KR20210062514A - Spanner with function of distance adjustment - Google Patents

Abstract

Disclosed is a distance-adjustable wrench. More specifically, the present invention relates to a distance-adjustable wrench which comprises: a handle; a head formed to be flat on one end of the handle to have a guide groove vertical to the handle and penetrating holes formed on both side surfaces to communicate with the guide grooves; a fixing jaw formed to protrude from one side of the head; a moving jaw which includes guide rails formed on both side surfaces, which has a cross-section corresponding to a cross-section of the guide grooves, to move being inserted into the guide grooves, and which has a plurality of first ratchets formed on a lower surfaces in a longitudinal direction at regular distances; a control piece which is inserted into the penetrating holes and in which on an upper surface a second ratchet is formed to be tooth-engaged with the first ratchet; and a first spring placed on a lower side of the control piece to pressurize the control piece upward. Between the guide rails and the first ratchet, a second spring hole is formed in a longitudinal direction. Between the moving jaw and the fixing jaw, a second spring is formed, in which one side is inserted into the second spring hole and the other side is supported by an inner side surface of the fixing jaw, thereby strengthening the tooth-engagement between the first ratchet and the second ratchet.

Description

Spanner with function of distance adjustment

The present invention relates to a spanner, and more particularly, to a spanner with adjustable spacing capable of fastening bolts or nuts of various sizes by freely adjusting the spacing between a moving jaw and a fixed jaw.

A spanner is widely used as a tool used to tighten or release a bolt or nut.

In general, when using a spanner, one manufactured according to the dimensions of the bolt or nut is used. To solve this, most of the so-called monkey spanners are used to lock or loosen bolts or nuts of various dimensions in addition to the specified dimensions.

Usually'monkey spanner' refers to a thing that can adjust the spacing between jaws.

In other words, the spanner is composed of a fixed jaw fixed to the head of the spanner and a moving jaw having a structure capable of horizontal movement on the head, so that the gap between the jaws can be easily adjusted.

In FIG. 1 below, it is shown in FIG. 1 as a known technology applied and registered by the present applicant. 1 is an exploded perspective view showing the structure of a conventional length-adjustable spanner.

Specifically, "handle 10; a flat shape that is joined to one end of the handle 10, the guide groove 21 formed in the middle of the thickness direction at the end surface 25 opposite the handle 10 and the center of the convenience The head 20 is formed in the thickness direction and has a through hole 22 communicating with the guide groove 21; The length of the head end surface 25 is pin-coupled to the head 20 so as to be rotatable in one direction A fixed jaw 30 protruding from one side in the direction; a moving jaw 40 having a guide rail 41 having a shape meshing with the guide groove 21 so that the guide rail 41 is inserted into the guide groove 21 ; The adjustment piece 50 inserted into the through hole 22 of the head 20; The spring 60 for pressing the adjustment piece 50 in the direction of the guide groove 21; And the fixing jaw 30 is pressed It comprises a pressing means that does not pressurize or not; a plurality of first protrusions 41a formed at intervals from each other in the longitudinal direction of the end surface are formed on the end surface of the guide rail 41 of the moving jaw 40 And a length-adjustable spanner, characterized in that a plurality of second protrusions 51 are formed on one end surface of the adjustment piece 50 to be spaced apart from each other in the longitudinal direction of the one end surface." have.

These conventional length-adjustable spanners can be used to fasten bolts of various sizes, but the distance between the fastening-type moving jaws such as bolts and the fixed jaws does not change, so there is no need to recalibrate the distance between the moving jaws and the fixed jaws. There is this.

However, in the case of a conventional spanner, the first protrusion and the second protrusion are manufactured by precision processing, and in this case, the protrusions are usually precisely processed at 1 mm intervals. Therefore, the processing cost is very high, which leads to an increase in the production cost, and the processing time is long.

In addition, since the spring presses the adjusting piece, the first and second protrusions remain in close contact with each other, but if the nut or bolt is tightly rotated, the meshed protrusions are pushed and released from each other due to high torque. do.

In addition, even if the adjustment piece is retracted to widen the gap between the fixed jaw and the movable jaw, even if the mating state of the first and second protrusions is released, the movable jaw must be retracted by hand to make it open to each other.

Republic of Korea Patent Registration 10-1632705 (June 6, 2016) "Length adjustable spanner" Republic of Korea Utility Model 20-0286610 (2002.8.8) "Improved Monkey Spanner"

Accordingly, the present invention is to solve the above-described problems, and an object of the present invention is to provide a second spring that provides elastic force in a direction that opens between the moving jaw and the fixed jaw, so that the tooth coupling force of the first ratchet and the second ratchet is improved. At the same time, it provides a spanner with adjustable spacing with a structure in which moving and fixed jaws can be opened automatically.

Another object of the present invention is to provide a spanner capable of adjusting the spacing having a structure capable of reducing the processing cost of the ratchet.

The spanner capable of adjusting the spacing according to the present invention for achieving the above object is a handle and a guide groove formed in a vertical direction with the handle as being formed flat on one end of the handle and communicating with the guide groove on both sides. A head in which a through hole is formed, a fixing jaw formed to protrude from one side of the head, and a guide rail having a cross section corresponding to the cross section of the guide groove are formed on both sides, so that the guide rail can be moved while being inserted into the guide groove. Adjustment in which a moving jaw in which a plurality of first ratchets are formed at regular intervals along the length direction on the lower surface, and a second ratchet that is inserted and seated in the through hole and can be tooth-coupled with the first ratchet is formed on the upper surface In a spanner comprising a piece and a first spring provided at a lower portion of the adjusting piece to press the adjusting piece upward, a second spring hole is formed in a longitudinal direction between the guide rail and the first ratchet, and the moving jaw Between the and the fixed jaw, one side is inserted into the second spring hole and the other side is provided with a second spring supported on the inner side of the fixed jaw, thereby reinforcing tooth coupling between the first ratchet and the second ratchet.

Here, it is preferable that each interval of the first ratchet is 2 to 3 times the interval of the second ratchet.

In addition, a guide pin having one end supported on the inner surface of the fixing jaw and the other end inserted into the second spring may be further provided.

In addition, a scale capable of measuring the distance between the fixed jaw and the moving jaw may be formed on the side of the head.

According to the present invention described above, there are the following effects.

First, since the first and second ratchets are reinforced by the elastic force of the first spring and the second spring, the movable jaw does not push even when a large torque is applied, and the gap between the fixed jaw and the movable jaw is strongly fixed.

Second, when the distance between the fixed jaw and the moving jaw is narrowed, the number of first ratchets is smaller than the number of second ratchets, so the movement of the moving jaw is smooth. When the first ratchet and the second ratchet are released, the moving jaw is automatically pushed out, so there is no need for the operator to directly reverse the movement. That is, it is very easy to adjust the distance between the fixed jaw and the moving jaw compared to the conventional one.

Third, by reducing the number of first ratchets, the precision processing cost is reduced and the operating time is shortened.

Fourth, the overall structure is simple, so there is an advantage of being able to reduce the weight and slimness.

1 is an exploded perspective view showing the structure of a conventional length-adjustable spanner
2 is a perspective view showing the overall appearance of a spanner with adjustable spacing according to an embodiment of the present invention
Figure 3 is a cross-sectional view of the present invention shown in Figure 2
Figure 4 is an exploded view of the present invention shown in Figure 3
Figure 5 is a side view of the moving jaw of the present invention
Figure 6 is a side view of the adjustment piece of the present invention
7 is a combined state diagram of the first ratchet and the second ratchet of the present invention
Figure 8 is an operating state diagram of the present invention

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. Further, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted.

2 is a perspective view showing the overall appearance of a spanner with adjustable spacing according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of the present invention shown in FIG. 2, and FIG. 4 is an exploded view of the present invention shown in FIG. to be.

Referring to the illustrated bar, the present invention is largely the handle 100, the head 200, the fixed jaw 300, the moving jaw 400, the adjustment piece 500, the first spring 600 and the second spring 700 ) Can be included.

First, the handle 100 is a part held by an operator when fastening a bolt or nut using a spanner, and may be formed in a long rod or bar shape.

That is, the handle 100 generates torque, and the size of the torque may be determined according to the length.

In addition, although most of the handles 100 have a fixed length, a hinge may be formed in the center of the handle 100 to be folded to reduce the length and extend the length by extending it.

Alternatively, it may be implemented in a telescopic structure so that the length can be adjusted.

Since this structure is well known, a detailed description will be omitted.

Next, the head 200 will be described.

The head 200 has a structure that accommodates the moving jaw 400, the adjustment piece 500, the first spring 600 and the second spring 700 inside, and at one end of the handle 100 It is formed flat while having a certain thickness.

The end of the head 200 forms a horizontal end surface 210 between the fixed jaw 300 and the moving jaw 400, and the horizontal end surface 210 is in contact with the side of the head of the actual nut or bolt. It is done. Accordingly, the horizontal end surface 210 is formed as a flat surface.

In addition, a guide groove 220 is formed in the head 200 along the longitudinal direction of the horizontal end surface 210, that is, in a vertical direction with the handle 100.

The guide groove 220 is a space for guiding the movement of the moving jaw 400 to be described later in the inserted state.

The guide groove 220 is formed in the middle of the horizontal end surface 210 in the thickness direction.

At this time, the cross-section of the guide groove 220 has a cross-section corresponding to the cross-section of the moving jaw 400 so that the moving jaw 400 is fitted and inserted into the guide groove 220.

Meanwhile, a lower portion of the guide groove 220 is further provided with an adjustment piece groove 230 that communicates with the guide groove 220 and is formed toward the handle 100 so that the adjustment piece 500 can be installed. Here, a spring groove 240 in which the first spring 600 can be seated and fixed is also formed on the bottom of the adjustment piece groove 230.

Through holes 250 communicating with the adjustment piece groove 230 are formed on both side surfaces of the head 200.

Accordingly, when the adjustment piece 500 is inserted into the adjustment piece groove 230, both sides of the adjustment piece 500 are exposed through the through hole 250, respectively.

Additionally, a scale 260 is formed on one side of the head 200 to measure and check the distance between the fixed jaw 300 and the moving jaw 400.

Next, the fixed jaw 300 and the moving jaw 400 will be described with reference to FIG. 5 together. 5 shows a side view of the moving jaw of the present invention.

The fixed jaw 300 is formed to protrude from one side of the head 200.

As shown, the fixed jaw 300 has a curved outer surface and a flat inner surface, so as to be perpendicular to the horizontal end surface 210.

In addition, the moving jaw 400 has the same or similar shape as the fixed jaw 300, but has a structure that is separated from the head 200 and can move while the body is inserted into the guide groove 220. .

Specifically, guide rails 410 are formed concave on both sides of the moving jaw 400 so as to have a cross section corresponding to the guide groove 220. Therefore, the guide rail 410 of the moving jaw 400 and the guide groove 220 of the head 200 are engaged with each other, and the moving jaw 400 does not swing along the longitudinal direction of the guide groove 220. It becomes possible to move horizontally without.

In addition, a first ratchet 420 is formed on the lower surface of the moving jaw 400 along the longitudinal direction.

The first ratchet 420 is made in a sawtooth shape, and a plurality of the first ratchets 420 are formed and arranged at regular intervals.

The first ratchet 420 may have an inclination on one side and a vertical shape on the other side, and thus may have a substantially right triangle shape.

In the present invention, the second spring hole 430 is formed inside the moving jaw 400 along the longitudinal direction. That is, the second spring hole 430 is arranged and formed in the same direction between the guide rail 410 and the first ratchet 420.

A part of the second spring 700 may be inserted into the second spring hole 430.

For reference, at one end of the moving jaw 400, that is, one end of the first ratchet 420, a locking jaw 440 that can be caught by the adjustment piece 500 is formed.

Next, the adjustment piece 500 will be described with reference to FIGS. 6 and 7 together. Figure 6 is a side view of the adjustment piece of the present invention and Figure 7 is a combined state diagram of the first ratchet and the second ratchet of the present invention.

The adjustment piece 500 may be formed in a square block shape, is inserted into and seated in the adjustment piece groove 230, and both sides are exposed through the through hole 250.

At this time, friction protrusions 510 are formed on both sides of the adjustment piece 500 to be exposed through the through hole 250. Accordingly, the operator can lift and lower the adjustment piece 500 with a finger using the friction protrusion 510.

In addition, a second ratchet 520 capable of being tooth-coupled with the first ratchet 420 is formed on the upper surface of the adjustment piece 500. The second ratchet 520 is formed to have the same shape and spacing as the first ratchet 420, and are arranged to face in opposite directions to each other.

Accordingly, the first ratchet 420 and the second ratchet 520 can move over a slope in one direction, but are caught in the opposite direction and thus cannot be moved.

In addition, it is preferable that an insertion groove 530 is formed in the lower portion of the adjustment piece 500 so that the first spring 600 can be inserted.

In the present invention, the first ratchet 420 and the second ratchet 520 may be disposed at the same interval, but it is preferable that the interval between the first ratchet 420 is 2 to 3 times that of the second ratchet 520. It is better to double.

Because, in the related art, the first ratchet 420 and the second ratchet 520 are manufactured by precision processing. In particular, the first ratchet 420 has a very large number of ratchets, so the processing cost increases and the processing time is long. There was a problem with it.

So, in order to solve this problem, processing cost and time were saved by extending the spacing of the first ratchet 420 to reduce the number of ratchets to be precisely processed per unit length. In addition, since the number of ratchets is relatively small, the movement of the ratchet is very smooth.

Here, when the number of the first ratchets 420 decreases, the first ratchet 420 is applied by one per two of the second ratchets 520 or one per three of the second ratchets 520. Even in this case, it can withstand a large torque sufficiently when tightening a bolt or nut.

However, if the distance between the first ratchets 420 is too wide, in other words, if the number of the first ratchets 420 is too small, the torque cannot be sufficiently endured, so it is good to limit it to about 2 to 3 times.

Next, the first spring 600 and the second spring 700 will be described.

A first spring 600 is provided between the adjustment piece 500 and the bottom of the adjustment piece groove 230.

The first spring 600 is a compression spring whose one end is inserted and supported in the insertion groove 530 of the adjustment piece, and the other end is inserted and seated in the spring groove 240 of the adjustment piece groove 230 so as to be seated in the adjustment piece 500 ) Is elastically supported upwards. That is, by pressing the adjustment piece 500 upwardly, the first ratchet 420 and the second ratchet 520 are strongly vertically engaged.

In addition, the second spring 700 is disposed between the moving jaw 400 and the fixed jaw 300 so that the moving jaw 400 is elastically supported with respect to the fixed jaw 300.

Specifically, the second spring 700 may also be a compression spring, and one side is inserted into the second spring hole 430 to elastically support the moving jaw 400, and the other side is inside the fixed jaw 300. It is supported on the side.

In this case, the second spring 700 is horizontally arranged inside the guide groove 220.

Accordingly, the moving jaw 400 always receives a force in a direction away from the fixed jaw 300 by the elastic force of the second spring 700. In other words, the states that are about to break apart are maintained.

However, since the first ratchet 420 and the second ratchet 520 are tooth-coupled, the moving jaw 400 does not come off and maintains a constant distance from the fixed jaw 300.

Here, the first ratchet 420 and the second ratchet 520 are strongly engaged horizontally by the second spring 700.

In the present invention, since the first spring 600 and the second spring 700 elastically support the moving jaw 400 at the same time, the first ratchet 420 and the second ratchet 520 are vertically and horizontally The first ratchet 420 and the second ratchet 520 are not shifted or separated even if a bolt or nut is fastened with a strong torque since the state is strongly engaged in the direction.

In addition, when the distance between the fixed jaw 300 and the moving jaw 400 is widened, when the adjusting piece 500 is lowered, the moving jaw 400 automatically moves backward by the elastic force of the second spring 700. . That is, there is no need to move the moving jaw 400 back by hand while the operator lowers the adjustment piece 500 as in the related art.

Additionally, a guide pin 710 may be further provided so that the second spring 700 maintains the position and is stably installed.

One end of the guide pin 710 may be fixed and supported on the inner surface of the fixing jaw 300, and the other end may be inserted into the second spring 700. In this case, it is preferable that the other end of the guide pin 710 maintains a state in which a part of the guide pin 710 is inserted into the second spring hole 430.

Hereinafter, an operating state of the present invention will be described with reference to FIG. 8. 8 is an operational state diagram of the present invention, FIG. 8(a) is a case in which the gap between the moving jaw and the fixed jaw is narrowed, and FIG. 8(b) is a case in which the moving jaw moves backward by releasing the adjusting piece to increase the gap.

First, the operator inserts a bolt head or nut (not shown) between the moving jaw 400 and the fixed jaw 300 in an open state, and applies force in the direction of the fixed jaw 300. Push and push.

When the moving jaw 400 is pushed, the second spring 700 is compressed, and the first ratchet 420 rides over the second ratchet 520 and the moving jaw 400 moves forward.

When the moving jaw 400 moves by an appropriate interval, the force exerted by the operator is removed to stop the advance of the moving jaw 400. At this time, the moving jaw 400 is moved by the interval of the second ratchet 520.

In this state, when a torque is applied to the handle 100 to tighten or loosen a bolt or nut, the moving jaw 400 receives a force in a backward direction, and the first spring 600 and the second spring By 700), the first ratchet 420 and the second ratchet 520 maintain a state in which they are strongly engaged with each other in the vertical and horizontal directions, so that the moving jaw 400 is not pushed out and maintains a strong fastening force.

Next, in order to open the fixed jaw 300 and the moving jaw 400, when the operator lowers the adjustment piece 500 while pressing the friction protrusion 510 of the adjustment piece 500, the first spring 600 As the adjustment piece 500 is lowered while being compressed, the meshing state of the first ratchet 420 and the second ratchet 520 is released.

Upon release, the movable jaw 400 is automatically moved backward by the elastic force of the second spring 700 so that the movable jaw 400 is opened from the fixed jaw 300.

At this time, since the locking jaw 440 is caught on the end of the adjustment piece 500, the moving jaw 400 stops without being separated from the open state.

In the above, exemplary embodiments of the present invention have been described with reference to the drawings, but those of ordinary skill in the field to which the present invention belongs will be able to perform various applications and modifications within the scope of the present invention based on the above contents. Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

100: handle
200: head
210: horizontal end surface 220: guide groove
230: adjustment piece groove 240: spring groove
250: through hole 260: scale
300: fixed jaw
400: moving jaw
410: guide rail 420: first ratchet
430: second spring hole 440: locking jaw
500: adjustment piece 510: friction protrusion
520: second ratchet 530: insertion groove
600: first spring
700: second spring 710: guide pin

Claims (4)

A handle, a head formed flat at one end of the handle, with a guide groove formed in a vertical direction with the handle, and a through hole communicating with the guide groove on both sides thereof, and a fixing formed to protrude from one side of the head The jaws and guide rails having a cross-section corresponding to the cross-section of the guide groove are formed on both side surfaces, and can be moved while being inserted into the guide groove, and a plurality of first ratchets are formed at regular intervals along the length direction on the lower surface. A moving jaw, an adjustment piece that is inserted into and seated in the through hole and has a second ratchet that can be tooth-coupled with the first ratchet on an upper surface, and an agent provided at the lower portion of the adjustment piece to press the adjustment piece upward In the spanner including 1 spring,
A second spring hole is formed in the longitudinal direction between the guide rail and the first ratchet,
Between the moving jaw and the fixed jaw, one side is inserted into the second spring hole and the other side is provided with a second spring supported on the inner side of the fixed jaw,
A spanner with adjustable spacing, characterized in that strengthening the tooth coupling between the first ratchet and the second ratchet. The method of claim 1,
Each spacing of the first ratchet is a spanner capable of adjusting spacing, characterized in that 2 to 3 times the spacing of the second ratchet. The method of claim 1,
A spanner with adjustable spacing, characterized in that a guide pin having one end supported on the inner side of the fixed jaw and the other end inserted into the second spring is further provided. The method according to any one of claims 1 to 3,
A spanner with adjustable spacing, characterized in that a scale for measuring the distance between the fixed jaw and the moving jaw is formed on the side of the head.

Images