Dock shelter

Abstract

To provide a dock shelter having a simple structure showing high durability against an easy breakage feature and capable of increasing airtightness at a connecting part between a load-carrying platform of a truck and a load carrying-in / out doorway at a warehouse.SOLUTION: This invention relates to a dock shelter used at a warehouse formed with a load carrying-in / out doorway to which a rear part of a load-carrying platform of a truck is connected, where there are provided right and left Raptor seals in which at least one of them can be moved and driven in a lateral direction along a vertical direction on both right and left sides of the load carrying-in / out doorway; an electric roll curtain driven so as to lift and lower vertically along the front surfaces of the right and left Raptor seals, installed at the upper part of the load carrying-in / out doorway so as to extend between the right and left Raptor seals in the lateral direction; a protection pad part arranged at the lower part of the load carrying-in / out doorway. The protection pad part is constituted by a deformable pad deformed by being contacted with the rear lower part of the load-carrying platform of the truck and an overlapping sheet installed at the upper part of the deformable pad.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dock shelter arranged at the loading and unloading entrance of a warehouse. [Background technology]

[0002] Conventionally, in air-conditioned warehouses (for example, refrigerated and frozen warehouses), if loading and unloading work (loading and unloading of cargo into and from the warehouse) is carried out with the loading and unloading door open, the conditioned air in the warehouse escapes to the outside and outside air enters the warehouse, making it impossible to maintain a constant temperature inside the warehouse. Therefore, dock shelters are installed on the truck bed and at the loading and unloading door of the warehouse to maintain the air conditioning inside the warehouse during loading and unloading work.

[0003] Dock shelters can fill the gap between the truck bed and the loading / unloading doorway, making the truck bed and the warehouse into one continuous space. In this way, by installing a dock shelter during loading and unloading work, it is possible to prevent outside air from entering the warehouse and the air-conditioned air inside the warehouse from being exhausted to the outside, preventing temperature changes and condensation inside the warehouse and reducing air-conditioning costs (for example, cooling costs in the case of a frozen or refrigerated warehouse).

[0004] Patent Document 1 discloses a dock shelter equipped with a head pad, a side pad, and a bottom pad that are brought into contact with the outer periphery of the truck bed on the opening frame of the loading / unloading doorway. The bottom pad described in Patent Document 1 is composed of multiple airbags, and when the truck bed comes into contact with each pad, the bottom pad deforms along the uneven shape of the outer periphery of the bed, thereby ensuring airtightness inside the dock shelter and disclosing a configuration that can maintain a low temperature inside the dock shelter. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2002-54874 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the dock shelter of the above-mentioned Patent Document 1, since the bottom pad is composed of multiple airbags, even if the rear of the body of the delivery vehicle (truck) has an uneven surface, each airbag can elastically deform along the uneven surface to block the gap that occurs between the truck bed and the loading / unloading doorway of the warehouse. Therefore, the dock shelter of Patent Document 1 is expected to eliminate the gap at the bottom edge of the rear opening of the container (truck bed) and increase the airtightness. However, in the dock shelter of Patent Document 1, the structure of the bottom pad that contacts the bottom edge of the rear opening of the container is complicated, and there is a risk that the airtightness between the dock and the bed will be easily lost if the airbag that constitutes the bottom pad is damaged.

[0007] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a dock shelter that has a simple structure and can increase the airtightness of the connection between the truck bed and the warehouse entrance / exit doorway. [Means for solving the problem]

[0008] A first aspect of the present invention is a warehouse having a cargo loading / unloading doorway to which the rear of a truck bed is connected, the warehouse comprising: left and right raptor seal sections arranged vertically on both the left and right sides of the loading / unloading doorway, at least one of which can be driven to move in the left and right direction; an electric roll curtain section arranged in the left and right direction at the top of the loading / unloading doorway so as to span between the left and right raptor seal sections and driven to rise and fall vertically along the front faces of the left and right raptor seal sections; and a protective pad section arranged at the bottom of the loading / unloading doorway, the protective pad section having a deforming pad that deforms in contact with the rear lower part of the truck bed, and an overlap sheet placed on top of the deforming pad, the overlap sheet being arranged to form two upper and lower sheet bodies, the front ends of which are connected by a connecting member.

[0009] In a second aspect of the present invention, the electric roll curtain unit has a roll curtain section that blocks the area from the upper end of the truck to near the ceiling surface of the loading / unloading doorway, a winding section that winds up and unwinds the roll curtain section, and a shield made of an elastic body that is suspended from the ceiling surface of the loading / unloading doorway and blocks a gap that occurs between the winding section and the ceiling surface of the loading / unloading doorway.

[0010] A third aspect of the present invention is characterized in that the raptor seal portion has a vertical frame at its inner end, and a shield made of an elastic material is arranged at the front and rear ends of the vertical frame from the upper end to the lower end of the vertical frame. Effect of the Invention

[0011] The dock shelter of the present invention is composed of left and right raptor seal parts installed on both the left and right sides of the loading / unloading doorway of the warehouse, an electric roll curtain part installed at the top of the loading / unloading doorway, and a protective pad part installed at the bottom of the loading / unloading doorway. Gaps occurring on the outer periphery top surface and outer periphery side surface of the rear part of the truck bed, and on the connecting part between the rear lower part of the bed and the dock shelter, are shielded by the electric roll curtain part vertically descending and abutting on the outer periphery top surface of the truck bed, on the top side of the bed, and by the left and right raptor seal parts moving in directions approaching each other and abutting on the outer periphery side surface of the bed. The deformable padding that constitutes the protective padding elastically deforms to conform to the uneven shape of the rear lower part of the truck bed to seal the gap, and the two overlap sheets placed on top of the deformable padding are connected by a connecting member and deform into a roughly elliptical shape upon contact with the rear lower part of the bed to seal the gap between the bottom of the loading / unloading doorway and the rear lower part of the truck bed. In other words, according to the present invention, with a simple structure, it is possible to improve the airtightness of the connection between the truck bed and the loading / unloading doorway of the warehouse.

[0012] In addition, the left and right Raptor seal parts are pressed against the outer circumferential side surface of the truck bed with a predetermined pressure, which prevents gaps from being generated between the left and right Raptor seal parts constituting the dock shelter and the outer circumferential side surface or top surface of the bed due to, for example, strong winds, etc., and maintains the airtightness of the connection between the dock shelter and the bed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a side view showing a dock shelter according to one embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view showing a dock shelter according to one embodiment of the present invention. [Diagram 3] FIG. 1 is a front view showing a dock shelter according to one embodiment of the present invention. [Figure 4] FIG. 2 is a schematic plan view showing a raptor seal portion according to one embodiment of the present invention. [Diagram 5] FIG. 4 is a schematic enlarged view showing an impact suppression portion according to an embodiment of the present invention. [Figure 6] 1A and 1B are side views showing an impact suppression portion according to one embodiment of the present invention, in which (a) shows the impact suppression portion in a vertical state, and (b) shows the impact suppression portion in a swung state. [Figure 7] FIG. 1 is a front view showing a dock shelter according to one embodiment of the present invention. [Figure 8] FIG. 2 is a schematic perspective view showing an electric roll curtain unit according to one embodiment of the present invention. [Figure 9] 1A and 1B are diagrams showing a curtain body of an electric roll curtain unit according to one embodiment of the present invention, in which (a) is a front view and (b) is a side view. [Figure 10] 1 is a side view showing a state in which an electric roll curtain unit according to an embodiment of the present invention is in contact with a loading platform. FIG. [Figure 11] FIG. 2 is a perspective view showing a protective pad portion according to an embodiment of the present invention. [Figure 12] 1A and 1B are diagrams showing the relationship between the protective pad portion and the loading platform according to one embodiment of the present invention, in which FIG. 1A shows the state before contact, and FIG. [Figure 13] FIG. 2 is a plan view showing a protective pad portion according to an embodiment of the present invention. [Figure 14] 14A and 14B are diagrams showing the configuration of a rectangular deformable pad according to one embodiment of the present invention, where (a) is a perspective view and (b) is a cross-sectional view taken along line AA in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention relates to a dock shelter 1 that connects the loading platform 3 of a truck 2 and a loading / unloading doorway 40 of a warehouse. By devising the structure of each part, namely the raptor seal part 10, the electric roll curtain part 20, and the protective pad part 30, which are provided on the periphery of the opening of the dock shelter 1, the gap that occurs between the loading / unloading doorway 40 and the opening of the loading platform 3 of the truck 2 is blocked, thereby maintaining the room temperature inside the dock shelter 1 at a low temperature.

[0015] The overall configuration of the dock shelter 1 according to this embodiment will be described with reference to Figs. 1 to 14. Fig. 1 is a side view showing the loading / unloading doorway 40 of the dock shelter 1 in cross section, and Fig. 2 is a plan view thereof. Fig. 3 is a front view showing the raptor seal unit 10 with the loading / unloading doorway 40 of the dock shelter 1 in cross section. Fig. 4 is a plan view showing the state in which the abutting portion 13 of the raptor seal unit 10 is in contact with the outer peripheral side surface of the loading platform 3. Fig. 5 is an enlarged view showing the impact suppression unit 16, and Figs. 6(a) and 6(b) are diagrams showing the swinging state caused by the impact suppression unit 16. Fig. 7 is a front view showing the electric roll curtain unit 20 with the loading / unloading doorway 40 of the dock shelter 1 in cross section. Fig. 8 is a perspective view showing the electric roll curtain unit 20, and Figs. 9(a) and 9(b) are front and side views showing the curtain main body 22b of the roll curtain unit 22. FIG. 10 is a side view showing a state where the roll curtain section 22 contacts the outer periphery top surface of the loading platform 3, with the loading / unloading doorway 40 of the dock shelter 1 in cross section. FIG. 11 is a perspective view showing the protective pad section 30, with the loading / unloading doorway 40 of the dock shelter 1 in cross section. FIG. 12 is a side view showing the state before and after the loading platform 3 contacts the protective pad section 30, with the loading / unloading doorway 40 of the dock shelter 1 in cross section. FIG. 13 is a plan view showing the protective pad section 30, with the loading / unloading doorway 40 of the dock shelter 1 in cross section. FIG. 14(a) is an exploded perspective view showing the structure of the rectangular deformable pad 31B, and FIG. 14(b) is a schematic cross-sectional view showing the rectangular deformable pad 31B installed on the platform 41. Hereinafter, an embodiment of the dock shelter 1 of the present invention will be described with reference to the drawings. In describing this embodiment, the left-right direction in FIG. 2 is the front-rear direction, and the up-down direction is the left-right direction.

[0016] The dock shelter 1 of this embodiment is composed of raptor seal sections 10R, 10L that are installed vertically on the left and right side walls 42R, 42L that constitute the loading / unloading doorway 40 of a refrigerated / freezer warehouse that is air-conditioned to a predetermined temperature and that serve to close the gap between the outer circumferential side surface of the loading platform 3 and the side walls 42R, 42L of the loading / unloading doorway 40, an electric roll curtain section 20 that is provided between the upper ends of the left and right raptor seal sections 10R, 10L and that serves to close the gap between the outer circumferential top surface of the loading platform 3 and the ceiling surface 43 of the loading / unloading doorway 40, and a protect pad section 30 that is installed at the tip of the platform 41 of the loading / unloading doorway 40 and serves to come into contact with the lower rear portion of the loading platform 3 to close the bottom surface of the loading platform 3 and the bottom surface of the dock shelter 1. The dock shelter 1 is provided with an electric roll curtain section 20, raptor seal sections 10R and 10L, and a protective pad section 30, in that order from the front to the rear of the loading / unloading doorway 40.

[0017] The raptor seal parts 10R, 10L abut against the side of the loading platform 3 of the truck 2 to close the gap between the side of the loading platform 3 and the left and right side walls 42R, 42L of the loading / unloading doorway 40. As shown in Figs. 2 and 3, the raptor seal parts 10R, 10L are provided along the vertical direction near the front end of the right side wall 42R and the left side wall 42L of the loading / unloading doorway 40. The left and right raptor seal parts 10R, 10L are identically configured except that the moving direction is symmetrical, so in this embodiment, the configuration will be described using the right raptor seal part 10R as an example. Fig. 3 omits the electric roll curtain part 20 and the protective pad part 30a, and illustrates the left and right side walls 42R, 42L of the loading / unloading doorway 40 and the ceiling surface 43 as cross sections.

[0018] As shown in Figure 3, the Raptor seal section 10R is composed of a shielding curtain 12 that is folded accordion-style and has one end connected and fixed to the right side wall 42R, a vertical frame 11 that is fixed to the other end of the shielding curtain 12, abutment sections 13 provided near the front and rear ends of the vertical frame 11, a drive motor 14 that enables the vertical frame 11 to move toward the center of the loading / unloading doorway 40, and an impact suppression section 16 that suspends the vertical frame 11 on a horizontal guide 15.

[0019] The vertical frame 11 is connected and fixed to the other end of the shielding curtain 12. The vertical frame 11 is formed to have approximately the same vertical length as the shielding curtain 12. The upper end surface 11a of the vertical frame 11 is suspended from a horizontal guide 15 via an impact suppression portion 16.

[0020] The abutment portion 13 is formed to have approximately the same length as the vertical length of the shielding curtain 12, and is connected and fixed to the front and rear ends of the left end surface of the vertical frame 11 (see FIG. 4). The abutment portion 13 is formed of approximately the same material as the shielding curtain 12, and is formed in a loop shape by fixing the start and end of a single sheet body to the vertical frame 11, and has a loop space R inside. The loop shape of the abutment portion 13 is formed to be approximately elliptical, and is provided so that the longitudinal direction of the elliptical shape forms an inclination angle of approximately 45 degrees with respect to the left-right direction in a plan view. In other words, the abutment portion 13 provided near the rear end of the vertical frame 11 has its longitudinal direction (rear side) inclined in a direction approaching the loading / unloading doorway 40, and the abutment portion 13 provided at the front end of the vertical frame 11 is provided so as to be inclined in a direction away from the loading / unloading doorway 40 (front side). In other words, the abutment portion 13 is provided in such a manner that the katakana character “ha” is rotated 90 degrees and the top side of the character “ha” is connected to the vertical frame 11 .

[0021] When the abutment portion 13 configured in this manner abuts against the outer circumferential side surface of the loading platform 3, it forms an enclosed swinging space S with the front and rear abutment portions 13, 13, the vertical frame 11, and the outer circumferential side surface of the loading platform 3. When the raptor seal portions 10R, 10L abut against the outer circumferential side surface of the loading platform 3, the two spaces, the loop space R formed in the abutment portion 13 and the swinging space S, can reliably close the gap between the loading / unloading doorway 40 and the outer circumferential side surface of the loading platform 3. In other words, the abutment portion 13 has a loop space R so that it can easily deform to conform to the shape of the outer circumferential side surface of the loading platform 3 with which it comes into contact. Also, by being provided at the front and rear ends of the vertical frame 11 and forming a swinging space S therebetween, the abutment portion 13 can maintain its tight contact with the outer circumferential side surface of the loading platform 3 even if the vertical frame 11 swings forward and backward due to wind or other factors and the upper and lower ends of the vertical frame 11 come into contact at an angle that shifts forward and backward in plan view, and the loading / unloading doorway 40 can be maintained at a low temperature.

[0022] As shown in Fig. 5 and Fig. 6(a) and (b), the impact suppression unit 16 is composed of a guide roller 16a that moves in the left-right direction on the horizontal guide 15, an upper plate 16b, an upper plate connecting portion 16c, a lower plate 16d, a lower plate connecting portion 16e, a shaft 16f that supports the lower plate 16d so that it can rotate relative to the upper plate 16b, a mounting portion 16g that connects the upper end surface 11a of the vertical frame 11 and the impact suppression unit 16, and a reinforcing plate 16h that reinforces the lower plate 16d and the mounting portion 16g. The guide roller 16a and the upper plate 16b are detachably attached with a bolt B. The impact suppression unit 16 can be removed from the horizontal guide 15 by removing the bolt B from the guide roller 16a. The horizontal guide 15 is provided along the left-right direction on the ceiling surface 43 of the loading / unloading doorway 40.

[0023] The mounting portion 16g is connected to the upper end surface 11a of the vertical frame 11 by, for example, welding or other means. The upper plate 16b and the lower plate 16d are connected to each other through a shaft 16f, with an upper plate connection portion 16c provided at the bottom of the upper plate 16b and a lower plate connection portion 16e provided at the top of the lower plate 16d. At this time, the lower plate 16d is connected to the upper plate 16b so as to be rotatable around the shaft 16f (see Figs. 6(a) and (b)). That is, the upper end surface 11a of the vertical frame 11 of the raptor seal portion 10R, 10L is suspended from a horizontal guide 15 provided on the ceiling surface 43 of the loading / unloading doorway 40 of the warehouse so as to be rotatable in the front-rear direction in a pendulum-like manner around the shaft 16f at the center of the impact suppression portion 16. The shielding curtain 12, vertical frame 11, and abutment portion 13 of the raptor seal portions 10R, 10L are provided at a predetermined height above the floor surface on which the tires of the truck 2 are placed.

[0024] The raptor seals 10R and 10L thus configured can move the impact suppression unit 16 left and right by rotating the timing belt 17 provided on the drive motor 14. That is, the shielding curtain 12 constituting the raptor seals 10R and 10L can press the vertical frame 11 and the front and rear abutment units 13, 13 of the vertical frame 11 against the outer circumferential side of the loading platform 3 by moving the impact suppression unit 16 suspending the vertical frame 11 left and right along the horizontal guide 15, thereby blocking the gap between the loading / unloading doorway 40 and the outer circumferential side of the loading platform 3. The timing belt 17 described in this embodiment is a general timing belt, and has a substantially trapezoidal protrusion on the inner circumferential surface of the belt when viewed from the front, and the protrusion is fitted into a groove provided on the drive motor 14, thereby ensuring synchronization of the rotation of the timing belt 17 with the operation of the drive motor 14.

[0025] 7, the electric roll curtain unit 20 is installed horizontally so as to span between the right side wall 42R and the left side wall 42L of the loading / unloading doorway 40. The electric roll curtain unit 20 is a blocking means for blocking the gap formed between the ceiling surface 43 of the loading / unloading doorway 40 and the outer circumferential upper surface of the loading platform 3. The electric roll curtain unit 20 has a bracket 21 installed at the upper left and right corners of the loading / unloading doorway 40 in front of the horizontal guide 15, a winding unit 23 having a roll curtain unit 22 pivotally supported by the bracket 21, and a ceiling shield 24 that blocks the gap between the winding unit 23 and the loading / unloading doorway 40.

[0026] As shown in FIG. 8, the bracket 21 has a top surface portion 21a fixed to the ceiling surface of the loading / unloading doorway 40, and a side surface portion 21b suspended from either the left or right end of the top surface portion 21a. The bracket 21 is provided with the top surface portion 21a and the side surface portion 21b in a generally inverted "L" shape when viewed from the front. The bracket 21 has the top surface portion 21a fixed to the ceiling surface 43 of the loading / unloading doorway 40, and the side surface portion 21b fixed to the left and right side walls 42R, 42L of the loading / unloading doorway 40. The side surface portion 21b has a support portion 21c drilled in an elliptical shape with the vertical direction as the longitudinal direction at approximately the center in the front-rear direction. The support portions 21c of the left and right brackets 21, 21 rotatably support the roll curtain portion 22 of the winding portion 23.

[0027] The winding section 23 has a roll curtain section 22 and a winding motor 25 that moves the roll curtain section 22 up and down.

[0028] The roll curtain section 22 has a roller shaft section 22a mounted between the support sections 21c, 21c of the left and right brackets 21, and a curtain body 22b having one longitudinal end fixed to the roller shaft section 22a and being wound up and unwound around the roller shaft section 22a in response to the rotation of the roller shaft section 22a.

[0029] The roller shaft portion 22a is formed in a solid cylindrical shape, and is provided in such a manner that either the left or right end protrudes from the left and right support portions 21c, 21c. This protruding end is connected to the winding motor 25. The roller shaft portion 22a can rotate clockwise or counterclockwise with respect to the axis C direction of the roller shaft portion 22a by driving the winding motor 25. In this embodiment, the right direction with respect to the axis C direction of the roller shaft portion 22a is the unwinding direction of the curtain body 22b, and the left direction is the winding direction of the curtain body 22b. Note that the winding and unwinding direction of the curtain body 22b is not limited to this direction, and may be configured so that the right direction with respect to the axis C direction of the roller shaft portion 22a is the winding direction and the left direction is the unwinding direction.

[0030] As shown in Fig. 9, the curtain body 22b has a sheet body 22d that is substantially rectangular in front view, and a bag portion 22h that is provided across the left and right ends of the sheet body 22d in a direction perpendicular to the longitudinal direction of the sheet body 22d. A plurality of bag portions 22h are provided along the longitudinal direction of the sheet body 22d, and a storage space P is formed that is closed by the sheet body 22d and the bag portion 22h. The sheet body 22d has slits S1 and S2 at the lower end. The slit S1 corresponds to the width of the bed 3 of a 10-ton truck 2, and the slit S2 corresponds to the width of the bed 3 of a 4-ton truck 2.

[0031] The bag portions 22h are provided so that the interval between adjacent bag portions 22h gradually increases from the base end portion fixed to the roller shaft portion 22a to the tip end portion contacting the upper surface of the loading platform 3. In other words, the interval between adjacent storage spaces P is provided so that the tip end (lower end portion) side of the curtain main body 22b is the widest and the base end (upper end portion) side of the curtain main body 22b is the narrowest. Each storage space P contains a SUS (stainless steel) plate body b having approximately the same area as the storage space P and a constant thickness.

[0032] Above the slits S1 and S2 provided in the seat body 22d, square pipes 22e are provided extending in the left-right direction to the vicinity of the left and right ends. The square pipes 22e are formed in a square tube shape in a cross-sectional side view. The square pipes 22e are provided in parallel at a certain distance in the up-down direction. The square pipes 22e are provided at the same height on the front and rear surfaces of the seat body 22d. In other words, two square pipes 22e are provided in parallel at the top and bottom near the lower end of the front side of the seat body 22d, and two square pipes 22e are provided in parallel at the top and bottom near the lower end of the rear side of the seat body 22d, for a total of four square pipes provided on the front and rear surfaces of the seat body 22d.

[0033] Of the four square pipes 22e arranged vertically in parallel, the lower square pipe 22e has a slat 22f extending horizontally from the lower surface at approximately the center in the left-right direction. The slat 22f is formed in a rectangular plate shape with a certain thickness. The slat 22f provided on the front side of the seat main body 22d extends forward, and the slat 22f provided on the rear side of the seat main body 22d extends backward.

[0034] In addition, a limit switch 22g is disposed on the upper surface of the square pipe 22e provided on the rear side of the sheet body 22d. The limit switch 22g is formed in a substantially box shape, and has a control switch for controlling the operation of the winding motor 25 in the center of the upper surface. The limit switch 22g detects the approach of the upper and lower square pipes 22e when the control switch is pressed from above. That is, in this embodiment, the limit switch 22g can detect that the lower square pipe 22e provided on the rear side of the sheet body 22d of the curtain body 22b has come into contact with the outer periphery of the loading platform 3. As shown in FIG. 10, when the control switch provided on the limit switch 22g is pressed, the winding unit 23 stops driving the winding motor 25 and stops the rotation of the roller shaft portion 22a. This stops the downward displacement of the curtain body 22b.

[0035] As shown in Fig. 8 and Fig. 9(a) and (b), the ceiling shield 24 is provided between the left and right brackets 21, 21, and is hung from the ceiling surface 43 behind the top surface portion 21a. The ceiling shield 24 is made of an elastic member. The ceiling shield 24 has a fixed portion 24a fixed to the ceiling surface 43, a support portion 24b hung from the front end of the fixed portion 24a, and a shielding portion 24c that extends obliquely from the lower end of the support portion 24b toward the outer circumferential surface of the curtain main body 22b constituting the winding portion 23 and has its tip abutting against the outer circumferential surface of the curtain main body 22b stored in a roll shape. In other words, the ceiling shield 24 is always abutting against the outer circumferential surface of the curtain main body 22b, whether the curtain main body 22b is wound up by the winding portion 23 or unwound from the winding portion 23.

[0036] As shown in Figs. 7 and 8, the motorized roll curtain unit 20 has left and right guide rails 27R, 27L provided vertically along the left and right side walls 42R, 42L.

[0037] The left and right guide rails 27R, 27L each have a front surface 27a, a rear surface 27b disposed opposite the front surface 27a, and a fixed surface 27c connecting one end of the front surface 27a and the rear surface 27b. Each surface is formed in a rectangular plate shape having a certain thickness. The left and right guide rails 27R, 27L are formed in a substantially U-shape in plan view by the front surface 27a, the rear surface 27b, and the fixed surface 27c.

[0038] Near the lower end of front surface portion 27a and rear surface portion 27b, there are fixing holes 27d formed penetrating in the front-rear direction. Front surface portion 27a and rear surface portion 27b have fixing wire 28 inserted and fixed through fixing holes 27d. Fixing wire 28 is folded in two, and has bent portion 28a corresponding to the apex of the folded wire, and bifurcated tip portions 28b, 28b corresponding to the tip portions of the folded wire.

[0039] The fixing wire 28 has its bent portion 28a inserted into the fixing hole 27d of the rear surface portion 27b, and its two forked tip portions 28b, 28b inserted into the fixing hole 27d of the front surface portion 27a. After being inserted into the fixing hole 27d of the front surface portion 27a, the fixing wire 28 is bent in a direction such that the tip portions are separated from each other.

[0040] The front surface 27a and the fixed surface 27c constituting the guide rails 27R and 27L are connected by a spring-type hinge 29. The hinge 29 keeps the relative positional relationship between the two slats 29c, 29c constituting the hinge 29 within a range of 0 to 90 degrees by a coil spring 29b attached to a core rod 29a formed in a cylindrical shape. That is, in this embodiment, the configuration in which the front surface 27a and the fixed surface 27c are connected by the hinge 29 restricts the relationship between the two slats 29c, 29c from exceeding 90 degrees. In other words, the left and right guide rails 27R and 27L always maintain a U-shaped state in a plan view by the hinge 29. As a result, the left and right guide rails 27R and 27L can function as a lifting and lowering guide when the curtain main body 22b of the winding section 23 is lifted and lowered. When the curtain body 22b moves up and down along the left and right guide rails 27R, 27L, both ends of the four square pipes 22e provided on the front and rear surfaces of the sheet body 22d move up and down in the space surrounded by the front portion 27a, the rear portion 27b, and the fixed surface portion 27c, allowing the curtain body 22b to move up and down while maintaining a vertical state.

[0041] As shown in FIG. 8, the front portion 27a of the left and right guide rails 27R, 27L is connected to the fixed surface portion 27c by the hinge 29, so that the front portion 27a can be rotated forward around the hinge 29. With this configuration, even when the truck 2 moves forward with the curtain body 22b in contact with the upper surface portion of the loading platform 3, damage to the left and right guide rails 27R, 27L and the curtain body 22b can be prevented. That is, even if the lower end of the curtain body 22b moves forward following the forward movement of the truck 2, the square pipe 22e attached to the sheet body 22d in front of the curtain body 22b pushes the front portions 27a, 27a of the left and right guide rails 27R, 27L forward, so that the front portions 27a, 27a rotate forward around the coil spring 29b. This opens the front portions of the left and right guide rails 27R, 27L, and allows the curtain body 22b to move forward. When the forward pressing force from the square pipe 22e is released, the opened front surface 27a can return to its original state perpendicular to the fixed surface 27c due to the biasing force of the coil spring 29b that constitutes the hinge 29. In this way, even if the worker mistakenly moves the truck 2 forward when the dock shelter 1 and the outer circumferential top surface of the loading platform 3 are in contact with each other to block the loading / unloading doorway 40, the risk of damage to the left and right guide rails 27R, 27L can be reduced as much as possible.

[0042] As shown in Fig. 11, the protective pad section 30 is composed of a deformable pad 31 for absorbing impact when the rear end surface of the loading platform 3 comes into contact with the protective pad 31, and an overlap sheet 32 ​​placed on the top of the deformable pad 31. The deformable pad 31 is covered with a pad protection sheet 37. The deformable pad 31 has two types of rectangular deformable pads 31A and 31B of different sizes, which are substantially rectangular in cross-sectional side view. The two types of rectangular deformable pads 31A and 31B of different sizes are alternately arranged in the left-right direction at the front end of the platform 41. The rectangular deformable pads 31A and 31B are preferably made of a material such as hard urethane.

[0043] As shown in Figures 14(a) and (b), the rectangular deformable pad 31B has an impact absorbing body 31a formed in the shape of a square box with an open rear face, a hard rubber body 31b stored in the impact absorbing body 31a, and a blocking body 31c that blocks the opening of the impact absorbing body 31a after the hard rubber body 31b is stored in the impact absorbing body 31a.

[0044] The shock absorbing body 31a is formed by connecting cushioning bodies 31d made of hard urethane, which are formed into a rectangular plate shape having a certain thickness, to form a box shape. The shock absorbing body 31a has a storage section 31e surrounded by the cushioning bodies 31d, and the hard rubber body 31b is stored in the storage section 31e.

[0045] The hard rubber body 31b is formed in a rectangular parallelepiped shape with approximately the same volume as the storage section 31e. The hard rubber body 31b is made of an elastic body with higher rigidity than the buffer body 31d. A swing restriction piece 31f connected and fixed to the blocking body 31c is interposed between the upper and lower surfaces of the hard rubber body 31b and the top and bottom surfaces of the storage section 31e.

[0046] The blocking body 31c is formed in substantially the same shape as the buffer body 31d, and is formed in a plate shape of a substantially rectangular shape with a certain thickness. The blocking body 31c is a metal plate. The blocking body 31c is provided so as to block the opening of the shock absorbing body 31a after the hard rubber body 31b is stored in the storage section 31e. The blocking body 31c has swing restriction pieces 31f connected to the upper and lower ends.

[0047] The rocking restriction piece 31f has a rocking restriction portion 31g that contacts the hard rubber body 31b to restrict the rocking of the hard rubber body 31b, and a connecting portion 31h for fixing to the blocking body 31c. The rocking restriction piece 31f is formed into a substantially L-shape in side view by the rocking restriction portion 31g and the connecting portion 31h. The rocking restriction portion 31g and the connecting portion 31h are formed into a flat plate shape having a certain thickness. The rocking restriction portion 31g is formed so that its left-right width is substantially the same as that of the hard rubber body 31b, and its front-rear width is substantially the same as that of the hard rubber body 31b. In other words, the left-right width of the rocking restriction portion 31g and the left-right width of the storage portion 31e of the shock absorbing body 31a are formed so as to be substantially the same.

[0048] In this way, the rectangular deformable pad 31B absorbs the impact when the lower rear part of the cargo bed 3 collides, by using the impact absorbing body 31a, and the hard rubber body 31b and swing restriction piece 31f stored in the storage section 31e of the impact absorbing body 31a, and also prevents the truck 2 from contacting the platform 41 due to the high rigidity of the hard rubber body 31b.

[0049] As shown in FIG. 13, the deformable pad 31 is arranged at the front end of the platform 41 with two rectangular deformable pads 31A and 31B of different sizes arranged alternately in the width direction of the loading platform 3. The rectangular deformable pad 31A is longer in the front-rear width than the rectangular deformable pad 31B. As a result, the protective pad section 30 is provided in an uneven shape in the front-rear direction of the loading platform 3 in a plan view. In this embodiment, the rectangular deformable pads 31A and 31B are supported at the rear side lower surface by the frame 34. However, the supporting manner of the deformable pad 31 is not limited to this, and may be configured to be supported by a supporting metal fitting provided at the front end of the platform 41.

[0050] A square pipe 38 is attached to the lower tip of the platform 41 via an L-shaped steel 36. In other words, the deformable pad 31 is installed so that it comes into contact with the front end surface of the platform 41 and the front surface of the square pipe 38. This increases the contact area between the tip surface of the platform 41 and the rear end surface of the deformable pad 31, and allows the tip surface of the platform 41 to fully absorb the impact that occurs on the deformable pad 31 when the lower edge of the loading platform 3 comes into contact with the deformable pad 31.

[0051] 12(a) and 12(b), the rectangular deformable pad 31A is made of an elastic body so that it can be crushed and elastically deformed by contact with the rear lower part of the bed 3 of the truck 2. As shown in FIG. 12(b), the rectangular deformable pad 31A transforms to fit the uneven shape of the rear lower part of the bed 3, and blocks the gap between the rear lower part of the bed 3 and the deformable pad 31. At this time, the overlap sheet 32, which is placed in an overlapping state on the upper surface of the deformable pad 31 and has a tip portion fixed to the hinge 33, moves back when the hinge 33 comes into contact with the rear lower part of the bed 3, and the slats 33a, 33a constituting the hinge 33 expand in the vertical direction around the core rod 33b of the hinge 33 in the direction in which they separate vertically, so that the overlap sheet 32 ​​can transform into a substantially elliptical shape with the vertical direction as its major axis.

[0052] The overlap sheet 32 ​​is provided so as to overlap the upper surface of the deformable pad 31. The overlap sheet 32 ​​has a rear end fixed to a fixing portion 35 provided on the rear upper surface of the deformable pad 31 by a fixing means such as a screw. The overlap sheet 32 ​​also has a tip portion fixed to upper and lower blades 33a, 33a of the hinge 33. In other words, the overlap sheet 32 ​​is provided so that the upper and lower overlap sheets 32 overlap each other form a loop shape by the fixing portion 35 at the rear end and the hinge 33. When the rear lower edge of the cargo bed 3 comes into contact with the core rod 33b that constitutes the hinge 33, the core rod 33b of the hinge 33 retracts, causing the upper and lower overlap sheets 32 to retract while being expanded vertically by the slats 33a, 33a of the hinge 33, increasing the contact area between the rear lower edge of the cargo bed 3 and the overlap sheets 32, 32 that have expanded vertically, thereby improving the airtightness at the bottom of the connection between the dock shelter 1 and the cargo bed 3.

[0053] As described above, the tip ends of the two overlapping overlap sheets 32 are connected to the slats 33a, 33a of the hinge 33, and the core rod 33b of the hinge 33 is placed on the deformable pad 31 in a manner such that it protrudes slightly forward from the tip end of the rectangular deformable pad 31A.When the lower rear part of the cargo bed 3 comes into contact with the deformable pad 31, the two overlap sheets 32 transform into an approximately elliptical shape with the long axis in the vertical direction due to the expanding action centered on the core rod 33b of the slats 33a, 33a of the hinge 33, thereby expanding the contact area with the lower rear part of the cargo bed 3, thereby reliably blocking the lower rear part of the cargo bed 3.

[0054] In this way, the dock shelter 1 described in this embodiment is configured with raptor seal portions 10 (10R, 10L) on the side walls 42R, 42L of the loading / unloading doorway 40 that abut against the outer peripheral side of the loading platform 3, thereby reliably sealing the gap between the outer peripheral side of the loading / unloading platform 3 and the side walls 42R, 42L of the loading / unloading doorway 40.

[0055] In addition, by providing a contact portion 13 near the front and rear ends of the opposing left and right vertical frames 11, 11 of the raptor seal portion 10 (10R, 10L) at an angle of approximately 45 degrees relative to a plane perpendicular to the side walls 42R, 42L, even if the loading platform 3 stops at an angle relative to the platform 41 of the loading / unloading doorway 40, or even if the raptor seal portions 10R, 10L swing in the fore-and-aft direction relative to the outer peripheral side of the loading platform 3 due to wind or the like, causing the positions of the upper and lower ends of the raptor seal portions 10R, 10L to shift in the fore-and-aft direction, the risk of the contact portion 13 moving away from the outer peripheral side of the loading platform 3 is reduced as much as possible, and the gap between the outer peripheral side of the loading platform 3 and the side walls 42R, 42L of the loading / unloading doorway 40 can be kept closed.

[0056] In addition, by mounting the left and right raptor seal portions 10R, 10L with the impact suppression portion 16 so that the vertical frame 11 can swing back and forth, even if a worker mistakenly moves the truck 2 forward or backward with the left and right raptor seal portions 10R, 10L in contact with the outer circumferential side of the cargo bed 3, the shaft 16f of the impact suppression portion 16 causes the vertical frame 11 to swing back and forth, thereby providing a highly durable dock shelter 1 that is not easily damaged.

[0057] In addition, the left and right raptor seal parts 10R, 10L in this embodiment are configured to press the contact part 13 of the vertical frame 11 against the outer circumferential side of the bed 3 of the truck 2 with a predetermined pressure. That is, even after the contact part 13 of the vertical frame 11 and the outer circumferential side of the bed 3 of the truck 2 come into contact with each other, the drive motor 14 drives the contact part 13 of the vertical frame 11 in a direction to press the contact part 13 of the vertical frame 11 against the outer circumferential side of the bed 3 with a predetermined pressure (for example, 5 kg). For this reason, it is possible to prevent the occurrence of gaps or the like between the left and right raptor seal parts 10R, 10L constituting the dock shelter 1 and the outer circumferential side of the bed 3 of the truck 2 due to, for example, strong winds, etc., and it is possible to provide a dock shelter 1 that can maintain stable airtightness at the connection part with the loading / unloading doorway 40 of the warehouse.

[0058] In addition, the dock shelter 1 is configured with an electric roll curtain section 20 on the ceiling surface 43 of the loading / unloading doorway 40, so that the gap between the outer top surface of the loading platform 3 and the ceiling surface 43 of the loading / unloading doorway 40 can be reliably blocked.

[0059] In addition, two square pipes 22e are arranged parallel to each other above and below near the lower end of the curtain body 22b of the electric roll curtain unit 20, and a limit switch 22g is arranged on the upper surface of the lower square pipe 22e, so that the curtain body 22b can reliably close the ceiling surface 43 and the outer circumferential top surface of the loading platform 3. In other words, when the square pipe 22e provided on the lower side comes into contact with the outer circumferential top surface of the loading platform 3, the downward displacement of the curtain body 22b is restricted. After that, when the winding motor 25 is further driven to move the curtain body 22b downward, the upper square pipe 22e approaches the lower square pipe 22e, and finally the limit switch 22g is pressed by the lower surface of the upper square pipe 22e, and the driving of the winding motor 25 is stopped. In this way, by providing two parallel square pipes 22e above and below near the lower end of the curtain body 22b and providing a limit switch 22g on the upper surface of the lower square pipe 22e, the outer peripheral top surface of the loading platform 3 and the ceiling surface 43 of the loading / unloading doorway 40 can be reliably blocked.

[0060] In addition, by storing SUS (stainless steel) plate bodies b in each storage space P of the curtain body 22b, when the curtain body 22b closes the outer circumferential top surface of the loading platform 3 and the ceiling surface 43, even if the curtain body 22b is blown by wind or the like, the adjacent plates b arranged vertically interfere with each other when the curtain body 22b swings in the front-rear direction, thereby restricting the front-rear swing of the curtain body 22b. In addition, the curtain body 22b presses against the outer circumferential top surface of the loading platform 3 by the weight of the plates b, thereby minimizing the possibility of swinging back and forth due to wind or the like.

[0061] In addition, by hanging the ceiling shield 24 from the ceiling surface 43 behind the bracket 21 of the electric roll-up curtain unit 20 and abutting the tip of the shielding section 24c provided at the bottom of the ceiling shield 24 against the outer peripheral surface of the curtain main body 22b stored in the winding section 23, the gap between the outer peripheral surface of the curtain main body 22b stored in the winding section 23 and the ceiling surface 43 of the entrance / exit doorway 40 can be reliably blocked.

[0062] In addition, in the electric roll curtain section 20, the left and right guide rails 27 are provided vertically on the left and right side walls 42R, 42L of the loading / unloading doorway 40, thereby minimizing the risk of the curtain body 22b swinging back and forth when raised and lowered, and the slats 22f, 22f extending horizontally from the lower square pipes 22e, 22e provided on the front and rear surfaces of the sheet body 22d of the curtain body 22b can contact the ceiling surface of the loading platform 3 while maintaining a horizontal state. This ensures that the gap between the ceiling surface 43 and the outer circumferential top surface of the loading platform 3 can be closed reliably.

[0063] In addition, because the front surface 27a and the fixed surface 27c of the left and right guide rails 27 are connected by the spring-type hinge 29, even if an operator mistakenly moves the truck 2 forward with the curtain body 22b in contact with the outer periphery top surface of the loading platform 3 and the front surface 27a of the guide rail 27 is pressed against the biasing force of the spring 29b by the left and right ends of the square pipe 22e, the front surface 27a rotates around the hinge 29, so there is no risk of the connection between the fixed surface 27c and the front surface 27a being destroyed. In addition, when the engagement state between the outer periphery top surface of the loading platform 3 and the curtain body 22b is released, the front surface 27a that has rotated forward can easily return to the "U" shape in a plan view by the biasing force of the spring 29b. A fixing wire 28 is provided near the lower end of the left and right guide rails 27, 27, and when the front surface portion 27a rotates forward around the hinge 29, the bifurcated tip portion 28b of this fixing wire 28 comes out of the fixing hole portion 27d of the front surface portion 27a. This makes it possible to easily notify an operator that there is an abnormality in the electric roller curtain portion 20.

[0064] In addition, the dock shelter 1 is configured with the protective pad section 30 at the front end of the platform 41 of the loading / unloading doorway 40, so that when the rear lower part of the loading platform 3 of the truck 2 comes into contact with the deformable pad 31 of the protective pad section 30, the two overlap sheets 32 superimposed on the upper surface of the deformable pad 31 expand into an ellipse with the major axis in the vertical direction, increasing the contact area with the rear lower part of the loading platform 3. This ensures that the gap between the rear lower part of the loading platform 3 and the front end of the platform 41 is closed reliably.

[0065] In addition, since the front ends of the two overlap sheets 32 are connected by the slats 33a, 33a of the hinge 33, the first contact point between the rear lower part of the cargo bed 3 and the protective pad part 30 becomes the core rod 33b of the hinge 33, which minimizes the risk of the overlap sheet 32 ​​getting caught between the rear lower part of the cargo bed 3 and the deformable pad 31 and prevents the overlap sheet 32 ​​from becoming tattered.

[0066] In addition, by configuring the protective pad section 30 with two different sized deformable pads 31 (rectangular deformable pads 31A, 31B), it is possible to prevent parts protruding rearward from the rear end of the cargo bed 3 (tail lights, buffer bodies, etc.) from coming into contact with the deformable pad 31, and it is possible to prevent parts protruding from the rear end of the cargo bed 3 from coming into contact with the deformable pad 31 and being damaged.

[0067] Although one embodiment of the present invention has been described, the above description is merely an example of the present invention, and the present invention is not limited to the above-described embodiment. Therefore, even if the embodiment is different from the above-described embodiment, various modifications can be made depending on the design, etc., as long as they do not deviate from the technical concept of the present invention. [Explanation of symbols]

[0068] 1. Dock Shelter 2 Track 3 Cargo platform 10R, 10L Raptor seal part 11 Vertical Frame 12. Screening Curtains 13 Contact part 20 Electric Roll Curtain Section 21 Bracket 22 Roller Curtain Section 22b Curtain body 22e square pipe 22f slats 23 Winding section 24 Ceiling shield 27 Guide rail 28 Fixed wire 28a bending part 29 Hinge 30 Protective pad 31 Deformed Putt 31A, 31B Rectangular deformed pad 32 overlap sheet 33 Hinge 33a Slats 33b core rod 40 Loading / unloading entrance 41 Platform 42R, 42L side wall 43 Ceiling surface P Storage space b Plate

Claims

1. In a warehouse with a loading and unloading doorway to which the rear of a truck bed can be connected, Left and right raptor seal units are provided on both left and right sides of the loading / unloading doorway in a vertical direction, at least one of which is movable in the left and right direction; An electric roll curtain unit that is disposed in the upper portion of the loading / unloading doorway along the left-right direction so as to span between the left and right raptor seal portions and is driven to move up and down vertically along the front surfaces of the left and right raptor seal portions; A protective pad portion provided at a lower portion of the loading / unloading doorway, The protective pad portion includes a deformable pad portion that is deformed by contacting the rear lower portion of the truck bed, An overlap sheet placed on the upper part of the deformed pad portion; having The overlap sheet is The two sheets are arranged so that they overlap each other, The front ends are connected by a connecting member. A distinctive dock shelter.

2. The electric roll curtain unit includes: A roll curtain portion that closes an area from an upper end of the truck to a vicinity of a ceiling surface of the loading / unloading doorway; A winding unit that winds and unwinds the roll curtain unit; a ceiling shielding body made of an elastic body that is suspended from a ceiling surface of the loading / unloading doorway and closes a gap that occurs between the winding section and the ceiling surface of the loading / unloading doorway; 2. The dock shelter according to claim 1, further comprising:

3. A dock shelter as described in claim 1 or claim 2, characterized in that the raptor seal portion has a vertical frame at its inner end, and a shield made of an elastic material is arranged at the front and rear ends of the vertical frame from the upper end to the lower end of the vertical frame.

Images