JPS6320417Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bending machine for rectangular wire rods in the shape of crushed round wires used as frame lines for spring structures such as automobile seats, furniture seats, and beds.

Conventional bending machines of this type, for example, as shown in FIG.
Since a cap d, which holds the wire a in a groove formed by two bending rollers b and c, is placed above, the work efficiency during loading and unloading of the wire a was poor. In addition, since the lifting of the main body e and the rotational bending of the rotating shaft f were performed using two power sources g and h, the operations were not only complicated, but also the equipment became large. There were drawbacks such as:

The purpose of the present invention is to provide a rectangular wire bending machine that has good workability when loading and unloading wire rods, is compact as a simple unit equipment, and is lightweight by reducing the driving source. There is a particular thing.

For this reason, the bending machine of the present invention has a dual mechanism consisting of a hollow main shaft equipped with a bending roller and a shaft equipped with a wire presser, so that the two operations of pressing and bending the rectangular wire can be performed with one drive source. The feature is that the bending is performed after the bending is done.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 to 5.

Fig. 2 shows an embodiment of the present invention, in which 1 is a groove in which the rectangular wire a is set;
It consists of rollers 2 and 3. Reference numeral 4 denotes a wire presser that acts as a lid to prevent the wire a set in the groove 1 from buckling during bending.
That is, the rollers 2 and 3 are bending rollers that bend the wire material a, and can rotate freely so that the wire material a does not lock due to friction. 5 is a plate member to which rollers are attached. Reference numeral 6 denotes a hollow main shaft, which is received by a bush 7 and is adapted to move up and down and rotate, and fixes the plate member 5. A wire presser 4 is placed in the center of the hollow main shaft 6.
A shaft 8 that drives the . A cylindrical member 9 having a grooved cam on its outer periphery and a cam groove on its upper surface is connected to the shaft 8 by a key. A cam follower 10 fixed to the main body 12 serves to move the cylindrical member 9 up and down. Further, a pin 11 passing through the cylindrical member 9 transmits bending force. The cylindrical member 9 moves up and down using this pin 11 as a guide. Reference numeral 13 denotes a drive source that generates rotational force, to which the pin 11 is connected. 14
is a ball, which, as will be described later, serves to stop the rotation of the cylindrical member 9 until the ascent is completed.

FIG. 4 is a bottom view of the hollow main shaft 6 viewed from the direction of arrow A in FIG. 2, and a cam groove consisting of a high portion 6a and a low portion 6b is formed on the lower end surface of the hollow main shaft 6.

FIG. 5 is a plan view of the cylindrical member 9 seen from the direction of arrow B in FIG.
A cam groove consisting of a high portion 9a and a low portion 9b is formed.

In the rectangular wire bending machine configured as shown in FIGS. 2 to 5, arrow 1 in FIG.
As shown at 5, when the wire material a is bent, when the pin 11 connected to the drive source 13 first rotates by 45 degrees, the cylindrical member 9 also rotates by the same angle. However, since the outer periphery of the cylindrical member 9 has a grooved cam for raising the member 9,
The entire member 9 rises between 0 degrees and 45 degrees.
In other words, the member 9 simultaneously rotates and rises between 0 degrees and 45 degrees. Then, the cylindrical member 9
The shaft 8 connected to the shaft 8 also performs the same movement. The hollow main shaft 6 also rises at the same time as the cylindrical member 9, but the hollow main shaft 6 and the cylindrical member 9 are
The cam grooves are connected (see Figures 4 and 5) so that rotational force is not transmitted up to 90 degrees, and the balls 14 are prevented from rotating the hollow main shaft 6 due to friction. In other words, the hollow main shaft 6 is
Between 45 degrees, it only ascends and does not rotate. Through the series of operations so far, the groove 1 is set in the wire material a waiting above. In this state, the wire presser 4 rotates 45 degrees. During the next rotation from 45 degrees to 90 degrees, the grooved cam on the outer periphery of the cylindrical member 9 is horizontal, so the cylindrical member 9 does not rise but only rotates. Therefore, the wire presser 4 provided on the shaft 8 connected to the cylindrical member 9 completely covers and clamps the wire a. In this state, the hollow main shaft 6 and the cam groove of the cylindrical member 9 are not connected. From the next rotation of 90 degrees, the cam grooves of the hollow main shaft 6 and the cylindrical member 9 are connected, so the bending rollers 2 and 3 provided at the upper end of the hollow main shaft 6 rotate simultaneously with the hollow main shaft 6, and the wire rod Bend a in the direction of arrow 15 in FIG. At this time, the ball 14 loses its rotation and comes out of the groove.

In this way, the present invention has a dual mechanism consisting of a hollow main shaft provided with a bending roller and a shaft provided with a wire presser, and a cylindrical member that interlocks rotation and vertical movement is coupled to the shaft. 90 shaped members
When the wire rod is rotated once, it is connected to the cam groove of the hollow main shaft, and the wire rod presser presses the wire rod before bending it, so when carrying in and out the wire rod, there is no buckling as in the conventional method. There is no interference with the preventive cap, the workability is significantly improved, and one driving source performs both the holding and bending of the wire, so the bending machine can be made lighter and smaller.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional front view showing an example of a conventional bending machine, Fig. 2 is a cross-sectional front view showing an embodiment of the present invention, and Fig. 3 is a plan view showing a part of Fig. 2. ,
4 is an explanatory diagram of the cam groove of the hollow main shaft as seen from the direction of arrow A in FIG. 2, and FIG. 5 is an explanatory diagram of the cam groove of the cylindrical member as seen from the direction of arrow B in FIG. a...Flat wire rod, 1...Groove for setting the wire rod,
2, 3...Bending roller, 4...Wire rod presser, 5...
Plate member, 6... Hollow main shaft, 7... Bush, 8...
... Shaft, 9 ... Cylindrical member, 10 ... Cam follower, 11 ... Pin, 12 ... Main body, 13 ...
Drive source, 14... ball.

Claims (1)

[Scope of utility model registration request] A hollow main shaft having two bending rollers for bending a wire at one end and a cam groove at the other end, and a hollow main shaft rotatably supported at the center of the hollow main shaft and provided at one end corresponding to the bending rollers. a shaft having a wire presser; a cylindrical member keyed to the other end of the shaft and having a grooved cam on its outer periphery and a cam groove on one end; It consists of a cam follower that engages in a groove to move the cylindrical member up and down, and a pin that transmits rotational force from a drive source to the cylindrical member and slides to guide the up and down movement of the cylindrical member, and The cam groove of the cylindrical member is connected to the cam groove of the hollow main shaft when the cam groove of the cylindrical member rotates 90 degrees, so that the two bending rollers perform the bending process after the wire presser presses the wire. A special feature is the bending machine for rectangular wire rods.