JP2012096698A - Loading platform elevating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loading platform elevating device capable of easily carrying out the work of applying a lubricant to a slide rail.SOLUTION: The loading platform elevating device, which includes: a loading platform which is elevated between the ground and a bed at the rear of a vehicle and is stored by sliding into the same; and a guide member that slidingly moves on the slide rail fixed on the vehicle while extending in one direction. The foregoing slide rail is provided with a lubricant circulation path which has a lubricant inlet opening on the external surface of the slide rail while having a lubricant discharge port on the slide surface on which the guide member slides.

Description

  The present invention relates to a load receiving table lifting device that is slidably stored in a vehicle.

  As a load receiving table lifting device that is slidably stored with respect to a vehicle, there is a device that has a structure in which the load receiving table can be lifted and lowered by a lifting means via a link mechanism, and slides the load receiving table when the load receiving table rises to a predetermined position ( Patent Document 1). The slide of the load receiving platform is performed by a slide member connected to the load receiving table sliding on a slide rail fixed to the vehicle. Therefore, a lubricant such as grease is periodically applied to the slide rail to prevent the slide performance from being deteriorated.

  By the way, the operation | work which grits and apply | coats this lubricant tends to become complicated. Major factors include the fact that the slide rail is provided below the loading platform of the vehicle and that the exposed portion of the sliding rail is limited by a link mechanism and a supporting member for the loading platform being arranged in the vicinity.

  Therefore, a load receiving base having a hollow slide rail having an opening below and a slide member inserted into the hollow portion of the slide rail from the opening, the slide member sliding on the hollow portion. A lifting device has also been proposed (Patent Document 2). In this load receiving platform lifting / lowering device, a lubricant supply device, specifically a pipe-shaped conduit is arranged in a portion of the slide member inserted into the hollow portion from the opening, Since the lubricant is sent to the sliding portion of the slide member from the top, the greasing operation is relatively simplified.

JP 2003-025900 A JP 2006-123680 A

  However, in the configuration in which the lubrication device is provided on the slide member as in Patent Document 2, an operator needs to perform the lubrication operation of the lubricant without sliding the load receiving table lifting device to the rear of the vehicle. The work must be complicated. Therefore, when the greasing operation is performed, it is generally performed in a state where the load receiving table lifting device is slid rearward. In other words, there is room for improvement because the position of the load receiving platform lifting device is limited in an actual greasing operation.

Lubricating of the lubricant is performed when the load receiving table lifting device is not driven. When the vehicle is in a running state or stopped after running, the load receiving platform lifting device is not driven, and in order to slide the above described load receiving platform lifting device backward from this state, for the greasing work A step of driving and sliding the load receiving table lifting device is required separately. In addition, the work space is reduced by sliding the load receiving table lifting device to the rear of the vehicle.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a load receiving table lifting / lowering device that can further simplify the lubrication operation of the lubricant.

  A load receiving platform that is raised and lowered between the ground and a loading platform at the rear of the vehicle and is slid and stored with respect to the vehicle, and a slide member that extends in one direction and slides on a slide rail that is fixed to the vehicle. In the load receiving platform lifting / lowering device, the slide rail is provided with a lubricant flow passage, and the lubricant flow passage has a lubricant inlet on a surface of the slide rail, and the slide on which the slide member slides. It has a lubricant discharge port in the moving part.

  The “sliding portion” refers to an area where a portion of the slide member arranged so as to be in contact with the slide rail and maintain a predetermined slide performance covers the slide rail. pointing.

The slide rail may extend in the vehicle front-rear direction, and the lubricant inlet may be provided at a rear portion of the slide rail. The “rear part” is not limited to the rear end face, and includes an inclined part and a side part behind the slide rail.
The slide rail may extend in the vehicle front-rear direction, and the lubricant discharge port may be provided in the front portion of the vehicle.

  Furthermore, at least one of the upper surface or the lower surface of the slide rail is the sliding portion, and the sliding portion may be inclined from the substantially central portion to the side portion along the width direction. It is.

  In addition, the sliding portion may be provided with a groove portion along the vehicle front-rear direction, and the lubricant discharge port may be arranged on the upper side of the groove portion or the groove portion.

  According to the present invention, since the flow passage for circulating the lubricant is provided in the slide rail and the injection port is provided on the surface of the slide rail, it is easy to inject the lubricant easily. In addition, by providing the inlet at a position where it is easy to inject appropriately according to the type of vehicle, the position of the load receiving platform lifting device is not limited. Since the injected lubricant is discharged to the sliding surface on which the slide member slides, the lubricant can be leveled to the slide rail by sliding the load receiving table.

It is a side view which shows the operation state of the cargo receiving stand raising / lowering apparatus which concerns on this embodiment. It is a principal part perspective part of the slide rail and guide member which concern on this embodiment. It is a principal part perspective view which shows the lubricant flow path of the slide rail which concerns on this embodiment. It is a top view which shows the drive state of the slide cylinder which concerns on this embodiment. It is a rear view of a slide member concerning this embodiment. It is sectional drawing which shows the lubricant flow path of the slide rail which concerns on another embodiment.

  An embodiment as an example of a cargo receiving platform lifting apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing an operation state in which the load receiving platform lifting device 100 according to the present embodiment is moved up and down behind the vehicle 1 and slides below the loading platform 1. The load receiving table lifting device 100 includes a slide member 3 provided on the chassis frame 2 and a load receiving stand 5 provided via a link mechanism 4.
The slide member 3 is provided so as to be slidable in the front-rear direction along the slide rail 6 disposed in a state of extending in the front-rear direction at the rear end portion of the chassis frame 2.

  The load receiving platform 5 has a distal end portion 51, an intermediate portion 52, and a proximal end portion 53 and can be folded. In the operation procedure for storing the load receiving platform 5 below the loading platform 11, first, as shown in FIG. 1A, the intermediate portion 52 with the front end portion 51 folded is leaned against the guide roller 7. Thereafter, a lift cylinder 45 for raising and lowering provided in the link mechanism 4 is used to make a state (slidable state) 5A shown by a two-dot chain line portion in FIG. The storage state 5B is obtained by sliding the vehicle forward using the.

The link mechanism 4 includes a tilt arm 42 that is pivotally supported on the first support bracket 41 via a connecting shaft 4a. On the upper side of the tilt arm 42, the base end of the lift arm 43 is connected to the support member 44 via the tilt arm 42 and the first support bracket 41. Note that a base end portion 53 of the load receiving platform 5 is rotatably connected to the tip of the lift arm 43.
A lift cylinder 45 is disposed below the lift arm 43, one end of which is pivotally supported by the tilt arm 42 and the other end is pivotally supported by the lift arm 43.

The slide member 3, the slide rail 6, and the link mechanism 4 are provided as a pair on the left and right sides of the chassis frame 2, and the left and right slide members 3 are coupled members (not shown) so as to slide the slide rail 6 synchronously. Are connected by The load receiving platform 5 is subjected to a slide operation as the slide member 3 slides.
As shown in FIG. 2, the slide means 8 for slidably operating the load receiving table lifting / lowering device 100 is composed of a set of two slide cylinders 81 and 82.

  The slide cylinders 81 and 82 are provided with main bodies so that the respective telescopic rods are opposite to each other. The rod end 81a of one slide cylinder 81 is connected to the connecting portion 6a (see FIG. 1B) of the slide rail 6 on the front side of the vehicle, and the rod end 82a of the other slide cylinder 82 is connected to the stay 6b (FIG. 1). It is connected to the slide member 3 via a).

  By moving these slide cylinders 81 and 82 to extend and move the slide member 3 along the slide rail 6, the load receiving platform 5 is slid in the vehicle longitudinal direction. When extending, the other slide cylinder 82 is first extended, and then one slide cylinder 81 is moved. On the other hand, when contracting, one slide cylinder 81 is contracted and the other slide cylinder 82 is contracted. However, the order of expansion and contraction may be reversed or simultaneous.

  Next, a description will be given of the slide member 3 that slides the load receiving table lifting device 100 in response to the expansion and contraction of the slide cylinders 81 and 82, and the slide rail 6 on which the slide member 3 slides.

  FIG. 3 shows a cross-sectional perspective view of the slide rail 6 according to the present embodiment. The slide rail 6 is an aluminum member molded by extrusion, and has a shape extending in the vehicle front-rear direction (X direction) and having a hollow portion. Each of the upper part 61 and the lower part 62 has a shape that is angled so as to incline from the central part to the side part in the width direction (Y direction), and the side parts 63 and 64 have a substantially vertical direction (Z direction) in the plane direction. As a plane processed shape.

  In the inclined portions 610 and 620 of the upper portion 61 and the lower portion 62, groove portions 601 and 602 are respectively provided at positions that are substantially intermediate portions in the vertical direction. The groove portions 610 and 620 extend in the longitudinal direction of the vehicle along the longitudinal direction of the slide rail 6. The upper portion 61 and the lower portion 62 are provided with an upper pad 31 and a lower side 32 made of a resin that come into contact with the inclined portion, so that the sliding performance of the sliding member 3 can be maintained.

  The upper portion 61 and the lower portion 62 are provided with lubricant flow passages 61a and 62a that are small in diameter and extend in the vehicle front-rear direction and allow a lubricant such as grease to flow through a predetermined portion. In addition to the lubricant flow passages 61a and 62a, two bolt holes 61b and 62b are provided on the upper side 61 and the lower side 62, respectively. The slide rail 6 is connected to the chassis frame 2 via a bracket 9, and when the slide rail 6 is fixed to the bracket 9, a bolt / nut fixing member 91 through the bolt holes 61 b and 62 b. Is used (see FIG. 1).

  The lubricant flow passages 61a and 62a will be further described. Since the upper portion 61 and the lower portion 62 have the same configuration, the upper portion 61 will be described as a representative. As shown in FIG. 4, the lubricant flow passage 61 a is inclined at a lubricant inlet 611 a for injecting grease into the rear end surface 61 </ b> A of the vehicle rear end 6 </ b> A of the slide rail 6, and the vehicle front end 6 </ b> B of the slide rail 6. And a lubricant discharge port 612a opening in the groove 601 of the portion 610. As shown in the enlarged view, the lubricant flow passage 61a has a portion bent substantially in the vehicle width direction in the vicinity of the lubricant discharge port 612a. Regarding the formation of the lubricant flow passage 61a, the first flow passage 613a is formed along the longitudinal direction when the slide rail 6 is extruded, and then the second flow passage 614a reaching the lubricant discharge port 612a along the vehicle width direction. By forming the above, the bent shape is obtained. Although illustration is omitted for convenience of explanation, the first flow passage 613a extends further toward the front of the vehicle than the portion where the second flow passage 614a intersects, and opens at the front end surface of the vehicle front end portion 6B. In order to prevent leakage of the lubricant to be injected, the opening is closed. By using this lubricant flow passage 61a, it is possible to easily perform a grease supply operation for injecting grease from the outside of the slide rail 6 and sending the grease into the slide rail 6 to be discharged onto the surface of the slide rail 6. it can. The second flow passage 614a is provided so as to penetrate the two inclined portions 610 of the upper portion 61.

  Since the rear end surface 61A of the slide rail 6 provided with the lubricant inlet 611a is in the vicinity of the rear end of the vehicle, the lubricant can be easily injected, and there is no need for complications such as diving under the loading platform. Moreover, since the load receiving platform lifting / lowering device 100 is located in front of the vehicle, the work space for the greasing operation is not limited. Further, the lubricant is discharged to the outer surface of the inclined portion 610 from the lubricant discharge port 612a of the vehicle front end portion 6B. Since the outer surface (inclined portion 610) serves as a sliding surface of the upper pad 31 of the slide rail 6, the lubricant can be leveled into the inclined portion 610 by the sliding operation of the slide member 3.

  Moreover, since the lubricant discharge port 612a is provided in the groove part 601, the discharged grease can be detained in the groove part. Therefore, by supplying the required amount of lubricant, the lubricant can be stretched and leveled to the rear of the inclined portion 610 using the slide operation of the load receiving table lifting device 100. In particular, when the greasing operation is performed, if the upper pad 31 is disposed so as to cover the lubricant discharge port 612a, the lubricant can be discharged so as to fill the groove portion 601 extending in the vehicle front-rear direction, Furthermore, it is possible to efficiently apply the lubricant to the entire inclined portion 610. Further, even if the upper pad 31 is arranged so as to cover the lubricant discharge port 612a, a space area is secured between the upper pad 31 and the lubricant discharge port 612a by providing the groove portion 601. Lubricant such as grease can be discharged along the vehicle longitudinal direction.

In the present embodiment, the lubricant discharge port 612a is provided at the vehicle front end 6B. However, the present invention is not limited to this, and for example, the lubricant discharge port 612a may be provided at the center portion or the rear end along the vehicle front-rear direction. I do not care. Alternatively, the lubricant discharge port 612a may be provided at the plurality of positions. In addition, the lubricant discharge port 612a may be provided above the groove portion 601 so that the grease that has flowed on the outer surface of the inclined portion 610 stays in the groove portion 601. Regarding the groove portion 601, a plurality of rows of groove portions 601 may be provided in one inclined portion 610. Not only the structure which extends | stretches only the same length along the longitudinal direction of the slide rail 6, but the structure formed only in the one part area | region along the longitudinal direction after shaping | molding of the extrusion process of the slide rail 6 may be sufficient. Further, a configuration in which the grease flows from the upper side to the lower side without providing the groove portion 601 is also possible.
The slide member 3 that slides on the slide rail 6 has the configuration shown in FIG.

  The slide member 3 includes an upper pad 31 and a lower pad 32 that slide in contact with the outer surfaces of the upper portion 61 and the lower portion 61 of the slide rail 6 and attachment pads 303a and 304a. It has an upper member 303 and a lower member 304 that support the upper surface and the lower surface, and side members 305 and 306 that are erected on the side of the slide rail 6 in a state where these members 303 and 304 are suspended. The pair of left and right slide members 3 are connected by a connecting member 3A so as to slide in synchronization with each other.

  Each of the upper pad 31 and the lower pad 32 has a shape that is recessed in the thickness direction, and the recessed portion has a valley shape that is inclined from both side portions toward a substantially central portion in the vehicle width direction. The inclined portions 310 and 320 of the upper pad 31 and the lower pad 32 are in contact with the inclined portions 610 and 620 of the upper portion 61 and the lower portion 62 of the slide rail 6. In addition, the lower pad 32 can be kept in close contact with the slide rail 6. Since the slide rail 6, the upper pad 31, and the lower pad 32 have a shape symmetrical with respect to the virtual straight line m passing through the substantially central portion in the width direction, the slide rail 6, the upper pad 31, and the lower pad 32 can be slid with a centering function. it can. In other words, the load receiving table elevating device 100 is slid in a state where swinging in the vehicle width direction is suppressed. As a result, stable slide performance can be exhibited without providing a guide member that supports the side portions 63 and 64 of the slide rail 6.

  The upper pad 31 and the lower pad 32 are provided with projecting end portions 311 and 321 projecting by a width w so as to straddle the side end portion of the slide rail 6. The projecting end portions 311 and 312 contribute to the suppression of the above-described swinging, and a space region is formed between the projecting end portions 311 and 321 of the upper pad 31 and the lower pad 31, respectively. It is good also as a structure by which the side guide member was distribute | arranged so that it might fill. In the case where the side guide member is provided, a lubricant flow passage may be similarly provided in order to suppress a decrease in sliding performance of the side guide portion with respect to the side portions 63 and 64.

  For example, with respect to the lubricant flow passage 61a in the upper portion 61 of the slide rail 6, the lubricant discharge port 612a is provided in the groove portion 601, but the upper pad 31 is within the region (pad covering region) R covered with the upper pad 31. The lubricant can be leveled on the sliding part. In particular, the groove portion 601 is not a portion where the upper pad 31 directly slides, but is included in the pad coating region R, and the lubricant can be leveled to a portion where the upper pad 31 directly slides. That is, even if the lubricant discharge port 612a is not provided in the portion where the upper pad 31 directly slides, the same effect can be obtained as long as it is provided in the successful pad coating region R.

  Regarding the lubricant flow passages 61a and 62a according to the present embodiment, a configuration in which a second flow passage 614a provided in a substantially horizontal direction with respect to the first flow passage 613a extending along the longitudinal direction of the slide rail 6 is combined. However, the second flow passage 614a may have a shape extending in another direction (portion 6141a). For example, as shown in FIG. 6A, the second flow passage 6141a having the lubricant discharge port 6121a at the top of the mountain portion of the upper portion 61 and extending in the vertical direction is also indicated by an arrow in the drawing. In addition, the lubricant (grease) can flow from the top to the inclined portion 610, and the same effect can be obtained.

  The upper portion 61 and the lower portion 62 having the inclined portion 610 can be applied because they have the same aligning function even if the upper pad 31 and the lower pad 32 have a mountain shape instead of a mountain shape. Alternatively, one of the upper portion 61 and the lower portion 62 of the slide rail 6 may be a mountain shape, the other may be a valley shape, and the upper pad 31 and the lower pad 32 may each have a corresponding shape. It is also possible to change the position, size, or number of the lubricant flow passages 61a, 62a provided corresponding to the shapes of the upper portion 61 and the lower portion 62. For example, as shown in FIG. 6B, in the case of a valley-shaped lower part 6211 and a mountain-shaped lower pad 321, two lubricant flow passages 62a1 are provided to send the lubricant vertically downward. A second flow passage 6241a may be provided. Lubricant can be supplied to the contact portion between the lower pad 321 and the lower portion 6211 by providing the lubricant discharge port 6221a in the inclined portion 620a1 that forms a valley shape at the tip of the second flow passage 6241a. .

  With respect to the portion to which the lubricant is supplied, pad members such as the upper pad 31 and the lower pad 32 that prevent the sliding member 3 and the slide rail 6 from being worn are not only the outer surface of the slide rail 6 but also other members. If it is a structure arranged on a part, for example, the inner surface, a structure in which a lubricant discharge port is provided on the inner surface may be adopted. A hollow portion 630 (see FIG. 3) is formed on the slide rail 6 to reduce the weight. However, if a pad member is provided on the inner surface forming the hollow portion 630, the inner surface is provided with this structure. By providing the 2nd flow path which leads, the internal surface can be lubricated and the same effect can be acquired.

  The lubricant inlets 611a and 621a for injecting the lubricant are provided not on the rear surface 61A of the slide rail 6 but on the side surfaces 63 and 64, the inclined portions 610 and 620, etc., if the rear end portion 6A of the slide rail 6 is used. Even in the configuration, the load receiving platform lifting device 100 can be lubricated while being placed forward, and the same effect can be obtained. As described above, the injection of the lubricant is generally performed when the load receiving platform lifting / lowering device 100 is moved to the front side of the vehicle along the slide rail 6, so that the slide rail 6 exposed at the rear end is exposed. It is good if it is a part. Furthermore, since the lubrication work can be performed without being restricted by the position of the load receiving platform lifting device 100 with the slide rail 6 according to the present embodiment, the lubricant injection port 611a is located at the rear of the vehicle on the slide rail 6. It is not limited to the end portion 6A, and may be, for example, the front of the vehicle or an intermediate portion. These lubricant injection ports 611a and 621a are connected to a nipple and used to inject the lubricant, but can also be used to inject lubricant from the nipple via a tube or the like.

  In addition, the lubricant flow passages 61a and 62a have been described as passages through which the lubricant flows directly. However, a conduit such as a pipe or a tube may be inserted into the passage, and the lubricant may be passed through the conduit. . In addition, the first flow path and the second flow path that constitute the lubricant flow paths 61a and 62a are closed circuits that are not opened except for the injection port and the discharge port, but may be open circuits that have upper portions opened. A configuration in which a conduit is arranged in the open circuit may be used. Furthermore, it is possible to adopt a configuration in which a conduit is arranged along the longitudinal direction without providing a through passage along the longitudinal direction of the slide rail 6 and this conduit is used as a lubricant flow passage.

  In addition, although it was set as the structure which has the link mechanism 4 regarding the load receiving device raising / lowering apparatus 100, if it has a slide function, a pair of post will be provided in the right and left of a vehicle, and a load receiving stand will be supported and it will raise / lower in a post The slider arranged in a possible manner can be applied to a load receiving table lifting device having a configuration using the expansion and contraction force of a hydraulic cylinder and other configurations. The place where the raising / lowering operation of the load receiving platform 5 is performed is not limited to the rear side of the vehicle, and a configuration that is performed on the side of the vehicle and slides in the vehicle width direction can obtain the same effect.

  INDUSTRIAL APPLICABILITY The present invention is useful for all types of load receiving platform lifting devices having slide members that slide along slide rails.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Chassis frame 3 Slide member 4 Link mechanism 5 Load receiving stand 6 Slide rail 7 Guide roller 8 Slide means 9 Bracket 31 Upper pad 32 Lower pad 6A Slide rail rear end 6B Slide rail front end 61a, 62a Lubricant distribution Paths 601 and 602 Groove portions 611a and 621a Lubricant injection ports 612a and 622a Lubricant discharge ports

Claims (5)

A load receiving platform that is raised and lowered between the ground and a loading platform at the rear of the vehicle and is slid and stored with respect to the vehicle, and a slide member that extends in one direction and slides on a slide rail that is fixed to the vehicle. In the loading platform lifting device,
The slide rail is provided with a lubricant flow path,
The lubricant receiving passage elevating apparatus, wherein the lubricant flow passage has a lubricant injection port on a surface of the slide rail, and has a lubricant discharge port in a sliding portion where the slide member slides. The slide rail extends in the longitudinal direction of the vehicle,
The cargo receiving platform lifting apparatus according to claim 1, wherein the lubricant inlet is provided at a rear end portion of the slide rail. The slide rail extends in the longitudinal direction of the vehicle,
The cargo receiving platform elevating device according to claim 1, wherein the lubricant discharge port is provided in a front portion of the vehicle. At least one of the upper surface or the lower surface of the slide rail is the sliding portion,
The said receiving part is a shape inclined toward the side part from the substantially center part along the width direction. The load receiving stand raising / lowering apparatus in any one of Claim 1 to 3 characterized by the above-mentioned. The sliding portion is provided with a groove along the vehicle longitudinal direction,
The load receiving device lifting / lowering device according to claim 4, wherein the lubricant discharge port is disposed on the groove portion or on the upper side of the groove portion.

Images