JP2014189181A - Door device of carrying vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door device of a carrying vehicle capable of preventing a cargo from recessing by contact with the cargo when a door is put in a closing state of a standing attitude, and preventing a flaw and a recess by protecting this door from a fork mast, when the door is put in an opening state of a hanging-down attitude, with a simple constitution.SOLUTION: The door 12 is rotatably provided between an upward-turned standing attitude and a downward-turned hanging-down attitude of a floor 16 of a loading space 2 via a shaft 13 along the horizontal direction in a side part or a rear end part of the loading space 2, and a band plate-like cushion member 15 composed of an elastic member for covering a surface of a panel member 18a for constituting the door 12, is provided along the lengthwise direction of the door 12 on an inside surface of a lower end part in the standing attitude of the door 12.

Description

  The present invention relates to a door device that opens and closes a side surface or a rear surface of a loading platform of a transport vehicle with a rotatable door.

In the luggage transport vehicle, for loading and unloading the luggage from the loading platform, a door is provided on the side surface and the rear surface of the loading platform so as to be rotatable by a horizontal axis, and by rotating the door, The side and rear of the luggage can be opened and closed. The door provided on the side is called a side gate, and the door provided on the rear is called a rear gate.
These doors (gates) are attached to a rotation angle of about 180 degrees by hinge members, and there are cases where loads are loaded and unloaded by a forklift in a state where each door is rotated to a downward hanging position. At that time, when the luggage is moved to the back, the fork mast may be applied to the door to check the loading position, and the door may be damaged or dented. In general, the door is made of an anodized aluminum alloy in order to improve the corrosion resistance and the appearance. However, the anodized film may be broken due to scratches or dents, and if left in this state, it causes corrosion. In addition, the rust of the fork mast may adhere to the aluminum fabric or damage the appearance due to the dent.
On the other hand, depending on the luggage, there is a case where the cargo is loaded up to the full width of the luggage compartment. At this time, if there is a step shape inside the door on the luggage compartment side, the inside of the door may contact the luggage and the luggage may be recessed. In order to avoid this, for example, the inner cover may be arranged at the position, and this may be attached with a dish rivet or the like to make the cargo compartment side flat.

For example, the techniques disclosed in Patent Documents 1 to 4 are known as means for preventing such a damage or dent to the door of a transport vehicle or a dent of a load.
In Patent Document 1, a protection plate is provided at the upper part of the wing wheel, thereby protecting the outer surface of the mold material rail at the upper part of the wing.
In the protective shock absorber of Patent Document 2, the shock absorber is provided so as to be attachable to the tilt via the fixing member, the ring-shaped member, and the connecting member, and this tilt is protected by fixing the shock absorber to the tilt with a magnetic force. .
The inner board for tilting plates of Patent Document 3 is affixed to the inner surface of the tilting plate, has small deformation and warpage, has high bending strength, and has improved weather resistance and chemical resistance.
In the hinge structure of the rotating member of the transport vehicle disclosed in Patent Document 4, the rotating member is provided so as to be rotatable in a standing posture and a rotating posture rotated from the standing posture with respect to the fixed member of the transport vehicle. . In this hinge structure, an elastic cover member is provided so as to cover the hinge shaft. In the standing posture, the cover member absorbs impacts and impact sounds of the load, etc. Intrusion into foreign material gaps is prevented.

Japanese Patent Laid-Open No. 10-86858 JP 2009-1253 A Japanese Patent No. 3821938 Japanese Patent No. 4838900

Patent Document 1 relates to a wing wheel cage structure, and is not intended to protect a side gate or a rear gate from a fork mast, or to prevent a dent of a load caused by these doors.
Although the protective shock absorber of Patent Document 2 prevents a flaw from being tilted, it is complicated by providing a fixture, a ring-shaped member, and a connecting member, and increases the number of parts, resulting in an increase in cost. In use, if the cushioning material is not on the loading / unloading side, it is necessary to remove the cushioning material and re-attach the magnetized material.
In Patent Document 3, the inner board for tilt plates is a multi-layer structure, but the manufacturing is complicated and the cost is increased.
Although the hinge structure of Patent Document 4 can protect the luggage when the luggage is loaded and prevent dents and the like, it is a structure in which the rotating member is rotated to a horizontal state and this rotating member is used for carrying the luggage. Yes, it is not intended to protect the rotating member from the fork mast when rotated to the lower side.

  The present invention has been made in view of such circumstances, and with a simple configuration, when the door is opened in a hanging position, the door is protected from the fork mast to prevent scratches and dents, and the door is It is an object of the present invention to provide a door device for a transport vehicle that can prevent the baggage from being dented by contact with the baggage when the standing posture is closed.

  The door device for a transport vehicle according to the present invention is provided between a standing posture toward the upper side of the floor of the loading platform and a hanging posture toward the lower side through a horizontal axis on the side or rear end of the loading platform. A door is provided so as to be freely rotatable, and a belt-like cushion member made of an elastic member covering the surface of the panel member constituting the door is provided on the inner surface of the lower end portion of the door in the standing posture. It is characterized by being provided along the vertical direction.

A simple structure with a band-shaped cushion member made of elastic material attached to the door can protect the surface of the panel member from impacts, etc., and the forklift can be used to load and unload loads with the door hanging down. Even when the fork mast is brought close to the door when the panel is pressed, the panel member is prevented from being damaged or dented by the fork mast coming into contact with the cushion member. As a result, it is possible to prevent the panel member from being corroded or deteriorating the appearance.
On the other hand, when the door is in the closed posture, the step of the inner surface of the door can be eliminated by the cushion member, and the dent of the load can be prevented even if the load contacts the cushion member.

In the door device for a transport vehicle according to the present invention, it is preferable that at least a part of the cushion member protrudes from the surface of the panel member.
By providing in this way, before a fork mast and a load collide with the surface of a panel member, it can contact a cushion member and can prevent interference to a door.

In the door device for a transport vehicle according to the present invention, the cushion member is provided so as to be curved so that a central portion in the width direction is convex outward, and a space is provided between the back surface and the panel member. A part may be formed.
By cushioning the cushion member so that it protrudes outward and providing a space on the back surface, when the cushion member comes in contact with the outside, a reaction force is generated due to the elasticity of the cushion member. As a cushion function is improved.

In the door device for a transport vehicle of the present invention, it is preferable that a plurality of protrusions be provided on the back surface of the cushion member.
As a result, the cushion member is formed in a flat shape, and the protrusions are formed in parallel on the back side thereof, and the space can be provided while the protrusions are in contact with the panel member when the cushion member is attached to the panel member. The cushioning function is exhibited while effectively exerting the elastic force of the cushion member.

Further, in the door device for a transport vehicle according to the present invention, a packing that abuts against the floor surface of the cargo bed when the door is in the standing posture is provided along the length direction of the door at the lower end of the door in the standing posture. In addition, the packing may be formed integrally with the cushion member.
In this case, by integrating the packing with the cushion member, it is possible to demonstrate the leakage prevention function from the floor to the outside by packing while reducing the number of parts, and the packing is easily attached to the door together with the cushion member. it can.

Furthermore, in the door device for a transport vehicle according to the present invention, the panel member is provided with a hinge member supported by the shaft in a fixed state, and a cover member that covers the fixed part of the hinge piece is provided, and the cushion is provided. The member is provided so as to cover the cover member.
Since the end portion of the bolt and the nut for fixing the hinge piece can be covered with the cover member, the inner surface of the panel member becomes flat. Since the cushion member is provided so as to cover the cover member from above, it is not necessary to use a flat fixing member such as a dish rivet when fixing the cover member, and the cost is reduced.

In the door device for a transport vehicle according to the present invention, the both side portions of the cushion member are formed with protrusions formed integrally with a wide width portion through a narrow connecting portion along the length direction, and the panel member. It is preferable that a groove having a larger width dimension than the opening is formed in order to fit the protrusion and prevent it from coming off.
It does not require rivets or screws, and can be attached simply by pushing the cushion member and fitting the protrusions into the groove portions of the panel member, which is simple and advantageous in terms of cost reduction and weight reduction.

According to the door device for a transport vehicle of the present invention, an open panel member can be protected with a simple configuration by attaching a belt-like cushion member to the door, and the fork mast approaches the door when loading and unloading luggage with a forklift or the like. Sometimes, the fork mast is prevented from coming into contact with the panel member, and scratches and dents are hardly formed. In addition, since the cushion member is provided by the elastic member, the impact due to the fork mast or the like can be effectively absorbed, and the noise due to the contact between the metals can be eliminated to obtain a silencing effect.
Even if the forklift contact is too strong and the part covered with the cushion member is deformed, the cushion member will be restored to its original state by its elastic force. There is no loss of sex.
The cushion member can reduce the level difference on the luggage compartment side when the door is closed, and can prevent the dent of the luggage due to the level difference.
In addition, since the cushion member has a simple structure in which the cushion member is simply provided on the door, and the cushion member can be made of an elastic material such as ethylene propylene rubber, the cost can be reduced and the weight can be reduced.

It is sectional drawing which shows the door apparatus of 1st Embodiment of this invention, and shows the state which the solid line closed and the two-dot chain line opened. It is sectional drawing to which the principal part of the open state of the door apparatus of FIG. 1 was expanded. It is sectional drawing which shows the state which isolate | separated the cushion member from FIG. It is a front view which shows the example of the transport vehicle to which the door apparatus of this invention is applied. It is sectional drawing which expands and shows the principal part of the open state of the door apparatus of 2nd Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the open state of the door apparatus of 3rd Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the open state of the door apparatus of 4th Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the closed state of the door apparatus of 5th Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the closed state of the door apparatus of 6th Embodiment of this invention.

Hereinafter, embodiments of the door device of the present invention will be described with reference to the drawings.
FIG. 4 shows an example of a transport vehicle to which the door device of the present invention is applied. In the case of the transport vehicle 1 shown in the figure, it is applied to the side gate 12 provided at the lower side of the loading platform 2, but it may be applied to a rear gate (not shown).
In the following detailed description of the door device 10, the side gate or the rear gate for the loading platform 2 is unified as the door 12 without distinguishing the type of the transport vehicle 1.

  As shown in FIGS. 1 to 4, the door 12 in the door device 10 is placed on the side or rear end of the loading platform 2, with the standing posture directed downward above the loading platform 2 via the shaft 13 along the horizontal direction, and downward. It is provided so as to be pivotable between a downward hanging posture. A cushion member 15 as will be described later is provided on a part of the surface of the door 12. The loading platform 2 is usually formed in a rectangular parallelepiped box shape, and in this example, the door 12 is rotatably provided via a hinge member 17 formed of a hinge having an axis at the end of the floor 16. In FIG. 1, when the door 12 stands on the floor 16, the lower end surface 18 of the door 12 comes into contact with the floor 16, and at this time, the door 12 is in a closed state. On the other hand, as shown by a two-dot chain line in FIG. 1, when the door 12 is rotated 180 ° and hangs down, the door 12 is opened.

  The door 12 is constructed by connecting a plurality of strip-shaped panel members 12a, 12b, and 12c in parallel to each other and forming a planar shape with through bolts 12d. In the standing posture, these panel members are a proximal end panel member 12a disposed at the proximal end portion on the floor 16 side, an intermediate panel member 12b disposed at the intermediate portion, and a distal end portion disposed at the distal end portion of the door 12. It consists of three types of panel members 12c. FIG. 2 shows only one base end panel member 12a arranged along the length direction at one end thereof, that is, the lower end portion of the door 12, and the other intermediate panel member 12b. The front end panel member 12c is omitted. Each panel member is formed of a hollow shape formed by extrusion molding of an aluminum alloy, and has a basic shape in which a pair of flat plates 5 are connected to each other by vertical ribs 6.

The cushion member 15 is provided on the inner side surface of the door 12 in the standing posture so as to have a strip shape along the length direction of the door 12 so as to cover the surface of the lower end portion. Specifically, a pair of groove portions 20 and 20 are formed on the inner surface of the lower end of the base end panel member 12a (the left side surface in FIG. 2) along the length direction of the door 12 so as to be spaced apart from each other. Both side portions of the belt-like cushion member 15 are fitted and attached to both the groove portions 20 and 20.
These cushion members 15 are made of an elastic member such as ethylene propylene rubber (EPDM), for example, and a plurality of protrusions 21 for preventing slippage are formed on the surface in parallel along the length direction. As a material of the cushion member 15, in addition to EPDM, for example, butyl rubber, chloroprene rubber, and the like are suitable from the viewpoint of mechanical strength, weather resistance, and wear resistance. The surface may be coated with fluorine. As its physical properties, for example, the rubber hardness by durometer is 64 to 74 degrees, the tensile strength by JIS K6251 is 13.0 to 15.7 MPa, and the elongation at break is 380 to 460%.

  Moreover, each groove part 20 formed in the base part panel member 12a is formed in the dovetail shape whose internal width dimension is larger than the width dimension of an opening part. On the other hand, at both end portions of the cushion member 15, a protruding portion 24 is formed along the length direction in which a wide portion 23 is integrally formed via a narrow connecting portion 22, and the wide portion 23 of the protruding portion 24 is formed. Is fitted into the groove 20 to prevent it from coming off.

As shown in FIG. 2, the cushion member 15 is provided so as to cover the surface of the cover member 37 attached to the proximal end panel member 12a. The cover member 37 is provided so as to cover the fastening portion 36 made of a bolt and a nut for fixing the base end panel member 12 a and the hinge piece 35 of the hinge member 17. Further, the cover member 37 is provided with a step so as to be a recess with respect to the surface of the base end panel member 12a, and the cushion member 15 is provided so as to fill the step. In this case, the cushion member 15 is provided along the surface of the base end panel member 12a as a whole, but is formed to be thicker than the step between the base end panel member 12a and the cover member 37. The surface is provided to protrude by a height L from the surface of the base end panel member 12a. The protrusion dimension L of the cushion member 15 from the base end panel member 12a includes the height of the ridge 21 and is 1 to 5 mm. Among these, the height of the ridge 21 is preferably about 0.3 to 1 mm. .
Further, the width W of the cushion member 15 is 50 to 90 cm, and the lower edge of the cushion member 15 is disposed in a range in which the height H from the lower end surface 18 of the panel member 12a is 1 to 3 cm in the standing posture of the door 12. It is provided to be.

  A packing 32 is provided at the lower end of the base end panel member 12a. The packing 32 has a protruding portion 34 fitted in the groove 33 of the lower end surface 18 of the panel member 12a, and the tip protrudes from the lower end surface 18 of the panel member 12a. When the door 12 is rotated upright, the packing 32 seals against the floor 16 to prevent leakage of moisture and the like from between the floor 16 and the panel member 12a.

  In the door device 10 configured as described above, when the door 12 is opened (hanging posture) as shown in the two-dot chain line in FIG. 1 and FIG. 2, the door device 10 is provided on the inner surface of the lower end portion of the door 12. The cushion member 15 faces outward at the upper end portion of the door 12 that is hung down. Further, as described above, since the surface of the cushion member 15 protrudes from the surface of the panel member 12a of the door 12, when the unillustrated load is unloaded by the forklift 3, the fork mast 4 is brought into contact with the door as shown in FIG. Even when approaching, the fork mast 4 abuts against the cushion member 15 and can avoid contact with the panel member 12a.

  On the other hand, as shown by the solid line in FIG. 1, when the door 12 is rotated to the closed state (standing posture) via the hinge member 17, the cushion member 15 is disposed at the lower end portion of the inner side surface of the cargo bed 2, and in this case as well, the cushion Since the member 15 protrudes from the surface of the panel member 12 a of the door 12, even when the load on the loading platform 2 comes into contact with the door 12 due to shaking of the transport vehicle 1, the load contacts the cushion member 15 and the panel member. Contact with 12a is prevented, and there is no fear that this panel member 12a will be damaged. Further, since the cushion member 15 is provided so as to fill the step of the base end panel member 12a, damage to the load can be prevented even when the load collides.

  The cushion member 15 has a shape in which the protrusions 24 on both sides thereof are integrally formed with the wide portion 23 via the narrow connecting portion 22, and the groove portion 20 of the panel member 12 a is more than the opening portion. Since the inner width dimension is formed in a dovetail shape, when attaching the cushion member 15 to the panel member 12a, a rivet or a screw is not required, and the cushion member 15 is pushed in as shown by an arrow in FIG. Thus, the protrusion 24 can be attached simply by fitting into the groove 20 of the panel member 12a, which is simple and advantageous in terms of cost reduction and weight reduction.

FIG. 5 shows a second embodiment of the present invention. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the cushion member 15 is set to have a width larger than the interval between the grooves of the panel member 12a, and when attached to the groove, the central portion in the width direction is convex outward. A space portion 40 having a height M1 is formed between the rear surface of the door 12 and the cover member of the door 12 so as to be curved, whereby the projecting dimension from the surface of the panel member 12a is L2. . In this case, the impact force when the fork mast 4 of FIG. 4 comes into contact can be further relaxed by using the elastic force of the material of the cushion member 15 and the elastic force caused by the bending.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, a plurality of protrusions 50 are provided on the back surface of the cushion member 15. Thereby, the space part 40 which consists of height M2 is formed between the cushion member 15 and the cover member of the door 12, and the protrusion dimension from the panel member 12a surface is L3.
In this case as well, an excellent buffering effect can be obtained by using the space 51 to effectively function the elastic force of the cushion member 15.

  FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the cushion member 60 is integrally provided with a packing 61 that abuts against the floor surface of the loading platform 2 when the door 12 is in an upright posture. At this time, the packing 61 is provided on one side portion of the flat plate portion 62 of the cushion member 60, and the protrusion 23 for attachment to the panel member 12a is provided only on the other side portion of the flat plate portion 62. The strip 23 and the protrusion 34 on the back of the packing 61 are fitted in the groove 20 on the surface of the base end panel member 12a and the groove 33 on the lower end surface, respectively, and are attached to different surfaces. Thus, the packing 61 is integrally formed with the cushion member 60 to reduce the number of parts, thereby reducing the cost. By attaching these integrally to the panel member 12a, the number of assembly steps can be reduced.

FIG. 8 shows a fifth embodiment of the present invention. In this embodiment, a nut member 72 is coupled to a bolt 71 that fixes the hinge member 35 to the panel member 12a from the opposite surface of the panel member 12a, and a cushion member 73 is provided so as to directly cover the nut member 72. ing. The cushion member 73 includes a flat plate portion 74 and a packing 75 that are integrally formed, and is attached to the panel member 12 a at two locations of the flat plate portion 74.
Thus, since the nut member 72 is directly covered with the cushion member 73 without providing a cover member, it is possible to contribute to a reduction in the number of parts.

  FIG. 9 shows a sixth embodiment of the present invention. In this embodiment, the packing 75 is integrally formed with the cushion member 80, and the attachment position of the cushion member 80 is increased to three places, with the flat plate portion 81 being two places and the back portion of the packing 75 being one place. Is. Thus, the attachment strength is further increased by increasing the attachment position of the cushion member 80, and the cushion member 80 is provided in a long shape and firmly attached even when the proximal end panel member 18a is in a long shape. Since it can do, it can respond also to a panel member large in the length direction.

  In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Transport vehicle 2 Loading platform 10 Door apparatus 12 Door 12a-12c Panel member 13 Shaft 15 Cushion member 16 Floor 17 Hinge member 20 Groove part 21 Projection 22 Connection part 23 Wide part 24 Projection part 32 Packing 33 Groove 34 Projection part 35 Hinge member 35 Hinge piece 36 Fastening portion 37 Cover member 40 Space portion 50 Projection 51 Space portion 60 Cushion member 61 Packing 62 Flat plate portion 73 Cushion member 74 Flat plate portion 75 Packing 80 Cushion member

Claims (7)

  A door is provided at the side or rear end of the loading platform so as to be rotatable between an upright posture and a downward hanging posture toward the upper side of the floor of the loading platform via a horizontal axis. A belt-like cushion member made of an elastic member covering the surface of the panel member constituting the door is provided along the length direction of the door on the inner side surface of the lower end portion in the standing posture of the door. A door device for a transport vehicle characterized by the above.   The door device for a transport vehicle according to claim 1, wherein at least a part of the cushion member protrudes from a surface of the panel member.   The cushion member is provided to be curved so that a central portion in the width direction is convex outward, and a space portion is formed between a back surface of the cushion member and the panel member. Item 3. A transport vehicle door device according to Item 1 or 2.   The door device for a transport vehicle according to any one of claims 1 to 3, wherein a plurality of protrusions are provided on a back surface of the cushion member.   A packing that abuts against the floor surface of the cargo bed when the door is in the standing posture is provided along the length direction of the door at the lower end in the standing posture of the door, and the packing is integrated with the cushion member. It forms, The door apparatus of the transport vehicle as described in any one of Claims 1-4 characterized by the above-mentioned.   A hinge piece supported by the shaft is fixedly attached to the panel member, and a cover member that covers a fixing portion of the hinge piece is provided, and the cushion member is provided to cover the cover member. The door device for a transport vehicle according to any one of claims 1 to 5, wherein the door device is a transport vehicle.   On both sides of the cushion member, protrusions are formed along the length direction with a wide portion integrally formed through a narrow connecting portion, and the protrusion is fitted to the panel member. 7. A door device for a transport vehicle according to any one of claims 1 to 6, wherein a groove portion having an inner width dimension larger than that of the opening portion is formed in order to prevent it from coming off.

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