JP2012001039A - Floor lock and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor lock that can firmly attach an attachment member and a fixed cylinder member without using welding, and can easily and quickly manufacture a fixed casing.SOLUTION: The floor lock includes the fixed casing 8 attached to a member to be attached having wheels, and a slide member which is freely attached to the fixed casing 8 in the vertical direction, slides downward by a pedal lock, and abuts on a grounding face. The fixed casing 8 includes the plate-shaped attachment member 1 attached to the member to be attached, and the cylindrical fixed cylinder member 2 firmly attached to the attachment member 1 in a hung-down manner. A circular insertion hole 11 having a small notch 12 and inserted with the upper end 20 of the fixed cylinder member 2 is formed at the attachment member 1, and the fixed cylinder member 2 has an outer-flange shaped annular protrusion 21 which is formed by compressing the vicinity of the upper end, an upper-end outer flange 20 which is formed by bending the upper end 20 penetrating the insertion hole 11 in the radial outward direction, and a fitting protrusion 20d which is formed by pushing the upper end 20 of the vicinity of the small notch 12 into the small notch 12.

Description

  The present invention relates to a floor lock and a method for manufacturing a floor lock.

2. Description of the Related Art Conventionally, there is a floor lock that expands and contracts in the vertical direction in order to fix the cart so that it does not move (run) when loading / unloading a load on a cart with wheels.
Such a floor lock includes a fixed casing that is attached to the lower surface of the carriage, and a slide member that is slidably attached to the fixed casing so as to be slidable in the vertical direction and slides downward by a lock pedal and contacts the grounding surface. (For example, refer to Patent Document 1).

JP 2009-154630 A

  The fixed casing of the floor lock has been manufactured by fixing a plate-like attachment member and a cylindrical fixed cylinder member by welding. However, performing uniform welding on the entire circumference of the fixed cylinder member has a problem that it takes time and labor.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a floor lock and a method for manufacturing the floor lock that can fix the mounting member and the fixed cylinder member without welding and can easily and quickly produce a fixed casing.

  In order to achieve the above object, a floor lock of the present invention includes a fixed casing attached to a mounted member having wheels, and is slidably attached to the fixed casing so as to be slidable in a vertical direction and is slid downward by a lock pedal. The fixed casing includes a plate-like attachment member attached to the attached member and a hanging member fixed to the attachment member. A cylindrical fixed cylinder member, and the mounting member has a small notch at the periphery and a circular insertion hole into which the upper end of the fixed cylinder member is inserted, and the fixed cylinder member is An outer flange-shaped annular convex portion formed by compressing the vicinity of the upper end, an upper end outer flange portion formed by bending the upper end portion inserted through the insertion hole radially outward, and the vicinity of the small notch portion Push the upper end into the small notch It formed a fitting convex portions and has a.

  Further, the floor lock manufacturing method of the present invention includes a fixed casing attached to a mounted member having wheels, and is slidably attached to the fixed casing so as to be slidable in the vertical direction, and is slid downward by a lock pedal to be grounded. In the manufacturing method of the floor lock provided with the slide member, the mounting member is manufactured by punching a circular insertion hole having a small notch in the periphery of the plate-like member, and the upper end of the cylindrical member. The vicinity is compressed and plastically deformed to form an outer ring-shaped annular convex portion to produce a fixed cylindrical member, and the upper end portion of the fixed cylindrical member is inserted into the insertion hole of the mounting member. The upper end portion through which the hole is inserted is bent radially outward, and the upper end portion in the vicinity of the small cutout portion is pushed into the small cutout portion to prevent the attachment member and the fixed cylindrical member from coming off and rotating. To make the fixed casing It is a method of.

  According to the present invention, the attachment member and the fixed cylinder member can be fixed without performing welding, and the fixed casing can be easily and quickly manufactured. It is possible to reliably prevent the attachment member and the fixed cylinder member from coming off and preventing rotation. A fixed cylinder member can be appropriately fixed to a predetermined position of the mounting member.

It is a principal part cross-section side view which shows the lock release state of one Embodiment of this invention. It is a principal part cross-section side view which shows the locked state of one Embodiment. It is a top view which shows an example of an attachment member. It is AA sectional drawing of FIG. It is a principal part cross-sectional side view which shows an example of a fixed cylinder member. It is a top view which shows an example of a fixed casing. It is BB sectional drawing of FIG. It is principal part sectional drawing explaining the process of the manufacturing method of this invention.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIG. 1, the floor lock of the present invention is configured such that when the lock pedal 5 is swung downward from a state where it is suspended from the lower surface side of the mounted member D such as a carriage having wheels, the slide member 9 is moved downward. The state of sliding downward and contacting the grounding surface G is maintained, and as shown in FIG. Further, when the release pedal 6 is swung downward from the locked state, the slide member 9 slides upward and is separated from the ground contact surface G, and the mounted member D can travel (move) by returning to the state shown in FIG. It becomes unlocked state.

  As shown in FIGS. 1 and 2, the fixed casing 8 attached to the lower surface side of the attached member D, the slide member 9 attached to the fixed casing 8 so as to be slidable in the vertical direction, and the slide member 9 downward A lock pedal 5 that is slid into a contact state with the ground contact surface G, a release pedal 6 that releases the lock state of the slide member 9, and a resilient member 7 that constantly urges and urges the slide member 9 upward. The first shaft member 3 attached to the fixed casing 8 and pivotally attached to the lock pedal 5, the second shaft member 4 attached to the slide member 9 and pivotally attached to the release pedal 6, and the lock pedal 5 and release And a pivot shaft for connecting the pedal 6.

The fixed casing 8 includes a plate-shaped mounting member 1 attached to the mounted member D, and a cylindrical fixed cylinder member 2 fixed to the mounting member 1 in a suspended manner.
The slide member 9 is attached to the fixed cylinder member 2 so as to be slidable in the vertical direction so as to be slidably fitted into the fixed cylinder member 2, and is in contact with the lower end of the movable cylinder member 91 so as to be adjustable in the vertical direction. And a member 92.

3 and 4, the mounting member 1 has a circular insertion hole 11 formed therethrough. The insertion hole 11 has a plurality (2 to 4) of U-shaped small notches 12, 12, and 12 that are notched radially outward from the inner peripheral edge (inner surface). The plurality of small notches 12 are arranged in a uniform distribution around the axial center La of the insertion hole. Specifically, it has three at intervals of 120 degrees.
Further, the mounting member 1 has an annular recess 13 that surrounds the insertion hole 11 and has a seating surface (flat surface) 13a positioned lower than the upper surface (mounting plane) 1a of the mounting member 1. . Moreover, it has the attachment hole 14 in which the bolt member etc. for attaching to the to-be-attached member D are penetrated in the vicinity of each corner | angular part.

In FIG. 5, the fixed cylindrical member 2 before being fixed to the mounting member 1 has an outer flange-like annular convex portion 21 disposed near the upper end portion 20 and the first shaft member 3 in the direction perpendicular to the axis Lb. It has a through hole 23 to be inserted and a long hole 24 through which the second shaft member 4 is inserted in the direction perpendicular to the axis Lb so as to be slidable in the vertical direction.
As shown in FIGS. 6 and 7, the fixed tube member 2 after being fixed to the mounting member 1 has an annular convex portion 21 and an upper end portion 20 inserted through the insertion hole 11 of the mounting member 1 radially outward. An upper end outer flange portion 20b formed by bending, a fitting convex portion 20d formed by pushing the upper end portion 20 in the vicinity of the small cutout portion 12 into the small cutout portion 12, a through hole 23, and a long hole 24, Have.

Next, the manufacturing method and operation of the floor lock of the present invention will be described.
3 and 4, a circular insertion hole 11 having a small notch 12 and a mounting hole 14 are punched and formed (penetrated) in a plate member by press working. Further, the periphery of the insertion hole 11 is pressed downward by press working to be plastically deformed to form the recess 13. The attachment member 1 is produced from the plate-like member by such pressing. Note that the order of the punching process of the insertion hole 11, the punching process of the mounting hole 14, and the forming process of the recess 13 may be either first or simultaneously.

  In FIG. 5, the vicinity of the upper end of the cylindrical member is compressed and plastically deformed by press working to form an annular convex portion 21. Further, the through hole 23 and the long hole 24 are formed by stamping. The fixed cylinder member 2 is formed by such pressing. Note that the order of the punching process of the through-hole 23, the punching process of the long hole 24, and the forming process of the annular convex portion 21 may be either first or simultaneously.

  Next, as shown in FIG. 8A, the upper end portion 20 of the fixed cylinder member 2 is inserted into the insertion hole 11 of the mounting member 1. The lower surface 1 b of the mounting member 1 is brought into contact with the upper surface 21 a of the annular convex portion 21. Of the upper end 20 that has been inserted, the portion to be bent (projection) 20a, which is the portion that has been inserted through the insertion hole 11, is turned radially outward by pressing as shown in FIG. 8B. The upper end outer flange portion 20b is formed by bending it into an L shape. The outer peripheral edge portion of the insertion hole 11 is sandwiched between the upper end outer flange portion 20b and the annular convex portion 21, thereby preventing the vertical movement (positional deviation) between the mounting member 1 and the fixed cylinder member 2.

  When the recess 13 of the mounting member 1 is plastically processed, the seat surface 13a of the recess 13 is formed such that the upper end outer flange portion 20b does not protrude upward from the upper surface 1a of the mounting member 1. That is, the seating surface 13a from the upper surface 1a of the mounting member 1 is formed at a lower position with a size larger than the thickness of the upper end outer flange portion 20b. Further, the outer peripheral edge portion of the insertion hole 11 together with the annular convex portion 21 has a strong U-shaped cross section by making the upper end outer flange portion 20b bend in parallel with the seating surface 13a. Can be pinched. The recess 13 does not need to be greatly depressed downward, which is easy to process and can contribute to the downsizing of the floor lock.

  Next, of the inserted upper end 20, a portion to be pressed (planned portion) 20 c in the vicinity of the small notch 12 is pressed into the small notch 12 as shown in FIG. 8 (c). To form a fitting convex portion 20d. The small cutout portion 12 and the fitting convex portion 20d are fitted to prevent mutual rotation (position shift) between the mounting member 1 and the fixed cylindrical member 2. In other words, the push-in portion 20c is caulked and fixed to the small cutout portion 12 to perform rotation prevention. Note that the upper end outer flange portion 20b and the fitting convex portion 20d may be formed at the same time.

In this way, as shown in FIGS. 6 and 7, a fixed casing 8 is obtained in which the attachment member 1 and the fixed cylinder member 2 are secured by being prevented from coming off and rotating. Compared with welding, the axial center La of the insertion hole 11 and the axial center Lb of the fixed cylindrical member 2 can be securely arranged and fixed, and the fixed casing 8 excellent in quality and aesthetics can be obtained.
The first shaft member 3, the second shaft member 4, the lock pedal 5, the release pedal 6, the elastic member 7, the slide member 9, and the pivot shaft that are manufactured in a separate process on the fixed casing 8 manufactured as described above. , To produce a floor lock.

If the rotation is prevented by welding to the corner of the lower surface 1b of the attachment member 1 without forming the fitting protrusion 20d, the annular protrusion 21 and the lower surface 1b of the attachment member 1 are provided. The molten metal permeates during this time, and there is a high possibility that defects such as axial misalignment and deformation will occur, making manufacturing difficult. In addition, the beauty is also impaired.
Further, when the seat surface 13a of the mounting member 1 and the upper end outer flange portion 20b of the fixed cylinder member 2 are welded to prevent rotation, molten metal permeates between the seat surface 13a and the upper end outer flange portion 20b. Therefore, there is a high possibility that problems such as floating of the member and misalignment of the shaft center will occur. Moreover, it is necessary to form deeply the recessed part 13 of the attachment member 1 so that attachment to the to-be-attached member D may not become difficult by the build-up by welding.

  In the present invention, the design can be changed, and the movable cylinder member 91 of the slide member 9 may be attached to the fixed cylinder member 2 in an outer fitting manner. The shapes and connection structures of the lock pedal 5 and the release pedal 6 may be other than those described above. That is, what is necessary is just to have a pedal which can hold | maintain a locked state, or a pedal which can cancel | release a lock | rock.

  As described above, the floor lock according to the present invention is fixed to the fixed member 8 attached to the mounted member D having wheels, and attached to the fixed casing 8 so as to be slidable in the vertical direction, and is slid downward by the lock pedal 5. In the floor lock provided with the slide member 9 that comes into contact with the grounding surface G, the fixed casing 8 is a plate-like attachment member 1 that is attached to the attached member D, and the attachment member 1 is suspended. A cylindrical fixed tube member 2 to be fixed, and the mounting member 1 has a small notch 12 at the periphery and a circular insertion hole 11 into which the upper end 20 of the fixed tube member 2 is inserted. The fixed cylinder member 2 has an outer flange-shaped annular convex portion 21 formed by compressing the vicinity of the upper end, and an upper end outer flange portion 20b formed by bending the upper end portion 20 inserted through the insertion hole 11 radially outward. And formed by pushing the upper end 20 near the small notch 12 into the small notch 12. A convex portion 20d, because it has a weld can fix the the mounting member 1 and the fixed barrel member 2 without the stationary casing 8 can be made easily and quickly. It is possible to reliably prevent the attachment member 1 and the fixed cylinder member 2 from coming off and preventing rotation. The fixed casing 8 can be produced almost only by pressing, and the manufacturing process and manufacturing equipment can be simplified without the need for a welding process and welding equipment. Moreover, since there is no fear of occurrence of defects such as deformation or perforation due to heat in the welding operation, the attachment member 1 and the fixed cylinder member 2 can be made thin, which can contribute to weight reduction of the floor lock. A floor lock can be manufactured easily, quickly and efficiently. The fixed cylinder member 2 can be appropriately and easily fixed to a predetermined position of the mounting member 1.

  The method for manufacturing a floor lock according to the present invention includes a fixed casing 8 attached to a mounted member D having wheels, and is attached to the fixed casing 8 so as to be slidable in the vertical direction and is slid downward by a lock pedal 5. In the manufacturing method of the floor lock provided with the slide member 9 that comes into contact with the ground contact surface G, a circular insertion hole 11 having a small notch 12 at the peripheral edge is punched into the plate-like member to attach the mounting member 1. Then, the vicinity of the upper end of the cylindrical member is compressed and plastically deformed to form the outer ring-shaped annular convex portion 21 to produce the fixed cylindrical member 2, and the fixed cylindrical member 2 is inserted into the insertion hole 11 of the mounting member 1. The upper end 20 is inserted, the upper end 20 inserted through the insertion hole 11 is bent radially outward, and the upper end 20 near the small notch 12 is pushed into the small notch 12 to be fixed to the mounting member 1. The fixed casing 8 is produced by preventing the cylinder member 2 from coming off and preventing rotation. In welding can securing the mounting member 1 and the fixed barrel member 2 without the stationary casing 8 can be made easily and quickly. It is possible to reliably prevent the attachment member 1 and the fixed cylinder member 2 from coming off and preventing rotation. The fixed casing 8 can be produced almost only by pressing, and the manufacturing process and manufacturing equipment can be simplified without the need for a welding process and welding equipment. Moreover, since there is no fear of occurrence of defects such as deformation or perforation due to heat in the welding operation, the attachment member 1 and the fixed cylinder member 2 can be made thin, which can contribute to weight reduction of the floor lock. A floor lock can be manufactured easily, quickly and efficiently. The fixed cylinder member 2 can be appropriately and easily fixed to a predetermined position of the mounting member 1.

DESCRIPTION OF SYMBOLS 1 Mounting member 2 Fixed cylinder member 5 Lock pedal 8 Fixed casing 9 Slide member
11 Insertion hole
12 Notch
20 Upper edge
20b Upper outer flange
20d Mating convex part
21 Annular convex part D Mounted member G Grounding surface

Claims (2)

A fixed casing (8) attached to a mounted member (D) having wheels, and a fixed ground (8) which is slidably attached to the fixed casing (8) and slid downwards by a lock pedal (5). A floor lock provided with a slide member (9) abutting on (G),
The fixed casing (8) includes a plate-shaped mounting member (1) attached to the mounted member (D), and a cylindrical fixed cylinder member (fixed in a hanging manner to the mounting member (1)). 2)
The mounting member (1) has a small notch (12) at the periphery and a circular insertion hole (11) into which the upper end (20) of the fixed cylinder member (2) is inserted.
The fixed cylinder member (2) has an outer flange-shaped annular convex part (21) formed by compressing the vicinity of the upper end and the upper end part (20) inserted through the insertion hole (11) radially outward. An upper end outer flange portion (20b) formed by bending, and a fitting convex portion (20d) formed by pushing the upper end portion (20) in the vicinity of the small notch portion (12) into the small notch portion (12) And a floor lock. A fixed casing (8) attached to a mounted member (D) having wheels, and a fixed ground (8) which is slidably attached to the fixed casing (8) and slid downwards by a lock pedal (5) In a method for manufacturing a floor lock comprising a slide member (9) that contacts (G),
A mounting member (1) is produced by punching a circular insertion hole (11) having a small notch (12) at the periphery of the plate-like member,
The vicinity of the upper end of the cylindrical member is compressed and plastically deformed to form an outer ring-shaped annular convex portion (21), and a fixed cylindrical member (2) is produced,
The upper end (20) of the fixed cylindrical member (2) is inserted into the insertion hole (11) of the mounting member (1), and the upper end (20) inserted through the insertion hole (11) is radial. Bend outward, push the upper end (20) in the vicinity of the small notch (12) into the small notch (12), and connect the mounting member (1) and the fixed cylinder member (2). A method for producing a floor lock, characterized in that the fixed casing (8) is produced by retaining and preventing rotation.

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