JP6222865B1 - Transport cart - Google Patents

Abstract

Provided is a conveyance carriage capable of preventing workpiece vibration during conveyance and smoothly performing workpiece transfer. A conveying cart 100 receives a workpiece W from a first device and conveys the received workpiece W to a second device. A conveying base 10 and four pieces provided on the conveying base 10 are provided. The wheel 20 and the workpiece mounting table 30 disposed on the conveyance base 10 are provided. The transport carriage 100 further includes a spring 40 for preventing damage to the workpiece W due to vibration of the workpiece W being transported, and the workpiece mounting table 30 when the workpiece W is transferred to the second device. A clamping mechanism 50 is provided for clamping to the thickness. [Selection] Figure 1

Description

  The present invention relates to a transport carriage that receives a workpiece from a first device and transports the workpiece to a second device.

  For example, in an automobile production factory or the like, a transport cart that transports workpieces between devices is used. The transport cart receives a workpiece such as an automobile part from the first device installed in the production factory, etc., and is placed on the workpiece mounting table, up to the second device installed in another location such as the production factory. The work is conveyed and transferred to the second device. The first and second devices are, for example, automobile parts assembling devices and processing devices.

JP, 2014-213409, A

  In order to prevent damage or the like due to vibration of the workpiece during conveyance, for example, it is conceivable to attach a vibration absorbing spring to the wheel of the conveyance carriage.

  However, when a workpiece is received from the first apparatus and placed on the workpiece mounting table, the spring contracts due to the load of the workpiece, and accordingly the height of the workpiece mounting table is lowered accordingly. When the workpiece is an automobile part having a large load, for example, several hundred kilograms, the amount of contraction of the spring must be considerably large. Then, since the height of the workpiece mounting table becomes lower due to the workpiece delivery height defined by the second device, there is a problem that it becomes difficult to deliver the workpiece to the second device.

The conveyance cart of the present invention is made in view of the above-mentioned problem. In the conveyance cart that receives the workpiece (W) from the first device and conveys the received workpiece (W) to the second device, A transport base (10), wheels (20) provided on the transport base (10), a workpiece mounting base (30) disposed on the transport base (10), a transport base (10), A spring (40) disposed between the workpiece mounting tables (30) and supporting the workpiece mounting table (30) and a workpiece mounting table (30) on which the workpiece (W) is mounted are defined by the second device. A clamp mechanism (50) that pushes up to and holds the workpiece transfer height,
The clamp mechanism (50) includes a slide mechanism (53) that slides the slide arm (52) in the horizontal direction according to the rotation of the operation lever (51), a pair of rotating arms (56, 56), and a slide arm. A rotation mechanism (K1) that rotates the pair of rotation arms (56, 56) according to the slide of (52), and the pair of rotation arms (56, 56) is rotated to rotate the workpiece mounting table (30). It is configured to abut on the lower surface side and push up the workpiece mounting table (30),
The rotation mechanism (K1) includes a connecting rod (54) rotatably engaged with the tip of the slide arm (52), and a movable shaft (55) connected to the tip of the connecting rod (54). The pair of rotating arms (56, 56) is configured to be rotatably engaged with both ends of the movable shaft (55) and to be rotatable about the support shaft (57) .

  According to the transport carriage of the present invention, the workpiece can be prevented from being vibrated by the vibration-absorbing spring during transport, and when the workpiece is transferred to the second device, the workpiece mounting table is provided by the clamp mechanism. Is pushed up to the workpiece transfer height defined by the second device and held at that height, it is possible to smoothly transfer the workpiece.

It is a schematic block diagram of the conveyance trolley | bogie in embodiment of this invention. It is a front view of the conveyance trolley in the embodiment of the present invention. It is a right view of the conveyance trolley in the embodiment of the present invention. It is a top view of the conveyance trolley in the embodiment of the present invention. It is a figure which shows the detail of the clamp mechanism of the conveyance trolley | bogie in embodiment of this invention. It is a figure which shows the detail of the slide mechanism of the conveyance trolley | bogie in embodiment of this invention.

  Hereinafter, a transport carriage according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. First, a schematic configuration of the transport cart 100 will be described with reference to FIG. The transport carriage 100 receives a work W from a first device (not shown) and transports the received work W to a second device (not shown). The transport base 10 and the transport base 10 The four wheels 20 provided and the workpiece mounting table 30 disposed on the transport base 10 are provided.

  The transport carriage 100 further includes a spring 40 for preventing damage to the workpiece W due to vibration of the workpiece W being transported, and the workpiece mounting table 30 when the workpiece W is transferred to the second device. A clamping mechanism 50 is provided for clamping to the thickness.

  The spring 40 is formed of, for example, a coil spring, and is disposed between the conveyance base 10 and the work mounting table 30, and is provided at four corners of the conveyance base 10 and the work mounting table 30 so as to support the work mounting table 30. Each is arranged. Although the specific configuration of the clamp mechanism 50 will be described later, the workpiece mounting table 30 on which the workpiece W is mounted is pushed up to the workpiece transfer height defined by the second device against the load, and the height is increased. Is configured to hold. As described above, the first and second apparatuses are, for example, an automobile parts assembling apparatus and a processing apparatus.

  Next, the operation of the transport carriage 100 will be described based on the schematic diagram of FIG. First, as shown in FIG. 1A, in the free state in which the workpiece W is not stacked, the height of the upper surface of the workpiece mounting table 30 is h1. As shown in FIG. 1B, when the workpiece W is received from the first device, the spring 40 contracts due to the load, and the height of the upper surface of the workpiece mounting table 30 becomes as low as h2 (h2 <h1).

  In this state, the transport cart 100 is caused to travel. When the transport carriage 100 arrives in front of the second device, as shown in FIG. 1 (c), the workpiece mounting table 30 is pushed up by operating the clamp mechanism 50, and the workpiece defined by the second device. It is clamped to the delivery height h3 (h3> h2). For example, h3 is the same as the height h1 in the free state, although it depends on the definition on the second device side.

  Next, details of the clamp mechanism 50 will be described with reference to FIGS. 2 is a front view of the transport carriage 100, FIG. 3 is a right side view thereof, and FIG. 4 is a plan view thereof. FIG. 5 is a view showing the operation of the clamp mechanism 50, FIG. 5 (a) is a front view thereof, and FIG. 5 (b) is a right side view thereof.

  The workpiece mounting table 30 of the transport cart 100 includes a frame body 31 and a large number of transport rollers 32 attached to the inside of the frame body 31. In FIG. 4, the conveyance roller 32 is not shown in order to make the clamp mechanism 50 easy to see.

  The clamp mechanism 50 includes a slide mechanism 53 that slides the slide arm 52 in the horizontal direction according to the rotation of the operation lever 51, a pair of rotary arms 56, 56, and a pair of rotary arms 56 according to the slide of the slide arm 52. , And a rotation mechanism K1 that rotates the pair of rotary arms 56 and 56 so as to contact the lower surface side of the workpiece mounting table 30 and push up the workpiece mounting table 30.

  Although details of the slide mechanism 53 will be described later, when the operation lever 51 is rotated from its bottom dead center in the A direction (counterclockwise direction) in FIG. The arm 52 is configured to advance in the horizontal direction (the left direction in FIGS. 2, 4 and 5A).

  Details of the rotation mechanism K1 will be described. At the tip of the slide arm 52, a connecting rod 54 is engaged with the slide arm 52 so as to be rotatable in a vertical plane around the fulcrum S2. A movable shaft 55 is connected to the distal end of the connecting rod 54 so as to extend at right angles to the connecting rod 54 in the left-right direction. A pair of rotating arms 56 and 56 are engaged with both ends of the movable shaft 55. These rotary arms 56 and 56 can rotate in a vertical plane with respect to the movable shaft 55 around the fulcrum S3, and can rotate around a support shaft 57 provided substantially in the center in the longitudinal direction. It is configured.

  Next, the operation of the clamp mechanism 50 will be described. When the slide arm 52 slides (advances) in the horizontal direction (leftward in FIGS. 2, 4 and 5A), the connecting rod 54 rotates slightly counterclockwise accordingly, and a pair of rotation arms 56 and 56 rotate clockwise, abut on the lower surface side of the workpiece mounting table 30, and push up the workpiece mounting table 30 (see particularly FIG. 5A).

  In this case, when the operator rotates the operation lever 51 from the bottom dead center in the A direction (counterclockwise direction) by about 185 degrees, the pair of rotary arms 56 and 56 slightly rotate over from the vertical position, and is conveyed. A toggle clamp works by abutting against a toggle adjustment stopper 58 fixed to the base 10 and restricting its rotation. Thereby, the workpiece mounting table 30 is held at a specified height.

  On the other hand, when the operation lever 51 is returned to the bottom dead center position, the slide arm 52 slides (retreats) in the horizontal direction (rightward in FIGS. 2, 4 and 5A), and the pair of rotary arms 56, The toggle clamp is released by rotating 56 counterclockwise and escaping below the workpiece mounting table 30.

  5A and 5B, the movements of the operation lever 51, the slide arm 52, the rotation arms 56 and 56, the work mounting table 30, the conveyance roller 32, and the like are overlapped in one figure. It is drawn. Further, the right side of FIG. 5B shows a state when the workpiece mounting table 30 is pushed down by the load of the workpiece W, and the left side shows a state where the workpiece mounting table 30 is pushed up by the toggle clamp.

  Thus, according to the clamp mechanism 50, since the toggle clamp is used, the workpiece mounting table 30 loaded with the workpiece W having a large load of several hundred kilograms, for example, can be pushed up to a specified height and held. .

  Also, cam followers 59 are provided at the tips of the pair of rotating arms 56, respectively, and the cam followers 59 abut on the lower surface side of the workpiece mounting table 30 according to the rotation of the pair of rotating arms 56, 56, so Contact friction with the mounting table 30 can be reduced. Furthermore, the shock absorbing pad 60 can be provided on the contact surface of the workpiece mounting table 30 to reduce the impact when the rotating arm 56 contacts.

  The rotation mechanism K1 may adopt another configuration as long as it converts the linear motion (slide motion) of the slide arm 52 into the rotational motion of the pair of rotation arms 56 and 56. For example, the tip of the connecting rod 54 is connected to a rotating shaft (not shown), and the rotating shaft is configured to rotate around its support shaft by sliding the connecting rod 54. Then, a pair of rotating arms 56 and 56 are attached to both ends of the rotating shaft.

  Next, details of the slide mechanism 53 will be described with reference to FIG. 6A is a front view of the slide mechanism 53, and FIG. 6B is a plan view thereof. In FIG. 6, the movement of the operation lever 51, the slide arm 52, and the like are drawn in a single figure.

  The slide mechanism 53 includes a base bracket 61, an intermediate bracket 62, a rotating bracket 63, and a rod-shaped operation lever 51. The base bracket 61 includes a bottom plate 61a fixed to the transport base 10 and a pair of side plates 61b and 61b erected on the bottom plate 61a, and a slit space between the pair of side plates 61b and 61b is a long plate shape. This is a guide path for the slide arm 52.

  The intermediate bracket 62 includes a pair of side plates 62a and 62a and a top plate 62b connected so as to cover only a part of the upper surfaces of the pair of side plates 62a and 62a. The pair of side plates 62 a, 62 a is circumscribed on the pair of side plates 61 b, 61 b of the base bracket 61 and is engaged so as to be rotatable around a fulcrum S 4 provided at the upper right end of the base bracket 61. Moreover, in order to prevent interference with the rotation bracket 63, an open portion 62c that is opened without being covered by the top plate 6b is formed on a part of the upper surface of the side plates 62b and 62b.

  The rotating bracket 63 includes a pair of side plates 63a and 63a and a top plate 63b connected so as to cover the upper surfaces of the pair of side plates 63a and 63a. The pair of side plates 63 a and 63 a is inscribed in the pair of side plates 62 a and 62 a of the intermediate bracket 62. The rotating bracket 63 is configured to be rotatable around a fulcrum S1 provided at the lower right end of the intermediate bracket 62. The right end of the slide arm 52 is engaged with a fulcrum S5 provided at the right end of the rotary bracket 63. The operation lever 51 is connected to the top plate 63b.

  The slide arm 52 is provided with two lateral holes 52a and 52a extending in the longitudinal direction. The base bracket 61 is provided with guide pins 61c and 61d penetrating through the horizontal holes 52a and 52b, respectively, whereby the slide stroke of the slide arm 52 is determined.

  When the operation lever 51 is at the bottom dead center, the guide pins 61c and 61d are in contact with the left ends of the horizontal holes 52a and 52b of the slide arm 52. Then, when the operator rotates the operation lever 51 in the A direction (counterclockwise direction) from the bottom dead center, the rotating bracket 63 also rotates in the A direction, while the intermediate bracket 62 rotates in the direction opposite to the A direction. Rotate to. As a result, the slide arm 52 slides (advances) from the base bracket 61 in the left horizontal direction.

  When the operation lever 51 is further rotated in the A direction, the intermediate bracket 62 starts to rotate in the A direction, and the rotating bracket 63 passes through the opening 62c of the intermediate bracket 62 and reaches the top dead center. At this time, the guide pins 61 c and 61 d come into contact with the right ends of the horizontal holes 52 a and 52 b of the slide arm 52. Thereby, the slide (advance) of the slide arm 52 is stopped.

DESCRIPTION OF SYMBOLS 10 Conveyance base 20 Wheel 30 Workpiece mounting base 40 Spring 50 Clamp mechanism 51 Operation lever 52 Slide arm 53 Slide mechanism 54 Connecting rod 55 Movable shaft 56 Rotating arm 57 Support shaft 58 Toggle adjustment stopper 59 Cam follower 60 Buffer pad 61 Base bracket 62 Intermediate Bracket 63 Rotating bracket

Claims (3)

In the transport carriage that receives the workpiece (W) from the first device and transports the received workpiece (W) to the second device,
A transport base (10);
Wheels (20) provided on the transport base (10);
A workpiece mounting table (30) disposed on the transport base (10);
A spring (40) disposed between the transport base (10) and the work mounting base (30) and supporting the work mounting base (30);
A clamp mechanism (50) that pushes up and holds the workpiece mounting table (30) on which the workpiece (W) is mounted to a workpiece transfer height defined by the second device;
The clamp mechanism (50) includes a slide mechanism (53) that slides the slide arm (52) in the horizontal direction according to the rotation of the operation lever (51), a pair of rotating arms (56, 56), and a slide arm. A rotation mechanism (K1) that rotates the pair of rotation arms (56, 56) according to the slide of (52), and the pair of rotation arms (56, 56) is rotated to rotate the workpiece mounting table (30). It is configured to abut on the lower surface side and push up the workpiece mounting table (30),
The rotation mechanism (K1) includes a connecting rod (54) rotatably engaged with the tip of the slide arm (52), and a movable shaft (55) connected to the tip of the connecting rod (54). The pair of rotating arms (56, 56) is rotatably engaged with both ends of the movable shaft (55), and is configured to be rotatable about the support shaft (57). . The conveyance cart according to claim 1 , further comprising a toggle adjustment stopper (58) for regulating a rotation angle of the rotary arm (56). The transport carriage according to claim 1 or 2 , wherein a cam follower (59) is provided at a tip of the rotating arm (56).

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