KR102223089B1 - Power Transmission Device for Gantry Crane and Gantry Crane Apparatus Therewith - Google Patents

Abstract

The power transmission device for a gantry according to the present invention is a power transmission device for a gantry crane according to an embodiment of the present invention. A power transmission device for a gantry crane that crosses the first travel track and the second travel track, wherein the power transmission device for the gantry crane includes: a first pulley disposed corresponding to an upper side of the first travel track; A second pulley disposed to correspond to the upper side of the second driving track and positioned opposite the first pulley; A belt circulating to form a closed loop track between the first pulley and the second pulley; A mast assembly moving motor configured to move the mast assembly between the first pulley and the second pulley by driving the first pulley; A pulley having a pulley front cover plate and a pulley rear cover plate each supporting the rotation axis of the first pulley and the second pulley, and a pulley base plate that is commonly connected to and supported by the pulley front cover plate and the pulley rear cover plate. Cover plate assembly; And a pulley cover plate assembly deforming part for controlling the tension of the belt between the first pulley and the second pulley by causing deformation of the pulley cover plate assembly.

Description

Power Transmission Device for Gantry Crane and Gantry Crane Apparatus Therewith}

The present invention relates to a power transmission device for a gantry crane and a gantry crane having the same, and more particularly, to a belt-type power transmission device that transmits power for moving a mast assembly in a gantry crane device, and a gantry crane having the same. will be.

In general, facilities such as factory buildings or distribution warehouses are used to store not only lightweight cargo but also heavy cargo. For such storage, light and heavy objects should be transported to the required location. Since it is difficult to transport heavy objects by manpower, a motorized vehicle such as a forklift is used. In order to transport heavy objects with a forklift, the operating space of the forklift must be secured. However, when the area of the facility is small, or when the cargo to be stored needs to be densely arranged even if the area of the facility is large, it is difficult to secure the operating space of the forklift. Therefore, there is a need for a means to replace such a forklift.

For this, a gantry system was introduced. In a conventional gantry system, a belt is widely used as a method of transmitting power to move a cargo in three dimensions. In a belt-type power transmission device, the tension applied to the belt becomes an important factor in driving the belt.

However, in the conventional gantry system, in the belt drive device for moving the mast assembly, the distance between the driving pulley and the driven pulley is fixed, and welding deformation occurs in the process of welding the support plates fixing the pulleys. There was a problem in that the distance between the driven pulleys was different from that of previously designed. In the belt drive device welded in this way, there is a problem in that it is impossible or extremely limited to adjust the tension of the belt installed in the driven pulley and the driven pulley. In this way, when the tension of the belt is not accurately controlled, a flapping phenomenon in which the belt flutters occurs, or a problem occurs in that accurate driving is impossible due to slip of the belt.

In addition, while using the gantry system, there is a problem that it is not possible to actively cope with the necessity of adjusting the tension of the belt according to the service life.

In order to solve the above problems, an object of the present invention is to provide a power transmission device capable of fine-tuning the tension between pulleys in a simple manner by correcting the welding deformation of the belt drive device used in the gantry crane device.

The power transmission device for a gantry crane according to an embodiment of the present invention comprises a mast assembly on the truss assembly of a traveling bogie assembly moving on a first traveling track and a second traveling track extending in parallel, and the first traveling track and the second traveling track. A power transmission device for a gantry crane that crosses a travel track, wherein the power transmission device for a gantry crane includes: a first pulley disposed to correspond to an upper side of the first travel track; A second pulley disposed to correspond to the upper side of the second driving track and positioned opposite the first pulley; A belt circulating to form a closed loop track between the first pulley and the second pulley; A mast assembly moving motor configured to move the mast assembly between the first pulley and the second pulley by driving the first pulley; A pulley having a pulley front cover plate and a pulley rear cover plate each supporting the rotation axis of the first pulley and the second pulley, and a pulley base plate that is commonly connected to and supported by the pulley front cover plate and the pulley rear cover plate. Cover plate assembly; And a pulley cover plate assembly deforming part for controlling the tension of the belt between the first pulley and the second pulley by causing deformation of the pulley cover plate assembly.

Here, as a feature of the pulley front cover plate and the pulley rear cover plate, it further includes a transmission member extending along a contact surface of the pulley base plate and at least one of the features.

In addition, the power transmission device for a gantry crane according to an embodiment of the present invention is formed in the transmission member, the pulley base through the transmission member through hole and the transmission member through hole opened toward the surface of the pulley base plate. It further includes a deformable member having a thread formed thereon so as to be inserted in contact with the surface of the plate.

The deformable members are arranged in pairs along the longitudinal direction of the transmission member.

In addition, the power transmission device for a gantry crane according to an embodiment of the present invention is disposed on the outside of the pair of deformable members along the longitudinal direction of the transmission member, the transmission member is the pulley front cover plate and the pulley rear It further includes at least one of the cover plates and a fixing member fixed to the base plate.

Here, the arrangement height of the center of the rotation shaft of at least one of the first pulley and the second pulley is included between the distance between the deformable members arranged in pairs along the longitudinal direction of the transmission member.

In addition, the height difference between the deformable member disposed on the upper side of the pair of deformable members along the longitudinal direction of the transfer member and the center of the rotation axis of either the first pulley or the second pulley is the transfer of the pair of deformable members. It is set smaller than the height difference between the deformable member disposed at the lower side along the longitudinal direction of the member and the center of the rotation axis of either the first pulley or the second pulley.

A power transmission device for a gantry crane according to an embodiment of the present invention includes a guide pulley disposed adjacent to the first pulley and in contact with the outer surface of the belt, wherein the first pulley is driven by the mast assembly moving motor. And the guide pulley is such that the sum of the radius of the guide pulley, the radius of the first pulley, and the thickness of the belt is greater than the height difference between the center of the rotation axis of the first pulley and the center of the rotation axis of the guide pulley. It is disposed toward the second pulley.

Meanwhile, the deformable member extends parallel to at least one of the pulley front cover plate and the pulley rear cover plate.

The effect of the power transmission device for a gantry crane according to the present invention will be described as follows.

First, since the deformable member is disposed in consideration of the position of the rotation shaft of the belt pulley, the tension between the belt pulleys in the power transmission device previously assembled by welding can be easily finely adjusted after assembly.

Second, it is possible to adjust the distance between the belt pulleys in an economical and simple way without having a complicated structure for adjusting the distance between the belt pulleys.

Third, it is possible to finely adjust the spacing between the belt pulleys, thereby enabling accurate power transmission of the belt.

Fourth, it is possible to prevent the meandering of the belt that may occur when the gap between the belt pulleys is different from the design.

Fifth, it is possible to adjust the contact angle between the belt pulley on the driving side that drives the power and the belt, so that the belt power can be transmitted closer to the design value.

1 is a perspective view of a gantry crane device having a power transmission device according to an embodiment of the present invention.
FIG. 2 is a partially enlarged perspective view of block A of FIG. 2.
3 is an explanatory view of a vertical section of a prime mover pulley of the power transmission device of FIG. 2.
4 is a perspective view of a gantry crane device having a power transmission device according to an embodiment of the present invention as viewed from the opposite side of FIG. 1.
5 is a partially enlarged perspective view of block B of FIG. 4.
6 is a partially enlarged view of FIG. 5.
7 is a cross-sectional view taken along the line VII-VII of FIG. 6.
8 is an explanation of a change in stress in the cross section of FIG. 7.

A specific embodiment for carrying out the present invention will be described with reference to the accompanying drawings. The thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be understood based on the contents described throughout this specification.

The terms "first" and "second" used in the present invention will be used to distinguish corresponding components from each other, but do not indicate the importance or order of operation between the components.

1 is a perspective view of a gantry crane apparatus having a traveling bogie assembly according to an embodiment of the present invention, and FIG. 2 is a partially enlarged perspective view of block A of FIG. 1.

The gantry crane device according to an embodiment of the present invention includes a traveling bogie assembly 100 disposed in parallel with each other and a traveling track unit 180 providing a traveling path through which the traveling bogie assembly 100 slides and moves. do. That is, the traveling bogie assembly 100 according to an embodiment of the present invention includes each traveling track 182a and 182b on the first traveling track 182a and the second traveling track 182b arranged parallel to each other with the same spacing. It is driven by each of the sliding drive motors 122a and 122b corresponding to the sliding drive.

The traveling bogie assembly 100 supports a truss assembly 110 formed by rigidly connecting a horizontal support and a vertical support to each other, and a load when the truss assembly moves in the driving direction (X direction in FIG. 1 or the opposite direction thereof). It includes a structural member 115 including an inclined support beam 114.

On the other hand, independently of the traveling bogie assembly 100 moving in the X direction (or the reverse direction) shown in FIG. 1 while being connected to the first traveling track 182a and the second traveling track 182b, the truss On the assembly 110, a mast assembly 130 that can move in the longitudinal direction of the truss assembly 110 (in the Y direction in FIG. 1 or the opposite direction thereof) is provided. The mast assembly 130 is a power transmission member extending in the longitudinal direction (Y direction or reverse direction) of the truss assembly 110, for example, a mast assembly moving motor 126a for driving the belt 127 (FIG. 6) As a result, it is possible to move to a predetermined position in the longitudinal direction of the truss assembly 110.

The mast assembly 130 is provided with a gripper capable of picking up cargo, and includes a lifting motor 132 for a lifting motion to allow the gripper to pick up the cargo and lift or lower it. A separate motor (not shown) for adjusting the gap between the grippers so that the grippers contact the side surfaces of the cargo is also provided in the mast assembly 130. Accordingly, in the gantry crane device according to an embodiment of the present invention, the truss assembly 110 moves to a predetermined position in the X direction (or the reverse direction thereof), and the mast assembly 130 is moved to a predetermined position in the Y direction (or the reverse direction thereof). It can be moved to the location of the vehicle to pick up or move the cargo.

On the other hand, the traveling bogie assembly 100 extends in the longitudinal direction of the first traveling track 182a and extends in the longitudinal direction sliding on the first traveling track 182a, and the first sliding body 142a. It includes a second sliding body 142b extending in the longitudinal direction of the second traveling track 182b and extending in the longitudinal direction sliding on the second traveling track 182b.

In addition, the traveling bogie assembly 100 includes a first orbital sliding drive motor 122a that generates a driving force that causes the first sliding body 142a to slide on the first traveling track 182a, and the truss assembly 110 It is provided at a position corresponding to the first running track 182a of both side ends of the. Similarly, the traveling bogie assembly 100 includes a second orbital sliding drive motor 122b that generates a driving force that causes the second sliding body 142b to slide on the second traveling track 182b, and the truss assembly 110 ) Is provided at a position corresponding to the second running track 182b of both side ends.

The first orbital sliding drive motor (122a), the second orbital sliding drive motor (122b), the mast drive motor (126a), the lifting motor 132 is a gantry crane device is a traveling bogie assembly 100 and a mast assembly ( 130) is moved on the X and Y planes and the gripper is moved in the Z direction, and it operates independently as an optimal algorithm that can shorten the working time in the process of picking up or unloading cargo.

Referring to FIG. 1, a wiring line 189 is disposed adjacent to the second travel orbit 182b and parallel to the second travel orbit 182b. While the traveling bogie assembly 100 moves on the first traveling track 182a and the second traveling track 182b, the traveling bogie assembly 100 can continuously receive power from the wiring line 189.

1 and 2, end frames 187 defining movement limits of the traveling bogie assembly 100 at both ends of each of the first traveling tracks 182a and the second traveling tracks 182b in the longitudinal direction. ) Are installed respectively. Each end frame 187 is provided with a traveling bogie assembly 100 and a longitudinal shock absorber body 184 capable of absorbing an impact upon impact, and the longitudinal shock absorber body 184 is provided with, for example, hydraulic or It is equipped with a longitudinal shock absorber rod that is operated pneumatically. The longitudinal shock absorber rod extends in the longitudinal direction of the first travel track 182a and the second travel track 182b and contacts the contact frame of the protruding frame portion formed in the travel bogie assembly 100, thereby making the traveling truck assembly 100 ), while limiting the movement, absorbs the shock at the same time.

A power transmission device according to an embodiment of the present invention is a power transmission device that moves the mast assembly 130 in the Y direction (or the reverse direction) to a predetermined position in the gantry crane device shown in FIG. 1. That is, the power transmission device according to an embodiment of the present invention is on the truss assembly 110 of the traveling bogie assembly 100 moving on the first traveling track 182a and the second traveling track 182b extending parallel to each other. It is a power transmission device for a gantry crane that moves the mast assembly 130 to cross the first travel track and the second travel track.

FIG. 2 shows a first pulley 167a disposed corresponding to the upper side of the first travel track 182a and a configuration around the first pulley 167a. 3 is an explanatory view of a vertical section of a prime mover pulley of the power transmission device of FIG. 2.

Meanwhile, FIG. 6 is a partially enlarged view of FIG. 5 (belt is omitted to simplify the structure), and FIGS. 5 and 6 are a second pulley disposed corresponding to the upper side of the second running track 182b. (167b) and the configuration around it are shown.

1 to 3 and 5, the power transmission device for the gantry crane according to an embodiment of the present invention includes the first pulley (167a), the second pulley located opposite to the first pulley. (167b) and a belt 127 circulating to form a closed loop track between the first pulley and the second pulley.

The belt 127 may be a timing belt provided with teeth formed at predetermined distances on the inner side of the closed loop for accurate driving force and driving position control, but is not limited thereto, and various types of belts may be used. have.

As shown in FIG. 3, when the belt 127 is a timing belt, the first pulley 167a has a first pulley tooth 167at of a complementary shape on its outer circumferential surface, and is shown in FIG. As described above, the second pulley 167b may also have a second pulley tooth shape having a complementary shape.

Again, referring to Figures 2 and 3, the power transmission device of the gantry crane device according to an embodiment of the present invention is provided with at least one guide pulley (169u, 169d) in contact with the outer surface of the belt (127). The guide pulleys 169u and 169d are disposed adjacent to the first pulley 167a, which is a driving pulley driven by the mast assembly moving motor 126a.

3, the guide pulley 169u is the sum of the radius r2 of the guide pulley 169u, the radius r1 of the first pulley 167a, and the thickness t1 of the belt ( r1+r2+t3) is greater than the height difference h1 between the center of the rotation axis 167ac of the first pulley 167a and the center of the rotation axis of the guide pulley 169u toward the second pulley 167b. It is placed offset.

Optionally, the guide pulley 169d disposed below the guide pulley 169u is also the radius of the guide pulley 169d, the radius r1 of the first pulley 167a, and the thickness t1 of the belt. Offset toward the second pulley (167b) so that the sum (r1+r2+t3) is greater than the height difference between the center of the rotation axis 167ac of the first pulley 167a and the center of the rotation axis of the guide pulley 169d Can be deployed.

In this case, the guide pulley 169u and the guide pulley 169d are offset-displaced by α and β, respectively, from a vertical line with respect to the center of the first pulley.

Meanwhile, referring to FIG. 1, the power transmission device for a gantry crane according to an embodiment of the present invention drives the first pulley 167a to transfer the mast assembly 130 to the first pulley 167a (FIG. 2 ). It includes a mast assembly movement motor 126a that moves the position between the second pulleys 167b (FIG. 5).

2 and 5 and 6, the power transmission device for a gantry crane according to an embodiment of the present invention includes a rotation shaft 167ac of the first pulley 167a and the second pulley 167b. Pulley front cover plate 163b supporting each of the rotating shaft 167bc: pulley front cover plate for the first pulley in FIG. 2 is not shown), pulley rear cover plates 161a and 161b, and the pulley front cover plate And a pulley base plate 171b that is commonly connected to and supported by the pulley rear cover plate: a pulley base plate for the first pulley in FIG. 2 is shown, but reference numerals are omitted). 165b: In FIG. 2, a pulley base plate for the first pulley is shown, but reference numerals are omitted).

Specifically, the description will be made based on the second pulley 167b with reference to FIGS. 5 and 6. The same applies to the case of the first pulley. The second pulley 167b is a second pulley front cover plate 163b and a second pulley rear cover plate 161b and a second pulley connected to and supporting the second pulley front cover plate and the second pulley rear cover plate. It is surrounded by a pulley base plate 171b.

It is preferable that the second pulley front cover plate 163b and the second pulley rear cover plate 161b are disposed substantially perpendicular to the second pulley base plate 171b to be welded together. However, as mentioned in the above-described problem of the prior art, in welding the second pulley front cover plate 163b and the second pulley rear cover plate 161b to the second pulley base plate 171b, welding Due to the deformation of the plate itself is likely to occur, this problem may cause a subsequent problem that the plate assembly is assembled differently from the design.

The power transmission device for a gantry crane according to an embodiment of the present invention in this case is assembled as originally designed due to various problems during assembly, such as deformation during welding of the plate assembly that determines the position of the rotation axis of the pulley while surrounding the pulley. Pulley cover plate assembly for controlling the tension of the belt 127 between the first pulley 176a and the second pulley 167b by intentionally causing deformation of the pulley cover plate assembly in order to solve the problem that cannot be installed. It includes a deformable part.

6, the pulley cover plate assembly deformation portion of the power transmission device for a gantry crane according to an embodiment of the present invention is characterized by at least one of the pulley front cover plate 163b and the pulley rear cover plate 161b. And a transmission member 169b extending along a contact surface of one and the pulley base plate 171b. In FIG. 6, the second pulley is shown as a reference, but the pulley cover plate assembly deformable part may be similarly applied to the first pulley.

The transmission member 169b has an elongated hexahedral shape and has a rod shape as a whole. One side of the transmission member in the longitudinal direction is in contact with the second pulley front cover plate 163b or the second pulley rear cover plate 161b, and the other side in the adjacent longitudinal direction is in contact with the second pulley base plate 171b. It is done.

7 is a cross-sectional view taken along the line VII-VII of FIG. 6, and FIG. 8 is a description of a change in stress in the cross-section of FIG. 7.

As shown in Figure 7, the pulley cover plate assembly deformation portion of the power transmission device for a gantry crane according to an embodiment of the present invention is formed on the transmission member (169b), the surface of the second pulley base plate (171b) It includes a transmission member through-hole (169bh) opened toward. In addition, the pulley cover plate assembly deforming part includes a deformable member 174b having a thread formed thereon so as to be inserted into contact with the surface of the second pulley base plate 171b through the transmission member through hole 169bh. . The deformable member 174b may be formed of a screw having a head portion. A thread complementary to the inner diameter of the transmission member through hole 169bh through which the deformable member 174b passes is formed.

7 and 8, the deformable members 174b are arranged in pairs along the length direction of the transmission member 169b. A second pulley cover plate fixing member 173b and a second pulley base plate fixing member 172b are disposed outside the pair of deformable members 174b along the longitudinal direction of the transmission member 169b. The second pulley base plate fixing member 172b fixes the transfer member 169b to the second pulley base plate 171b. The second pulley cover plate fixing member 173b fixes the transfer member 169b to the second pulley front cover plate 163b. The fixing member 172b may be formed of a screw having a head portion. It is preferable that the second pulley cover plate fixing member 173b and the second pulley base plate fixing member 172b are arranged in pairs. As shown in FIG. 7, a second pulley base plate fixing member 172b and a second pulley cover plate fixing member 173b are formed in two pairs at a position higher than the height of the rotation shaft 167bc of the second pulley. Doedoe arranged, the second pulley base plate fixing member and the second pulley cover plate fixing member are arranged in a pair at a position lower than the height of the rotation axis of the second pulley.

According to FIG. 7, the arrangement height of the center of the rotation shaft 167bc of the second pulley 167b is included between the distances between the deformable members 174b arranged in pairs along the length direction of the transmission member 169b. Is placed. That is, the deformable member disposed on the upper side of the pair of deformable members 174b is disposed at a position higher than the rotation axis of the second pulley, and the deformable member disposed at the lower side of the pair of deformable members is at a position lower than the rotation axis of the second pulley. Is placed.

In the deformed portion of the pulley cover plate assembly of the power transmission device for a gantry crane according to an embodiment of the present invention, the length of the transmission member among the pairs of the deformable members 174b respectively disposed with a height difference of h2 on the upper side and the lower side The height difference (h3) between the deformable member disposed at the upper side along the direction and the center of the rotation shaft 167bc of the second pulley is determined by the deformable member disposed at the lower side along the length direction of the transmission member among the pair of deformable members. It is configured to be smaller than the height difference h4 between the centers of the rotation shaft 167bc of the second pulley.

Due to the positional relationship between the position of the pair of deformable members and the center of the pulley rotation axis, the rotation moment according to the weight of the pulley itself and the rotation moment according to the tension of the belt are the deformable member 174b at the contact point 171bs of the base plate 171b It can be effectively canceled out by the compressive force that contacts and deforms.

FIG. 8 schematically shows the deformation force generated on the base plate by applying a compressive force to the contact point 171b by the deformable member 174b in contact with the contact point 171b of the base plate 171b. In a state in which the second pulley cover plate fixing member 173b and the second pulley base plate fixing member 172b are fixing the second pulley cover plate and the second pulley base plate to the transmission member 169b, the deformable member 174b ) Applies a pressing force to the base plate, so that gaps G1 and G2 having a thickness of t2 and t3 may be generated between the transmission member 169b and the base plate 171b, respectively. Optionally, the gap may be formed in the transmission member 169b when the base plate has a higher rigidity. 7 and 8 are illustrated with respect to the front cover plate of the second pulley, but the same can be said of the rear cover plate of the second pulley, and a transmission member and a deformable member may be disposed. In addition, the same can be applied to the first pulley.

This is a detailed description of specific embodiments in the invention, but this invention is not limited thereto, and this invention is capable of various modifications by those of ordinary skill in the art to which the present invention belongs, and these modifications are the scope of the invention. Included in

With regard to interpretation, it can be understood that this invention may be embodied in a modified form without departing from the essential characteristics of the invention.

The disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the invention is shown in the claims rather than the above description, and differences within the scope equivalent thereto should be construed as being included in the invention.

In the case of terms whose meaning is not particularly defined in the present invention, it should be broadly interpreted as a general meaning, and should be interpreted as including other terms in an equal range.

100: traveling bogie assembly 110: truss assembly
114: inclined support beam
122a: first orbital sliding drive motor
122b: second orbital sliding drive motor
123b: second orbital sliding drive motor case
125b: second orbital sliding drive motor case spacer
126a: mast assembly moving motor 127: belt
130: gripper assembly 132: lifting motor
142a: first sliding body 142b: second sliding body
161a: first pulley rear cover plate
161b: second pulley rear cover plate
162b: second pulley cover plate spacer
163b: second pulley front cover plate
165b: second pulley cover plate assembly
167a: first pulley 167ac: first pulley rotation shaft
167b: second pulley 167bc: second pulley rotation shaft
168b: second pulley rotation shaft cover
169b: second pulley side front transmission member
169bh: through hole of the front transmission member on the second pulley side
169u: upper guide pulley 169uc: upper guide pulley rotating shaft
169d: lower guide pulley 169dc: lower guide pulley rotating shaft
171b: second pulley base plate
171bs: second pulley base plate crimp section
172b: second pulley base plate fixing member
173b: second pulley cover plate fixing member
174b: second pulley side upper deformable member
175b: second pulley side lower deformable member
180: running track pair 181: track support column
182a: first travel orbit 182b: second travel orbit
187: end support 184: longitudinal shock absorber body
189: wiring line

Claims (8)

In the power transmission device for a gantry crane for moving a mast assembly to cross the first travel track and the second travel track on the truss assembly of the traveling bogie assembly moving on the first traveling track and the second traveling track extending in parallel. ,
The power transmission device for the gantry crane,
A first pulley disposed to correspond to an upper side of the first driving track;
A second pulley disposed to correspond to the upper side of the second driving track and positioned opposite the first pulley;
A belt circulating to form a closed loop track between the first pulley and the second pulley;
A mast assembly moving motor configured to move the mast assembly between the first pulley and the second pulley by driving the first pulley;
A pulley having a pulley front cover plate and a pulley rear cover plate respectively supporting the rotation shafts of the first pulley and the second pulley, and a pulley base plate that is commonly connected to and supported by the pulley front cover plate and the pulley rear cover plate. Cover plate assembly; And
Including; a pulley cover plate assembly deformation portion for controlling the tension of the belt between the first pulley and the second pulley by causing the deformation of the pulley cover plate assembly, and
A power transmission device for a gantry crane, characterized in that it further comprises a transmission member extending along a contact surface of the pulley base plate and at least one of the pulley front cover plate and the pulley rear cover plate. delete The method of claim 1,
A deformable member formed in the transmission member, a transmission member through hole opened toward the surface of the pulley base plate, and a deformable member having a thread formed thereon so as to be inserted into contact with the surface of the pulley base plate through the transmission member through hole. Power transmission device for a gantry crane, characterized in that it further comprises. The method of claim 3,
A power transmission device for a gantry crane, characterized in that the deformable members are arranged in pairs along the longitudinal direction of the transmission member. The method of claim 4,
It is disposed on the outside of the pair of deformable members along the longitudinal direction of the transmission member, further comprising a fixing member for fixing the transmission member to the base plate and at least one of the pulley front cover plate and the pulley rear cover plate A power transmission device for a gantry crane, characterized in that. The method of claim 5,
A power transmission device for a gantry crane, characterized in that the arrangement height of the center of the rotation shaft of at least one of the first pulley and the second pulley is included between the distance between the deformable members arranged in pairs and along the longitudinal direction of the transmission member . The method of claim 6,
The height difference between the deformable member disposed on the upper side of the pair of deformable members along the longitudinal direction of the transfer member and the center of the rotation axis of either the first pulley or the second pulley is of the transfer member among the pair of deformable members. A power transmission device for a gantry crane, characterized in that the height difference between the deformable member disposed at the lower side along the longitudinal direction and the center of the rotation shaft of either the first pulley or the second pulley. The method of claim 1,
Arranged adjacent to the first pulley and provided with a guide pulley in contact with the outer surface of the belt,
The first pulley is a driving pulley driven by the mast assembly moving motor,
The guide pulley comprises the second pulley so that the sum of the radius of the guide pulley, the radius of the first pulley, and the thickness of the belt is greater than a height difference between the center of the rotation axis of the first pulley and the center of the rotation axis of the guide pulley. Power transmission device for a gantry crane, characterized in that arranged toward the.

Images