阅读说明：本技术 大力钳 (Locking pliers ) 是由 李钟河 于 2020-05-28 设计创作，主要内容包括：本发明涉及一种大力钳,更详细地,涉及如下的大力钳,即,在单手握住多个杆的锁定状态下,可通过用拇指按压开启杆的加压部来便捷地解除锁定状态,可借助杠杆原理拉动对象物并拉紧。(The present invention relates to locking pliers, and more particularly, to locking pliers that can be easily released from a locked state by pressing a pressing portion of an opening lever with a thumb in a locked state in which a plurality of levers are held with one hand, and that can pull and tighten an object by the principle of leverage.)

1. Locking pliers, comprising: fixing the rod; a rotary jaw hinged to the fixed rod and capable of grasping an object by rotating its end toward the end of the fixed rod; a movable rod hinged to the rotary jaw and capable of rotating the rotary jaw; and an adjusting lever, one end of which is hinged to the movable lever and the other end of which is hinged to an adjusting bolt provided on the fixed lever, when the movable lever is pressed, the pressing state is fixed,

the locking pliers are characterized in that,

comprises an opening rod hinged to the adjusting rod in a rod state and capable of rotating, but not hinged to the movable rod, and divided into a front side part facing the rotary jaw and a rear side part facing the opposite direction by taking a hinged shaft as a center,

wrapping the lower end of the fixed lever with four fingers except thumb under the state that the fixed lever faces to the lower part and the movable lever faces to the upper part, placing the thumb on the upper end of the movable lever, holding for use,

the front side portion is formed with a pressing portion that can be pressed by a thumb of a hand holding the fixed lever and the movable lever, and when the movable lever is pressed to bring about a locked state, the rear side portion is brought into contact with the movable lever, and when the pressing portion is pressed in a direction from the movable lever toward the fixed lever, the rear side portion pushes the movable lever away from the fixed lever side to release the locked state.

2. Locking pliers according to claim 1,

the movable rod is provided with an unlocking rod which is hinged with the movable rod,

one side end of the unlocking lever is contacted with the adjusting lever in a locking state, when the other side end of the unlocking lever is pressed, one side end of the unlocking lever presses the adjusting lever to separate the movable lever from the adjusting lever side to release the locking state,

in the locked state, the back side of the unlocking rod contacts with one side end of the unlocking rod, and when the pressing part is pressed, one side end of the unlocking rod is separated from the adjusting rod side to unlock.

3. Locking pliers according to claim 1 or 2,

a bite pad capable of grasping an object in a predetermined area is provided at each of the distal end of the fixed lever and the distal end of the rotary jaw,

the fixed rod is provided with a lever pad, and the object can be pulled by the lever principle by hooking and rotating the fixed structure from the lower part in a state that the object is caught by the meshing pad.

Technical Field

The present invention relates to locking pliers, and more particularly, to locking pliers that can be easily released from a locked state by pressing a pressing portion of an opening lever with a thumb in a locked state in which a plurality of levers are held with one hand, and that can pull and tighten an object by the principle of leverage.

Background

A locking pliers is a tool capable of maintaining a state of fixedly grasping an object.

This locking pliers was invented in 1924 by the American European (IRWIN) corporation under the trademark Vise-Grip, which is currently still widely sold.

Fig. 1 is a view showing a released state (unlocked state) of a general locking pliers, and fig. 2 is a view showing a fastened state (locked state) of a general locking pliers.

Referring to fig. 1 and 2, a general locking pliers 10 includes: a fixing lever 11; a rotary jaw 12 hinged to the fixed rod 11 and capable of grasping an object by rotating its distal end toward the distal end of the fixed rod; a movable lever 13 hinged to the rotary jaw 12 and capable of rotating the rotary jaw 12 when pressed; and an adjusting lever 14 having one end hinged to the movable lever 13 and the other end hinged to an adjusting bolt 15 provided to the fixed lever 11, for fixing a pressed state when the movable lever 13 is pressed.

As shown in fig. 2, when the lock release lever 16 is pressed in the fastened state, the lock release lever 16 presses the adjustment lever 14 to separate the movable lever 13 from the fixed lever 11, thereby releasing the fastening.

Further, in the locking pliers 10, by using a Toggle Mechanism (Toggle Mechanism) configured by A, B, C, D four-link structure, when the fastening is released as shown in fig. 1, the angle (θ 1) between the a link and the B link reaches about 90 °, but when the locking is pressed so that the angle (θ 2) between the a link and the B link reaches 180 ° or less, the locking is tightened.

On the other hand, since the release lever 16 is hinged to the inside of the movable lever 13 in the conventional locking pliers 10, the release lever 16 cannot be released by the hand holding the locking pliers, and the release lever 16 needs to be pressed by the other hand, which makes it difficult to quickly perform the fastening and releasing work such as the work of pulling the advertisement sheet and fixing it to the board frame.

Documents of the prior art

Patent document

Patent document 1: korean granted patent No. 10-0729179, "advertising cloth fixing device for plaque frame"

Patent document 2: korea published Utility model No. 20-2014-000466 'vise'

Patent document 3: korean granted patent No. 10-0713559, "vise"

Disclosure of Invention

Technical problem

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide locking pliers that can quickly and conveniently perform fastening and unfastening with one hand by pressing an opening lever with a thumb of a hand holding a plurality of levers.

Another object of the present invention is to provide locking pliers that can pull and tighten an object using the principle of leverage.

Technical scheme

To achieve the above object, the locking pliers of the present invention comprises: fixing the rod; a rotary jaw hinged to the fixed rod and capable of grasping an object by rotating its end toward the end of the fixed rod; a movable rod hinged to the rotary jaw to rotate the rotary jaw; and an adjusting lever having one end hinged to the movable lever and the other end hinged to an adjusting bolt provided to the fixed lever, and when the movable lever is pressed, the pressing state is fixed, wherein the locking pliers comprises an opening lever which is hinged to the adjusting lever in a lever state and is rotatable, but not hinged to the movable lever, and is divided into a front side portion facing the rotary jaw and a rear side portion facing the opposite direction, with a hinge shaft as a center, and in a state where the fixed lever faces a lower portion and the movable lever faces an upper portion, a lower end of the fixed lever is wrapped with four fingers except a thumb, and the thumb is placed on an upper end of the movable lever, so as to be held, and a pressing portion which can be pressed by the thumb of a hand holding the fixed lever and the movable lever is formed on the front side portion, and when the movable lever is pressed to form a locking state, the rear side portion is in contact with the movable lever, and when the pressing portion is pressed in a direction from the movable lever toward the fixed lever, the rear side portion pushes the movable lever away from the fixed lever side to release the locked state.

According to a preferred embodiment, the movable lever is provided with an unlocking lever hinged to the movable lever, one side end of the unlocking lever is in contact with the adjustment lever in a locked state, and when the other side end of the unlocking lever is pressed, one side end of the unlocking lever presses the adjustment lever to separate the movable lever from the adjustment lever side, thereby unlocking the locked state, and when the pressing portion is pressed, the rear side portion of the unlocking lever is in contact with one side end of the unlocking lever, thereby separating one side end of the unlocking lever from the adjustment lever side, thereby unlocking the locked state.

According to a preferred embodiment, a distal end of the fixed lever and a distal end of the rotating jaw are respectively provided with an engagement pad capable of gripping an object with a predetermined area, and the fixed lever is provided with a lever pad, and the object can be pulled by a lever principle by hooking and rotating a fixed structure from below in a state where the object is gripped by the engagement pad.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention has the following excellent effects.

First, according to the locking pliers of the present invention, the fixed lever and the movable lever can be gripped and fastened with a single hand, and the release of the fastening can be quickly and conveniently performed by pressing the opening lever with the thumb of the gripped hand.

Further, according to the locking pliers of the present invention, the lever pad can be hooked to the lower end of the fixed structure, and the locking pliers can be rotated by the lever principle to pull the object to be tightened, so that the work of tightening the advertisement cloth and the like to fix the advertisement cloth to the board frame can be performed very effectively.

Drawings

Fig. 1 is a view showing a released state of a general locking pliers.

Fig. 2 is a view showing a fastening state of a general locking pliers.

Fig. 3 is a view showing a fastening state of the locking pliers according to an embodiment of the present invention.

Fig. 4 is a view showing a released state of the locking pliers according to the embodiment of the present invention.

Description of reference numerals

10: the existing locking pliers 11: fixing rod

12: the rotating jaw 13: movable rod

14: adjusting a rod 15: adjusting bolt

16: unlocking rod

100: locking pliers 110 of the invention: opening lever

111: hinge shaft 112: front side part

113: rear side portion 114: pressurization part

120. 120 a: bite pad 130: lever pad

140: u-shaped handle

Detailed Description

Terms used in the present invention are selected from general terms which are currently widely used as much as possible, but there are also terms which the applicant has selected by himself in a specific case, and in this case, the meanings of the terms should be grasped in consideration of the meanings described or used in the detailed description of the invention, not limited to the names of the terms.

Hereinafter, the technical structure of the present invention will be described in detail with reference to a plurality of preferred embodiments shown in the drawings.

However, the present invention is not limited to the embodiments described herein, and may be embodied in other embodiments. Like reference numerals refer to like elements throughout the specification.

Fig. 3 is a view showing a fastening state of locking pliers according to an embodiment of the present invention, and fig. 4 is a view showing a release state of locking pliers according to an embodiment of the present invention.

Referring to the drawings, the locking pliers 100 according to an embodiment of the present invention is a tool for grasping or putting down an object 1 using a toggle mechanism having a four-bar linkage structure, and particularly, is very advantageous for a tablet work in which a binding work is continuously performed on a tablet frame after pulling and tightening an advertisement sheet.

The locking pliers 100 comprises a fixed rod 11, a rotary jaw 12, a movable rod 13, an adjusting rod 14, an adjusting bolt 15, an unlocking rod 16 and an opening rod 110, and further comprises bite pads 120 and 120a, a lever pad 130 and a U-shaped handle 140.

The fixed lever 11, the rotatable jaw 12, the movable lever 13, the adjustment lever 14, the adjustment bolt 15, and the release lever 16 are substantially the same as the fixed lever 11, the rotatable jaw 12, the movable lever 13, the adjustment lever 14, the adjustment bolt 15, and the release lever 16 of the conventional locking pliers 10 shown in fig. 1 and 2, and thus detailed description thereof will be omitted.

The opening lever 110 is pivotally hinged to a side surface of the adjustment lever 14 in a lever state, and is divided into a front side portion 112 facing the pivoting jaw 12 and a rear side portion 113 facing the opposite direction with reference to a hinge shaft 111.

Also, the opening lever 110 may be hinged to either one of left and right sides of the adjustment lever 14 according to physical characteristics of a user and a purpose of work.

The length of the front portion 112 is greater than the length of the rear portion 113, and a pressing portion 114 having a predetermined area is formed at the end of the front portion 112 so that the operator can press the fixing lever 11 and the movable lever 13 with his or her thumb.

The end of the rear side portion 113 contacts one end of the lock release lever 16, and when the pressing portion 114 is pressed, one end of the lock release lever 16 is pushed open, so that the movable lever 13 is separated from the adjustment lever 14 side to release the lock.

The reason why the length of the front side portion 112 is made longer than the length of the rear side portion 113 is to push open the lock release lever 16 with a small force.

On the other hand, even if the release lever 16 is not separately provided, the locking pliers 100 of the present invention may release the locking state of the movable lever 13 from the fixed lever 11 by directly contacting the rear side portion 113 of the open lever 110 to the movable lever 13, and thus the release lever 16 may be selectively provided.

Therefore, unlike the conventional locking pliers 10 in which the locking is released by pressing the unlocking lever 16 with one hand while the movable lever 13 and the fixed lever 11 are held with the other hand, there is an advantage in that the locking and unlocking can be quickly and conveniently performed with one hand by pressing the pressing portion 114 with the thumb of the holding hand.

The engagement pads 120 and 120a are provided at the end of the rotary jaw 12 and the end of the fixing lever 11, which can directly grip the object 1, and serve to stably grip the object 1 in a predetermined area.

Since the bite pads 120 and 120a have a predetermined area, it is effective when the object 1 is a thin and soft article such as a film or a cloth.

The lever pad 130 is provided on the fixing lever 11 to be spaced apart from a lower end of the engagement pad 120a provided on the fixing lever 11 by a predetermined distance, and is rotated in the "r" direction by hooking a lower portion of the fixed structure 2, thereby pulling and tightening the object 1 by using the principle of leverage.

This lever pad 130 is also effective when the object 1 is pulled tight to an advertisement cloth for board setting or the like.

The U-shaped handle 140 is a ring-shaped object disposed at the lower end of the fixing rod 11, and has a size that four fingers except the thumb can be inserted therein, thereby preventing the locking pliers 100 from falling off the hand during the operation.

As described above, although the present invention has been described in the form of illustrating the preferred embodiments, the present invention is not limited to the above-described embodiments, and various changes and modifications can be made by one of ordinary skill in the art to which the present invention pertains within the scope not departing from the gist of the present invention.

Industrial applicability

The locking pliers of the present invention are industrially applicable as a tool.