JPH10151579A - Bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize a handle as a pulley without incurring of a time and an economical loss by a method wherein the angle of the tip part of a bar with a central line is set to a value within a given range, a vertical movable handle is arranged at a part of a handle part, the tip part of the bar of the grasping part and the end part of the other are integrally formed by a screw. SOLUTION: The central shaft 8 of an upper support part 7 making contact with the upper flange part 5b of a handle 5 is formed in a columnar shape, the handle 5 is inserted in the outer peripheral part thereof and formed integrally with a lower support part 6 below the handle 5 by a screw 9. The bar has the handle 5 is moved over the central shaft 8 and by effecting strike as the handle is vertically moved in parallel from the upper support part 7 to the lower support part 6, a tip part 1 having a given cut groove is inserted between the surface of an auxiliary material fixed by a nail and the under surface of the head part of the nail. Further, the tip part 1 having a given cut groove has an angle θ of 10-60 deg. with the central line of the bar. Further, since the bar and the handle 5 working as a hammer are integrally formed, a work time loss is prevented from incurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crowbar generally used not only at a construction site but also at home.

[0002]

2. Description of the Related Art Conventionally, the present invention relates to a crowbar used for pulling out nails to which wood or the like is fixed at a building site or the like, and also used at home by a DIY or the like. However, the conventional crowbar cannot be used only with the crowbar, but always requires another tool, that is, a hammer or the like. For example, when disassembling a piece of wood or the like that is fixed with nails, use a hammer or the like to insert a crowbar between the wood or the like and the head of the nail, insert the tip of the crowbar, and insert the other bar. Was moved left and right or back and forth, and further pressed with a hammer or the like, and this was repeated to pull out a nail.

In other words, in order to pull out one nail, a hammer or the like is required in addition to a crowbar. Therefore, it is indispensable to always keep both in the same place. It was not always in the place, and it was necessary to retrieve it during the work, and sometimes to find the place where it was placed, and to search for it, causing a time loss of work.

[0004] Further, there have also been operations in which the crowbar is pressed with a hammer or the like or in a narrow place where the end of the burl cannot be moved left and right or back and forth.

Therefore, a conventional method will be described with reference to FIG. FIG. 6 is a side view showing a conventional burl.
The tip of the burl is a tapered portion 42 for easy insertion of the burl tip 41 between wood and nails and nails. A wide tapered groove 43 is cut to the center of the tapered portion 42. At this time, the intersection point 45 between the center line 44 of the burl shaft and the upper surface of the tapered portion 42 of the burl tip 41 is formed at substantially 90 °, and the back surface 46 of the top of the bail including the extension of the intersection 45 is hammered. To insert the burl tip 41 between the wood and the like and the head of the nail. Then, with the tapered portion 42 below the center line 44 as a fulcrum, the other one end portion 47 of the crowbar is used.
Is pressed with a hammer or the like while moving left and right or back and forth, and the nail is pulled out while repeating this. Also,
The other one end portion 47 is slightly curved with respect to the center line 44, and the tip portion is formed so as to be gradually thinned along the curvature, and is used as a puller. I have.

[0006]

As described above, since the crowbar and the hammer that presses the crowbar are not always located at the same place, sometimes the place where the crowbar is placed is sometimes forgotten. You have to go to the place, which results in time and economic loss. The present invention has been made to solve these problems.

[0007]

That is, according to the present invention, the tip of the burl is pressed by moving the handle up and down in parallel with the center axis of the burl. By doing so, each is not left behind and no time and economic loss is caused.

In addition, in the prior art, the tip of the upper surface of the taper of the nail puller is substantially perpendicular to the central axis of the crowbar by applying a pressing force by moving the handle up and down in parallel with the central axis of the crowbar. On the other hand, in the present method, the handle is moved up and down in parallel with the central axis of the burl, so that the tip of the nail removal portion is set in a range of 10 ° to 60 ° with respect to the central axis of the burl. did.

Further, since the handle is rotatable with respect to the center axis of the burl, the provision of the fulcrum provides a new effect such as easy use as a pulley.

[0010] Further, by making the sliding surface range of the vertical movement between the handle and the central axis into a prism as described in claim 3, it is possible to use the device in a relatively narrow place, and the tip of the nail puller is formed by the handle. The nail is not deviated from the head, and it is possible to always apply a pressing force to the nail at a fixed position.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is as follows in its implementation. The crowbar and handle (which serves as a hammer) can be integrated. The other end of the burl tip is curved with respect to the central axis of the burl, and is gradually thinned toward the tip along the curve, so that it can be used as a roller. By providing fulcrums at both ends of the handle portion of the buckle, it can be used as a pulley. By providing a nail puller of 10 ° to 60 ° on one side and 90 ° on the other side with respect to the central axis of the burl, it can be used in a narrow place. By making the central axis of the burl square, it is possible to always press the nailing portion with a handle at a fixed position.

[0012]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described in detail. FIG. 1 is a perspective view of a burl according to the present invention, and FIG.
And FIG. 3 is a schematic view showing an embodiment.

In FIGS. 1 and 2, reference numeral 1 denotes a tip of a burl having a cut groove having a required width, and θ denotes an angle of the burl tip 1 with respect to a center line 2 of the burl. And 3 is a protrusion that becomes a lever when pulling out the nail,
It is almost on the extension of the bar tip 1 on θ. Also, 4
Is the lower surface of the tapered portion of the crowbar tip 1. The bar 1 is composed of a single component from the bar tip 1 to the protruding portion 3 and the receiving portion 6 below the handle 5.
The lower brim of the handle 5 is 5a, and the upper brim is 5b.

Reference numeral 7 denotes an upper receiving portion which is in contact with the upper flange portion 5b of the handle 5. The central axis 8 of the receiving portion 7 is cylindrical, and the handle 5 is inserted into the outer peripheral portion thereof. And the receiving part 6 is integrated with a screw 9.
Then, the other one end 10 of the receiving portion 7 above the handle 5
Is slightly curved toward its tip and becomes thinner at the tip. And it can be inserted into a narrow gap.

FIG. 3 is a schematic view showing a state in which the burl according to the present invention is implemented.
Is an auxiliary material fixed to the wood 12 by the nail 13 in any case, other than wood. 5c presses the lower receiving portion 6 with an arrow indicating up and down movement using the handle 5 as a hammer, and
And between the lower part of the head of the nail 13.

Next, the operation will be described. The bar according to the present invention is such that the handle is movable with respect to the center axis of the bar, and is pressed in parallel by moving the handle up and down from a receiving portion above the handle toward a receiving portion below the handle so as to make a required cut. A grooved tip is inserted between the surface of the nail-fixed auxiliary material and the lower surface of the nail head.

For this reason, as in the prior art, the tip of the burl having a required cut groove is 90 ° with respect to the burl center line.
In this case, the tip does not enter between the surface of the auxiliary material and the lower surface of the nail head.

The present invention is intended to eliminate these drawbacks, and the tip having a required cut groove has an angle θ of 10 ° to 60 ° with respect to the center line of the burl.
(Preferably 25 ° to 35 °). That is,
When the angle θ is 10 ° or less, the surface of the auxiliary member and the central axis of the burl are substantially parallel to each other, so that it is impossible to press the handle up and down to press. When θ is 60 ° or more, the striking force of 50% or less cannot be obtained as the striking force of the handle, and therefore, the handle must be used to insert the tip of the burl into the lower surface of the auxiliary member and the nail head. It is necessary to double the vertical pressure. That is, in the present invention, the impact pressure is Co
In addition to the sθ component, the contact resistance between the bottom surface of the burl tip and the auxiliary material has a negative effect on the striking pressure. However, since the burl and the handle acting as a hammer are integrated, the work time is lost. This is advantageous because it is integrated as in the present invention.

The reason why the protrusion is provided on the back surface at the intersection angle of the tip with respect to the center axis is to serve as a fulcrum of the lever. The reason why the outer diameter of the receiving portion is equal to or smaller than the outer diameter of the flange portion at both ends of the handle is provided in consideration of the safety of work.

Although not shown, a key groove is provided on a circular shaft portion on which the handle slides, and a releasable knock pin is provided on the handle, so that the groove at the tip of the crowbar (a nail removal portion) is formed. Can always be fitted to the center of the nail. When using as a pulley, the knock pin may be released.

[0021]

Embodiment 2 This embodiment describes an embodiment in which the burl described in Embodiment 1 is used for another purpose, and FIG. 4 is a side view thereof.

In FIG. 4, reference numeral 14 denotes a tower or a part of a beam of a tower, on which a bar according to the present invention is mounted and used as a pulley, and 15 is a handle. 1, a handle different from the handle 5 shown in FIG. 2, FIG. 3 is shown. Reference numeral 16 denotes a groove for hanging the first step, 17 denotes a groove for hanging the second step, 18 denotes a rope fixed to the burl part, and 19 denotes a first rope connected to the pulley 21. The rope end 20 passes through the first-stage handle portion 16, and the rope 23 is connected to the pulley 21.
Then, the tip 23 of the rope passes through the handle 17 and becomes the rope 24. The load on the rope 24 caused by moving the rope 24 in the direction of the arrow 25 can be set to W / 4 of the load on the load 26. 1 and 2,
In the case of the handle shown in FIG. 3 or the like, the load is W / 2 because of the one-stage pulley.
Becomes Needless to say, the handle 5 and the handle 15 can be easily exchanged.

Further, since the lower pulley 21 has the same diameter at the first step 16 and the second step 17 of the groove for hanging the rope, the pulley 15
Double diameter is required. 2Φ ₁ = Φ ₂ , that is, twice the circumference of the rope on the circumference of the second stage 17 in order to eliminate any slip of the rope on the circumference of the second stage 17 This is because

[0024]

Embodiment 3 FIG. 5 is a perspective view of another burl according to the present invention. In FIG. 5, 27 is the central axis of the burl,
Reference numeral 28 denotes one end having a required groove width, and reference numeral 29 denotes another end having a required groove width on the other side. At substantially the center of the burl, there are receiving portions 30 and 31 of a handle 32 at which substantially equivalent forces act on both ends. Then, 32a is provided at both ends of the handle 32.
And 32b. Reference numeral 33 denotes a prism, reference numeral 34 denotes a rear projection at the intersection of the central axis 27 and the bar tip 28, and reference numeral 35 denotes a projection at the rear of the central axis 27 and the other bar tip 29. Each is a fulcrum of leverage.

The present embodiment is particularly effective when a burl is used in a narrow place surrounded by four sides. Hereinafter, the operation will be described. The tip having a groove having one required width with respect to the center axis of the burl is at an angle of 10 ° to 60 ° (preferably 25 ° to 35 °) with respect to the center line as in the first embodiment. The inner surface and the central axis are rectangular slide surfaces which move up and down, and the other end formed by a groove having a required width is 90 ° with respect to the central axis.

As a specific method of use, one of the tips 28 is pressed downward between the auxiliary plate and the lower surface of the nail head, and the tip is inserted (see FIG. 3). Therefore,
By making the central axis square, the nail can be pressed downward while aligning the center line of the nail with the center of the groove having the required width at the tip of the burl. Then, with the nail slightly pulled out, the other tip portion 29 is inserted therein, and the nail can be pulled out by pressing the handle upward. That is, while levers are used to pull out nails in a crowbar, the nail can be pulled out only by hitting the handle, even in a narrow place, in this method. At this time, the rear projection 34 at the intersection of the center axis 27 and the bar tip 28 and the rear projection 35 at the intersection of the center axis 27 and the bar tip 29 are effective when used alone. However, they are rarely used in the above-mentioned usage.

[0027]

According to the present invention, since the central axis of the burl is cylindrical and the inner surface of the handle is cylindrical, and the burl and the hammer are integrated, time and economic loss can be eliminated. And there exists an effect that a handle can be used as a pulley. Also, by sliding the center axis of the bar into a square shape, the nail is pressed downward while matching the center line of the nail with the groove having a required width at the tip of the bar.
At a point where the nail slightly comes off at the tip of 60 ° to 60 °, the nail can be pulled out by pressing upward with a handle at the other 90 ° tip.

[Brief description of the drawings]

FIG. 1 is a perspective view of a crowbar according to the present invention.

FIG. 2 is a sectional view of FIG. 1 in a perspective view of a crowbar according to the present invention.

FIG. 3 is a schematic diagram showing the state of implementation of a crowbar according to the present invention.

FIG. 4 is a side view of another embodiment of the burl according to the present invention.

FIG. 5,

FIG. 6 is another perspective view of another burl according to the present invention.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 Notch grooved end 2 Center line 3 Lever-protruding part 4 Tapered lower surface of the tip 5 Handle 5a Handle lower collar 5b Handle upper collar 5c Arrow indicating vertical movement of handle 5 Lower receiving part 7 Upper Receiving part 8 center shaft 9 screw 10 one other end 11 wood 12 auxiliary material 13 nail 14 turret or turret beam 15 handle 16 first-step groove (handle) 17 second-step groove 18 fixed Rope 19 Rope 20 Rope 21 Pulley 22 Rope 23 Rope 24 Rope 25 Arrow (Rope moving direction) 26 Luggage 27 Center axis of bar 28 One tip 29 Other tip 30 Receiving part 31 Receiving part 32 Handle 32a Handle Collar part 32b Collar part of handle 33 Square shape 34 Back projection at intersection of central axis 27 and burl tip 28 Intersection of central axis 27 and burl tip 29 Back projection of the difference part 41 Bar tip 42 Taper 43 Groove 44 Bar center line 45 Intersection 46 Upper back including the extension of intersection 45 θ Crossing angle between the center axis of the bar and the tip Φ ₁ handle 5 Diameter of the first stage of Φ ₂ diameter of the second stage of the handle 5

Claims (3)

[Claims] 1. A bar used as a nail puller, a simple puller, or the like, wherein the angle of a bar tip (a nail puller) with respect to the center axis of the bar is in the range of 10 ° to 60 °, and the bar projects from the back of the intersection angle. Part is provided with a handle that can move up and down on a part of the handle portion of the burl, and the slide surface between the bale center axis and the handle is circular.Furthermore, both ends of the handle of the handle portion are larger in diameter than the handle. With a receiving part,
Its outer diameter is equal to or smaller than the outer diameter of the brim part with both ends of the handle, and the tip of the burl of the handle part and the other end are integrated by screws. And bur. 2. The handle of claim 1, wherein the handle is a pulley with respect to the central axis of the burl, and when the portion where the rope is hooked has two steps, the diameter is twice as large as that of the handle. Characteristic crowbar. 3. A burl which has an angle of one end of a burl tip (a nailed portion) with respect to a burl center axis in a range of 10 ° to 60 °, and another bend which is perpendicular to the burl center axis. A crowbar having a tip portion (a cutout portion), a handle that can move up and down provided on a part of a handle portion of the crowbar central axis, and a shape of the central axis and the slide portion of the handle being square. .