KR20170106811A

KR20170106811A - Height-Adjustable Telescopic Fork

Info

Publication number: KR20170106811A
Application number: KR1020160030424A
Authority: KR
Inventors: 김희창
Original assignee: 씨엠텍21(주)
Priority date: 2016-03-14
Filing date: 2016-03-14
Publication date: 2017-09-22

Abstract

According to the present invention, a height adjustable telescopic fork comprises: a fork unit transferring an object; and a lifting unit loading the object mounted in the fork unit or controlling the height of the fork unit to selectively transfer the loaded object. The present invention easily transfers the loaded object.

Description

Height-Adjustable Telescopic Fork < RTI ID = 0.0 >

The present invention relates to a telescopic fork capable of height adjustment, and more particularly, to a telescopic fork capable of height-adjustable, and more particularly, to a telescopic fork capable of elevating the telescopic fork, To a height adjustable telescopic fork.

In general, a device for conveying a conveying object often uses a kinematic device capable of conveying the object to a long distance even if the driving body is slightly moved.

As such a driving mechanism, a structure such as a telescopic type fork is widely used. Specifically, it is configured in the same manner as a telescope of a plurality of frames so that the entire frame can be stretched or shrunk.

Conventional devices have a problem in that the number of parts and manufacturing cost are increased due to the necessity of a plurality of driving devices and the like in order to drive a plurality of stages of frames, thereby increasing the failure rate of products.

In addition, although the conventional fork can be moved such as horizontal movement of a conveyed object such as horizontal movement, there is a problem that a multi-stage stacking is impossible or a separate device such as a crane is used for stacking.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an image forming apparatus capable of raising and lowering not only a horizontal movement of a conveying object but also a conveying object, The object of the present invention is to provide a telescopic fork capable of height adjustment.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the object of the present invention, a telescopic fork having a height controllable structure is provided with a fork part for conveying a conveyed object, a fork part for conveying the conveyed object placed on the fork part, And a lifting portion for adjusting the height of the portion.

The elevating unit includes a support frame fixed on the ground or the conveying rail and having a predetermined height, an elevating unit provided on one side of the support frame and moving up and down along the height direction of the support frame, And a first driving unit provided to raise and lower the elevating unit.

The first driving unit may be a ball screw motor or a linear actuator.

Further, a guide for stably supporting the lifting and lowering of the lifting unit may be further provided on one side of the support frame.

The guide unit may include at least one first guide rail mounted on one side of the support frame and driven along the direction of elevation of the elevation unit and a second guide rail connected to the elevation unit and the first guide rail on one side of the elevation unit And may include a connection portion.

The fork portion may include a base frame coupled to the elevating portion, a front surface of the base frame, a middle frame capable of being driven in both directions, a movable frame disposed on one surface of the middle frame, And a second driving unit for driving at least one of the transport frame, the middle frame, and the transport frame.

In addition, a plurality of the middle frames may be provided.

The height adjustable telescopic fork according to the present invention has the following effects.

First, since the fork portion is adjustable in both directions, it is possible to maximize the conveying distance of the conveying object with the minimum size.

Second, the size and configuration of the apparatus can be minimized and simplified by driving the middle frame and the transfer frame through one driving unit.

Third, there is an effect that the conveyed object can be precisely conveyed even when a difference in height between right and left sides of the conveyed object or a difference in stacking and conveying height occurs.

Fourth, there is an effect that the pivoting and rocking occurring when the fork portion and the elevating portion are driven by using the guide rail and the guide roller can be minimized.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a height adjustable telescopic fork according to the present invention;
2 is a perspective view of a fork portion according to the present invention;
3 is an exploded perspective view of the fork portion according to the present invention;
4 is a bottom exploded perspective view of the fork portion according to the present invention;
5 is a perspective view of a lifting unit according to the present invention;
6 is an operational state view of the fork portion according to the present invention; And
7 is an operational state view of the lifting unit according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Configuration of height-adjustable telescopic fork

1 is a perspective view of a height adjustable telescopic fork according to the present invention. The height adjustable telescopic fork 10 according to the present invention comprises a fork portion 100 and a lift portion 200 as shown in FIG.

FIG. 2 is a perspective view of a fork portion according to the present invention, FIG. 3 is an exploded perspective view of a fork portion according to the present invention, and FIG. 4 is an exploded bottom perspective view of a fork portion according to the present invention. The fork unit 100 according to the present invention is a device for transporting a transported object in a horizontal direction. The fork portion 100 may be any device as long as it can transport the object to be transported in the horizontal direction. Preferably, however, it is preferable to use a forking device capable of slidably moving in both directions and transporting the transported object, as shown in Figs. 2 and 3. The fork portion 100 according to one embodiment will be described in more detail as follows.

The fork unit 100 includes a base frame 110, a middle frame 120, a transfer frame 130, and a second driving unit 140.

The base frame 110 connects the lifting unit 200 and the fork unit 100 and supports the components included in the fork unit 100 so that they can be seated. The base frame 110 may have a flat plate shape and may have a flat plate shape having a longitudinal direction along the conveying direction of the conveying object. In addition, a first lever gear 111 may be formed on one side of the upper surface coupled with the middle frame 120 along the longitudinal direction. A second driving unit (not shown) for transmitting the power generated by the second driving unit 140, which will be described later, to the middle frame 120 and the transfer frame 130 is provided at one side of the base frame 110, The through holes 112 are formed in the first and second drive gears 140 and 140, respectively.

The first sidewall 113 may be formed on both sides of the longitudinal direction to suppress shaking when the middle frame 120 is driven. At this time, a plurality of first guide rollers may be provided on one side of the inner side of the first side wall 113 to stably guide the driving of the middle frame 120.

The second driving unit 140 is disposed at one side of the base frame 110, preferably one side of the center of the base frame 110 to drive at least one of the middle frame 120 and the transfer frame 130. The second driving unit 140 may control the middle frame 120 and the transfer frame 130 individually. However, according to the present invention, when the second driving unit 140 drives the middle frame 120 and the transfer frame 130, (130) are controlled at the same time. The configuration of the second driver 140 according to one embodiment will be described in more detail with reference to the drawings.

The second driving unit 140 includes a body 141, a motor 142, and a driving gear 143.

The body 141 is provided at one side of the base frame 110, preferably at one side where the through-hole 112 of the base frame 110 is formed to fix the second driving part 140 to the base frame 110, 2 driving unit 140 can be combined with each other. The body 141 may have any shape as long as it provides a space in which the motor 142 and the at least one driving gear 143 can be coupled and fixed. However, it is preferable that the drive gear 143 is composed of a pair of flat plate members facing each other so that the drive gear 143 can be stably engaged.

The motor 142 may be a servo motor provided at one side of the body 141 and capable of rotating the drive gear 143 in the forward and reverse directions. However, the present invention is not limited to the servo motor, and any device may be used as long as it is a device capable of forward and reverse rotation.

The driving gear 143 is a device for transmitting the power generated by the motor 142 and is connected to the driving shaft of the motor 142 at one side of the body 141. In this case, the diameter of the driving gear 143 may be such that a predetermined length is exposed through the through hole 112 of the base frame 110. This is because the driving gear 143 and the second gear 122 provided in the middle frame 120 to be described later and the driving gear 143 are engaged with each other to move the middle frame 120 forward or backward . In the present invention, the engagement of a plurality of gears is shown as a reference, but it may be made of one gear, depending on the mode of use.

In the present invention, the structure of the second driving part 140 is described as being mainly composed of the motor 142 and the driving gear 143. However, depending on the usage, the middle frame 120, such as a linear actuator, And the transfer frame 130 can be linearly moved.

The middle frame 120 is provided on the upper surface of the base frame 110 so as to be linearly movable along the longitudinal direction of the base frame 110 to extend the movement distance of the transfer frame 130, To the transfer frame 130 to drive the transfer frame 130. The middle frame 120 may be a flat plate member having a longitudinal direction in the same direction as the base frame 110. At this time, the second sidewall 121 may be formed on one side of the middle frame 120, preferably on one side of the other side facing the base frame 110, on both sides along the longitudinal direction. As the second side wall 121 is formed, it is possible to transfer the transfer frame 130 in a stable manner.

A second frame 140 is formed on one surface of the middle frame 120 facing the base frame 110 and is engaged with the driving gear 143 of the second driving unit 140 exposed through the through hole 112 of the base frame 110 Two gears 122 are provided along the longitudinal direction of the middle frame 120. Since the second pair of gears 122 provided along the longitudinal direction of the middle frame 120 is engaged with the driving gear 143 of the second driving portion 140 to receive the power of the second driving portion 140, The middle frame 120 is linearly movable along the longitudinal direction with respect to the base frame 110 in accordance with the rotation direction of the driving unit 140.

In addition, an elongated hole is formed along one side of the middle frame 120, preferably at a position corresponding to the first lever gear 111 of the base frame 110 along the longitudinal direction. At this time, at least one driven gear 123 is provided along the perforation. As the middle frame 120 moves, the driven gear 123 rotates by engaging with the first gear 111, and transmits the rotational force to the transfer frame 130. Here, a second guide rail 124 is formed on one side of the middle frame 120 facing the transfer frame 130 along a longitudinal direction of the through portion at one side adjacent to the through portion. At this time, the guide rail may be formed at a relatively low height as compared with the second side wall 121.

The present invention is described and illustrated with respect to only one middle frame 120 having the above-described structure. However, depending on the usage, a plurality of middle frames 120 may be used to determine the moving distance of the transport frame 130 It is obvious that it can be extended. It is also apparent that the middle frame 120 may be omitted depending on other usage modes.

The transfer frame 130 is linearly movable along the longitudinal direction of the middle frame 120 to transfer the object to be transferred. The conveying frame 130 may have various shapes such as a flat plate shape or a catching shape depending on the size and shape of the conveying object. However, for convenience of explanation, a flat plate- And will be mainly described and illustrated. The shape of the transfer frame 130 will be described in more detail with reference to the drawings.

The transfer frame 130 preferably has a flat plate shape, preferably a flat plate shape having the same longitudinal direction as the base frame 110 and the middle frame 120. The third frame member 120 engages with the driven gear 123 of the middle frame 120 along the longitudinal direction of the transfer frame 130, (131) is formed. When the middle frame 120 is moved in one direction by the driving of the second driving unit 140, the middle frame 120 engaged with the first gear 111 of the base frame 110 rotates, The transfer frame 130 linearly moves in the same direction as the middle frame 120 by the third gear 131 engaged with the driven gear 123. [

A third side wall 132 is formed at a position adjacent to the third gear gear 131 and a second guide roller 133 corresponding to the second guide rail 124 is formed at one side of the third side wall 132 Respectively. Since the second guide roller 133 is provided along the second guide rail 124, the conveyance frame 130 can be stably driven by minimizing the shaking or the like when the conveyance frame 130 is conveyed.

The elevating part 200 is connected to the fork part 100 to elevate the fork part 100 to load the object to be conveyed in multiple stages or to adjust the height of the fork part 100 to convey the object to be conveyed to be. The elevating part 200 may be any device as long as it can adjust the height of the fork part 100. The elevator 200 according to one embodiment will be described in more detail with reference to the drawings.

5 is a perspective view of a lifting portion according to the present invention. 1 and 5, the elevating unit 200 includes a supporting frame 210, an elevating unit 220, and a first driving unit 230.

The support frame 210 is a device for supporting a load of the elevation unit 220 and the fork portion 100 by providing a path through which the elevation unit 220 can ascend and descend. The support frame 210 may be fixed on the ground or the conveying rail, and may have a wall shape having a predetermined height. At this time, it is preferable that the wall is made of an 'L' shape so that it can be stably fixed to a ground or a conveying rail. At this time, at least one guide unit for guiding the elevation unit 220 to be able to move up and down stably when the elevation unit 220 moves up and down along the height direction of the support frame 210, that is, the elevation direction of the elevation unit 220, may be provided.

As shown in FIG. 5, the guide portion includes a first guide rail 240 and a connecting portion 241.

The first guide rail 240 is elongated along one side of the support frame 210 along the elevating path of the elevating unit 220. The shape of the first guide rail 240 may be any shape as long as it can stably guide the lifting unit 220.

The connecting portion 241 is provided on one side of the first guide rail 240 so as to be movable along the first guide rail 240 and can be engaged with the elevating unit 220 to guide the elevating unit 220 It is a device that assists in stable elevation along the rail.

The present invention is based on the provision of two first guide rails 240. It is also possible to use one or more than one of the first guide rails 240 considering the size of the elevating unit 220, the fork unit 100, 1 guide rails 240 may be provided. At this time,

The first driving unit 230 is provided at one side of the support frame 210 to elevate the fork unit 100 coupled with the elevation unit 220 and the elevation unit 220 to increase the power for controlling the transportation height of the conveyance object . The first driving unit 230 may be a linear actuator, a motor capable of rotating in the forward and reverse directions, and the like. The first driving unit 230 may be a motor for driving the fork unit 100, Is used as a reference.

The ball screw motor is a device that converts the rotational force of the motor into linear motion. That is, the elevating unit 220 is elevated by switching the rotational force of the motor provided at one side of the support frame 210 to rectilinear motion. The ball screw motor includes a motor for generating power and a screw shaft provided on one side of the support frame 210 so as to correspond to a lifting path of the lifting unit 220 to provide a lifting path of the lifting unit 220, And a nut including a plurality of balls so as to be able to move up and down along the screw shaft. The construction and driving method of such a ball screw motor are generally used, and a detailed description thereof will be omitted.

The elevating unit 220 is coupled to one side of the first driving unit 230, that is, to one side of the nut of the ball screw motor. The elevating unit 220 is lifted and lowered together with a nut that ascends and descends by the power of the motor, And moves up and down the fork portion 100 which is seated. The elevating unit 220 may be formed in a flat plate shape so that the base frame 110 of the fork unit 100 can be stably coupled to the upper surface. At this time, since the base frame 110 of the fork unit 100 is formed in the shape of a flat plate having a length, it is preferable that the elevation unit 220 also has a shape corresponding thereto.

Further, a nut of the ball screw motor and a connecting portion 241 of the guide portion are coupled to a lower side of the elevation unit 220.

Working condition of height-adjustable telescopic fork

The operation of the height-adjustable telescopic fork 10 according to the present invention will now be described in detail with reference to the drawings.

The height adjustable telescopic fork 10 according to the present invention may be configured such that the fork portion 100 and the elevating portion 200 can be controlled simultaneously. However, for convenience of explanation, the fork portion 100 and the elevating portion 200 ) Will be described separately. The telescopic fork 10 according to the present invention does not necessarily mean that the fork portion 100 and the lifting portion 200 are individually controlled.

6 is an operational state view of the fork portion according to the present invention. As shown in FIG. 6, the fork unit 100 according to the present invention normally waits while the middle frame 120 and the transfer frame 130 are overlapped on the base frame 110. Since the base frame 110, the middle frame 120, and the transfer frame 130 are stacked so as to overlap with each other, the size of the fork unit 100 can be minimized.

When the object to be transported is to be transported in this state, the length of the fork unit 100 can be adjusted by driving the transport object in one direction along the longitudinal direction of the fork unit 100 to transport the object.

The driving gear 143 connected to the driving shaft of the motor 142 rotates in the same direction as the rotational direction of the motor 142. [

Next, the power of the motor 142 is transmitted to the middle frame 120 through the second pair of gears 122 of the middle frame 120 provided with the driving gear 143 engaged with the middle frame 120, . Since the driven gear 123 of the middle frame 120 is engaged with the first gear 111 of the base frame 110, when the middle frame 120 linearly moves in one direction, (123) also rotates. At this time, when the middle frame 120 is linearly moved, the guide rollers provided on the first side wall 113 of the base frame 110 rotate together to support the middle frame 120, The shaking can be minimized.

When the driven gear 123 of the middle frame 120 rotates, the third gear 131 of the transfer frame 130, which is provided to be engaged with the driven gear 123, moves the rotational force of the driven gear 123 to the transfer frame 130 so that the transfer frame 130 also moves linearly in the same direction as the middle frame 120. At this time, when the second guide roller 133 provided on the bottom surface of the transfer frame 130 rotates together with the second guide rail 124 provided on the middle frame 120 during the linear movement of the transfer frame 130, It is possible to minimize the vibration and shaking that occur during the linear movement of the transfer frame 130.

The motor 142 of the second driving part 140 and the second gear gear 122 of the middle frame 120 are engaged with each other and the first gear 111 of the base frame 110 The driven gear 123 of the middle frame 120 and the third gear 131 of the transfer frame 130 are engaged with each other so that only one motor 142 included in the second driving part 140 The frame 120 and the transfer frame 130 can be simultaneously controlled in the same direction.

At this time, the middle frame 120 and the transfer frame 130 can be moved linearly by the same length according to the rotation of the motor 142, and can be moved by different lengths according to the diameters of the driving gear 143 and the driven gear 123 .

After the object to be transferred is placed on the transfer frame 130 of the fork part 100 transferred to the one side through the above-described process, the motor 142 of the second driving part 140 is driven in the direction opposite to the above- The conveying object can be conveyed onto the base frame 110 or conveyed in the direction opposite to the direction in which the conveying object is placed.

In other words, since the fork unit 100 can be linearly moved in both directions, the maximum conveying distance of the conveying object is set to be twice as long as the maximum length of the base frame 110, the middle frame 120, and the conveying frame 130 .

The height of the fork portion 100 must be adjusted in order to stack a plurality of objects to be conveyed or a case where the object to be conveyed is placed on a pallet or the like. The control of the height of the fork portion 100 is controllable through the lifting portion 200.

7 is an operational state view of the lifting unit according to the present invention. In the present invention, the description will be made on the basis of transferring a conveyance object placed on a pallet. It should be noted that this is merely for convenience of explanation, and it can be appropriately changed depending on the shape of the transfer plate and the object to be transferred.

The elevating portion 200 can wait at the same height as the conveyance height of the conveyance object or wait at any of the elevation heights of the elevation portion 200. [

Thereafter, the height of the fork portion 100 is adjusted to a position corresponding to a height at which the transfer plate of the fork portion 100 can be inserted into the lower portion of the pallet when the transfer object is to be transferred.

Next, the lift unit 200 is raised and lowered so that the pallet can be seated on the transfer plate.

Next, the fork portion 100 is controlled as described above to be transferred to the loading position of the conveying object.

Next, the pallet can be loaded by controlling the height of the fork portion 100 through the elevating portion 200. [

The pallet can be stacked in a plurality of stages or the pallets stacked in a multi-stage can be transported by repeating the above-described processes.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the scope of claims of utility model registration described below rather than the detailed description, and all changes or modifications derived from the meaning and scope of utility model registration claims and equivalents are included in the scope of the present invention Should be interpreted.

10: Height adjustable telescopic fork
100: fork part
110: base frame
111: 1st gear gear
112: Through hole
113: first side wall
114: first guide roller
120: middle frame
121: second side wall
122: second gear gear
123: driven gear
124: second guide rail
130: Feed frame
131: Third gear gear
132: third side wall
133: second guide roller
140:
141: Body
142: Motor
143: drive gear
200:
210: Support frame
220:
230: first driving unit
240: first guide rail
241:

Claims

A fork part for transferring the object to be transferred; And
An elevating part for adjusting the height of the fork part in order to load a conveyed object placed on the fork part or selectively carry a conveyed object to be stacked;
A height adjustable telescopic fork.

The method according to claim 1,
The elevating unit includes:
A support frame fixed on the paper or feed rail and having a predetermined height;
An elevating unit provided at one side of the supporting frame and moving up and down along the height direction of the supporting frame; And
A first driving unit provided at one side of the support frame to move the elevating unit up and down;
A height adjustable telescopic fork.

3. The method of claim 2,
Wherein the first driving unit is a ball screw motor or a linear actuator, and the height of the telescopic fork is adjustable.

3. The method of claim 2,
And a height adjustable telescopic fork having a guide portion for stably supporting the lifting and lowering of the lifting unit on one side of the support frame.

5. The method of claim 4,
The guide portion
At least one first guide rail driven on one side of the support frame along the lifting direction of the lifting unit; And
A connecting unit provided at one side of the elevating unit to connect the elevating unit and the first guide rail;
A height adjustable telescopic fork.

The method according to claim 1,
The fork portion
A base frame coupled to the lifting unit;
A middle frame capable of being driven in both directions;
A conveyance frame provided on one side of the middle frame and drivable in the same direction as the middle frame, on which the conveyance object is placed; And
A second driving unit for driving at least one of the middle frame and the transfer frame;
A height adjustable telescopic fork.

The method according to claim 6,
The middle frame includes a plurality of height adjustable telescopic forks.