JP5498834B2 - Refrigeration car door - Google Patents

Description

The present invention relates to an open / close door for a refrigerator car that is configured by providing three doors that can be opened and closed in the vehicle width direction.

  For example, a freezer in a rectangular box shape is mounted on a loading platform of a freezer car, and a low-temperature product such as frozen food is stored in the freezer while maintaining a predetermined low-temperature state. At least the rear surface of the freezer has an opening for taking in and out the luggage, and the opening is opened and closed by two left and right double doors.

  By the way, if the door is opened and closed frequently each time a low temperature product is put in and out of a freezer, the cold air in the freezer escapes and the temperature inside the refrigerator rises, leading to poor quality of low temperature products and deterioration of fuel consumption due to operation of the refrigerator. End up.

  Therefore, for example, Patent Document 1 proposes a configuration as shown in FIGS.

That is, FIG. 5 is a rear view of the freezer of a conventional refrigeration vehicles door, FIG. 6 is a sectional view taken along line C-C in FIG. 5, the opening of the freezer 101 can be opened and closed which is provided in the vehicle width direction It is configured to be opened and closed by three doors 103, 104 and 105. Here, the central middle door 104 is supported by the right door 105 so as to be openable and closable by three hinges 108 arranged in the vertical direction, and is locked to the widthwise center of the outer surface of the middle door 104 and the right gate pillar 102A. As means, door holders 106 and 107 that are engaged and disengaged with each other are attached.

  Therefore, if only the central middle door 104 is opened / closed for putting in / out of small articles, the opening / closing area of the opening is limited to be small, so that the rise in the internal temperature can be suppressed. When the middle door 104 is rotated about 180 ° about the hinge 108 to be fully opened as shown by a chain line in FIG. 6, the door holder 106 attached to the middle door 104 is moved to the right gate pillar 102A. In order to engage with the attached door holder 107, the fully open state of the middle door 104 is maintained. When closing the middle door 104 held in the fully opened state, if the middle door 104 is pulled as it is, the engagement between the door holders 106 and 107 is released, and the middle door 104 is rotated around the hinge 108. You can move it to close it.

JP 2004-011286 A

  However, in the configuration proposed in Patent Document 1, since the door holders 106 and 107 are attached to the outer surface of the middle door 104 and the right gate pillar 102A, respectively, these attachment portions need to be reinforced, and both the door holders 106 and 107 are attached. Therefore, there is a problem that the degree of engagement between the two is affected by the mounting accuracy of the inner door 104.

The present invention has been made in view of the above-mentioned problems. The purpose of the present invention is that the reinforcement of the inner door is unnecessary and the engagement between the engaging member and the receiving member constituting the locking means is the dimensional accuracy of the inner door. Another object of the present invention is to provide an open / close door for a refrigerating vehicle that is performed well without being affected by the mounting accuracy and in which the fully opened state of the middle door is securely locked.

In order to achieve the above object, the invention described in claim 1 is provided with three doors that can be opened and closed , each having a laminated structure including two face members and a heat insulating plate sandwiched between the two face members. A refrigeration system provided in the width direction, with a central inner door supported by a hinge so that it can be opened and closed on either the left or right door, and provided with a lock means that rotates only the inner door approximately 180 ° and holds it in a fully open state. In a vehicle opening / closing door, the locking means is composed of an engaging member and a receiving member that engage and disengage with each other by opening and closing the middle door, and the engaging member is provided on a hinge that supports the middle door, and the hinge is attached to the outside of the door In addition to being provided on the surface, the receiving member is provided on the outer surface of one of the left and right doors that support the middle door.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the engaging member is constituted by a leaf spring, and a resin collar that rotates when the leaf spring is engaged is provided on the receiving member. To do.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the fixing portions of the hinge provided with the engaging member and the receiving member are pulled in the left-right direction from the center in the vertical direction of the hinge. Further, the hinges are arranged at symmetrical positions with respect to the center line in the vertical direction of the hinge.

  According to the first aspect of the present invention, since the engaging member constituting the locking means is provided on the hinge that supports the inner door, it is not necessary to reinforce the attachment portion of the engaging member to the inner door. In addition, since the receiving member constituting the locking means is provided on either the left or right door adjacent to the inner door, the distance between the receiving member and the engaging member is reduced, and the engagement between the two is determined by the dimensional accuracy of the inner door. It is performed well without being affected by the mounting accuracy, and the fully opened state of the inner door is securely locked.

  According to the second aspect of the present invention, when the leaf spring as the engaging member is engaged with the receiving member, the resin collar provided on the receiving member is rotated by the engagement friction. And unlocking smoothly, and the operation sound is kept low.

  According to the third aspect of the present invention, since the fixing portions of the hinge provided with the engaging member and the receiving member are arranged in a vertically symmetrical position with respect to the center line in the vertical direction of the hinge, the hinge is opened and closed by opening and closing the middle door. The force acting on the receiving member is evenly distributed at each fixing location, and the attachment strength between the hinge and the receiving member is increased.

It is a rear view of the freezer which shows the opening-and-closing door for freezer cars concerning the present invention. It is the A section enlarged detail drawing of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a figure similar to FIG. 3 which shows the state which opened the inner door of the refrigerator door which concerns on this invention. It is a rear view of the freezer which shows the conventional open / close door for freezer cars . It is CC sectional view taken on the line of FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a rear view of a refrigerator showing a refrigerated vehicle for opening and closing a door according to the present invention, FIG. 2 A section enlarged detail of Figure 1, Figure 3 is sectional view taken along line B-B of FIG. 2, FIG. 4 is Chutobira It is a figure similar to FIG. 3 which shows the state which opened.

In FIG. 1, reference numeral 1 denotes a rectangular box-shaped freezer (container) mounted on a loading platform of a freezer truck (not shown), in which a low-temperature product (not shown) such as frozen food holds a predetermined low-temperature state. It is stored in a state. A rectangular opening (not shown) for taking in and out the low-temperature product is formed on the rear surface of the freezer 1 (front surface in FIG. 1), and this opening is used for the freezer car according to the present invention. Opened and closed by the door. The peripheral edge of the opening on the rear surface of the freezer 1 is bordered by a rectangular frame 2.

The open / close door for a refrigerator according to the present invention is configured by providing three doors 3, 4, 5 that can be opened / closed in the vehicle width direction, and the left door 3 has its left end edge arranged in the vertical direction. The right door 5 is supported on the left vertical frame 2A of the frame 2 by three hinges 6 so as to be openable and closable, and the right door 5 has a right edge of the vertical frame 2B on the right side of the frame 2 by three hinges 7 arranged in the vertical direction. It is supported so that it can be opened and closed. The central inner door 4 is supported by the left end edge of the right door 5 so that it can be opened and closed by three hinges 8 whose right end edges are arranged in the vertical direction. In addition, between the upper and lower horizontal frames 2C and 2D of the frame 2, lock bars 9, 10, and 11 are installed in the vertical direction to prevent the three doors 3, 4, and 5 from opening.

  Here, as shown in FIG. 3 (only the middle door 4 and the right door 5 are shown in FIG. 3), the doors 3 to 5 have both sides of the heat insulating plate 12 such as foamed urethane or polystyrene foam having high heat insulation properties. A thin inner plate 13 and an outer plate 14 made of a metal such as SUS or the like are sandwiched in a sandwich shape, and a mold 15 is fitted around the sandwiched inner plate 13 and outer plate 14.

  FIG. 2 and FIG. 3 show details of the top of the hinges 8 that support the middle door 4 on the right door 5 so that it can be opened and closed. The hinges 8 are arranged vertically at the left end of the outer surface of the right door 5. A hinge bracket 8A attached by a bolt 16 and a hinge arm 8C having one end rotatably supported by a hinge shaft 8B on the hinge bracket 8A. The hinge arm 8C includes a total of three hinge arms 8C. The bolt 17 is attached to the right end portion of the outer surface of the middle door 4.

  A leaf spring 18 as an engaging member and a cylindrical stopper 19 are attached to the outer surface of the hinge arm 8C. Here, the leaf spring 18 is formed with a corrugated engagement portion 18a.

  On the other hand, a receiving member is located beside the hinge bracket 8A attached to the outer surface of the right door 5 (a position where the engaging portion 18a of the leaf spring 18 is engaged when the middle door 4 is fully opened as will be described later). 20 is attached. This receiving member 20 has a metal shaft 22 as an engaged portion vertically installed between L-shaped upper and lower brackets 20A attached to the outer surface of the right door 5 by two screws 21 each. A resin collar 23 is rotatably passed through the shaft 22.

  Here, in the present embodiment, as shown in FIG. 2, the fixing position of the hinge arm 3C of the hinge 8 to the middle door 4 by the three bolts 17 and the right by the upper and lower two bolts 16 of the hinge bracket 8A. The fixing part to the door 5 and the fixing part to the right door 5 by the two screws 21 of the upper and lower brackets 20 </ b> A of the receiving member 20 are arranged at symmetrical positions with respect to the center line N in the vertical direction of the hinge 8. ing.

In the freezer having the open / close door for a freezer car according to the present invention configured as described above, the small articles are put in and out by opening and closing only the central middle door 4. That is, after operating the lock bar 10 to unlock the middle door 4, the middle door 4 is rotated about 180 ° in the direction of the arrow in FIG. For example, the stopper 19 attached to the hinge arm 8C on the side of the inner door 4 abuts on the resin cover 25 covered by the bracket 24 that supports the lock bar 11, and further opening of the inner door 4 is restricted. At the same time, the engaging portion 18a of the leaf spring 18 attached to the hinge arm 8C is engaged with the resin collar 23 of the receiving member 20 attached to the right door 5, so that the fully opened state of the inner door 4 is locked. Thus, when the engaging portion 18a of the leaf spring 18 engages with the resin collar 23 of the receiving member 20, the resin collar 23 rotates around the shaft 22 due to engagement friction, so that the inner door 4 is fully locked. In addition, the operation sound can be kept low, and delivery can be performed without using a nerve in a time zone that requires special attention to noise such as early morning or night.

  When the fully open state of the middle door 4 is locked as described above, a part of the opening of the freezer 1 (for the area of the middle door 4) is opened. Can do. For this reason, the leakage of the cold air in the freezer 1 to the outside can be minimized, and an increase in the internal temperature can be suppressed to prevent poor quality of low temperature products and deterioration of fuel consumption due to operation of the refrigerator.

  In the above state, when the insertion / removal of the low temperature product into / from the freezer 1 is completed, the engagement of the receiving member 18a of the leaf spring 18 with the resin collar 23 is released if the inner door 4 is pulled to the near side. The inner door 4 can be closed as shown in FIG. 1 by rotating the inner door 4 around the hinge shaft 8B of the hinge 8 in the direction of the broken line arrow in FIG. A series of work is completed by locking the closed state. In this way, when the middle door 4 is closed, the resin collar 23 rotates about the shaft 22 even when the engaging portion 18a of the leaf spring 18 is disengaged from the resin collar 23 of the receiving member 20, so that the middle door 4 is unlocked. Is performed smoothly and the operation sound is kept low.

As described above, according to the open / close door for a refrigerator according to the present invention, the leaf spring 18 as the engaging member that constitutes the locking means is provided in the hinge 8 that supports the inner door 4. It is not necessary to reinforce the attachment location to the door 4. Further, since the receiving member 20 constituting the locking means is provided on the right door 5 adjacent to the middle door 4, the distance between the receiving member 20 and the leaf spring 18 is reduced, and the engagement between the two is dimensional accuracy of the middle door 4. It is performed well without being affected by the mounting accuracy, and the fully opened state of the middle door 4 is securely locked and unlocked.

  Further, in the present embodiment, as shown in FIG. 2, the fixing portion of the hinge arm 8C of the hinge 8 to the middle door 4 by the three bolts 17 and the right door by the upper and lower two bolts 16 of the hinge bracket 8A. 5 and the fixing part to the right door 5 by the two screws 21 of the upper and lower brackets 20 </ b> A of the receiving member 20 are disposed at symmetrical positions with respect to the center line N in the vertical direction of the hinge 8. The force that acts on the hinge 8 and the receiving member 20 by the opening and closing of the middle door 4 is evenly distributed to each fixing portion, and the effect that the mounting strength of the hinge 8 and the receiving member 20 is increased is also obtained.

  In the above-described embodiment, the middle door 4 is supported by the right door 5 so that it can be opened and closed, and the receiving member 20 is attached to the right door 5. However, the middle door 4 is supported by the left door 3 so that it can be opened and closed. Of course, the same effect as described above can be obtained even if the structure in which the receiving member 20 is attached to the left door 3 is employed.

DESCRIPTION OF SYMBOLS 1 Freezer 2 Freezer frame 2A Vertical frame on the left side of the frame 2B Vertical frame on the right side of the frame 2C Horizontal frame on the upper side of the frame 2D Horizontal frame on the lower side of the frame 3 Left door 4 Middle door 5 Right door 6 -8 hinge 8A hinge bracket 8B hinge shaft 8C hinge arm 9-11 lock bar 12 heat insulating plate 13 inner plate 14 outer plate 15 formwork 16, 17 bolt 18 leaf spring (engaging member)
18a Plate spring engaging portion 19 Stopper 20 Receiving member 20A Receiving member bracket 21 Screw 22 Shaft 23 Resin collar 24 Lock bar bracket 25 Resin cover N Center line of hinge in the vertical direction

Claims (3)

Openable and closable three doors are provided in the vehicle width direction, and the central middle door is either left or right by a hinge , with a laminated structure comprising two face materials and a heat insulating plate sandwiched between the two face materials . In the open / close door for a freezer car provided with a locking means that supports the door in an openable and closable manner and rotates only the middle door by approximately 180 ° and holds it in a fully open state.
The locking means is composed of an engaging member and a receiving member that engage and disengage with each other by opening and closing the inner door, the engaging member is provided on a hinge that supports the inner door, the hinge is provided on the outer surface of the door , and An open / close door for a freezer car , wherein a receiving member is provided on the outer surface of either the left or right door that supports the middle door. 2. The open / close door for a refrigerator car according to claim 1, wherein the engaging member is constituted by a leaf spring, and a resin collar that rotates when the leaf spring is engaged is provided on the receiving member. The fixed portions of the hinge provided with the engagement member and the receiving member are arranged at symmetrical positions with respect to the center line in the vertical direction of the hinge drawn in the horizontal direction from the center in the vertical direction of the hinge. The open / close door for a freezer car according to claim 1 or 2.

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