JPH08141942A - Hydraulic multifunctional tool - Google Patents

Abstract

PURPOSE: To provide a hydraulic multifunctional tool by which attachment replacing work can be simply, speedily and efficiently performed by one touch operation and which can be used in various works of continuous thread cutting and reinforcement cutting work as a single tool including electric wire press- fitting and compressing work. CONSTITUTION: A frame to be arranged on a cylinder head 1 of a tool main body is divided into two parts, and one is formed as an L-shape yoke 4 on/from which a fixed side attachment can be mounted/demounted. The other is formed as a latch 3 lockable on the yoke, and a spring to energize the yoke in the opening direction is interposed in a yoke base end part, and a spring to energize the latch in the closing direction is interposed in a latch base end part, respectively, and these are respectively rotatably installed on the cylinder head by pin joining 5 and 6.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention can be used for terminal processing such as crimping and compressing electric wires by using terminals and sleeves, cutting reinforcing bars (steel wires), cutting all screws, and cutting cables. Hydraulic tools.

[0002]

2. Description of the Related Art Conventionally, a crimping tool or a compression tool has been used for the end treatment of electric wires. In addition, for rebar (steel wire) cutting, rebar cutter, for cutting all screws, all screw cutters,
The current situation is to use a special tool for cutting the cable, such as a cable cutter, depending on the application.

An example of a general hydraulic crimping tool will be described with reference to FIGS. 10 and 11. FIG. 10 is a front view of a conventional rechargeable hydraulic crimping tool, and FIG. 11 is a partial front view showing a cylinder head and a frame of the tool. As shown in FIG. 10, the rechargeable hydraulic crimping tool 100 has a handle portion 101.
The rechargeable battery 102 attached to the lower portion of the hydraulic pump 1 drives the motor 103 via the speed reducer 103a.
04 is operated to move the piston 106 in the cylinder 105 so that the crimping work can be performed. Reference numeral 107 is an oil tank, 108 is an operation switch, and 109 is a release switch.

When exchanging a die which is an attachment in the crimping tool 100, a slide pin 111a in which the frame 110 and the cylinder head 105a are pin-joined is pulled out, and the other shaft 111b is shown by a phantom line in FIG. With the fulcrum as a fulcrum, the frame 110 is rotated in the arrow direction to be opened. After that, the male die 112a and the female die 112b are removed, dies suitable for the size of the terminals are attached, respectively, and the frame 110 is rotated again to move the cylinder head 105a and the frame 110 to the slide pin 1.
It was bound at 11a. In FIG. 11, reference numeral 10
Reference numeral 6a denotes a male die mounting portion having a ball plunger formed at the center of the head of the piston 106, and 110a denotes a female die mounting portion having a ball plunger formed inside the front portion of the frame 110.

[0005]

However, in the conventional rechargeable hydraulic crimping tool 100, the slide pin 111a is pulled out to rotate the frame 110 to open each time the die is replaced, and the frame 110 is rotated after the die is mounted. It is necessary to push the slide pin 111a again to a predetermined position after aligning with the coupling portion of the cylinder head 105a, and the slide pin insertion / removal operation is troublesome and the die replacement work is extremely inefficient.

In addition, as a head system for hydraulic tools,
Although not shown, there are a rotary nest wheel type that uses a slide pin and a cantilever C-type head that is partially open. The former nest-wheel type requires slide pins to be inserted and removed similarly to the above frame type, and the latter C-type head has a drawback that its structure is heavy.

On the other hand, at the work site, various work such as wire crimping work, compression work, and all other screw cutting work and rebar cutting work may be required. Not only is it expensive, but it is bulky and annoying to carry. From this point of view, there has been a demand for a tool that can perform everything from crimping and compressing terminals and sleeves to cutting all screws and reinforcing bars simply by exchanging attachments according to the target work. However, there were technical difficulties, including the fact that the piston stroke was different depending on each work.

The present invention has been made in view of the above-mentioned problems, and the frame can be opened and closed easily and quickly by one-touch operation to efficiently perform the attachment replacement work, and all the screws including the electric wire crimping and compression work can be performed. It is an object of the present invention to provide a hydraulic multi-functional tool that can be used for various cutting and rebar cutting operations by simply changing the attachment with a single tool.

[0009]

In order to solve the above problems, the present invention provides, as a first invention, a frame provided on a cylinder head of a tool body, and a fixed side attachment is detachably attached to the frame, and the fixed In a hydraulic tool in which a movable side attachment is removably attached to the tip of a piston head of a tool body so as to face the side attachment, the frame is divided into two, and one of them is an L-shaped yoke to which the fixed side attachment can be attached and detached. And a spring that biases the yoke in the opening direction at the base end of the yoke and a latch in the closing direction at the base end of the latch. A hydraulic multi-function tool that is rotatably attached to each of the cylinder heads by pin connection with springs interposed respectively. Are those that form.

As a second aspect of the present invention, a hydraulic multi-function tool having a stroke adjusting member which can be attached / detached to / from the piston head tip portion or the yoke side and which allows attachment / detachment of the attachment is constituted. .

[0011]

According to the hydraulic multi-function tool of the present invention, the first aspect of the present invention is characterized in that when the attachment is attached or replaced,
By pushing up the latch against the biasing force of the spring attached to its base end, the locked state with the yoke is released, and the yoke automatically releases in the opening direction by the biasing force of the spring attached to its base end. Rotate. This one-touch operation that pushes up the latch causes the yoke to move away from the latch, and the attachment can be attached or exchanged in an open state. After mounting the attachment, the yoke is rotated in the closing direction (latch direction) against the biasing force of the spring and brought into contact with the latch, and the latch is pushed up against the biasing force of the spring. After that, both are locked. By this one-touch operation of pushing up the yoke, the yoke is locked by the latch, and the work is closed.

According to a second aspect of the present invention, a piston stroke is shortened with respect to an object by interposing a stroke adjusting top member on the piston head tip portion or the yoke side of the tool body and attaching an attachment thereto. Enables suitable work. In addition, by attaching the attachment directly at a predetermined position without using a top member for adjusting the stroke according to the object, it is possible to perform work with the original piston stroke of the tool. Depending on the work required in this way, by attaching and detaching a stroke adjusting top member to a single hydraulic tool, it can be used for various work from crimping and compressing electric wires to cutting all screws and reinforcing bars.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial front view showing a latch and a yoke of a hydraulic multi-function tool according to the present invention, FIG. 2 is an explanatory view showing a state in which the yoke is opened, and FIG. 3 is an exploded perspective view of the latch and the yoke.

The hydraulic multi-functional tool is the same as the prior art on the tool body side, only the frame of the tip portion and the structure of the cylinder head to which it is attached are different, and the description of the tool body is omitted. As shown in the figure, the cylinder head 1 is provided with a clevis-shaped latch mounting portion 1a having two left and right arms respectively provided on the upper and lower sides and a yoke mounting portion 1b. The yoke 4 is attached.

The latch 3 has a linear rod shape, and has a through hole 3a for inserting the slide pin 5 at the base end thereof, and a mounting portion is formed on the outer periphery thereof to form a torsion coil spring. 3b is provided (see FIG. 3). One end of the spring 3b is locked to the latch 3 itself, and the other end of the spring 3b is formed on the side surface between the latch mounting portions 1a.
The latch 3 is always biased in the closing direction (downward in FIG. 1). Furthermore, on the lower part of the front part of the latch 3,
A locking hole 3c for locking the locking projection 4c of the yoke 4 described later is formed. Note that reference numeral 3d is a notch formed in order to improve the catching of the finger when the latch 3 is pushed up.

Further, the yoke 4 is formed by bending a rod-shaped member into an L-shape and forming a U-shape in the closed state in which the bar-shaped member is locked to the latch 3 like the conventional frame. The yoke 4 is also provided with an insertion hole 4a for inserting the slide pin 6 at the base end thereof, and a mounting portion is formed on the outer periphery thereof to provide a torsion coil spring 4b. One end of the spring 4b is locked to the yoke 4 itself, and the other end thereof is locked to a spring locking recess 1d formed on a side surface between the yoke mounting portions 1b, so that the yoke 4 is always opened (see FIG. (1 is downward). Further, on the upper end of the tip of the yoke 4, a locking projection 4c that is locked in the locking hole 3c of the latch 3 is formed.

As shown in FIG. 1, the engaging projection 4c of the yoke 4 has a slightly arcuate bulge at the upper end thereof, and the front side of the engaging hole 3c of the latch 3 is slightly S-shaped. They are formed so that they fit together. And latch 3
When the yoke 4 and the yoke 4 are in the locked state, the locking hole 3c and the locking projection 4c are tightly locked against the biasing direction of the spring 4b of the yoke 4 so that a workable closed state can be maintained. Is configured.

Further, a fixed-side attachment mounting portion 4d which allows the fixed-side attachment to be attached and detached is provided on the inner side portion of the yoke 4 which rises vertically. This is provided with a ball plunger in the hole for holding the shank 12a of the female die 12. One of the movable attachment mounting portions 2a is provided with a ball plunger at the center of the head of the piston 2 as in the conventional example.

Next, a stroke adjusting top member provided to shorten the piston stroke will be described. The crimping piece 10 shown here is provided with a removable shank 10a on the movable side attachment attachment portion 2a of the piston 2 head at the base end portion thereof, and enables attachment / detachment of the shank 11a of the male die 11 on the opposite side. A die mounting portion 10b with a built-in ball plunger is provided. The length of the crimping piece 10 attached to the tip of the piston 2 is set to correspond to the shortened length of the piston stroke.

Here, the attachment mounting operation is shown in FIG.
It will be described based on. FIG. 4A is an explanatory diagram showing a state in which a crimping piece is mounted, and FIG. 4B is an explanatory diagram showing a state in which a male die and a female die are mounted. First, when it is in the closed state as shown by the phantom line in FIG. 4A, the notch 3d at the tip of the latch 3 of the frame is pushed up with the finger in the direction of the arrow. The latch 3 is rotated around the slide pin 5 as a fulcrum and pushed up against the biasing force of the spring 3b (see FIG. 3). The locking projection 4c of the yoke 4 locked in the locking hole 3c of the latch 3 is disengaged from the locking hole 3c, and the yoke 4 automatically moves in the opening direction by the urging force of its spring 4b (see FIG. 3). Turn to. In this open state, the crimping piece 10 is mounted on the movable side attachment mounting portion 2a of the piston 2 from the shank 10a.

Thereafter, as shown in FIG. 4B, the male die 11 is mounted on the die mounting portion 10b of the crimping piece 10 from its shank 11a. Next, the female die 12 is attached to the fixed attachment attachment portion 4d of the yoke 4 from the shank 12a. Finally, the corner portion of the yoke 4 in the open state is pushed up with a finger in the direction of the arrow. This allows
The yoke 4 rotates about the slide pin 6 as a fulcrum against the urging force of the spring 4b, and its locking projection 4c is locked in the locking hole 3c of the latch 3 to maintain a tightly closed state. To be done. Die replacement work is also performed according to the above procedure.

In this way, the yoke can be released from the latch by one-touch operation, and the yoke can be closed by one-touch operation after attachment / detachment of the attachment, so that the die replacement work can be performed easily and quickly, and the work efficiency is improved.

Next, a state in which various attachments are attached to this hydraulic multi-function tool will be described. FIG. 5 is an explanatory view showing a state in which a compression die for compressing the T-type connector is mounted. The yoke 4 is released from the latch 3 so that the movable attachment mounting portion 2a of the piston 2 has a predetermined height T.
The shaping piece 20 is attached from the shank 20a. On the die mounting portion 20b of the T-shaped top 20, a movable die 21 having a size suitable for the connector to be compressed is selected and mounted from the shank 21a. Finally, the fixed-side die 22 is mounted on the fixed-side attachment mounting portion 4d of the yoke 4 from the shank 22a.

After that, the yoke 4 is pushed up in the direction of the latch 3 to lock the locking projection 4c in the locking hole 3c to close it. In this workable state, a T-shaped connector (not shown) having an electric wire inserted therein is positioned between the movable side die 21 and the fixed side die 22, and the tool body is operated and compressed.

FIG. 6 is an explanatory view showing a state in which a compression die for compressing the terminals is mounted. Similar to the T-shaped top, the compression top 30 having a predetermined height is mounted on the movable attachment mounting portion 2a of the piston 2, and then the movable die 31 is mounted on the die mounting portion 30b of the compression top 30. A fixing die 32 is mounted on the fixed side attachment mounting portion 4d of the yoke 4.

FIG. 7 is an explanatory view showing a state in which an all-screw cutter for cutting all the screws is attached. The full screw die 41 is positioned in advance on the mounting portion of the full screw top 40, and is fixed and set by the set screw 40a. The yoke 4 is released from the latch 3, and the full screw cutter 42 is attached to the movable attachment attachment portion 2a of the piston 2 from its shank 42a. Next, the all-screw piece 40 in which the all-screw die 41 is set is mounted from the shank 40b to the fixed-side attachment mounting portion 4d of the yoke 4.

FIG. 8 is an explanatory view showing a state in which a reinforcing bar cutter for cutting the reinforcing bar is attached. When used as a reinforcing bar cutter, only the reinforcing bar cutter 50 and the reinforcing bar die 51 are used without using a specific top member. The rebar cutter 50 is mounted on the movable attachment mounting portion 2a of the piston 2, and the rebar die 51 is mounted on the fixed attachment mounting portion 4d of the opened yoke 4.

Further, a case where this hydraulic multi-function tool is used as a cable cutter will be described. FIG. 9 is a perspective view illustrating a state in which the cable cutter is mounted. Before installing the cable cutter, remove the latch and yoke attached to the cylinder head. First, as shown in FIG. 3, the slide pins 5 and 6 are pulled out to connect the latch 3 and the yoke 4 to the latch mounting portions 1a. Remove from the yoke mounting portion 1b.
Next, as shown in FIG. 9, the shank 60 b of the die piece 60 a of the cable cutter 60 is attached to the movable attachment attachment portion of the piston 2. At that time, the latch mounting portion 1
The columns 60c, 60c on both sides of the cable cutter 60 are positioned between a and the yoke mounting portion 1b, the insertion holes are aligned, and then the slide pins 5, 6 are pushed in to complete the mounting. When the piston 2 is moved, the cable cutter 60 moves through the link member 60d and the blades 60
e and 60e approach each other to cut the cable.

As described above, this hydraulic multifunctional tool can be used for a variety of operations with a single tool, from crimping work, compression work to cutting all screws, cutting rebar, and even cables, simply by changing the attachment. Can be used.

[0030]

Since the hydraulic multi-function tool of the present invention is constructed as described above, it has the following unique effects. By pushing up the latch against the biasing force of the spring attached to its base end, the locked state with the yoke is released, and the yoke automatically releases in the opening direction by the biasing force of the spring attached to its base end. Rotate. With this one-touch operation that pushes up the latch, the yoke separates from the latch, and the die is opened for opening. After the die is attached, the yoke is rotated in the closing direction against the biasing force of the spring and brought into contact with the latch, and the latch is pushed up against the biasing force of the spring, and then both are pushed. Be locked. By this one-touch operation of pushing up the yoke, the yoke is locked by the latch, and the work is closed. In this way, with one-touch operation, attachments suitable for various works can be easily and quickly attached and detached, and work efficiency is improved.

Also, a stroke adjusting member is provided at the tip of the piston head of the tool body or on the side of the yoke, and an attachment is attached to this, so that suitable work with a shortened piston stroke can be performed. To In addition, by attaching the attachment directly at a predetermined position without using a top member for adjusting the stroke according to the target work, it is possible to perform the work with the original piston stroke of the tool. Depending on the work required in this way, by attaching and detaching a stroke adjusting top member to a single hydraulic tool, it can be used for various work from crimping and compressing electric wires to cutting all screws and reinforcing bars.

[Brief description of drawings]

FIG. 1 is a partial front view showing a latch and a yoke of a hydraulic multi-function tool according to the present invention.

FIG. 2 is an explanatory diagram showing a state in which a yoke of the tool is opened.

FIG. 3 is an exploded perspective view of a latch and a yoke of the tool.

FIG. 4A is an explanatory diagram showing a state in which a crimping piece is mounted. (B) is an explanatory view showing a state in which a male die and a female die are mounted.

FIG. 5 is an explanatory diagram showing a state in which a compression die for compressing the T-type connector is mounted.

FIG. 6 is an explanatory diagram showing a state in which a compression die for compressing the terminal is attached.

FIG. 7 is an explanatory diagram showing a state in which an all-screw cutter for cutting all the screws is attached.

FIG. 8 is an explanatory diagram showing a state in which a reinforcing bar cutter for cutting the reinforcing bar is attached.

FIG. 9 is a perspective view showing a state in which a cable cutter is mounted.

FIG. 10 is a front view showing a conventional hydraulic crimping tool.

FIG. 11 is a partial front view showing a cylinder head and a frame of the tool.

[Explanation of symbols]

 1: Cylinder head 1a: Latch mounting part 1b: Yoke mounting part 1c: Spring locking recess 1d: Spring locking recess 2: Piston 2a: Movable side attachment mounting part 3: Latch 3a: Insert hole 3b: Spring 3c: Locking hole 4: Yoke 4a: Insertion hole 4b: Spring 4c: Locking protrusion 4d: Fixed side attachment mounting part 5,6: Slide pin 10: Crimping piece 10a: Shank 10b: Die mounting part 11: Male die 11a: Shank 12: Female die 12a: Shank 20: T-shaped piece 21: Movable side die 22: Fixed side die 30: Compression piece 31: Movable die 32: Fixing die 40: Full screw die 41: Full screw die 42: Full screw cutter 50: Rebar cutter 51: Rebar die 60: Cable cutter 60a: Dice piece

Claims (2)

[Claims] 1. A cylinder head of a tool body is provided with a frame, a fixed side attachment is detachably attached to this frame, and a movable side attachment is detachably attached to a piston head tip end of the tool body facing the fixed side attachment. In the hydraulic tool to be attached to, the frame is divided into two, one is formed into an L-shaped yoke in which the fixed side attachment can be attached and detached, and the other is formed into a latch that can be locked to the yoke, A spring for biasing the yoke in the opening direction is provided at the base end, and a spring for biasing the latch in the closing direction is provided at the base end of the latch. A hydraulic multi-functional tool characterized by 2. The hydraulic multifunctional tool according to claim 1, wherein a stroke adjusting top member that is detachable from the piston head tip portion or the yoke side and is capable of attaching and detaching the attachment is interposed.