JP3475286B2 - Band diameter cutting tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a tool for tightening and cutting a band for fixing a boot fitted on a joint portion of a drive shaft of an automobile.

[0002]

2. Description of the Related Art Generally, a rubber boot is fitted on a joint portion of a drive shaft of an automobile in order to prevent dust. The rubber boot is fastened and fixed to the drive shaft by a flexible stainless steel strip called a boot band.

FIG. 8 is a perspective view of a generally used boot band 50. A cylindrical locking portion 52 having a substantially rectangular cross section on the upper surface of one end side of a flexible stainless steel strip 51.
Is fixed by spot welding.

Originally, the work of tightening and fixing the boot using this boot band was performed in the following procedure. The other end of the strip 51 is inserted into the locking portion 52 on the one end to form an annular shape. While holding the locking portion 52 with a flat-blade screwdriver or the like, the other end of the belt-shaped body 51 is pulled by pliers or the like to reduce the diameter of the ring and tighten the boot. When the ring is appropriately reduced in diameter, carefully press the ring so that it does not loosen, and carefully insert the strip-shaped body 51 by bending it 90 degrees or more in the tangential direction with the locking portion 52 as the fulcrum. Stop. The strip-shaped body 51 is cut with gold-cutting scissors or the like leaving a length of about 5 to 6 mm from the bent portion, and the remaining portion and the locking portion 52 are struck with a hammer or the like to be completely bent. Prevent loosening by tightening.

As described above, it is necessary to prepare various kinds of tools, and it is necessary to pay attention to the loosening of the boot band at all times during the work, which requires skill, so that the physical and mental burden on the worker is great.

Therefore, as shown in FIG. 9, insertion holes 102 are provided at the rising portions of both side surfaces of a press steel plate main body 101 having a substantially U-shaped cross section so that the diameter of the boot band can be relatively easily reduced. The winding shaft 103 is inserted into the two insertion holes facing each other, and the winding groove 1 in the axial direction is inserted into the winding shaft 103.
No. 04, the other end of the strip-shaped body 51 is inserted into the winding groove and hooked, and then the handle 105 is rotated to rotate the winding shaft to wind the boot band and reduce the diameter thereof. Has always existed.

However, this band reducing tool does not have a cutting function, and it is necessary to separately prepare a cutting tool such as gold scissors when cutting the boot band. Further, if the handle 105 is not always pressed by hand during the work, the boot band tries to expand the diameter by its own elastic force, so that the winding shaft 10 is moved in the direction opposite to the tightening direction.
There was a problem that the boot band was loosened when 5 was rotated.

Therefore, it is possible to reduce the diameter of the boot band and cut it with one tool, and to prevent the boot band from loosening due to the reverse rotation of the winding shaft even if the handle is not always pressed by hand during the tightening work. As shown in FIG. 10, a cylindrical cutter cylinder 20 in which a through-hole 203 in the axial direction is formed in the other end side surface of a main body 201 forming a grip portion 202 at one end.
4, a cutter groove 205 is formed in the cutter cylinder at a slight angle β with respect to the axial direction of the cutter cylinder in the depth direction and an opening 20 wider than the cutter groove.
6 is provided, a cutter 209 having a blade portion 207 having a substantially semicircular cross section formed at one end and a cutting lever 208 attached at the other end is rotatably fitted into the through hole, and the cutting lever is rotated. Rotate the cutter with to cut the boot band between the cutter groove and the cutter provided at an angle to the cutter tube fixed to the main body, and at the main body, the diametrical winding groove 210 and other A winding shaft 212 having a handle 211 at its end is rotatable and penetrates in parallel with the cutter cylinder, a gear 213 is fixed to the winding shaft, and a spring-biased engaging claw 214 is always engaged with the gear. It is known to prevent the boot band from loosening due to the reverse rotation of the winding shaft by providing a so-called ratchet mechanism that pivotally supports the winding shaft so as to regulate the rotation direction of the winding shaft in one direction. There is.

Although this band reducing tool has solved the problems of the conventional band reducing tool, it is disadvantageous in terms of weight and cost due to its large outer size and large number of parts due to its structure. . When using the grip, hold the grip part with one hand and rotate the handle with the other hand to rotate the winding shaft to wind up the boot band to reduce its diameter and cut the boot band after the diameter reduction is completed. Had to change the hand that was operating the handle to the cutting lever, rotate the cutting lever and rotate the cutter to perform the cutting operation, and both hands were always closed during the work. It can be cut only when it is rotated in one direction, and when the environment is limited, such as when the work space is narrow, it is not easy to use and there is a problem in terms of work efficiency.

[0010]

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional band reducing cutting tool, the present invention improves the cutting mechanism of the band to make the outer dimensions compact and improve the weight and cost. The present invention provides a band reducing cutting tool which has excellent workability and can perform work easily and quickly without requiring skill.

[0011]

[Summary of the foregoing problems of the present first invention for solving, said main body to form a grip portion in the longitudinal direction at one end, a cylindrical cutter body other longitudinal end side
The cutter axis is projectingly fixed in a direction orthogonal to the longitudinal direction of the main body, a cutter groove having a V-shaped cross section is provided in the end surface of the cutter in the diameter direction of the cutter, and the outer edge of the cutter has a polygonal external appearance. A guide member that axially penetrates a circular hole that fits with is rotatably fitted in the guide member, and the guide member is provided with a diametrical guide groove of a polygonal column and an opening portion wider than the guide groove. The winding shaft is rotatably mounted so as to penetrate through the main body in parallel with the cutter axis and project from the side surface of the main body, and one end surface of the winding shaft is provided with a winding groove in the diameter direction of the winding shaft. A handle for rotating the winding shaft is provided on the other end side of the winding shaft.

According to a second aspect of the present invention, a gear is fixed to the winding shaft, and a spring-biased engaging claw is attached to the main body so that the gear can be constantly engaged with the gear. The feature is that the direction is restricted to one direction.

[0013]

EXAMPLES Examples of band reducing cutting tools according to the present invention will be described in detail below.

FIG. 1 is a right side view of a first embodiment of a band reducing cutting tool according to the present invention. FIG. 2 is a perspective view of a first embodiment of the band reducing / cutting tool according to the present invention. A grip portion 2 is formed on the rear portion of the main body 1 in which two pressed steel plates are joined, and a cylindrical cutter 3 is provided on the front right side surface of the main body 1.
Projecting and fixing the axis of 3 in the direction orthogonal to the longitudinal direction of the main body 1.
And, on the end face of the cutter 3 is provided with a V-shaped cutter groove 4 in the diameter direction of the cutter 3.

At the outer edge of the cutter 3, a polygonal cylindrical guide member 5 having a circular hole, which is fitted in the center of the cutter 3 and axially penetrates, is fitted to the cutter 3 so as to be rotatable with respect to the cutter 3. And the guide member 5 has a diametrical guide groove 6,
An opening 7 wider than the guide groove 6 is provided. Since the cutting position of the boot band is determined by the length L of the guide groove 6, L is preferably about 6 mm. Also,
Since the angle α formed by the two sides of the guide member 5 that sandwich the guide groove 6 is the angle that determines the bending angle of the boot band, it is preferably about 120 degrees.

A winding shaft 8 is provided behind the cutter 3 so as to be rotatable and parallel to the cutter 3 so as to penetrate the main body 1.
It is attached to the main body 1 so as to project from the right side surface and the left side surface of the main body 1.

A winding groove 9 is provided in the right end surface of the winding shaft 8 in the diameter direction of the winding shaft, and a handle 10 for rotating the winding shaft 8 is attached to the left end portion.

FIG. 6 is a right side partial sectional view of a second embodiment of the band reducing / cutting tool according to the present invention. A gear 11 is fixed at a substantially intermediate position in the axial direction of the winding shaft 8 and is sandwiched between two pressed steel plates constituting the main body 1. Gear 1
1, the engaging claw 12 is axially supported between the two pressed steel plates, and is biased by the torsion coil spring 13 so as to be constantly engaged with the gear 11. The so-called ratchet mechanism constitutes the rotation of the winding shaft 8. The direction is restricted to one direction.

A method of using the band reducing tool according to the present invention will be described below.

First, as described above, the other end side of the belt-shaped body 51 of the boot band 50 is inserted into the locking portion 52 on the one end side to form an annular shape. Then, the positions of the cutter groove 4, the guide groove 5 and the winding groove 9 of the tool according to the present invention are aligned so as to communicate with each other in a straight line, and the other end side of the above-mentioned strip 51 is cut into the cutter groove 4 and the guide. It is inserted into the groove 5 and the winding groove 9, and the handle 10 is rotated as shown in FIG.
Rotate the boot band to reduce the diameter.

When the boot band 50 is reduced in diameter to an arbitrary size capable of fixing the boot, the guide member 5 as shown in FIG.
The main body 1 is rotated in the counterclockwise direction with the tip of the as a fulcrum. When the main body 1 is rotated until the outer peripheral surface of the guide member 5 comes into contact with the upper surface of the locking portion 52, the belt-shaped body 51 is bent about 120 degrees with respect to the tangential direction and is temporarily fixed.

From this state, the main body 1 is further rotated counterclockwise as shown in FIG. 1 or the clockwise direction as shown in FIG. 5 while keeping the outer peripheral surface of the guide member 5 in contact with the upper surface of the locking portion 52. When the cutter 3 is rotated to, the cutter 3 is fixed to the main body 1 and therefore rotates together with the main body 1, but the guide member 5 is rotatably attached to the cutter 3, and as described above. At this time, since the outer peripheral surface is in contact with the upper surface of the locking portion 52 and is stationary, a deviation occurs between the cutter groove 4 and the guide groove 5 that are in communication with each other in a straight line. Since the cutter groove 4 is formed in a V-shaped cross section as shown in FIG. 8, a shearing force acts between the main groove 1 and the guide groove 5 regardless of whether the main body 1 is rotated clockwise or counterclockwise, so that the cutter groove 4 is inserted. The boot band 50 that has been cut will be cut.

It is needless to say that the above is one embodiment literally, and that it can be carried out in various modified forms based on common sense of those skilled in the art.

[0024]

The first aspect of the present invention is configured as described above, so that it is possible to reduce the outer size and the number of parts as compared with the conventional band reducing cutting tool, and in terms of weight and cost. It is advantageous. In addition, a series of operations such as diameter reduction, bending, and cutting can be performed easily and quickly without requiring skill, and especially when bending and cutting, the main body can be rotated with one hand for continuous operation. I can work. Further, by forming the cutter groove in a V-shaped cross section, the band can be cut regardless of whether the main body rotates in the clockwise direction or the counterclockwise direction, and the workability in an environment where the working space is limited. It can be a very good tool even when placed on. Further, according to the second aspect of the present invention, since the so-called ratchet mechanism for restricting the rotation direction of the winding shaft is provided, the work can be performed without paying attention to the loosening of the band during the work. From the viewpoint of reducing the physical and mental burden, it can be a very excellent tool and has great utility value.

[0025]

[Brief description of drawings]

FIG. 1 is a right side view of a tool according to the present invention when a boot band is cut.

FIG. 2 is a perspective view of a tool according to the present invention.

FIG. 3 is a right side view of the tool according to the present invention when the boot band is wound and reduced in diameter.

FIG. 4 is a right side view of the tool according to the present invention when the boot band is bent.

FIG. 5 is a right side view of the tool according to the present invention when the boot band is cut.

FIG. 6 is a right side partial sectional view of a second embodiment of a tool according to the present invention.

FIG. 7 is an enlarged front view of a tool according to the present invention.

FIG. 8 is a perspective view of a boot band.

FIG. 9 is a perspective view of a conventional band reducing tool.

FIG. 10 is a perspective view of a conventional band reducing cutting tool.

FIG. 11 is an enlarged front view of a conventional band reducing tool.

[Explanation of symbols]

1 Main body 2 Grip
3 cutter 4 cutter groove 5 guide member
6 Guide groove 7 Opening 8 Winding shaft
9 Winding groove 10 Handle 11 Gear
12 engagement claw 13 torsion coil spring 100 band reducing tool 50 boot band 51 band
52 Locking Part Hereinafter, the reference numerals given to the conventional example will be described. 101 Main Body 102 Insertion Hole 103 Winding Shaft 104 Winding Groove 105 Handle 201 Main Body 202 Grip 203 203 Through Circular Hole 204 Cutter Tube 205 Cutter Groove 206 Opening 207 Blade 208 Cutting Lever 209 Cutter 210 Winding Groove 211 Handle 212 Winding Taking shaft 213 Gear 214 Engaging claw

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B25B 25/00-33/00 B65B 13/00-13/34 F16B 2/08

Claims (2)

(57) [Claims] 1. A main body having a grip portion formed at one end in the longitudinal direction,
A cylindrical cutter is attached to the other end side surface of the main body in the longitudinal direction of the cutter shaft.
The wire is projectingly fixed in a direction orthogonal to the longitudinal direction of the main body, a cutter groove having a V-shaped cross section is provided in the end surface of the cutter in the diametrical direction of the cutter, and the outer edge of the cutter has an external polygonal columnar shape. A guide member that axially penetrates through a fitting circular hole is rotatably fitted and retained, and the guide member is provided with a guide groove in a diametrical direction of a polygonal column and an opening portion wider than the guide groove.
The winding shaft is rotatably mounted so as to penetrate through the main body in parallel with the cutter axis and project from the side surface of the main body, and one end surface of the winding shaft is provided with a winding groove in the diameter direction of the winding shaft. A band diameter reducing cutting tool, characterized in that a handle for rotating the winding shaft is provided on the other end side of the winding shaft. 2. A winding shaft is fixed with a gear, and an engagement claw that is spring-biased so as to always engage with the gear is attached to the main body, and the rotation direction of the winding shaft is restricted to one direction. The band reducing tool according to claim 1, wherein