JP5707005B1 - Caster mounting structure and cart - Google Patents

Abstract

The present invention relates to a caster mounting structure that eliminates the use of fixing brackets such as screws and bolts, and enables easy and reliable mounting using mounting members. A support part for supporting an upper surface of a caster mounting base plate in a predetermined posture on a caster mounting part provided on a base of a mounted body, and a base side for hooking one end side of the mounting base plate from below. A hooking portion is formed, and an insertion hole portion opened on the upper surface of the base plate is formed in the vicinity of the other end side of the mounting base plate. The first mounting member and the second mounting member are formed in the insertion hole portion. This is a caster mounting structure in which the mounting base plate is fixed by inserting the other end of the mounting base plate from below and fixing the mounting base plate. [Selection] Figure 1

Description

  The present invention eliminates the need to use fixing brackets such as screws and bolts when mounting a caster on a mounting surface such as a bottom surface of a carriage, etc., and allows the caster to be easily and reliably mounted using a mounting member. And a mounted body such as a carriage using the same.

As a mounting structure of this type of caster, for example, in Japanese Patent Application Laid-Open No. 2006-21555, the caster base is fitted into a synthetic resin caster mounting portion provided on the bottom surface of the cargo bed, and a stopper is inserted from the top surface side of the cargo bed, thereby A caster mounting structure for mounting the caster to a loading platform by immovably fixing the pedestal of the caster, wherein the caster mounting portion includes a first insertion portion into which one side end of the pedestal of the caster is fitted, and the one side end And a second insertion portion that inserts an end portion on the other side that faces the portion, and the first insertion portion includes a relief portion that can be inserted further into the insertion direction from the fixed position. A stopper is inserted into the relief part of the first insertion part from the upper surface of the loading platform, and a pressing piece for pressing the other side edge of the inserted base is inserted from the upper surface of the loading platform into the second insertion part. Constitution It has been disclosed.
However, in the above configuration, since the stopper and the pressing piece inserted from the upper surface of the loading platform are separated from each other, it is necessary to arrange the opening for embedding them separately, and accurate positioning is required, Since it is configured to be prevented from being pulled out mainly by a frictional force, it may come off when a strong external impact force is applied.
Further, since the stopper and the pressing piece are separated from each other, the structure becomes complicated if an engagement means is provided for each.

JP 2006-21555 A

  The problem to be solved by the present invention is that the first mounting member and the second mounting member are fitted into one insertion hole, the caster mounting base plate is restrained by the first mounting member, and the second mounting member is used. It is an object of the present invention to provide a caster mounting structure having a simple structure that is strong against external impact and difficult to come off by restraining one mounting member and hooking it on the loading platform side.

In order to solve the above problem, the invention of claim 1
A caster mounting portion provided on the base plate of the mounted body has a support portion for supporting the upper surface of the caster mounting base plate in a predetermined posture, and a base side latching portion for hooking one end side of the mounting base plate from below. In the vicinity of the other end side of the mounting base plate, an insertion hole portion opened on the upper surface of the base plate is formed, and the first mounting member and the second mounting member are inserted into the insertion hole portion. In the caster mounting structure in which the other end side of the mounting base plate is hooked from below and the mounting base plate is fixed,
A first mounting member is hooked on the edge of the fitting hole, a first base hook piece, a first leg piece extending downward from the first base hook piece, and the one leg piece A first hooking piece for hooking the other end of the caster mounting base plate from below;
The second mounting member is engaged with the second base plate retaining piece latched on the edge of the insertion hole portion, and when the first mounting member is inserted into the insertion hole portion, the second mounting member is fitted into the remaining space and the first A peripheral wall portion in contact with the back surface of the first leg piece of the one attachment member; a second leg piece extending downward from the second base plate retaining piece; and provided at a position separated from the peripheral wall portion; and the second leg piece It consists of a locking claw part formed at the lower end of
A locking receiving piece extending downward along the mouth edge of the insertion hole is provided on the base plate,
The engagement claw portion is engaged with the distal end of the engagement receiving piece when the second attachment member is inserted.

  In this invention, the other end of the mounting base plate of the caster, in which the first mounting member and the second mounting member are inserted into one insertion hole and one end is latched to the base side latching section, is inserted from the insertion hole section. The first mounting member is inserted into the first mounting piece and is set on the caster mounting portion. The second mounting member is inserted into the remaining space in which the first mounting member of the insertion hole portion is inserted. 2 The first mounting member is restrained by contacting the peripheral wall portion of the mounting member and the back surface of the first leg piece, and at the same time, the locking claw portion at the lower end of the second leg piece of the second mounting member is locked to the base plate. Since the second mounting member is locked to the receiving piece so that the second mounting member does not fall out of the fitting hole, the caster can be easily and securely attached to the mounted member such as a base plate without using a fixing bracket such as a bolt. be able to.

It is a perspective view which shows the attachment structure of the caster of the base plate of a trolley | bogie. It is a perspective view of a trolley, (a) shows before insertion of the 1st attachment member and the 2nd attachment member , and (b) shows after insertion. (A) A perspective view of the first mounting member, (b) a sectional view of the same. (A) A perspective view of the second mounting member, (b) a sectional view of the same. It is a perspective view of a fitting hole part. It is a top view of a base board. It is the sectional view on the AA line of FIG. It is sectional drawing of the state which inserted the 1st attachment member in the insertion hole part. It is sectional drawing of the state which inserted the 1st attachment member and the 2nd attachment member in the insertion hole part. It is the perspective view which looked at the caster attachment part periphery from the bottom, Comprising: (a) is before caster attachment, (b) is after caster attachment.

A first mounting member and the second mounting member is fitted into one of the fitting holes, hooking the mount plate of the caster in the first mounting member, said restraining the first mounting member in the second mounting member second mounting member By locking to the cargo bed side, it was possible to easily and securely mount the caster on the base plate.

In the following, a preferred embodiment when the caster mounting structure of the present invention is applied to a platform (loading platform) of a carriage will be described with reference to the drawings.
In the case of the present embodiment, the base plate 1 is made of a rectangular synthetic resin base plate, and on the upper surface, a through hole 8a for gripping, a hole 8b for fitting a wheel of the caster 30 during stacking, and the like are appropriately provided. Is formed.
Reinforcing ribs 8 project in a grid pattern on the back surface of the base 1, and caster mounting portions 2 for mounting casters 30 are formed at the four corners.

Here, the caster 30 has a plate-shaped mounting base plate 31 at the upper portion, and the support yoke 33 that pivotally supports the wheel W is a turning caster that is rotatably mounted on the mounting base plate 31 via a bearing portion 32. However, a straight caster in which the support yoke 33 is fixed to the mounting base plate 31 may be used.
Further, the wheel may be a single wheel or a double wheel.
Further, a single mounting base plate 31 having a plurality of casters mounted thereon can be used as a mounting caster in the present invention.

A large number of reinforcing ribs 8 project in a grid pattern on the back surface of the base 1, and caster mounting portions 2 for mounting the casters 30 are provided at four corners.
The caster mounting portion 2 is in contact with the upper surface of the mounting base plate 31 of the caster 30 to support the mounting base plate 31 horizontally at a predetermined height. A hook-like base-side latching portion 4 that hangs from one surface of the base 3 from the upper surface of the base 1 and protrudes toward the inside of the base 3, and a base on the base side of the base 3 It has a fitting hole portion 5 formed at a location facing the board side latching portion 4 and a locking receiving piece 7 that is in contact with the fitting hole portion 5 and is suspended from the upper surface.

The support part 3 is substantially half the length of the reinforcing rib 8, and a base side latching part 4 is formed at one end of the support part 3 near the outer end in the longitudinal direction of the base 1. In the case of the illustrated example, the base side latching part 4 protrudes toward the support part 3 at a midway position of the rib that hangs down from the upper surface of the base 1, and supports the mounting base plate 31 from below by the protruding surface. However, the tip is bent at a right angle and has a hook shape that hangs down.

Therefore, a height difference corresponding to the thickness of the mounting base plate 31 of the caster 30 is provided between the lower end of the support portion 3 and the protruding surface of the base side latching portion 4.
In addition, since the said base side latching | locking part 4 is being integrally fixed to the baseboard 1 and does not have elasticity, the mounting base plate 31 protruded the said base side latching part 4 by making the front-end | tip diagonally upward. Place and hang on the surface (see Figure 7).

Next, as shown in FIG. 5, the fitting hole portion 5 includes a substantially rectangular through hole on the base end side of the support portion 3.
The insertion hole portion 5 is provided on the other end portion of the support portion 3 on the side facing the base side latching portion 4.
That is, in the illustrated example, the support portion 3 includes a plurality of positioning ribs 3 a whose tips abut with the midway position of the mounting base plate 31 and the other of the mounting base plate 31 facing the base side latching portion 4. It comprises a guide rib 3b that abuts the end of the guide.

The guide rib 3 b also serves as one wall portion of the insertion hole portion 5.
The insertion hole portion 5 has a first base plate retaining piece 11 and a second mounting member of the first mounting member 10 to be described later at the opening edge portions on the three sides of the vertical side of the opening close to the support portion 3 and the left and right side sides. 20, and the upper surfaces of the first and second platform retaining pieces 11 and 21 are flush with the upper surface of the platform 1. Step portions 6a to 6c set to the same thickness as the above-mentioned latching pieces 11 and 21 are provided (see FIG. 5).
The guide rib 3 b hangs from the top surface of the base plate 1 from the tip of the step portion 6 a on the vertical side to form a peripheral wall on the vertical side of the insertion hole portion 5.

Further, on the vertical side of the opening that is spaced apart from the support portion 3 that faces the stepped portion 6a of the fitting hole portion 5, a protruding portion 9 that protrudes on the opening side is formed in the middle position.
The protrusion 9 is a locking receiving piece 7 that is suspended as it is and engaged with a locking claw 23 of a second mounting member 20 described later.

Next, as shown in FIG. 3, the first mounting member 10 includes a first base board retaining piece 11 and a first leg that hangs down from one (rear) end of the first base board retaining piece 11. It consists of a piece 12 and a first latch piece 14 provided at the lower end of the first leg piece 12.
The first base hooking piece 11 is made of a rectangular plate, and is hooked by being engaged with the stepped portion 6a of the fitting hole portion 5 except for a portion connected to the first leg piece 12.

As a result, the first leg pieces 12 overlap with each other along the outside of the guide rib 3b without any gap, and project the first hooking piece portion 14 toward the support portion 3 at a location beyond the guide rib 3b. Let
The first hooking piece 14 is bent at a right angle from the first leg piece 12, and the upper surface thereof is arranged at the same level as the protruding surface of the platform side hooking part 4.
Also, a pair of reinforcing protrusions 14a are formed on the bottom surface at both ends in the width direction.

Therefore, the other end of the mounting base plate 31 of the caster 30 whose one end is latched to the base side latching portion 4 can be leveled and latched on the first latching piece portion 14 (FIG. 8). reference).
In this state, the first mounting member 10 moves freely within the insertion hole portion 5, so that the second mounting member 20 is inserted into the remaining gap of the insertion hole portion 5 in which the first attachment member 10 is inserted.

As shown in FIG. 4, the second mounting member 20 includes a second base plate retaining piece 21, a peripheral wall portion 24 that hangs down from the second base side retaining portion 4 and surrounds three sides, and the peripheral wall portion 24. The second leg piece 22 hangs down at an intermediate position surrounded by the elastic portion and has elasticity, and a locking claw portion 23 that protrudes in a direction away from the support portion 3 at the lower end of the second leg piece 22.

The second base latching piece 21 is formed of a rectangular plate that is aligned with the first baseboard latching piece 11, and is recessed toward the support part 3 at an intermediate position on the side that is separated from the support part 3. A recess 25 is formed.
The recess 25 is formed by a recess that fits into the protrusion 9 formed in the insertion hole 5 with substantially no gap.

And the 2nd leg piece 22 which has the elasticity drooping along the groove bottom face of this recessed part 25 is provided, and the latching claw part 23 which protrudes in the said protrusion 9 side is formed in the lower end.
The locking claw portion 23 can be engaged with the lower end of the locking receiving piece 7 that hangs down from the upper surface of the base 1 along the protrusion 9.

  In other words, the locking claw 23 abuts the upper surface of the projection 9 when fitted into the fitting hole 5, but has a sloped surface whose bottom end is inclined while gradually becoming thinner upward in the protruding direction. Therefore, by pushing down, while the second leg piece 22 is bent toward the support portion 3 side, the locking claw portion 23 is displaced toward the support portion 3 side, and sliding along the end surface of the locking receiving piece 7 The lower leg 22 can be engaged with the lower end of the latch receiving piece 7 by the repulsive force of the second leg piece 22.

A circumferential wall portion 24 is formed so as to surround the three leg portions in a state of being separated from the second leg piece 22 and to be fitted into the fitting hole portion 5 without a gap.
The peripheral wall portion 24 hangs down from a midway position while leaving a surface that can be engaged with the left and right step portions 5b and 5c at the left and right edges at one end (the support portion 3 side) of the second base plate retaining piece 21. It has a wall surface 24a.
When the second mounting member 20 is pushed into the insertion hole portion 5, the back wall surface 24 a contacts the back surface of the first hooking piece portion 14 of the first mounting member 10 without any gap, and inserts the first mounting member 10. Restrain in the hole 5.

  The peripheral wall portion 24 having the back wall surface 24a in the center is bent at a right angle from the back wall surface 24a toward the direction away from the support portion 3, and is substantially the same as a pair of ribs (peripheral walls) 5e forming the peripheral wall of the fitting hole portion 5. It has a pair of side wall surfaces 24b and 24c in contact with each other without a gap, and forms a peripheral wall portion 24 that surrounds the three sides while providing a gap with the second leg piece 22.

Therefore, the other end of the mounting base plate 31 of the caster 30 latched by the first latching piece portion 14 of the first mounting member 10 is locked to the base 1 side by the second mounting member 20. It can restrain by engaging the latching claw part 23 with the receiving piece 7.
Moreover, the 1st base board latching piece 11 and the 2nd base board latching piece 21 are latched by the level | step-difference parts 5a-c of the insertion hole part 5 without gap, and the upper surface after insertion is the upper surface of the base board 1. Set to the same plane.
Furthermore, since the 1st base board latching piece 11 and the 2nd base board latching piece 21 are set in the division | segmentation shape which plugs up the opening of the insertion hole part 5 without gap when it inserts in the insertion hole part 5, It does not come out of the insertion hole 5.

Thus, when mounting, first, as shown in FIG. 7, one end of the mounting base plate 31 of the caster 30 is hooked on the base side hooking portion 4, and the mounting base plate 31 is horizontal, as shown in FIG. As shown, the first mounting member 10 is inserted into the insertion hole 5, the other end of the mounting base plate 31 is latched by the first latching piece 14, and then the second mounting is performed as shown in FIG. By inserting the member 20 into the insertion hole 5 and engaging the locking claw 23 with the locking receiving piece 7, the first mounting member 10 is also restrained in the insertion hole 5 via the second mounting member 20. Therefore, the caster 30 can be securely attached to the base plate 1 with a simple operation without using a fixing bracket such as a screw.

In the said Example, although the base, the 1st attachment member, and the 2nd attachment member illustrated the case made from a synthetic resin, those raw materials are not limited to the said Example.
In the second mounting member 20, the second leg piece 22 has a structure having elasticity or flexibility, and the locking receiving piece 7 is a member fixed to the base plate. Conversely, the second leg piece 22 is elastic. It is also possible that the latch receiving piece 7 has elasticity or flexibility.
In that case, the locking claw 23 descends while bending the locking receiving piece 7 and passes through the lower end of the locking receiving piece 7, so that the locking receiving piece 7 returns to its original position by elastic force, It can be engaged with the receiving piece 7.

Moreover, in the said Example, when the 1st attachment member 10 and the 2nd attachment member 20 are fitted to the insertion hole part 5, while the upper opening of the insertion hole part 5 will be plugged up without gap, the inserted 1st attachment member 10 will be filled. In the present invention, the upper surfaces of the first mounting member 10 and the second mounting member 20 are the upper surfaces of the base plate 1. It may be more depressed or protrude.
Moreover, a gap, a groove, a hole or the like remains in a part of the upper opening of the insertion hole portion 5 and may not be completely closed.

Moreover, in the said Example, although the base (loading platform) of the trolley | bogie was demonstrated to the example as a to-be-attached body of a caster, in this invention, what is necessary is just an attached body provided with the base to which a caster is attached, There are no particular restrictions on the structure or use of the.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

1 base
2 Caster mounting part
3 Support Department
3a Positioning rib 3b Guide rib 4 Stand side latch
5 Insertion hole
5a-c Stepped part 5e Rib (peripheral wall)
6 steps
7 Locking piece
8 Reinforcing ribs 9 Projections
10 First mounting member
11 First base hanging piece
12 First leg piece
13 Back
14 First hook piece
20 Second mounting member
21 Second base hanging piece
24 Perimeter wall
22 Second leg piece
23 Locking claw
24 Perimeter wall
25 Recess 30 Casters
31 Mounting base plate 32 Bearing portion 33 Support yoke

Claims (6)

A caster mounting portion provided on the base plate of the mounted body has a support portion for supporting the upper surface of the caster mounting base plate in a predetermined posture, and a base side latching portion for hooking one end side of the mounting base plate from below. In the vicinity of the other end side of the mounting base plate, an insertion hole portion opened on the upper surface of the base plate is formed, and the first mounting member and the second mounting member are inserted into the insertion hole portion. In the caster mounting structure in which the other end side of the mounting base plate is hooked from below and the mounting base plate is fixed,
A first mounting member is hooked on the edge of the fitting hole, a first base hook piece, a first leg piece extending downward from the first base hook piece, and the one leg piece A first hooking piece for hooking the other end of the caster mounting base plate from below;
The second mounting member is engaged with the second base plate retaining piece latched on the edge of the insertion hole portion, and when the first mounting member is inserted into the insertion hole portion, the second mounting member is fitted into the remaining space and the first A peripheral wall portion in contact with the back surface of the first leg piece of the one attachment member; a second leg piece extending downward from the second base plate retaining piece; and provided at a position separated from the peripheral wall portion; and the second leg piece It consists of a locking claw part formed at the lower end of
A locking receiving piece extending downward along the mouth edge of the insertion hole is provided on the base plate,
A caster mounting structure, wherein a locking claw is locked to a tip of a locking receiving piece when the second mounting member is fitted. A first mounting member that is hooked to a step portion formed at a lip portion of the insertion hole, and a first leg piece that extends downward from the first mounting plate; It is bent from the one leg piece and extends to the other end side of the mounting base plate, and includes a first hooking piece portion for hooking the other end of the mounting base plate from below.
When the second mounting member is inserted into the stepped portion of the upper surface of the base plate formed on the edge of the insertion hole portion and the first mounting member is inserted into the insertion hole portion . A peripheral wall portion that fits in the remaining space without any gap and abuts the back surface of the first leg piece of the first mounting member and surrounds the three sides, and extends downward from the second base plate retaining piece and is separated from the peripheral wall portion A second leg piece having elasticity provided at the position, and a locking claw part projecting outward from the insertion hole at the lower end of the second leg piece,
A locking receiving piece extending downward along the mouth edge of the insertion hole is provided on the base plate,
When the second mounting member is inserted, the locking claw portion passes through the locking receiving piece while bending the second leg piece, and the locking claw portion is engaged with the distal end of the locking receiving piece by the elastic force of the second leg piece. The caster mounting structure according to claim 1, wherein the caster mounting structure is stopped.   The peripheral wall portion hangs down from the second base side latching portion and surrounds three sides, and the second leg piece hangs down at an intermediate position surrounded by the peripheral wall portion. The caster mounting structure described. A protrusion projecting inward of the insertion hole is formed at the edge of the outer end of the insertion hole,
A recess corresponding to the protrusion is formed in the second base plate retaining piece of the second mounting member,
The protrusion is integrally formed with a base end of a locking receiving piece extending downward,
The caster attachment structure according to any one of claims 1 to 3, wherein a second leg piece extending downward from the bottom of the recess is formed integrally with the recess.   The upper surfaces of the first base plate retaining piece and the second base plate retaining piece have a shape that closes the upper opening of the fitting hole portion 5 without gap when the first attachment member and the second attachment member are fitted into the fitting hole portion. The caster mounting structure according to claim 1, wherein the caster mounting structure is set so as to be flush with the upper surface of the base plate.   A cart having the caster mounting structure according to any one of claims 1 to 5.

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