JPH0337784Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an improvement of a steel bar cutter with a steel bar bender, which is used at construction sites, etc., to cut steel bars into predetermined lengths and bend them at required angles. It is something.

(Prior art) A conventional steel bar cutter with a steel bar bender, as shown in Utility Model Publication No. 50-43813, has a fixed blade and a movable blade attached to the tip of a base, and the movable blade is pivoted to the base. The steel bar was connected via a link to a handle rod that had been cut, so that the steel bar could be cut by operating the handle rod, and the steel bar could also be bent using a bending pin protruding from the side of the handle rod. However, such conventional devices bend and cut the steel bar with a single operation of the handle rod.
If the steel bar is thick, there is a drawback that unless the handle rod is made sufficiently long, a large amount of force is required to operate the handle rod. On the other hand, as shown in Japanese Utility Model Publication No. 51-47890, a ratchet gear is rotated by the reciprocating motion of a handle rod, and a steel bar is bent by a bending pin protruding from the side thereof.
Some devices are known that utilize this rotation to rotate a movable blade to cut steel bars.
The check pawl and the feed pawl are located at two points on the outer circumference of the ratchet gear.
Because they are exposed at certain locations, they pose problems such as being easily damaged by colliding with foreign objects at the work site, and posing a danger to the work.

(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems and provides a steel bar with a bar bender that is easy to operate the handle rod and has no risk of failure and is highly safe. It was completed for the purpose of cutting.

(Means for Solving the Problem) The present invention pivots a ratchet gear having a bending pin protruding from the side surface on a base having a support piece protruding from the lower part thereof, and a base part is provided at one end of the base. A handle rod with a bifurcated portion is pivotally attached by a pin, and a check claw is provided on the pin inside the bifurcated portion of the handle rod to always engage with the ratchet gear, while a non-return pawl is provided on the pin inside the bifurcated portion of the handle rod. A long feed pawl pivotally connected by a pin is provided at a position eccentric from the internal pin, also engaging with the ratchet gear,
Furthermore, the tip of the base is provided with a link that is integrally fixed to a shaft that supports the ratchet gear, and a movable blade and a fixed blade that are connected via the link.

(Examples) Next, the present invention will be explained in detail with reference to the examples shown in the drawings.

1 is a base, 2 is a pair of bearing plates formed on the upper surface thereof, and 3 is a ratchet gear that is pivotally supported by these bearing plates 2 by a shaft 4. A support piece 5 is provided protruding from the lower part of the base 1, a bending pin 6 is provided protruding from the side surface of the ratchet gear 3, and the tip of the shaft 4 is also made to protrude in the same direction. A handle rod 7 having a bifurcated portion 9 at its base is rotatably attached to one end of the upper portion of the base 1 by means of a pin 8. Two pawls are provided inside the bifurcated portion 9 of the handle rod 7 for engaging with the ratchet teeth 10 of the ratchet gear 3. One pawl is a non-return pawl 11 provided on the pin 8, and is always engaged with the ratchet gear 3 by being pressed clockwise by a spring 12 provided around the pin 8. The other claw is a long feed claw 14 which is pivoted by a pin 13 at a position eccentric from the pin 8 inside the bifurcated portion 9 of the handle rod 7. It is pressed clockwise by the action and is always engaged with the ratchet gear 3. In addition, the non-return claw 11 has a protruding part 1 protruding from the bifurcated part 9 at its upper part.
6, and by pressing the protruding portion 16 counterclockwise with a fingertip or the upper surface of the locking portion 15a of the spring 15, the engagement between the check pawl 11 and the ratchet gear 3 can be released. There is. Further, a disk-shaped fixed blade 17 is provided at the tip of the base 1.
Similarly, a disk-shaped movable blade 18 is provided. These fixed blades 17 and movable blades 18 are made of steel bars 5.
Cut portions 19 and 20 for inserting 0 are formed. The movable blade 18 connects the link 22 which is integrally fixed to the shaft 4 of the ratchet gear 3 with the tip of the arm 21 integrally provided thereon.
When the ratchet gear 3 rotates clockwise, the movable blade 18 rotates clockwise about the shaft 24 due to the action of these links 22 and 23, and the steel bars 5 inserted into the notches 19 and 20 rotate.
0 can be cut. Note that 25 is a foot lever fixed to the lower end of the base 1.

With this structure, when it is desired to bend the steel bar, the steel bar 50 can be bent using a support piece 5 projecting from the lower part of the base 1 and a bending pin 6 projecting from the side surface of the ratchet gear 3, as shown in FIG. , insert it into the rod between the shaft 4 of the ratchet gear 3 and the base 1.
while fixing it by the foot lever 25 and the handle lever 7.
In this case, when lowering the handle rod 7 from the position shown in FIG. 2 to the position shown in FIG. At this time, the long feed pawl 14 pivotally connected to the pin 13 engages with the ratchet tooth 10 of the ratchet gear 3, thereby rotating the ratchet gear 3 clockwise by one tooth, and vice versa. When moving the feed pawl 14 up from the position shown in Figure 1 to the position shown in Figure 2, the feed pawl 14
However, since the non-return pawl 11 provided on the pin 8 inside the bifurcated portion 9 always engages with the ratchet teeth 10 regardless of the position of the handle rod 7, when the handle rod 7 is raised. Also ratchet gear 3
will never return. In this way, the handle bar 7
When the ratchet gear 3 is rotated by the above operation, the bending pin 6 protruding from the side thereof pushes the tip of the steel bar 50 upward, and the steel bar 50 is bent about the shaft 4. In this way, the ratchet gear 3 is rotated one tooth at a time, so no excessive force is required to operate the handle rod 7, and the steel bar 5
0 can be easily bent to any angle. Furthermore, if the handle bar 7 is further tilted counterclockwise from the position shown in FIG.
5a presses the protrusion 16 of the check claw 11,
The engagement between the check pawl 11 and the ratchet gear 3 can be released.

Next, if you want to cut the steel bar 50, insert the steel bar 50 after aligning the positions of the fixed blade 17 provided at the tip of the base 1 and the notches 19, 20 of the movable blade 18, and proceed in the same manner as above. By operating the handle rod 7 and rotating the ratchet gear 3, the link 2
The movable blade 18 connected to the ratchet gear 3 through the ratchet gears 2 and 23 rotates clockwise around the shaft 24, and the movable blade 18 rotates clockwise around the shaft 24, and the steel bar 5 inserted between the notches 19 and 20
0 will be cut.

(Effects of the Invention) As is clear from the explanation of the above embodiments, the present invention provides a feed mechanism which is provided at a position eccentric from the pin 8 to which the handle rod 7 is pivoted inside the bifurcated portion 9 when the handle rod 7 is operated. The pawl 14 is the ratchet gear 3
The feed pawl rotates one tooth at a time, and the check pawl 11 provided on the pin 8 prevents the ratchet gear 3 from returning, making it easy to bend and cut the steel bar. 14 and the non-return claw 11 are both formed at the bifurcated portion 9 at the base of the handle bar 7.
Because it is installed inside the nail, it prevents contact with foreign objects at construction sites, etc., and eliminates malfunctions due to nail damage, as well as the risk of accidental injury to the human body. Therefore, it has great practical value as a steel bar cutter with a bar bender that solves the problems of conventional products.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway front view showing the handle rod in a raised state, and FIG. 3 is a plan view of FIG. 1. 1: base, 3: ratchet gear, 4: shaft,
5: Support piece, 6: Bending pin, 7: Handle rod, 8: Pin, 9: Forked part, 11: Non-return claw, 1
3: Pin, 14: Feed claw, 17: Fixed blade, 18:
Movable blade, 22, 23: Link.

Claims (1)

[Scope of utility model registration request] A ratchet gear 3 having a bending pin 6 protruding from the side surface on a base 1 having a support piece 5 protruding from the lower part.
A handle rod 7 having a bifurcated portion 9 at its base is pivoted to one end of the base 1 by a pin 8, and the handle rod 7 is always mounted on the pin 8 inside the bifurcated portion 9 of the handle rod 7. A check pawl 11 that engages with the ratchet gear 3 is provided, while a long feed pawl 14 pivotally connected by a pin 13 is provided inside the bifurcated portion 9 of the handle rod 7 at a position eccentric from the pin 8. A movable blade 18 is provided to engage with the gear 3, and is connected to the tip of the base 1 via a link 22 and a link 23, which are integrally fixed to the shaft 4 that pivotally supports the ratchet gear 3. A steel bar cutter with a steel bar bender, characterized in that a blade 17 is provided.