Carrier for conveyor

Abstract

To mitigate a large impact acting on a carrier when used with a power-and-free type conveyor, and allow shared use with both a power-and-free type conveyor and a friction roller type conveyor.SOLUTION: A carrier for a conveyor comprises a front end trolley 1, which is a free trolley FT with an engaging dog C that engages a traction dog B of a power chain type drive device PC, and a connecting rod 11 located between the front end trolley 1 and a conveyance support section H. The connecting rod 11 comprises a front dividing body 5 and a rear dividing body 6. The front dividing body 5 and the rear dividing body 6 are slidably supported relative to each other in a front-back direction by slide support means. A shock absorber is installed between the front dividing body 5 and the rear dividing body 6 in the front-back direction. A side surface of the connecting rod 11 serves as a driving surface E against which a friction roller of a friction roller type drive device presses.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a conveyor carrier that moves along a conveying path defined by guide rails. [Background technology]

[0002] The first problem with power and free conveyors is that when a carrier supporting an object is stopped at a fixed position, and when subsequent carriers are stopped in sequence after a stopped carrier in a storage line, the carrier is subjected to large impacts and noise is generated (see, for example, Patent Document 1).

[0003] In the power and free type conveyor of Patent Document 1, in order to solve the first problem, an air damper (39) is incorporated in the load bar (30) that connects the traction trolley (32) in the carrier. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 2541673 Summary of the Invention [Problem to be solved by the invention]

[0005] In addition to the first problem, power and free type conveyors use a power chain drive device, which generates noise when the power chain is driven, and also has a second problem in that the lubricating oil, which is essential for suppressing wear, contaminates the transported objects and the area around the conveyor.

[0006] Since the power and free type conveyor has the first and second problems, there is a need to gradually replace the power and free type conveyor with a friction roller type conveyor that can solve the problems. In order to meet this need, it is necessary to make the carrier compatible with both the power and free type conveyor and the friction roller type conveyor. To achieve this, it is necessary to configure the carrier so that it can be driven by both the power chain type drive device and the friction roller type drive device.

[0007] Therefore, the carrier needs to have a drive surface against which the friction roller can be pressed, and when the carrier is used in a power-and-free type conveyor, the first problem needs to be solved.

[0008] An object of the present invention is to provide a carrier that can be used in both power and free type conveyors and friction roller type conveyors while mitigating the large impact that acts on the carrier when used in a power and free type conveyor. [Means for solving the problem]

[0009] A conveyor carrier according to a first aspect of the present invention is a conveyor carrier having an object support part that supports an object to be transported and moving along a transport path formed by a guide rail. The conveyor carrier is provided with a front end trolley that has an engagement dog that engages with a traction dog of a power chain type drive device and is a free trolley supported and guided by the guide rail, and a connecting rod located between the front end trolley and the transport support part. The connecting rod is composed of a front divided body and a rear divided body. The front divided body and the rear divided body are supported by a slide support means so as to be relatively slidable in the front-rear direction. A front-rear shock absorber is installed between the front divided body and the rear divided body. A side surface of the connecting rod serves as a drive surface against which a friction roller of a friction roller type drive device is pressed.

[0010] According to the configuration of the conveyor carrier of the first aspect, the front end trolley, which is a free trolley, has an engagement dog that engages with the traction dog of a power chain type drive device, so that the carrier can be driven by the power chain type drive device. Since the side surface of the connecting rod is the drive surface with which the friction roller of the friction roller type drive device is pressed, the carrier can be driven by the friction roller type drive device. Therefore, the carrier can be shared by both the power and free type conveyor and the friction roller type conveyor.

[0011] According to the configuration of the conveyor carrier of the first aspect, the connecting rod is composed of a front divided body and a rear divided body, the front divided body and the rear divided body are supported by a slide support means so as to be relatively slidable in the front-rear direction, and a shock absorber in the front-rear direction is installed between the front divided body and the rear divided body. Therefore, the connecting rod has an extension function and a damping force is generated by the shock absorber, so that it is possible to reduce a large impact acting on the carrier when the carrier is used in a power-and-free type conveyor and to suppress the generation of noise. Furthermore, since the front divided body and the rear divided body are supported by the slide support means so as to be relatively slidable in the front-rear direction, even if the shock absorber is damaged during the transportation of the carrier, the extension function of the connecting rod can be maintained, so there is no need to stop the transportation of the carrier.

[0012] A conveyor carrier according to a second aspect of the present invention is the conveyor carrier according to the first aspect, wherein the shock absorber is built into the connecting rod.

[0013] According to the configuration of the conveyor carrier of the second aspect, since the shock absorber is built into the connecting rod, the axis connecting the front and rear mounting parts of the connecting rod can be brought close to the central axis of the shock absorber, or the axis and the central axis can be made to overlap with each other. Therefore, the bending moment acting on the shock absorber is reduced, and the shock absorber can directly and efficiently absorb the impact.

[0014] In addition, according to the configuration of the conveyor carrier according to the second aspect, since the shock absorber is built into the connecting rod, even if oil leaks from the shock absorber, oil can be prevented from leaking from the connecting rod, and therefore adhesion of oil to the friction roller can be avoided. Therefore, the coefficient of friction between the carrier and the friction roller does not become small, and the carrier can be reliably transported by the friction roller type drive device.

[0015] A conveyor carrier according to a third aspect of the present invention is a conveyor carrier according to the first aspect, wherein a portion of a side surface of the connecting rod whose shape changes when the front split body and the rear split body slide relatively in the fore-and-aft direction is stepped to form a first front-and-aft opposing surface extending approximately downward from an upper end, an upper-and-lower opposing surface extending in the fore-and-aft direction from a lower end of the first front-and-aft opposing surface, and a second front-and-aft opposing surface extending approximately downward from an end of the upper-and-lower opposing surface, and when the friction roller presses against the drive surface on the side surface of the connecting rod, the friction roller presses against one, then both, and then the other of the front split body and the rear split body in that order.

[0016] According to the configuration of the conveyor carrier of the third aspect, the portion of the side surface of the connecting rod that changes shape when the front divided body and the rear divided body slide relatively in the front-rear direction is made to have the stepped shape, and when the friction rollers press against the drive surfaces of the side surfaces of the connecting rod, the friction rollers press against one of the front divided body and the rear divided body in the order of one, both, and the other. Therefore, even if the extension stroke of the connecting rod is lengthened, the drive surface against which the friction rollers press can be secured.

[0017] A conveyor carrier according to a fourth aspect of the present invention is the conveyor carrier according to the first aspect, wherein the slide support means is configured such that a guide pin provided at the front and rear of one of the front and rear division bodies is inserted into a long hole in the front-to-rear direction provided at the front and rear of the other of the front and rear division bodies, the slide support means is installed above or below the drive surface with which the friction roller is pressed, and a slide stroke of the slide support means is smaller than the stroke of the shock absorber.

[0018] According to the configuration of the conveyor carrier of the fourth aspect, the slide support means for supporting the front and rear division bodies so that they can slide relatively in the front-rear direction has guide pins provided at the front and rear of one of the front and rear division bodies inserted into long holes in the front-rear direction provided at the front and rear of the other of the front and rear division bodies, so that the structure of the slide support means is simplified and the sliding action is reliable. Also, since the slide support means is installed above or below the drive surface with which the friction rollers of the friction roller drive device are in pressure contact, a continuous drive surface without irregularities can be ensured. Furthermore, since the slide stroke of the slide support means is smaller than the stroke of the shock absorber, damage to the shock absorber can be prevented.

[0019] A conveyor carrier according to a fifth aspect of the present invention is the conveyor carrier according to the fourth aspect, wherein the guide pin and the long hole are provided at two locations so as to sandwich the shock absorber from the front and rear.

[0020] According to the configuration of the conveyor carrier relating to the fifth aspect, the guide pin and the long hole constituting the slide support means are provided at two locations sandwiching the shock absorber installed between the front division body and the rear division body from the front and rear, thereby making it possible to disperse the impact received at both ends of the slide stroke of the slide support means.

[0021] A conveyor carrier according to a sixth aspect of the present invention is the conveyor carrier according to the fifth aspect, wherein, where the distance between the front and rear guide pins is L1 and the distance between the front and rear mounting holes of the connecting rod when the connecting rod is most retracted is L2, L1 > (L2 / 2).

[0022] According to the configuration of the conveyor carrier relating to the sixth aspect, the distance between the front and rear guide pins and the distance between the front and rear long holes are large, so that the bending force acting on the slide support means is mitigated, thereby making the extension and retraction movement of the connecting rod smoother.

[0023] A conveyor carrier according to a seventh aspect of the present invention is the conveyor carrier according to any one of the first to sixth aspects, wherein one end of the shock absorber is attached to a cover body provided on an upper portion of one of the front division body and the rear division body.

[0024] According to the configuration of the conveyor carrier of the seventh aspect, installation of the shock absorber is completed by attaching the cover body to the upper part of one of the front and rear division bodies with one end of the shock absorber attached to the cover body, and one end of the shock absorber is exposed by removing the cover body, making it easy to install and replace the shock absorber. Effect of the Invention

[0025] As described above, the conveyor carrier according to the present invention can be used in both power and free type conveyors and friction roller type conveyors while mitigating the large impacts that act on the carrier when used in a power and free type conveyor. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a front view showing an example in which a conveyor carrier according to an embodiment of the present invention is used in an overhead conveyor. [Diagram 2] 1 is a front view showing an example in which a conveyor carrier according to an embodiment of the present invention is used in a floor conveyor. [Diagram 3] FIG. 2 is a perspective view of a first connecting rod in the conveyor carrier according to the embodiment of the present invention, showing the first connecting rod in a fully extended state. [Figure 4] FIG. 4 is a perspective view of the first connecting rod, showing the first connecting rod in a most contracted state. [Diagram 5] 4 is a vertical cross-sectional front view of the first connecting rod, showing the first connecting rod in a fully extended state. FIG. [Figure 6] FIG. 4 is a vertical sectional front view of the first connecting rod, showing the first connecting rod in its most contracted state. [Figure 7] FIG. 4 is an exploded perspective view of the first connecting rod. [Figure 8] 1A and 1B are enlarged front views of essential parts showing the state in which the first connecting rod is driven by a friction roller type drive device, in which (a) shows a state in which the friction roller is in pressure contact only with the front divided body, (b) shows a state in which the friction roller is in pressure contact only with the front divided body and the rear divided body, and (c) shows a state in which the friction roller is in pressure contact only with the rear divided body. [Figure 9] 10 is a vertical sectional front view showing a modified example of the shock absorber used in the first connecting rod, showing the first connecting rod in a fully extended state. FIG. [Figure 10] FIG. 11 is a vertical sectional front view showing the modified example, illustrating a state in which the first connecting rod is fully contracted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0028] In this specification, along the conveying direction of the conveyor carrier (see arrow F in Figures 1 and 2), the front side (downstream side) is referred to as the front, the rear side (upstream side) is referred to as the rear, left and right are referred to as facing forward, and a view from the left is referred to as a front view.

[0029] [Conveyor carrier] An example of a conveyor carrier A according to an embodiment of the present invention used in an overhead conveyor is shown in Fig. 1, and an example of a conveyor carrier A used in a floor conveyor is shown in Fig. 2. The carrier A has an object support part H for supporting an object W, and moves along a conveying path formed by a guide rail GR.

[0030] 1 and 2 includes a load trolley LT that supports an article support portion H, and a free trolley FT that does not support the article support portion H, and the load trolley LT and the free trolley FT are supported and guided by a guide rail GR.

[0031] Carrier A, for example, has a front end trolley 1 which is a free trolley FT, a front load trolley 2 and a rear load trolley 3 which are load trolleys LT, and a rear end trolley 4 which is also a free trolley FT.

[0032] The front end trolley 1 and the front load trolley 2 are connected via a first connecting rod 11, the front load trolley 2 and the rear load trolley 3 are connected via a second connecting rod 12, and the rear load trolley 3 and the rear end trolley 4 are connected via a third connecting rod 13.

[0033] The front end trolley 1 has an engagement dog C which engages with a traction dog B of the power chain drive device PC, so that the carrier A can be driven by the power chain drive device PC.

[0034] The front end trolley 1, the first connecting rod 11, the front load trolley 2, the second connecting rod 12, the rear load trolley 3, the third connecting rod 13, and the rear end trolley 4 have sides that become the driving surfaces E against which the friction rollers D (see FIG. 8) of the friction roller type drive device FR press. In other words, the side surfaces of the carrier A over the entire length in the front-to-rear direction are the driving surfaces E against which the friction rollers D of the friction roller type drive device FR press. This allows the carrier A to be driven by the friction roller type drive device FR.

[0035] Therefore, carrier A can be used in common with both power and free conveyors and friction roller conveyors.

[0036] It is not necessary that the side surface over the entire length of the carrier A in the front-rear direction be the drive surface E. However, by making the side surface over the entire length of the carrier A in the front-rear direction the drive surface E, the intervals at which the friction rollers D are installed can be increased, and therefore the number of friction rollers D can be reduced, thereby reducing the cost of the friction roller type drive device FR.

[0037] [First connecting rod] As shown in Figures 1 and 2, the first connecting rod 11 is composed of a front divisional body 5 and a rear divisional body 6. The front divisional body 5 and the rear divisional body 6 are supported by a slide support means S shown in Figures 3 to 7 so as to be relatively slidable in the front-rear direction. This allows the first connecting rod 11 to expand and contract between a most extended state shown in Figures 3 and 5 and a most contracted state shown in Figures 4 and 6.

[0038] With reference to an exploded perspective view of FIG. 7, a structure of a first connecting rod 11 according to this embodiment, which is an example of a connecting rod constituting a conveyor carrier according to the present invention, will be described.

[0039] After the bolt R1 is inserted through the through hole 14a on the left side of the support U hanging down from the cover body 10, the through hole of the end 7A of the shock absorber 7, and the through hole 14a on the right side of the support U, a nut T1 is screwed onto the tip of the bolt R1. This attaches the end 7A of the shock absorber 7 to the cover body 10.

[0040] After the bolt R2 is inserted through the left through-hole 14b of the support body V of the rear split body 6, the through-hole of the end portion 7B of the shock absorber 7, and the right through-hole 14b of the support body V, a nut T2 is screwed onto the tip of the bolt R2. This attaches the end portion 7B of the shock absorber 7 to the rear split body 6.

[0041] A cylindrical guide pin P1 is inserted through a long hole Q1 in the front-rear direction of the rear split body 6, and a cylindrical guide pin P2 is inserted through a long hole Q2 in the front-rear direction of the rear split body 6. A bolt R3 is inserted through the through hole 15a on the left side of the front split body 5, the center hole of the guide pin P1, and the through hole 15a on the right side of the front split body 5, and then a nut T3 is screwed onto the tip of the bolt R3. A bolt R4 is inserted through the through hole 15b on the left side of the front split body 5, the center hole of the guide pin P2, and the through hole 15b on the right side of the front split body 5, and then a nut T4 is screwed onto the tip of the bolt R4. As a result, the front split body 5 and the rear split body 6 are supported so that they can slide relatively in the front-rear direction.

[0042] The left bolt R5 shown in Figures 3 and 4 is inserted into the left through-hole 16b of the front connector 5 shown in Figure 7 and the left through-hole 16a of the cover body 10, and then the left nut T5 shown in Figures 3 and 4 is screwed onto the tip of the bolt R5. The right bolt R5 shown in Figures 3 and 4 is inserted into the right through-hole 16b of the front connector 5 shown in Figure 7 and the right through-hole 16a of the cover body 10, and then the right nut T5 shown in Figures 3 and 4 is screwed onto the tip of the bolt R5. As a result, the cover body 10 is attached to the front connector 5.

[0043] In this manner, one end 7A of the shock absorber 7 is attached to the cover body 10 provided on the upper part of one of the front division body 5 and the rear division body 6 (the front division body 5 in this embodiment). Therefore, with one end 7A of the shock absorber 7 attached to the cover body 10, the installation of the shock absorber 7 is completed by attaching the cover body 10 to the upper part of the front division body 5, and by removing the cover body 10, the one end 7A of the shock absorber 7 is exposed, making it easy to install and replace the shock absorber 7.

[0044] [Slide support means] The slide support means S is, for example, such that guide pins P1, P2 provided at the front and rear of one of the front division body 5 and the rear division body 6 (front division body 5 in this embodiment) are inserted into long holes Q1, Q2 in the front-to-rear direction provided at the front and rear of the other of the front division body 5 and the rear division body 6 (rear division body 6 in this embodiment). By configuring the slide support means S with the guide pins P1, P2 and the long holes Q1, Q2, the structure of the slide support means S is simplified and the sliding action is reliable.

[0045] The slide support means S is installed above the drive surface E with which the friction roller D (see FIG. 8) of the friction roller type drive device FR is pressed. This ensures a continuous drive surface E without any irregularities. The slide support means S may also be installed below the drive surface E with which the friction roller D is pressed.

[0046] [Shock absorber] As shown in Figures 5 to 7, a front-rear shock absorber 7 is installed between the front divided body 5 and the rear divided body 6. The shock absorber 7 is, for example, a telescopic double-acting hydraulic damper made up of a cylinder tube 8, oil contained in the cylinder tube, and a piston rod 9, so that the speed can be adjusted in both the extension and compression directions. Therefore, when the first connecting rod 11 telescopically moves, a damping force is generated by the shock absorber 7, so that the impact can be mitigated.

[0047] As shown in Figures 5 to 7, the shock absorber 7 is built into the first connecting rod 11. This allows the axis M connecting the front and rear mounting parts 5A, 6A of the first connecting rod 11 shown in Figure 6 to be brought closer to the central axis N of the shock absorber 7, and allows the axis M and the central axis N to overlap with each other. This reduces the bending moment applied to the shock absorber 7, allowing the shock absorber 7 to directly and efficiently absorb impact.

[0048] In addition, since the shock absorber 7 is built into the first connecting rod 11, even if oil leaks from the shock absorber 7, the oil can be prevented from leaking from the first connecting rod 11, and therefore adhesion of oil to the friction roller D can be avoided. Therefore, the friction coefficient between the carrier A and the friction roller D does not become small, and the carrier A can be reliably transported by the friction roller type driving device FR.

[0049] [Arrangement of slide support means] 5 and 6, the guide pins P1, P2 and the long holes Q1, Q2 constituting the slide support means S are provided at two locations so as to sandwich the shock absorber 7 from the front and rear. This makes it possible to disperse the impact received at both ends of the slide stroke of the slide support means S.

[0050] [Slide Stroke] The slide stroke of the slide support means S is set to be smaller than the stroke of the shock absorber 7. This makes it possible to prevent damage to the shock absorber 7.

[0051] [Distance between front and rear guide pins, and distance between front and rear long holes] If the distance between the front and rear guide pins P1, P2 of the first connecting rod 11 is L1, and the distance between the front and rear mounting holes 5A, 6A of the first connecting rod 11 when the first connecting rod 11 is fully retracted as shown in Figure 6 is L2, then L1 > (L2 / 2).

[0052] In this embodiment, as described above, in order to secure the drive surface E against which the friction roller D (see FIG. 8) of the friction roller type drive device FR is pressed, the slide support means S is installed, for example, above the drive surface E. As a result, when the first connecting rod 11 expands and contracts, a force acts on the slide support means S in the vertical direction.

[0053] For example, referring to Fig. 6, when the first connecting rod 11 contracts, a rearward force F1 is applied to the front split body 5, causing an upward force F2 to be applied to the guide pin P2, and a forward force F1 is applied to the rear split body 6, causing an upward force F2 to be applied to the long hole Q1. If the amount of upward eccentricity from the axis M shown in Fig. 6 is EC, then equation (1) is obtained. F1×EC=F2×L1 (1)

[0054] As a premise, when the eccentricity EC cannot be changed because the height of the drive surface E is fixed, it is necessary to increase L1 in order to reduce F2 (the bending force acting on the slide support means S). In this embodiment, the distance L1 between the front and rear guide pins P1, P2 and the distance between the front and rear long holes Q1, Q2 are large, so that the bending force acting on the slide support means S is mitigated, and the extension and retraction movement of the first connecting rod 11 becomes smoother.

[0055] [The part whose side shape changes when the first connecting rod expands and contracts] 8, a friction roller D of the friction roller type driving device FR rotates around a rotation axis O and is pressed against a driving surface E of the first connecting rod 11. As a result, the first connecting rod 11 (conveyor carrier A) is transported in the transport direction F in FIG.

[0056] As shown in FIG. 8, the portion I on the side of the first connecting rod 11, whose shape changes when the first connecting rod 11 expands and contracts, i.e., when the front division body 5 and the rear division body 6 slide relatively in the fore-and-aft direction, is stepped to form a first front-and-aft opposing surface J1 extending approximately downward from the upper end, an upper-and-lower opposing surface K extending in the fore-and-aft direction from the lower end of the first front-and-aft opposing surface J1, and a second front-and-aft opposing surface J2 extending approximately downward from the end of the upper-and-lower opposing surface K.

[0057] As a result, when the friction roller D of the friction roller type drive device FR is pressed against the drive surface E on the side of the first connecting rod 11, first, the friction roller D is pressed against only the front divided body 5 as shown in Fig. 8(a). Next, the friction roller D is pressed against both the front divided body 5 and the rear divided body 6 as shown in Fig. 8(b). Next, the friction roller D is pressed against only the rear divided body 6 as shown in Fig. 8(c). Therefore, even if the extension stroke of the first connecting rod 11 is lengthened, the drive surface E against which the friction roller D is pressed can be secured.

[0058] According to the configuration of the conveyor carrier A in an embodiment of the present invention, the first connecting rod 11 is composed of a front division body 5 and a rear division body 6, and the front division body 5 and the rear division body 6 are supported by a sliding support means S so that they can slide relatively in the fore-and-aft direction, and a fore-and-aft shock absorber 7 is installed between the front division body 5 and the rear division body 6.

[0059] Therefore, since the first connecting rod 11 has an extension and contraction function and the shock absorber 7 generates a damping force, it is possible to mitigate large impacts acting on the carrier A when the carrier A is used in a power and free type conveyor and to suppress the generation of noise. Furthermore, since the front divided body 5 and the rear divided body 6 are supported by the slide support means S so that they can slide relatively in the front and rear directions, even if the shock absorber 7 is damaged during the transportation of the carrier A, the extension and contraction function of the first connecting rod 11 can be maintained, so there is no need to stop the transportation of the carrier A.

[0060] [Modified shock absorber] The "front-rear shock absorber" in the present invention is not limited to the shock absorber 7, which is a telescopic double-acting hydraulic damper. For example, two single-acting hydraulic dampers that can adjust the speed in the compression direction may be combined. An example in which a first shock absorber 17A, which is a single-acting hydraulic damper, and a second shock absorber 17B, which is a single-acting hydraulic damper, are combined, is shown in Figures 9 and 10.

[0061] 9 and 10, the first shock absorber 17A is supported by a first support Z1 provided on the front divided body 5, and the second shock absorber 17B is supported by a second support Z2 provided on the front divided body 5. The shock absorbers 17A and 17B face each other in the front-rear direction, and a support plate Y attached to the rear divided body 6 is disposed between the shock absorbers 17A and 17B.

[0062] For example, when the conveyor carrier A shown in Fig. 1 is stopped at a fixed position, a compressive force acts on the first connecting rod 11 shown in Fig. 9, and the receiving plate Y sandwiched between the shock absorbers 17A and 17B shifts in the conveying direction F (the direction X1 in which the first shock absorber 17A in Fig. 9 is compressed). Therefore, a damping force is generated by the first shock absorber 17A, which is a single-acting hydraulic damper that can adjust the speed in the compression direction and is compressed as shown in Fig. 9 to Fig. 10.

[0063] For example, when the engagement dog C of the conveyor carrier A shown in Fig. 1 engages with the traction dog B and the conveyor carrier A is pulled by the power chain drive device PC, an extension force acts on the first connecting rod 11 shown in Fig. 10, and the receiving plate Y sandwiched between the shock absorbers 17A and 17B shifts in the opposite direction to the conveying direction F (the direction X2 in which the second shock absorber 17B in Fig. 10 is compressed). Therefore, a damping force is generated by the second shock absorber 17B, which is a single-acting hydraulic damper whose speed can be adjusted in the compression direction and which is compressed as shown in Fig. 10 from Fig. 9.

[0064] The above description of the embodiments is given by way of example only and is not intended to be limiting, and various improvements and modifications can be made without departing from the scope of the present invention. [Explanation of symbols]

[0065] A Conveyor carrier B Towing dog C Engagement dog D Friction roller E Drive surface EC Eccentricity F Conveying direction F1,F2 Force FR Friction roller drive unit FT Free trolley GR Guide rail H Transported object support part I The part whose shape changes when the front and rear halves slide relatively forward and backward J1 1st front-rear opposing surface J2 2nd front-rear opposing surface K Upper and lower opposing surfaces L1 Distance between front and rear guide pins L2: Distance between the front and rear mounting holes of the first connecting rod when the first connecting rod is fully retracted LT Road Trolley M Axis connecting the front and rear mounting parts of the first connecting rod N Central axis of shock absorber O Rotation axis P1,P2 Guide pin PC Power chain drive unit Q1, Q2 slotted holes R1~R5 bolts S Slide support means T1~T5 Nut U, V Support W Transported object X1 The direction in which the first shock absorber is compressed X2 The direction in which the second shock absorber is compressed Y Support plate Z1 First support Z2 2nd support 1 Front end trolley 2 Front load trolley 3 Rear load trolley 4 Rear end trolley 5 Front division body 5A Mounting hole 6 Rear division body 6A Mounting hole 7 Shock absorber 7A, 7B Ends 8 Cylinder tube 9 Piston rod 10 cover body 11 first connecting rod 12 Second connecting rod 13 Third connecting rod 14a,14b,15a,15b,16a,16b through hole 17A 1st shock absorber 17B 2nd shock absorber

Claims

1. A conveyor carrier includes an object support portion for supporting an object to be conveyed, and the conveyor carrier moves along a conveying path formed by a guide rail, A front end trolley which is a free trolley having an engagement dog that engages with a traction dog of a power chain drive device and is supported and guided by the guide rail; A connecting rod located between the front end trolley and the transport support part; Equipped with The connecting rod is composed of a front split body and a rear split body, The front divisional body and the rear divisional body are supported by a slide support means so as to be relatively slidable in a front-rear direction, a front-rear shock absorber is installed between the front divided body and the rear divided body; The side surface of the connecting rod serves as a driving surface with which a friction roller of a friction roller type driving device is pressed. Conveyor carrier.

2. The shock absorber is built into the connecting rod.

2. The conveyor carrier of claim 1.

3. a portion of a side surface of the connecting rod, the portion being changed in shape when the front division body and the rear division body slide relatively in the front-rear direction, has a stepped shape that forms a first front-rear opposing surface extending substantially downward from an upper end, a top-bottom opposing surface extending in the front-rear direction from a lower end of the first front-rear opposing surface, and a second front-rear opposing surface extending substantially downward from an end of the top-bottom opposing surface, When the friction roller is pressed against the driving surface on the side surface of the connecting rod, the friction roller is pressed against one of the front divided body and the rear divided body in the order of one, both, and the other.

2. The conveyor carrier of claim 1.

4. the slide support means includes a guide pin provided at the front and rear of one of the front division body and the rear division body, which is inserted into a long hole extending in the front-rear direction and provided at the front and rear of the other of the front division body and the rear division body; The slide support means is installed above or below the driving surface with which the friction roller is in pressure contact, The slide stroke of the slide support means is smaller than the stroke of the shock absorber.

2. The conveyor carrier of claim 1.

5. The guide pin and the long hole are provided at two locations so as to sandwich the shock absorber from the front and rear.

5. The conveyor carrier according to claim 4.

6. The distance between the front and rear guide pins is L1, If the distance between the front and rear mounting holes of the connecting rod when the connecting rod is fully retracted is L2, L1>(L2 / 2) That is, 6. The conveyor carrier according to claim 5.

7. One end of the shock absorber is attached to a cover body provided on an upper portion of one of the front divided body and the rear divided body. A conveyor carrier according to any one of claims 1 to 6.

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