JP6280759B2 - Traveling cart - Google Patents

Description

  The present invention relates to a traveling carriage capable of increasing the attractive force with respect to a steel plate without increasing the size of a magnet or the entire structure.

  A welding torch or a cutting torch is mounted on a traveling cart, and the mounted torch is operated along with the traveling of the traveling cart to perform welding or cutting on the steel sheet. Such a traveling cart needs to exert a large traction force in order to tow a hose and a power cord connected to the mounted torch. In particular, in welding or cutting performed using a traveling carriage, it is frequently performed to move the traveling carriage to the next work area after the welding or cutting of the target work area is completed. This movement of the traveling carriage is generally lifted and carried by an operator, and does not require traction.

  The applicant of the present application has proposed a traveling cart that exhibits a large traction force during work and reduces the traction force during transportation (see, for example, Patent Document 1 and Patent Document 2). In the technique described in Patent Document 1, a magnet is rotatably mounted on an axis provided on a traveling carriage, and an operator operates a lever to rotate the magnet so that the magnet is substantially horizontal with respect to the workpiece. The traction force is increased by applying a large attraction force by approaching each other, or the traction force is decreased by tilting the magnet to decrease the attraction force.

  In the technique described in Patent Document 2, a bottom plate made of a non-magnetic material is attached to the bottom surface of the casing, a magnet is placed on the bottom plate, and a large attracting force is applied to contact the attracting surface to increase the traction force, By operating the handle and tilting one side of the magnet away from the bottom plate, the attractive force is reduced and the traction force is reduced.

JP 2009-028753 A Utility Model Registration No. 3170533

  Recently, there has been a demand for a traveling carriage that can perform welding and cutting while adsorbing an inclined or standing steel plate. Such a traveling carriage is required to have a greater adsorption force for the steel plate than when performing welding and cutting while adsorbing and traveling the steel plates arranged in the horizontal direction.

  If simply increasing the attraction force, it can be realized by increasing the size of the magnet, but it is essential to increase the size of the cart body that accommodates the magnet. However, there is a possibility that the operability of a traveling cart that has been increased in size is likely to deteriorate, and it is the actual situation that customers are required to reduce the size of the traveling cart.

  An object of the present invention is to provide a traveling carriage capable of increasing the adsorption force to a steel plate without increasing the size.

In order to solve the above-mentioned problem, a traveling carriage according to the present invention is a traveling carriage that travels by applying an attractive force of a magnet to a steel sheet, and a casing that is provided with wheels before and after the bottom is opened and in the traveling direction; A drive motor that is disposed inside the casing and drives the wheel; a bottom plate that is provided with an opening having a preset size and is attached to the bottom of the casing to form an accommodation space inside the casing; A magnet that is held by a holding member and is housed in the housing space so as to be movable, and an inclined portion that is attached to the holding member that holds the magnet and that increases in distance from the lower side to the upper side in the front-rear direction. a support member, attached to the side along the running direction of the holding member holding the magnet, when the supporting member mounted to the holding member is accommodated in the accommodating space An operating member disposed outside the casing, and the support member includes an opening provided in the bottom plate on the bottom side of the magnet so that the interval between the inclined portions provided in the front and rear in the traveling direction is It is smaller than the dimension in the traveling direction, and is formed larger than the dimension in the traveling direction of the opening provided in the bottom plate on the upper side of the magnet, and the support member is formed from the opening provided in the bottom plate from the bottom of the casing. Is also configured to protrude downward.

  In the traveling carriage, it is preferable that the support member has a bottom portion facing the bottom surface of the magnet, and inclined portions are provided on the front and rear sides of the bottom portion.

  In any of the above traveling carriages, the holding member is provided with a height adjusting member before and after the traveling direction, and by operating the height adjusting member, the bottom surface of the magnet and the casing It is preferable that the distance between the bottom plate attached to the bottom portion can be adjusted.

  In the traveling cart according to the present invention, it is possible to increase the adsorption force with respect to the steel plate without increasing the overall configuration of the cart. That is, the magnet is attached to the support member via the holding member, and the inclined portion of the support member is supported in contact with the edge of the opening of the bottom plate attached to the bottom of the casing. In particular, the inclined portions provided before and after the support member have an interval smaller than the dimension of the opening in the traveling direction on the bottom side of the magnet, and an interval larger than the dimension of the opening in the traveling direction on the upper side of the magnet. It has a flat surface or curved surface, or a combination of a flat surface and a curved surface.

  Therefore, when the supporting member to which the magnet is attached is accommodated in the accommodating space formed inside the casing, the supporting member is supported with a part of the inclined portion coming into contact with the edge of the opening of the bottom plate. For this reason, the support member on the bottom side of the magnet protrudes from the opening toward the lower side of the casing, and the magnet can be brought closer to the steel plate by this protrusion, and as a result, the attractive force to the steel plate is increased. Can do. Therefore, it is possible to realize a traveling cart with an increased traction force.

  Further, even when an obstacle such as a weld bead or any protrusion is present on the surface of the steel plate to be traveled, the obstacle does not adversely affect the travel of the traveling carriage. That is, when the support member on the bottom surface side of the magnet protrudes downward from the casing, since the inclined portion is disposed before and after the traveling direction, the inclined portion first comes into contact with the obstacle. The support member is supported only by a part of the inclined portion coming into contact with the edge of the opening, and the position of the support member is free to move upward. You can move on and get over.

  Moreover, since the supporting member has a bottom portion facing the bottom surface of the magnet, and an inclined portion is provided before and after the bottom portion, the bottom surface of the magnet is covered with the bottom portion of the supporting member. For this reason, even if spatter and slag are generated during welding or cutting, they do not directly adhere to the attracting surface, which is the bottom surface of the magnet.

  Moreover, since the height adjustment member is provided in the holding member holding a magnet, the protrusion dimension from the opening part of the bottom face side of the magnet in a support member can be adjusted. For this reason, the distance between the magnet and the steel plate can be adjusted to adjust the attractive force.

It is a three-view figure explaining the structure of a traveling trolley | bogie. It is a figure explaining the operation of a lever and the relation of a long hole. It is a figure explaining the traveling state of a traveling trolley. It is a figure explaining a state when a holding member collides with an obstacle. It is a figure explaining the state where a holding member gets over an obstacle. It is a figure explaining the state where the holding member got over the obstacle.

  A traveling vehicle according to the present invention will be described. The traveling carriage according to the present invention realizes stable traveling by applying a traction force due to the attractive force of a magnet when traveling on a steel plate, and particularly improves the attractive force without increasing the overall structure. It is made to let you. The working member that is mounted on the traveling carriage and performs a desired work as the traveling carriage travels is not limited. For example, a welding torch for welding steel sheets or a cutting torch for cutting steel sheets There is. Moreover, the apparatus which sprays while running on a steel plate, and the coating apparatus which performs coating may be sufficient.

  In the traveling cart according to the present invention, in order to improve the attracting force without increasing the magnet, the support member attached to the holding member holding the magnet is protruded from the bottom surface of the casing so that the magnet approaches the steel plate. Yes. When making a magnet approach with respect to a steel plate, both separation distance is not limited and it is preferable to make it as small as possible.

  However, the closer the support member is to the steel plate, the more likely it will collide with obstacles such as weld beads or spatters present on the steel plate, so the support member has a higher degree of freedom in vertical movement and tilting. It is preferable. A mechanism for freely moving the support member in the vertical direction and a mechanism for freely tilting the support member are not particularly limited. For example, the support member or a holding member that holds the magnet may be biased by a spring.

  In addition, an inclined portion is formed so that the distance between each other increases from the lower side to the upper side of the support member in the traveling direction, and an opening for locking the inclined portion of the support member to the bottom plate of the casing is formed. You may comprise so that a part of inclination part may be supported in contact with the edge of an opening part. In this case, the protrusion dimension of the support member is defined according to the dimension of the opening and the inclination angle of the inclined portion of the support member. The shape of the inclined portion formed before and after the support member is not limited, and may be a linear plane along the inclination direction, a curved curved surface, or a combination of a plane and a curved surface.

  Moreover, it is preferable that the protrusion dimension of the support member from the casing can be adjusted so that an optimum suction force can be exhibited according to the type of work to be performed. For this reason, it is comprised so that the distance from the steel plate of a support member can be set suitably by providing a height adjustment member in the holding member holding a magnet, and operating this height adjustment member.

  The direction of action of the attracting force on the steel plate by the magnet and the traveling direction of the traveling carriage are configured to be orthogonal to each other. For this reason, it is necessary to transmit and support to the casing the force generated as the traveling carriage travels. The structure for transmitting this force is not particularly limited. For example, the structure may be such that the support member comes into contact with the bottom plate, or the structure in which the joint between the holding member and the operation member comes into contact with the casing. It is possible to transmit the force generated by the adsorption to the casing.

  Next, the configuration of the traveling carriage A according to the present embodiment will be described. First, the overall configuration of the traveling carriage A will be briefly described with reference to FIGS. The traveling carriage A is placed on a horizontally arranged steel plate B, and along a steel plate (not shown) that stands up from the steel plate B, the arrow a and b directions (hereinafter, the arrow a direction is the front and the arrow b direction is the rear. In other words, the steel plates can be welded to the intersecting corners of the steel plates. In particular, it is possible to increase the attraction force to the steel plate B and exhibit a larger traction force without increasing the size.

  Accordingly, a welding torch (not shown) is attached to the torch holder 31a described later, and a hose for supplying gas, a hose through which a welding line passes, and a hose such as a power cord are connected to the welding torch. However, the torch to be attached to the torch holder 31a is not limited to a welding torch, and a cutting torch such as a gas cutting torch or a plasma cutting torch can be attached. In this case, a mechanism or member peculiar to the selected cutting torch, such as a valve mechanism for supplying gas or a relay member for a cap tire cable for energizing, is mounted at a predetermined position of the traveling carriage A, and is necessary. A hose for supplying various gases and a hose such as a power cord are connected.

  The traveling carriage A has a casing 1 whose upper part is covered with a cover 1a. A plurality of wheels 21 are rotatably disposed at both ends in the front-rear direction, which is the traveling direction of the casing 1. At least one of the wheels 21 is configured as a drive wheel driven by a drive motor 22, and the other wheel 21 is configured as a driven wheel. However, the number of wheels 21 to be used as drive wheels is not limited, and two wheels or four wheels may be configured as drive wheels.

  On the upper surface of the cover 1a, a socket 23 for connecting a power cord, a push button switch 24 for operating the operation of the traveling carriage A, a snap switch 25 for setting the traveling direction of the traveling carriage A and stopping traveling, A dial 26 for adjusting the speed and an LED 27 for displaying the operation mode of the traveling carriage A are provided, and a control device 28 for controlling the operation of the traveling carriage A is provided therein.

  On one side surface of the casing 1, guide rollers 30 a are arranged at both end portions in the front and rear directions in the traveling direction. Each of these guide rollers 30a is rotatably provided at the tip of an arm 30b configured to be extendable and retractable. When performing fillet welding, the guide rollers 30a are placed on the surface of the steel plate arranged upright on the steel plate B. It is configured to be able to contact and guide the traveling of the traveling carriage A.

  A torch adjusting device 31 having a torch holder 31a for attaching a torch (not shown) to any end portion in the front-rear direction of the casing 1 constituting the traveling carriage A (the end portion on the rear side in this embodiment) is provided. In this torch adjusting device 31, a torch holder 31a is arranged at the approximate center of the traveling carriage A and on the guide roller 30a side, and the position of the torch holder 31a is adjusted to adjust the position of the torch holder 31a so that the position of the torch is welded. It is possible to adjust to an optimal position.

  A bottom plate 3 made of a nonmagnetic material such as aluminum, copper, or synthetic resin is provided at the bottom of the casing 1. Further, the drive motor 22 is disposed inside the casing 1 and inclined upward, and a gear 22a fixed to the drive shaft of the drive motor 22 meshes with a gear 21b fixed to the drive shaft 21a of the wheel 21. ing.

  An opening 4 having a dimension set in advance corresponding to the dimension of a magnet body C described later is formed at a predetermined position of the bottom plate 3, and an inclined part 3 a is formed toward the opening 4. . Therefore, when the bottom plate 3 is attached to the bottom portion of the casing 1 so that the inclined portion 3a protrudes outward from the casing 1, the bottom portion is defined by the bottom plate 3 and the upper portion is defined by the drive motor 22. A space 2 is formed.

  Accordingly, the housing space 2 protrudes outward from the line connecting the bottom of the casing 1, and when the traveling carriage A is placed on the steel plate B, the opening 4 formed in the bottom plate 3 is more than the bottom of the casing 1. Will also approach the steel plate B. However, the shape and size of the housing space 2 are not limited, and it is preferable to set the shape and size of the magnet body C to be housed and the conditions necessary for the magnet body C to move. .

  The magnet 6 is held by a holding member 7 formed in a box shape so that the upper surface and the front, rear, left and right side surfaces are surrounded, and a support member 8 disposed on the lower surface side is attached to and supported by the holding member 7. Thus, the entire surface is protected by the holding member 7 and the support member 8 without being exposed. Therefore, the magnet 6 is configured as one assembly (hereinafter also referred to as “magnet body C”) together with the holding member 7 and the support member 8.

  A plurality of screw holes 7a to which bolts 10a for attaching the lever 10 serving as the operation member are fastened are formed on the side surface of the holding member 7 along the traveling direction. A pair of elongated holes 11 through which the bolts 10a pass are formed in the vertical direction at positions facing the screw holes 7a of the holding member 7 on the side surfaces along the traveling direction of the casing 1.

  And after accommodating the magnet body C in the accommodation space 2 and interposing the spacer 10b between the casing 1 and the lever 10, the bolt 10a is inserted into the lever 10, the spacer 10b, and the long hole 11, and the screw of the holding member 7 is inserted. Fastened to the hole 7a. Therefore, the lever 10 is arranged with the casing 1 so as to be separated from the casing 1 by a distance corresponding to the thickness of the spacer 10b and integrated with the magnet body C.

  When the operator holds the handle of the lever 10 which is the operation portion of the operation member and operates as shown by a solid line or a two-dot chain line in FIG. 2, the posture of the magnet body C is parallel to or inclined with respect to the steel plate B. By doing so, it is possible to change the attraction force of the magnet 6 to the steel plate B.

  The support member 8 is a bottom portion opposed to the bottom surface of the magnet 6, and a flat surface portion 8 a having a size necessary for covering the lower surface of the holding member 7, and formed in front and rear of the flat surface portion 8 a, and is formed from below to above each other. And an inclined portion 8b that is inclined so as to increase the distance between them. Further, upright standing pieces (not shown) are formed on the side surfaces of the flat portion 8a and the inclined portion 8b of the support member 8, and the support member 8 is formed in a tray shape as a whole.

  The dimension in the width direction of the support member 8 (the outer dimension of a standing piece not shown) is slightly smaller than the width dimension of the opening 4 of the bottom plate 3 attached to the bottom of the casing 1. Further, the dimension in the front-rear direction of the flat part 8 a of the support member 8 is sufficiently smaller than the dimension in the front-rear direction of the opening 4, and the interval between the uppermost ends of the inclined part 8 b is sufficiently larger than the dimension in the front-rear direction of the opening 4. It is formed in the shape which combined the plane, the curved surface, or the plane and the curved surface so that it may become large.

  For this reason, when the magnet body C is housed in the housing space 2, in the magnet body C, the flat portion 8 a of the support member 8 passes through the opening 4 of the bottom plate 3, and a part of the inclined portion 8 b is in the front-rear direction of the opening 4. Supported in contact with the edges of the. That is, the projecting dimension of the magnet body C from the bottom plate 3 is defined by the dimension in the front-rear direction of the flat part 8 a and the dimension in the front-rear direction of the opening 4.

  In the present invention, the dimension in the front-rear direction of the plane part 8a and the distance between the uppermost ends of the inclined part 8b are not limited. The dimension in the front-rear direction of the opening 4, the distance from the bottom plate 3 to the steel plate B, etc. It is preferable to set appropriately according to the conditions.

  However, it may be preferable to adjust in advance the projecting dimension of the magnet body C from the bottom plate 3. For this reason, height adjusting members 13 are provided on the front and rear side surfaces of the holding member 7. The height adjusting member 13 includes a bracket 13a fixed to the holding member 7 and a plurality of bolts 13b that are screwed into the bracket 13a. The bolt 13b is screwed so as to protrude downward from the upper side of the bracket 13a, and the tip of the bolt 13b comes into contact with the bottom plate 3 attached to the bottom portion of the casing 1 so that the height of the magnet body C relative to the bottom plate 3 (from the bottom plate 3). It is possible to adjust the dimension protruding outside).

  Next, when traveling on the steel plate B by the traveling carriage A configured as described above, if an obstacle D such as a spatter, a bead or a misplaced plate material exists on the steel plate B, it collides with the obstacle D. The operation of the magnet body C will be described with reference to FIGS.

  First, as shown in FIG. 3, the magnet body C is accommodated in the accommodating space 2 in advance, and the bolt 13 b of the height adjusting member 13 is operated to adjust the protruding dimension of the magnet body C from the bottom plate 3 attached to the casing 1. To do. At this time, the extent to which the magnet body C can be protruded from the bottom plate 3 is not limited, and it is preferable to set appropriately according to conditions such as the characteristics of the torch mounted on the traveling carriage A and the inclination of the steel plate B with respect to the horizontal line. . For example, when the traveling carriage A is equipped with a welding torch and the steel plate B is inclined at a steep angle including the vertical, the height is such that the distance between the magnet body C and the steel plate B is about 1 mm. It is preferable that the adjustment member 13 is operated and adjusted.

  The projecting dimension of the magnet body C from the bottom plate 3 is adjusted by the height adjusting member 13. At this time, a gap is formed between the inclined portion 8 b of the support member 8 constituting the magnet body C and the front-rear direction edge of the opening 4. Thereafter, the traveling carriage A is placed on the steel plate B, and welding with a welding torch (not shown) is started to start traveling in the direction of arrow a. As a result, the traveling carriage A travels, and the target welding is performed along with the traveling. At the time when the traveling carriage A starts traveling, the obstacle D is in front, and the magnet body C keeps a preset interval between it and the steel plate B.

  At this time, the attracting force of the magnet body C acts on the steel plate B, and the acting direction of the attracting force is orthogonal to the traveling direction of the traveling carriage A. For this reason, as the traveling carriage A travels, the elongated hole 11 formed in the casing 1 abuts on the bolt 10a inserted through the elongated hole 11, and the magnet body C is dragged via the bolt 10a. Continue.

  The traveling carriage A travels in the direction of arrow a, and the inclined portion 8b of the support member 8 constituting the magnet body C first collides with an obstacle as shown in FIG. However, although a slight impact occurs at the moment when the support member 8 collides with the obstacle D, the traveling carriage A continues to travel in the direction of arrow A.

  As the traveling carriage A continues to travel, the inclined portion 8b of the support member 8 constituting the magnet body C slides along the surface of the obstacle D as shown in FIG. Get on. At this time, the magnet body C holds the contact of the bolt 13b constituting the rear height adjusting member 13 with the bottom plate 3, and the front height adjusting device 13 is lifted from the bottom plate 3 and inclined.

  As the traveling carriage A travels further in the direction of arrow a, the magnet body C rides on the upper surface of the obstacle D as shown in FIG. At this time, the flat portion 8 a of the support member 8 constituting the magnet body C is substantially parallel to the surface of the steel plate B. Therefore, the bolt 10 a integrating the magnet body C and the lever 10 moves upward along the pair of long holes 11.

  In the traveling carriage A configured as described above, regardless of the distance between the bottom plate 3 attached to the bottom of the casing 1 and the steel plate B, the distance between the magnet body C (magnet 6) and the steel plate B can be reduced. It becomes. For this reason, it is possible to increase the attractive force without increasing the size of the magnet and hence the size of the casing 1.

  Further, the magnet body C in which the magnet 6, the holding member 7, and the support member 8 are integrated is configured to be movable within the accommodation space 2 when accommodated in the accommodation space 2. For this reason, even when the magnet body C collides with the obstacle D existing on the steel plate B, it is possible to move up and down and get over the obstacle D.

  The traveling cart according to the present invention is not limited to welding, but is advantageously used for cutting.

A traveling carriage B steel plate C magnet body D obstacle 1 casing 1a cover 2 accommodating space 3 bottom plate 3a inclined portion 4 opening 6 magnet 7 holding member 7a screw hole 8 support member 8a flat surface portion 8b inclined portion 10 lever 10a bolt 10b spacer 11 Long hole 13 Height adjusting member 13a Bracket 13b Bolt 21 Wheel 21a Drive shaft 21b, 22a Gear 22 Drive motor 23 Socket 24 Pushbutton switch 25 Snap switch 26 Dial 27 LED
28 Control Device 30a Guide Roller 30b Arm 31 Torch Adjustment Device 31a Torch Holder

Claims (3)

A traveling vehicle that travels by applying an attractive force of a magnet to a steel plate,
A casing whose bottom is opened and wheels are provided before and after the traveling direction;
A drive motor disposed inside the casing for driving the wheel;
An opening having a preset dimension, and a bottom plate attached to the bottom of the casing to form a housing space inside the casing;
A magnet held by a holding member and accommodated in the accommodation space so as to be movable;
A support member that is attached to a holding member that holds the magnet, and that is provided with an inclined portion in which the distance between the front and rear in the traveling direction increases from below to above;
An operation member that is attached to a side surface along the traveling direction of the holding member that holds the magnet, and the operation portion is disposed outside the casing when the support member to which the holding member is attached is accommodated in the accommodation space; Have
In the support member, the interval between the inclined portions provided before and after in the traveling direction is smaller than the dimension in the traveling direction of the opening provided in the bottom plate on the bottom side of the magnet, and the opening provided in the bottom plate on the upper side of the magnet. A traveling carriage characterized in that it is formed larger than the dimension of the portion in the traveling direction, and the support member can protrude downward from the bottom of the casing from an opening provided in the bottom plate.   The traveling carriage according to claim 1, wherein the support member has a bottom portion facing the bottom surface of the magnet, and an inclined portion is provided on the front and back of the support member.   The holding member is provided with height adjusting members before and after in the traveling direction, and the distance between the bottom surface of the magnet and the bottom plate attached to the bottom of the casing can be adjusted by operating the height adjusting member. It is comprised as follows, The traveling trolley | bogie as described in Claim 1 or 2 characterized by the above-mentioned.

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