveyor 2 is rotated counterclockwise in FIG. 1 by a drive mechanism (not shown), and in the case of this embodiment, after moving by the distance of the adjacent receiving portion 3, it pauses for a certain period of time, and then moves the same distance again. It is configured to repeat an intermittent cycle in which the system pauses for a while.

Furthermore, columns (not shown) are fixed above a large number of tact conveyors 2 separately from the rotation of the tact conveyors 2, and tact conveyors 2 are provided with their tips facing the small parts mounting positions of the pipes placed on the tact conveyors 2. A burner device 8 and a feeder 23 are provided above the stop position of the conveyor 2.

That is, the burner device 8 is made up of a plurality of nozzles 8a and pipes 8b, and each nozzle 8a is formed by arbitrarily bending the copper pipe 8b.
It is arranged so as to be able to discharge flame evenly around the periphery of the pipe, and its base is connected to a supply pipe (not shown).

Further, the supply pipe is held by a swing holding mechanism shown in FIG. That is, the entire mechanism is supported by a column (not shown) so as to be positioned above the above-mentioned rotating tact conveyor, and the supply pipe is held in the holding part 9 by tightening the supply pipe to the arm 10 using the tightening screw 11. The arm 10
is held movably through two bars 13a, 13b fixed to the support 12 so as to be parallel to the pipe P installed between the receiving parts 3, 3, and the upper end thereof is fixed to a bolt 14. It is fixed to the swinging rod 17 via a stopper 15 and a set screw 16.

One end of the swinging rod 17 is the universal joint 1
8, and the rod end 19 is rotatably connected to the upper end surface of the crankshaft 20 at a position offset from its center via a pin 19a, and the drive motor 2
As a result of the eccentric movement of the pin 19a when the burner 1 is driven, the burner device 8 held by the arm 10 can be repeatedly moved back and forth in the horizontal direction.

Furthermore, like the burner device 8, the wire feeder 23 is also supported by a support (not shown) to be positioned above the rotating tact conveyor, and the wire feeder 23 is positioned above the rotating tact conveyor, and is placed close to the brazing location heated by the burner device 8, and is heated by the burner device 8. 23a, and then retreats again after brazing is completed.

Reference numeral 24 denotes a pushing means, which is attached so as to be able to advance and retreat in the longitudinal direction of the pipe P by utilizing the expansion and contraction action of the cylinder 25, and is thereby used to push out the pipe P that has completed the brazing work a certain distance in the longitudinal direction. I can do it.

In the above configuration, after the pipes P to be brazed are horizontally suspended one by one using the V-shaped grooves 4, 4 of the receiving parts 3, 3, the holding recess 5a of the small part holding arm 5 and the small part machining After manually inserting each small part P1 into the holding recess 26a of the pressure holding arm 50 and sandwiching it between the small parts P1 and the outer peripheral surface of the pipe P, the tact conveyor 2 is moved and the burner is sequentially moved. Send it to device 8. The pipe P located directly below the burner device 8 is heated by injecting flame from the burner device 8 to the brazing position. At this time, when the drive motor 21 is operated at the same time, as the crankshaft 20 rotates, the rod end 19 attached to the eccentric position causes the swinging rod 17 to reciprocate along the longitudinal direction of the pipe P. The holding arm of the burner 8 is then repeatedly moved back and forth over a certain distance along the length of the object to be brazed, thereby uniformly heating the periphery of the brazing area to effect brazing.

When the pipe P is heated to a certain temperature or higher by the burner device 8, the pipe P partially expands.
The pipe P itself curves toward the heating side at its central portion, but even in this case, in the small component pressurization holding arm 50, the holding arm 26 is biased in the direction of the pipe P by the spring 29, but the deformation force of the pipe is not affected. If it is large, it will move back against the elastic force of the spring 29, and will also flexibly push back as the deformation force decreases as the pipe P cools, resulting in the pipe P having completed brazing. It is possible to prevent the removal performance from being hindered or the distal end of the holding arm 26 from being damaged.

As described above, the present invention has a configuration in which the pressurizing and holding arm for small parts, which should be located approximately in the middle of the pipe fixed on the tact conveyor, is movable forward and backward with respect to the pipe. This not only simplifies the work of inserting small parts into the pipe, but also prevents the pipe from gradually bending toward the pressure holding arm when the pipe is heated with a burner to braze the small part in the center of the pipe. After contacting the holding arm, the holding arm can be moved backward against the spring force, so there is no risk of damaging the holding arm. As a result, the work of brazing small parts to pipes becomes extremely simple, does not require special skill, improves the work environment, and evenly heats the parts to be brazed, resulting in uniform brazing. It has various beneficial effects such as maintaining its properties and being suitable for mass production.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a brazing device that is an embodiment of the present invention, Fig. 2 is a partially enlarged perspective view of the heated part by the burner, and Fig. 3 is a schematic diagram of the burner holding and swinging mechanism. FIG. 4 is an enlarged sectional view of an arm for pressurizing and holding small parts, and FIG. 5 is a perspective view of a pipe with small parts brazed thereto. 2... Tact conveyor, 3... Receiving part, 4... V-shaped groove, 5... Small parts holding arm, 5a... Holding recess,
6... Abutting plate, 7... Cylinder, 8... Burner device, 10... Arm, 12... Support column, 13a, 13
b... Bar, 17... Swing rod, 19... Rod end,
19a... Pin, 20... Crankshaft, 21... Motor, 23... Wire feeder, 24... Extrusion means, 25...
Cylinder, 26... Holding arm, 27... Jig, 2
8...Sliding groove, 29...Spring, 31...Base,
50...Small parts pressure holding arm.

Claims (1)

[Claims] 1. A large number of tact conveyors that run in parallel in an endless manner, a pair of left and right receiving sections attached to horizontally place long objects to be brazed on the conveyor, and a pair of receiving sections attached to the receiving sections. A small parts support arm that holds a small part in contact with the brazing part of the object to be brazed, and a jig that extends obliquely upward and is fixed approximately in the middle of the pair of left and right receiving parts. A small part that is configured to be able to move toward and away from an object, has a holding recess for the small part at a position facing the object to be brazed, and is equipped with a biasing means to constantly bring the holding recess close to the object to be brazed. A brazing device for small parts for long objects, characterized by comprising a pressure holding arm and a burner device for heating and brazing the small parts and the brazing portion of the object to be brazed.