JP2005238897A - Work carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work carriage improved in working efficiency. <P>SOLUTION: A top plate 3 is horizontally and rotatably attached to the upper face of a carriage body 1 with casters 2. A top plate fixing device 4 fixing the rotating top plate 3 at an arbitrary rotational position is provided in the carriage body 1. A jack device 7 placing and keeping the carriage body 1 on a floor face A while raising the casters 2 from the floor face A from stepping on a jack fixing pedal 5 till stepping on a jack release pedal 6 is provided in the carriage body 1. A roller conveyor device 9 with a number of rotatable rollers 8 horizontally provided in a row is set on the top plate 3. A fixing plate 10 press-contacted with the rollers 8 to disenable the rotation of the rollers 8 when a product B is placed is attached to the roller conveyor device 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a work carriage suitably used in a cell production system.

  In recent years, a cell production system suitable for high-mix low-volume production has been attracting attention in order to meet the diverse needs of customers. This cell production system is a multi-skilled production system in which one worker is responsible for multiple processes such as assembly, inspection, and packing. Specifically, multiple process units are installed along the production line. In this system, the work cart is moved along the production line, and the products are sequentially assembled, inspected and packed on the work cart.

  An example of a work cart suitably used in this cell production system is shown in FIG. 13 (see, for example, Patent Document 1). In order to improve the working efficiency of the operator, this work cart is provided with a fixed pedal 32 that can swing up and down at the bottom of the cart body 1 having the casters 2, and the top plate 3 is attached to and detached from the upper surface of the cart body 1. Arranged freely and horizontally rotatable. Specifically, when the operator steps on the fixed pedal 32, the lower surface of the fixed pedal 32 is pressed against the floor surface so that the cart body 1 is in a fixed state. The top plate 3 can be removed from the cart body 1 and the product can be carried out together with the top plate 3 to the next process, etc. By rotating horizontally, the product on the top plate 3 can be operated from various angles.

  However, the fixed pedal 32 is used to fix the cart body 1 only when the operator depresses, that is, the operator is forced to work with the fixed pedal 32 depressed. However, there is a problem that when the work cart is separated from the work cart, the work cart is released from the fixed state and the work efficiency of the operator is lowered. In the cell production system, workers often leave the work cart to collect built-in parts and tools, but the fixed state is released each time they leave. It is necessary to stand in a predetermined position 1 and depress the fixed pedal 32 to fix the cart body 1 again, and the operator has to go around to the position where the fixed pedal is provided each time work is resumed. As a result, the work efficiency of the operator is reduced.

  Although it is conceivable to use a brake device attached to the caster 2 to keep the work carriage fixed on the floor surface, the caster 2 that rolls on the floor surface has a small contact area with the floor surface. Even if the caster 2 cannot be rotated by this, a large frictional resistance cannot be obtained, and the work carriage often slides on the floor surface when applying work such as caulking to the product. There is no hope of improving efficiency.

  In addition, the work for carrying out and carrying in the product in the work cart of FIG. 13 is performed by lifting the product or lifting the top plate 3 on which the product is placed from the cart body 1, but when the product is heavy, This work is burdensome to the worker, and may cause fatigue of the worker and reduce work efficiency.

In addition, although the top plate 3 in the work cart shown in FIG. 13 is arranged so as to be horizontally rotatable with respect to the cart body 1, there is no mechanism for fixing the rotational position of the top plate 3. When performing an operation that applies a force such as caulking, the top plate 3 may rotate unexpectedly due to this force, and the operation may be interrupted and the work efficiency may be reduced.
JP 2003-137102 A

  The present invention has been invented in view of the above-described conventional problems, and even when an operator leaves the work carriage, the state where the work carriage is fixed to the floor surface is maintained, and smooth work restart is possible. In addition, the work efficiency of the worker was improved by reducing the burden on the worker for loading and unloading the product to and from the work cart, and by making the product placed on the work cart easily fixed. It is an object to provide a work carriage.

  In order to solve the above-mentioned problems, a work cart according to claim 1 of the present invention is such that a top plate 3 is mounted on the upper surface of a cart body 1 having casters 2 so as to be horizontally rotatable, and the rotating top plate 3 is placed at an arbitrary rotational position. A top plate fixing device 4 is fixed to the cart body 1 and the caster 2 is floated from the floor surface A until the jack release pedal 6 is depressed until the jack release pedal 6 is depressed. A jack device 7 that is placed and maintained is provided on the carriage main body 1, and a roller conveyor device 9 in which a large number of rotatable rollers 8 are horizontally arranged is placed on the top plate 3, and when the product B is placed, the rollers 8 A fixed plate 10 that presses against the roller 8 to make the roller 8 unrotatable is attached to the roller conveyor device 9.

  According to this, there is provided a jack device 7 that floats the caster 2 from the floor surface A and keeps the cart body 1 placed on the floor surface A from when the jack fixing pedal 5 is depressed to when the jack release pedal 6 is depressed. The work carriage can be placed and fixed on the floor surface A even when the worker is away from the work place, so that the worker who has returned to the work place can resume work such as assembly without delay. Since the top plate fixing device 4 for fixing the rotating top plate 3 to an arbitrary rotational position is provided, the top plate 3 does not rotate when a work such as caulking is applied to the product B. Since it is possible to apply the work to the product B from all angles, the roller conveyor device 9 in which a large number of rotatable rollers 8 are arranged in a row on the top plate 3 is installed. To work cart The product B can be easily carried in and out by a sliding operation on the roller 8, and the roller conveyor device 9 is pressed against the roller 8 when the product B is placed on the roller 8. Since the fixing plate 10 is attached so that the product B on the roller 8 cannot be rotated, the product B on the roller 8 is simply slid and placed on the fixing plate 10 so that the fixing plate 10 makes the roller 8 non-rotatable and the product B is easily fixed. In other words, the working efficiency of the product B on the work carriage can be improved.

  According to a second aspect of the present invention, the work cart according to the first aspect is configured such that the fixed plate 10 is made of an elastically deformable plate material, and the roller pressure contact surface 11 of the fixed plate 10 has a larger curvature than the outer peripheral diameter of the roller 8. It is formed in a curved surface. According to this, the fixed plate 10 on which the product B is placed and pressed against the roller 8 is elastically brought into surface contact with the outer peripheral surface of the roller 8 so as to widen the arc shape of the roller pressing surface 11. That is, it is possible to effectively prevent the roller 8 from rotating.

  According to a third aspect of the present invention, the work carriage according to the first or second aspect is characterized in that the fixing plate 10 can be attached to and detached from each of the rollers 8 provided in a plurality of rows. According to this, the arbitrary position or the arbitrary number of rollers 8 can be made non-rotatable according to the size and weight of the product B, that is, the rotation prevention of the roller 8 according to the type of the product B can be easily adjusted. it can.

  According to a fourth aspect of the present invention, there is provided a work cart according to the first aspect, wherein the push-up link 14 moves upward when the top plate fixing pedal 12 is depressed and moves downward when the top plate release pedal 13 is depressed. The top plate fixing device 4 is configured by a mechanism that is arranged in the main body 1 and presses the upper end of the push-up link 14 moved upward against the lower surface of the top plate 3 so that the top plate 3 cannot rotate. According to this, since the top plate 3 is fixed by the frictional resistance when the push-up link 14 is pressed against the lower surface of the top plate 3, the top plate 3 can be fixed without rattling, and the top plate 3 The fixed position can be set to an unlimited arbitrary position.

  According to a fifth aspect of the present invention, the work carriage according to the fourth aspect is characterized in that the friction body 15 is detachably provided at the upper end of the push-up link 14. According to this, the friction body 15 can be replaced as appropriate, and the friction body 15 can be replaced even in the case where the top plate fixing force decreases due to wear of the friction body 15 or the fixing force is insufficient due to a change in the weight of the product B. And stable top plate fixing force can be secured.

  The present invention can ensure the resumption of work such as assembling into a product with no stagnation of the worker who has continued to place and fix the work carriage on the floor surface even when the worker is away from the work place. In addition, when performing work that applies caulking force etc. to the product, it is possible to secure work application to the product from all angles without rotating the top plate, and to carry the product in and out of the work cart. It is possible to reduce the burden on the operator for loading and unloading the product by performing an easy sliding operation on the roller. Furthermore, the fixed plate makes the roller unrotatable by simply sliding the product on the roller and placing it on the fixed plate. Thus, it is possible to ensure that the product can be easily fixed, that is, it is possible to improve the work efficiency of the work on the product on the work carriage.

  1 to 7 show examples of embodiments of the present invention. As shown in FIGS. 1 and 2, the working cart of this example has a top plate 3 rotatably arranged on the top surface of a cart body 1 having casters 2, and a roller conveyor device 9 is installed on the top plate 3. Configured.

  Specifically, the bogie main body 1 is formed of a square plate member having a flange lower edge 1 a on the outer edge, and casters 2 are provided at four corners on the lower surface of the bogie main body 1. The caster 2 is formed by rotatably supporting a ring portion 2b on a support 2a suspended from the lower surface of the cart body 1. The support 2a in at least two adjacent casters 2 includes the cart 2 , So that the operator can easily change the direction when the work carriage travels on the floor surface A. Needless to say, the number of casters 2 is not limited to four, and three or more casters 2 can be used because the work cart can be stably driven. Although not particularly illustrated, the carriage main body 1 may be provided with a transfer handle for making the work carriage run with good operability. In particular, the transport handle is preferably provided so as to be housed in the cart body 1. In this case, the transport handle is accommodated in the cart body 1 so as not to interfere with the work when working on the work cart. Since the transport handle can be taken out from the cart body 1 and used when moving the work cart, the convenience of the work cart can be improved.

  Further, a bearing portion 16 made of a bearing is installed at the center of the upper surface of the cart body 1, and a rotating shaft 17 projects downward from the center of the bottom surface of the top plate 3 made of a thin flat plate material having a square shape in plan view. The top plate 3 is arranged to be horizontally rotatable with respect to the cart body 1 by pivotally supporting the rotating shaft 17 on the bearing portion 16. A plurality of receivers 18 are arranged side by side on the upper surface of the cart body 1 in a circular rail shape with the bearing portion 16 as the center. Here, the receiver 18 is a member that supports the top plate 3 disposed on the top surface of the cart body 1 and includes a ball 18 a that rolls on the bottom surface of the top plate 3, so that the horizontal rotation of the top plate 3 is smooth. The top plate 3 can be supported in a well-balanced manner at a plurality of locations (in this example, the lower surface of the outer edge portion of the top plate 3) that are spaced apart from the center. In addition, a link insertion hole 19 through which a push-up link 14 of the top plate fixing device 4 described later is inserted is drilled in the upper surface of the carriage body 1.

  In addition, the roller conveyor device 9 includes a pair of U-shaped frame members 20 arranged in parallel horizontally, and a plurality of circles extending between the opposing surfaces of the pair of beam members 20 in the longitudinal direction of the beam members 20. Columnar rollers 8 are arranged side by side and pivotally supported so as to be rotatable. The upper end position of the roller 8 is located above the upper end position of the crosspiece 20. The roller conveyor device 9 is installed on the top plate 3 by mounting and fixing a pair of crosspieces 20 on opposite side edge portions of the top plate 3. Here, according to the roller 8 of the roller conveyor device 9, the product B can be smoothly slid, and the product B can be easily carried in from the previous process and carried out to the subsequent process. Although it is possible, since the product B carried on the roller 8 is subjected to operations such as assembly, a fixing plate 10 is provided for immobilizing the product B on the roller 8. ing.

  3 and 4, the fixing plate 10 is an elastically deformable plate-like member disposed substantially horizontally above an arbitrary roller 8, and when the product B is placed on the fixing plate 10. The roller 8 is elastically deformed and pressed against the roller 8 to make the roller 8 non-rotatable, and the product B is prevented from sliding on the roller 8 to be fixed. More specifically, the fixed plate 10 is made of a material having a relatively low friction coefficient on the upper surface on which the product B is placed, and is made of a material having a relatively high friction coefficient on the lower surface pressed against the roller 8. ing. In this example, rubber or the like having a relatively high friction coefficient is attached to the lower surface of the fixed plate 10. The fixing plate 10 is formed with a guide portion 21 at one side edge portion in the direction in which the rollers 8 are arranged, and is attached to the crosspiece 20 of the roller conveyor device 9 in the central portion in the direction in which the rollers 8 are arranged. A portion 22 is formed, and the roller pressure contact surface 11 is formed on the lower surface portion of the other side edge portion in the row direction of the rollers 8. Here, the guide portion 21 is a portion that facilitates the introduction of the product B onto the fixed plate 10 and is an inclined portion that is lowered toward the edge, and the mounting portion 22 is in the direction in which the rollers 8 are arranged. The roller pressure contact surface 11 is a portion where the fixing plate 10 is pressed against the roller 8, and is formed by drilling a through hole 24 that protrudes in an orthogonal direction and allows the screw 23 to be inserted into the protruding tip. This is an arc-shaped curved surface portion having a larger curvature than the outer diameter. Note that the roller pressure contact surface 11 of this example is formed in an approximately ¼ arc shape on a part of the single plate-like fixing plate 10 in view of manufacturability. However, as shown in FIG. May be formed in an approximately 1/2 arc shape, and according to this, the area of the roller pressure contact surface 11 to be pressed against the roller 8 can be widened, and the rotation of the roller 8 can be prevented more effectively.

  The fixing plate 10 is attached to the roller conveyor device 9 by screwing the screw 23 by connecting the through hole 24 of the attachment portion 22 to the screw hole 25 drilled in the crosspiece 20 of the roller conveyor device 9. In this state, the lower end portion of the guide portion 21 is located at a position lower than the upper end position of the roller 8 in the gap between the adjacent rollers 8. That is, the product B that has slid on the roller 8 is placed on the fixed plate 10 by the guide portion 21, and the fixed plate 10 on which the product B is placed is elastically deformed downward, so that the roller pressure contact surface 11 becomes the roller 8. At this time, the roller pressure contact surface 11 is elastically deformed so as to conform to the outer periphery of the roller 8, and the entire surface of the roller pressure contact surface 11 is elastically contacted with the outer periphery of the roller 8. It is possible to make it non-rotatable. In addition, screw holes 25 are formed in the crosspieces 20 at locations corresponding to the respective rollers 8, and any position or number of rollers 8 can be arbitrarily rotated in accordance with the size and weight of the product B. An arbitrary number of fixing plates 10 can be detachably attached to the places.

  By the way, in the work cart of this example, the work cart is kept firmly fixed to the floor surface A even in a situation where the assembly parts and tools are picked up at a remote place that frequently occurs in cell production and the place is left. In addition, since the top plate 3 can be fixed at an arbitrary rotational position, the worker who has returned to the work place can resume the work without delay at an arbitrary position around the work carriage. There is an advantage that reduction in efficiency is avoided. Specifically, in the working cart of this example, the caster 2 is lifted from the floor surface A until the jack release pedal 6 is depressed from when the jack fixing pedal 5 is depressed, and the cart body 1 is placed on the floor surface A. A jack device 7 for mounting and fixing and a top plate fixing device 4 for fixing the top plate 3 to an arbitrary rotational position are provided. Details will be described below.

  As shown in FIGS. 5 and 6, the jack device 7 is provided with a jack fixing pedal 5 and a jack release pedal 6 so as to protrude outwardly at an outer edge portion of the lower portion of the cart body 1, and A grounding link 27 having a floor grounding surface 26 that is grounded by surface contact is provided at the lower end of the cart body 1 and the jack fixing pedal 5 and the jack release pedal 6 are connected to the grounding link 27 via a link mechanism. Concatenated. Here, although the link mechanism is not specifically described in detail, a general mechanical device combined with an insulator, a ratchet, or the like is used, and the floor ground contact surface 26 at the lower end of the ground link 27 is set to the lower end position of the caster 2. It can be moved up and down.

  In the jack device 7, when the operator steps on the jack fixing pedal 5, the ground link 27 is positioned below the lower end position of the caster 2 by the operation of the lever of the link mechanism as shown in FIG. As a result, the ground contact surface 26 is grounded to the floor surface A so as to lift the caster 2 from the floor surface A. Further, when the operator depresses the jack release pedal 6, the ground link 27 is immersed above the lower end position of the caster 2 by the operation of the lever of the link mechanism as shown in FIG. The floor surface 26 is separated from the floor surface A, and the caster 2 is grounded to the floor surface A instead. Here, the link mechanism is provided with a maintenance function for maintaining the state of the ground link 27. Thus, once the jack fixing pedal 5 is stepped on, the floor grounding surface 26 is kept in contact with the floor surface A until the jack release pedal 6 is stepped on. When stepped on, the state in which the caster 2 is grounded to the floor surface A is maintained until the jack fixing pedal 5 is next stepped on.

  As described above, in the working carriage of this example, once the jack fixing pedal 5 is depressed, the floor grounding surface 26 of the ground link 27 continues to be grounded to the floor A in place of the caster 2. The state where the work carriage is placed and fixed is maintained, so that the work carriage can be placed and fixed on the floor surface A even when the worker is away from the holding place. The work such as the assembly work can be resumed without delay without the re-fixing work of the carriage, and the reduction of work efficiency is avoided. Moreover, in the work trolley of this example, the floor grounding state of the caster 2 can be maintained by depressing the jack release pedal 6, and the work trolley can be moved without any delay.

  Furthermore, it is preferable to provide a plurality of floor grounding surfaces 26 with respect to the grounding link 27. For example, in FIG. 9, the lower end of the ground link 27 is divided into two forks, and two ground contact surfaces 26 are formed adjacent to the ground link 27. According to this, since the work carriage can be placed and fixed on the floor surface A at a plurality of grounding points, the fixed state of the work carriage can be made strong against the rotational moment in the horizontal direction, that is, the work carriage in the fixed state. Even if a load in the rotation direction is applied, the work cart is prevented from rotating, and the work cart in a fixed state can be stabilized.

  Further, as shown in FIG. 7, the top plate fixing device 4 is provided with a top plate fixing pedal 12 and a top plate release pedal 13 so as to protrude outwardly at an outer edge portion of the lower portion of the cart body 1, A top plate restricting portion 28 for preventing rotation of the top plate 3 is provided at the upper end of the rod-like push-up link 14, and the push-up link 14 is arranged in the cart main body 1 in a state where the push-up link 14 is inserted into the link insertion hole 19 formed in the top plate 3. And a top plate fixing pedal 12 and a top plate release pedal 13 are connected to a push-up link 14 via a link mechanism. Here, although the link mechanism is not specifically described in detail, a general mechanical device combined with a lever, a ratchet, or the like is used, and the top plate restricting portion 28 at the upper end of the push-up link 14 is movable up and down. Yes. In particular, in this example, a plurality of link fitting holes 29 are formed side by side in a circular rail shape centered on the rotation shaft 17 of the top plate 3, and each link fitting hole 29 is rotated by horizontally rotating the top plate 3. The top plate restricting portion 28 of the push-up link 14 includes a projecting shaft portion 30 that fits into the link fitting hole 29 of the top plate 3. .

  When the operator steps on the top plate fixing pedal 12, the top plate fixing device 4 is operated by the lever of the link mechanism as shown in FIG. Is fitted into the link fitting hole 29 of the top plate 3 from below, and as a result, the top plate 3 is fixed at an arbitrary rotational position. When the operator steps on the top plate release pedal 13, the top plate restricting portion 28 of the push-up link 14 is linked to the top plate 3 by the operation of the lever of the link mechanism as shown in FIG. As a result, the top 3 is allowed to rotate horizontally. Here, the link mechanism is provided with a maintenance function for maintaining the state of the push-up link 14. Thus, once the top plate fixing pedal 12 is stepped on, the state where the top plate restricting portion 28 is fitted in the link fitting hole 29 is maintained until the top plate release pedal 13 is stepped on. When the top plate release pedal 13 is stepped on, the state that the top plate 3 is horizontally rotatable is maintained until the next top plate fixing pedal 12 is stepped on.

  As described above, in the working carriage of this example, when the top plate fixing pedal 12 is depressed, the top plate restricting portion 28 is fitted into the link fitting hole 29 and the top plate 3 is fixed at an arbitrary rotational position. The state can be maintained, and it is of course possible to apply the work to the product B from all angles without causing the top plate 3 to rotate when a work such as caulking is applied to the product B. In combination with the fixing of the work carriage to the floor surface A by the jack device 7, it is possible to resume the work of the worker who has returned to the place without delay, and the work efficiency can be improved. -ing

  Note that the jack fixing pedal 5 and the jack release pedal 6, the top plate fixing pedal 12, and the top plate release pedal 13 described above are also preferably disposed at a plurality of locations on the carriage main body 1. In particular, it is preferable to arrange each pedal corresponding to the four sides of the cart body 1 having a rectangular shape in plan view. For example, in the work cart of FIG. 10, each pedal is arranged corresponding to two adjacent sides of the cart body 1. According to this, the operator can perform the operation of fixing / releasing the work cart to the floor surface A and fixing / releasing the top plate 3 to the cart body 1 from a plurality of standing positions with respect to the work cart. The convenience can be improved.

  By the way, the top plate fixing device 4 is a device for fixing the top plate 3 to an arbitrary rotational position by a frictional force when the upper end of the raised push-up link 14 is pushed against the lower surface of the top plate 3 as shown in FIG. It is also preferable to adopt. That is, in this example, the top plate 3 does not have the previous link fitting hole 29, and the top plate regulating portion 28 of the push-up link 14 secures the contact resistance with the top plate 3 instead of the protruding shaft portion 30. It is comprised by the friction body 15 which carries out. In the top plate fixing device 4 of the previous example, in order to insert and fit the projecting shaft portion 30 which is the top plate regulating portion 28 into the link fitting hole 29 of the top plate 3, it is between the projecting shaft portion 30 and the link fitting hole 29. However, a slight clearance is required and the fixed top plate 3 may be slightly rattled by this clearance, but the top plate fixing device 4 of this example completely eliminates the slight backlash of the fixed top plate 3. It has the advantage that it can be eliminated. Moreover, in the top plate fixing device 4 of the previous example, the fixing position of the top plate 3 is limited to the drilling position of the link fitting hole 29, but in the top plate fixing device 4 of this example, the fixing position of the top plate 3 is set to unlimited. Has the advantage of being able to.

  Furthermore, it is preferable that the friction body 15 is detachably attachable to the push-up link 14 as shown in FIG. That is, the friction body 15 is expected to be deteriorated due to wear due to repeated contact with the lower surface of the top plate 3, but the deteriorated friction body can be attached to the push-up link 14 in a detachable manner. 15 can be replaced with a new friction body 15 as appropriate. In this example, the upper end of the push-up link 14 and the friction body 15 are freely engaged and disengaged by an engagement structure of horizontal dovetails 31 (male grooves 31a and female grooves 31b). As a result, when the top plate fixing force is reduced due to wear of the friction body 15 or the fixing force is insufficient due to a change in the weight of the product B, the stable top plate fixing force can be obtained by replacing the friction body 15 as described above. It can be secured.

It is a disassembled perspective view of the work trolley | bogie of the example of embodiment of this invention. It is a schematic side view of a work trolley same as the above. It is a disassembled perspective view of the principal part of a work trolley same as the above. It is operation | movement explanatory drawing of a fixed body same as the above, (a) is a stationary plate in which a product is not in a mounting state, (b) is a stationary plate in which a product is in a mounting state. It is operation | movement explanatory drawing of a jack apparatus same as the above, (a) is a jack apparatus when a work trolley is not in a fixed state, (b) is a jack apparatus when a work trolley is in a fixed state. It is a principal part perspective view of a working trolley same as the above. It is operation | movement explanatory drawing of a top plate fixing device same as the above, (a) is a top plate fixing device when a top plate is not in a fixed state, (b) is a top plate fixing device when a top plate is in a fixed state. It is. It is a disassembled perspective view of the principal part of the work trolley | bogie of the other examples of embodiment of this invention. It is a principal part perspective view of the work trolley | bogie of the further another example of embodiment of this invention. It is a perspective view of the work trolley | bogie of the further another example of embodiment of this invention. It is operation | movement explanatory drawing of the top plate fixing device in the work trolley | bogie of the further another example of embodiment of this invention, (a) is a top plate fixing device when a top plate is not in a fixed state, (b) is a top plate fixing device. It is a top plate fixing device when the plate is in a fixed state. It is a disassembled perspective view of the principal part of the top plate fixing apparatus of the further another example of embodiment of this invention. It is a perspective view of the work trolley | bogie of the example of background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bogie body 2 Caster 3 Top plate 4 Top plate fixing device 5 Jack fixed pedal 6 Jack release pedal 7 Jack device 8 Roller 9 Roller conveyor device 10 Fixed plate 11 Roller pressure contact surface 12 Top plate fixed pedal 13 Top plate release Pedal 14 Push-up link

Claims (5)

  A top plate is mounted on the top surface of the cart body having casters so that it can rotate horizontally, and a top plate fixing device for fixing the rotating top plate to an arbitrary rotation position is provided on the cart body. A jack device is installed on the cart body to keep the cart body on the floor surface by lifting the casters from the floor until the release pedal is depressed, and a roller conveyor device in which a number of rotatable rollers are arranged in a row on the top plate. A working carriage characterized in that a fixed plate is attached to the roller conveyor device so as to press the roller and make the roller unrotatable when the product is placed.   2. The work carriage according to claim 1, wherein the fixed plate is made of an elastically deformable plate material, and the roller pressure contact surface of the fixed plate is formed into a curved surface having a larger curvature than the outer peripheral diameter of the roller.   The work cart according to claim 1 or 2, wherein a fixing plate is detachably attached to each of the plurality of rows of rollers.   A push-up link that moves upward when the top plate fixing pedal is depressed and moves downward when the top plate release pedal is depressed is disposed on the carriage body, and the upper end of the upward link that has moved upward is placed on the bottom surface of the top plate. 2. The work cart according to claim 1, wherein the top plate fixing device is configured by a mechanism that presses the top plate so that the top plate cannot rotate.   The work cart according to claim 4, wherein a friction body is detachably provided at an upper end of the push-up link.

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