JPH0671285U - Automatic walking device for lorries - Google Patents

Abstract

(57) [Abstract] [Purpose] The mounting space in the longitudinal direction of the drive element of the step board is shortened and the weight is reduced to improve the mounting property, and
Improve workability of cargo handling. [Structure] The connecting rods are connected across the rear parts of the left and right step plates that project rearward from the left and right storage parts on the lower side of the loading platform, and the drive element at the center of the rear part on the lower side of the loading platform is sequentially extended toward the rear of the tail part of the loading platform and A multi-stage accommodating portion composed of a first movable accommodating portion to an n-th movable accommodating portion capable of returning, and a rod of a preceding cylinder and a cylinder body of a succeeding stage connected in parallel in the multi-accommodating accommodating portion. The first cylinder is connected to the fixed accommodating portion, and the rod of the nth cylinder at the final stage is connected to the tip of the movable accommodating portion at the final stage. The tip of the movable accommodating portion at the final stage is connected to the connecting rod.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic walking device for a lorry, and when carrying out cargo handling using a walk board, the walk board is pulled out from under the cargo bed to carry out cargo work, and at the time of cargo handling without using the walk board, the walk board is stored below the cargo bed. In particular, the mounting space of the drive element of the step board, that is, the longitudinal direction is short and the weight is light and the mounting property is excellent, and it is strong against falling objects and has excellent workability in loading and unloading. is there.

[0002]

[Prior art]

 As a conventional example, there is a walk board device for a freight vehicle described in Japanese Utility Model Publication No. 4-31158 developed by the applicant. The structure of this device is that a connecting rod is installed on the rear part of the step plate that protrudes from the rear left and right rear parts of the loading platform to the rear of the loading platform tail, and the rod of the cylinder on the underside of the loading platform is connected to this connecting rod. It is what

In this device, the rear parts of the left and right walk boards are connected to the connecting rod so as not to swing freely, and in this relationship, the connecting rod is pulled and pulled out as the cylinder operates. The parallel spacing between the walking boards is maintained and the cargo can be safely handled.

By the way, the cylinder is a long one having an expansion / contraction stroke required for pulling out and storing the left and right step plates through the connecting rod, so that the mounting space at the rear of the loading platform is reduced. Especially, as the space in the longitudinal direction becomes long and large, the cylinder itself becomes long and the weight increases, and the problem of inevitability of mounting is inevitable. In particular, in the case of a freight vehicle having a short platform length, the problem of mounting property becomes even more serious because the mounting space is occupied up to the rear wheel axle. Moreover, since the rod of the cylinder is in a state of being exposed when the step board is pulled out, there is a problem that it is very weak against a fallen object or the like.

[0005]

[Problems to be solved by the device]

 The problems to be solved are the structure in which a long cylinder is mounted, so that the mounting property cannot be improved, the fear that the rod will be damaged by a falling object, etc., and As for the driving element by this cylinder, it is used only for pulling out and returning the left and right step plates.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned subject, in the automatic walking device of a freight vehicle, which is capable of feeding and reciprocating the left and right footboards under the cargo bed with the drive elements to the rear of the tail of the cargo bed, the left and right footboards are the rear parts of the lower floor of the cargo bed. It is stored in the storage parts on the left and right, leaving the rear part of the step board behind, and the connecting rods are connected to the rear parts of the left and right step plates protruding from the opening of the tail part of the platform, and the drive element is located on the lower side of the platform. In addition to the fixed accommodating section at the center of the rear part, and the multi-stage accommodating section including the first movable accommodating section to the n-th movable accommodating section that can be sequentially extended and retracted rearward from the fixed accommodating section, the multi-stage The first cylinder is a solid multi-stage cylinder consisting of the first cylinder to the n-th cylinder in which the rods of the front stage cylinder and the cylinder body of the next stage are connected integrally in parallel in the container. The housing and the rod of the n-th cylinder in the final stage are connected to the rear of the movable housing in the final stage, respectively, and the rear end of the movable housing in the final stage is connected to the connecting rod. It is characterized by

In addition, the number of stages of the movable accommodating portions of two or more stages in the multi-stage accommodating portion of the present invention is selected in consideration of the mounting space (length in the longitudinal direction) under the loading platform and the feeding length of the step board. . The multi-stage accommodating portion preferably has a flat rectangular tube shape, and is made of a metal or a hard resin. The multi-stage cylinder is of hydraulic or air type, and the number of stages is basically one less than the number of stages of the multi-stage accommodating portion, but is not limited. In addition, the connecting rod connected to the rear part of the left and right walking boards may be a connecting shaft, or the walking board can be moved in parallel in the axial direction with respect to the connecting rod, and the left and right distances can be adjusted. Alternatively, it may be a road plate (see Japanese Utility Model Publication No. 4-31155) that fills a step between the rear end of the walk plate and the ground. Also, if the multi-stage storage part is structurally strengthened so that it will not be damaged by the load from above when it is extended, not only as a walk board for workers, but also for heavy objects such as tricycles. Can be used as a walk board that enables cargo handling.

[0008]

[Action]

 The connecting rods are connected across the rear of the left and right step plates that project rearward from the storage sections on the left and right rear sides of the lower loading platform, and the drive element in the center of the lower rear portion of the lower loading platform is sequentially extended and retracted toward the rear of the tail portion of the loading platform. A movable multi-stage accommodating portion including first movable accommodating portion to n-th movable accommodating portion, and a rod of the cylinder of the preceding stage and a cylinder body of the succeeding stage are connected together in parallel in the multi-stage accommodating portion. The multi-stage cylinder including the first cylinder to the n-th cylinder is provided, and the first cylinder is connected to the fixed accommodating portion and the rod of the n-th cylinder at the final stage is connected to the rear portion of the movable accommodating portion at the final stage. Since the rear end of the movable accommodating section at the final stage is connected to the connecting rod, each movable accommodating section is extended as the multi-stage cylinder extends, and is linked to the movable accommodating section at the final stage. Running board of the left and right through the connection rod can be pulled out at the same time, also, it is possible to store the left and right running board simultaneously by Chijimido of the multi-stage cylinder.

The drive element can be shortened in its overall length when stored, and can be made lighter in weight. Therefore, it is possible to improve the mountability and to mount the drive element without trouble even if the length of the bed is short.

Since the multi-stage cylinder is covered by the multi-stage accommodation part and the impact due to a falling object is received by the multi-stage accommodation part to protect the cylinder from being loaded, there is a risk that the rod may be damaged. It is possible to obtain a stable work.

Since the multi-stage accommodation portion can be used also as a walk board in the extended state, it can be effectively utilized as a walk board for workers and the like.

[0012]

【Example】

 1 to 4 illustrate a first embodiment of an automatic walking device for a freight vehicle of the present invention. This automatic walking device 1 does not use a step board 4 under a rear part of a luggage carrier 3 of a freight vehicle 2. It is installed so as not to interfere with cargo handling work in some cases.

Therefore, storage parts 5 are provided on the left and right rear parts of the lower surface of the luggage carrier 3, and openings 6 serving as entrances and exits thereof are formed in the luggage carrier tail portion 7. The walking boards 4 are provided in the left and right accommodation parts 5. The rear end portion 4b is stored so that it can be pulled out freely, and the connecting rod 8 is connected across the rear end portions 4b of the left and right step plates 4. The connecting rod 8 is connected to a drive element 9 which will be described below under the rear part of the luggage carrier 3, and the left and right walk plates 4 are simultaneously pulled out from the storage section 5 through the connecting rod 8 by the drive of the drive element 9. In addition, they are stored in the storage unit 5 at the same time.

The walk plate 4 is formed in a long shape capable of bridging the rear end of the loading platform 3 and the ground, and the end of the round rod-shaped connecting rod 8 is inserted into the hole 10 at the rear end 4b. The lower surface of the front end portion 4a of the walk board 4 is slidably mounted on a guide rail 11 arranged from the bottom of the storage portion 5 to the rear of the opening 6, and is guided by the guide rail 11 and stored. It can be pulled out and stored in the storage position in the portion 5 and the extraction position in which it is drawn out from the opening 6 and guided in a flush manner at the same height as the surface of the loading platform 3.

The drive element 9 has a multi-stage accommodating portion 12 and a multi-stage cylinder 19, and this multi-stage accommodating portion 12 includes a flat rectangular tubular fixed accommodating portion 13 fixed to the center of the rear part under the luggage carrier 3. , The flat movable first movable accommodating portion 14 that can be extended and retracted from the fixed storage portion 13 toward the rear while leaving the front end toward the rear from the inside of the first movable accommodating portion 14. The second movable accommodating portion 15 has a flat rectangular tube shape that can be extended and retracted.

Then, the projecting piece 16 at the rear end of the second movable accommodating portion 15 is connected to the projecting piece 17 on the connecting rod 8 side by a pin 18, and the first and second movable accommodating portions 14, 15 are fed out. The connecting rod 8 and the left and right step plates 4 are driven to be pulled out and stored while being moved back and forth, and the connecting rod 8 can be vertically swung about the pin 18 as a fulcrum. In addition, the vertical movement of the rear end portion 4b of the walking board during landing can be dealt with.

The multi-stage cylinder 19 arranged in parallel in the multi-stage accommodating portion 12 comprises a first cylinder 20 and a second cylinder 21, and the front end of the main body of the first cylinder 20 is in front of the fixed accommodating portion 13. It is fixed to the fixed shaft portion 22 erected on the end side, and the tip of the rod 20a is connected to the rear portion of the first movable accommodating portion 14 and the mounting body 23 in an integrally interlocking manner to extend the first cylinder 20. Accordingly, the first movable accommodating portion 14 and the second movable accommodating portion 15 are extended backward from the fixed accommodating portion 13, and the first movable accommodating portion 14 is fixed together with the second movable accommodating portion 15 by the contraction operation of the cylinder. I am going to move back within 13.

The rear end of the main body of the second cylinder 21 is integrally connected to the tip of the rod 20 a of the first cylinder 20 via the mounting body 23, and the front end of the rod 21 a is a protrusion of the rear end of the second movable accommodating portion 15. The second movable accommodating portion 15 is fixed to the second movable accommodating portion 15 and integrally connected to the second movable accommodating portion 15, and the second movable accommodating portion 15 moves rearward from the inside of the first movable accommodating portion 14 as the second cylinder 21 extends. The second movable accommodating portion 15 is returned to the inside of the first movable accommodating portion 14 by feeding out and contracting the cylinder.

The attachment body 23 is inserted through the longitudinal long groove portion 25 of the second movable accommodating portion 15 and is fixedly fixed to the rear end of the first movable accommodating portion 14, so that the second movable accommodating portion 15 is extended. And I try not to hinder the recovery.

As a result, the drive element 9 can be shortened in its overall length when it is stored, and can be made lighter in weight. Therefore, it is possible to improve the mountability and it does not matter even if the length of the loading platform 3 is short. Can be mounted.

The first cylinder 20 and the second cylinder 21 are covered with the first movable accommodating portion 14 and the second movable accommodating portion 15, so that the first and second movable accommodating portions 14 and 15 receive an impact caused by a falling object or the like. Since it is stopped to protect the cylinders 20 and 21 from being loaded, there is no fear of damaging the rods 20a and 21a, and stable operation can be obtained.

Since the first and second movable accommodating portions 14 and 15 can be used also as the third walk board in the extended state, they can be effectively utilized as a walk board for workers and the like.

As the first and second cylinders 20 and 21 extend, the respective movable accommodating portions 14 and 15 are extended, and the left and right walks are made through the connecting rod 8 integrally integrated with the second movable accommodating portion 15 at the final stage. The side board 4 can be pulled out at the same time, and the left and right side boards 4 can be stored at the same time by the contraction of the first and second cylinders 20 and 21.

The rod 20 a of the first cylinder 20 is connected to the rear portion of the first movable accommodating portion 14 in an integrally interlocking manner via the mounting body 23, and is connected to the longitudinal groove 25 formed in the second movable accommodating portion 15. Since the mounting body 23 is inserted, the second movable accommodating portion 15 can be smoothly extended / removed following the expansion / contraction operation of the rod 21a.

The projecting piece 16 at the rear end of the second movable accommodating portion 15 and the projecting piece 17 on the connecting rod 8 side are connected by a pin 18, so that the connecting rod 8 can be vertically swung about the pin 18 as a fulcrum. Therefore, it is possible to cope with the vertical movement of the rear end portion 4b of the walking board at the time of landing, and it is possible to remarkably reduce the load on the multi-tiered accommodating portion 12, and the operation is good.

FIG. 5 and FIG. 6 illustrate a second embodiment of the automatic walking device for a freight vehicle of the present invention. Since the configuration is basically the same as that of the first embodiment, it is common. Description of the different configurations will be omitted, and different configurations will be described.

An inwardly projecting locked portion 26 is formed at the rear end of the first movable storage portion 14, and an outwardly projecting locking portion 27 is formed at the front end of the second movable storage portion 15. The locking portion 27 is locked to the locked portion 26 when the second movable accommodating portion 15 is fully extended. The long groove portion 25 in the second movable accommodating portion 15 is not formed.

As a result, the same effects as those of the first embodiment are obtained, and further, since the long groove portion 25 is not opened in the second movable storage portion 15, there is an advantage that it is preferable in appearance.

7 and 8 illustrate a third embodiment of the automatic walking device for a freight vehicle of the present invention. Since the configuration is basically the same as that of the first embodiment, it is common. Description of the different configurations will be omitted, and different configurations will be described.

The mounting body 23 is substantially equal to the length of the second cylinder 21, and the rear end of the mounting body 23 is the rod 20a of the first cylinder 20 and the front end of the mounting body 23 is the front end of the second cylinder 21 and the first movable body. The front end of the accommodating portion 14 is integrally connected to each other. The long groove portion 25 in the second movable accommodating portion 15 is not formed.

As a result, the same effects as those of the first embodiment are obtained, and further, since the long groove portion 25 is not opened in the second movable storage portion 15, there is an advantage that it is preferable in appearance.

[0032]

[Effect of device]

 A. According to claim 1, the drive element can be shortened in its total length when stored, and can be lightened in weight. Therefore, it is possible to improve the mountability and to mount the drive element without trouble even if the length of the loading platform 2 is short. .

B. According to the above paragraph, the multi-stage cylinder is covered by the multi-stage storage part, and the impact from a falling object is received by the multi-stage storage part to protect the cylinder from being loaded. You can get stable work without any fear.

C. According to the above paragraph, since the multi-stage accommodation unit can be used as a walk board in the extended state, it can be effectively used as a walk board for workers.

D. According to the above paragraph, each movable accommodating part is extended as the multi-stage cylinder extends, and the left and right step plates can be pulled out simultaneously through the connecting rod that is integrally interlocked with the final movable accommodating part. The left and right walking boards can be stored at the same time by the contraction of the cylindrical cylinder.

[Brief description of drawings]

1 is a partially cutaway plan view showing a first embodiment of an automatic walking apparatus for a lorry according to the present invention.

FIG. 2 is a partially cutaway plan view of a state where left and right step plates are pulled out by a driving element.

FIG. 3 is an enlarged sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a plan view partially showing a second embodiment of an automatic walking apparatus for a lorry according to the present invention in a partial cross section.

FIG. 6 is a partial cross-section of the same plan view showing a state in which a multi-stage accommodating portion is extended.

FIG. 7 is a partially cutaway plan view of an essential part showing a third embodiment of the automatic walking device for a lorry of the present invention.

FIG. 8 is a partial sectional view of the same plan view showing a state where the multi-stage accommodating portion is extended.

[Explanation of symbols]

 1 Automatic walking device 2 Freight vehicle 3 Luggage platform 4 Walking plate 4a Front end of walking plate 4b Rear end of walking plate 5 Storage part 6 Opening of storage part 7 Tail part of connecting part 8 Connecting rod 9 Driving element 10 Hole of walking plate 11 Guide Rail 12 Multi-stage storage unit 13 Fixed storage unit 14 First movable storage unit 15 Second movable storage unit 16 Second movable storage unit projecting piece 17 Connecting rod projecting piece 18 Pin 19 Multi-stage cylinder 20 First cylinder 20a First Rod of cylinder 21 Cylinder of second cylinder 21a Rod of second cylinder 22 Fixed shaft part of fixed accommodating part 23 Mounting body 24 Projection part of second movable accommodating part 25 Long groove part of second movable accommodating part 26 Cover of first movable accommodating part Locking part 27 Locking part of the second movable accommodating part

Claims (1)

[Scope of utility model registration request] 1. An automatic walking device for a freight vehicle, wherein left and right footboards under a cargo bed can be moved back and forth to the rear of the tail part of a cargo bed by a drive element. Is stored with the step board rear part left, and connecting rods are connected across the left and right step board rear parts projecting from the opening of the tail part of the luggage carrier, and the drive element is
It has a fixed accommodating portion at the rear center of the lower side of the loading platform, and a multi-tiered accommodating portion composed of a first movable accommodating portion to an n-th movable accommodating portion that can be sequentially extended and moved backward from the fixed accommodating portion toward the rear of the tail portion of the loading platform. At the same time, in the multi-stage accommodating portion, the first cylinder is a multi-stage cylinder composed of the first cylinder to the n-th cylinder in which the rod of the front-stage cylinder and the cylinder body of the next-stage are integrally connected. The stationary accommodating portion and the rod of the n-th cylinder in the final stage are connected to the rear portion of the movable accommodating portion in the final stage, respectively, and the rear end of the movable accommodating portion in the final stage is connected to the connecting rod. An automatic walking device for a lorry, which is characterized in that