JP5557341B2 - Brake braking structure - Google Patents

Description

  The present invention relates to a brake structure for a carriage that can brake a wheel of the carriage with a handle.

As a structure for braking the wheel of the carriage, the present applicant has proposed JP 2010-163056 and has achieved a corresponding result.
In the above configuration, the brake pedal or brake release pedal of the wheel is raised and lowered on the loading platform so that it does not protrude outward from the outer periphery of the loading platform, and it is easy to operate and the braking pedal interferes with external obstacles when the carriage moves. I tried not to.
Therefore, the wheel is braked by the pedal operation, but the brake operation cannot be performed by the brake lever.
On the other hand, in a transport container equipped with a braking mechanism disclosed in JP-A-10-72092, a fixed caster braking mechanism provided at the bottom of the container body and a brake lever provided at a handle of the container are connected by a wire, A structure is disclosed in which a lever operating force is transmitted to a braking mechanism by a wire.
However, in the above configuration, since the wire extends from the brake lever along the outer peripheral wall surface of the container to the bottom of the container body, the wire is detoured long while being exposed to the outside until the wire is connected to the braking mechanism. There was a risk of being caught by an obstacle or receiving an impact from the outside.

JP 2010-163056 A Japanese Patent Laid-Open No. 10-72092 See FIG.

  The present invention was devised in view of the above circumstances, and its main problem is to transmit a reliable braking force by penetrating the carrier of the carriage without connecting the brake wire and connecting it to the braking mechanism. An object of the present invention is to provide a dolly braking structure that can be used.

In order to solve the problem, the invention of claim 1
In the brake structure that has a pair of left and right wheels before and after the bottom of the loading platform of the carriage and simultaneously brakes or releases the braking of the left and right pair of wheels on either side of the carriage with a handle protruding on the upper surface of the loading platform,
A brake lever part pivotally attached to a bracket fixed to the handle;
An inner cable is inserted into the outer cable, one end of the outer cable is connected to the tip of the bracket, one end of the inner cable is connected to the tip of the brake lever, and the other end of the outer cable is connected to the loading platform. A brake cable fixed to the cable receiving portion provided, and extending to the bottom of the loading platform through the through hole of the loading platform where the inner cable communicates with the hole of the cable receiving portion;
A pair of left and right support pieces fixed to the bottom of the cargo bed,
A shaft portion pivotally attached to the pair of support pieces, or slidably mounted between the pair of support pieces and horizontally spanned;
A pair of brake shoe parts having a base end fixed to the shaft part and capable of displacing the pair of left and right wheels in a braking or braking release direction;
An operation piece fixed to the shaft portion and formed with a cable connecting portion for connecting the other end of the inner cable,
The operating piece protrudes toward the rear of the loading platform at the center of the shaft portion, and the brake shoe portion protrudes in a pair on the left and right sides of the shaft portion toward the front of the loading platform opposite to the operating piece,
By operating the brake lever portion, the shaft portion is pivoted by the operating piece , the pair of left and right brake shoe portions are tilted downward from the upper position , pressed against the tread surface of the pair of left and right wheels, and braked to separate. In the invention of claim 2, the brake is released by
A coil spring is interposed between the bottom surface of the cargo bed facing the cable receiving portion and the cable connecting portion and fitted to the inner cable extending from the through hole of the cargo bed, and the brake shoe portion is biased in the braking release direction. It is characterized by being made.
In the invention of claim 3,
The support piece of the shaft portion is formed by using a support yoke outside the loading platform straddling the tread surface of the wheel as a support piece.

In this invention, the brake wire having one end connected to the brake lever is fixed to the cable receiving portion fixed to the carriage bed of the carriage, the other end of the outer cable is fixed, and the other end of the inner cable is inserted through the cable receiving portion and the loading platform. By connecting to the cable receiving portion of the braking mechanism, it is possible to reliably transmit the operating force of the brake lever without detouring the brake cable.
Moreover, since it does not become an obstacle of another mechanism as a simple structure, you may mount | wear with a trolley beforehand and can also mount | wear with retrofit.

It is a perspective view of the brake structure of the trolley | bogie of Example 1. FIG. It is the fragmentary perspective view which looked at the trolley | bogie of Example 1 from the bottom face. It is an enlarged view of the brake lever part. It is explanatory drawing which shows the brake braking structure. It is a rear view of the cart. It is the fragmentary perspective view which looked at the trolley | bogie of Example 2 from the bottom face. It is the fragmentary perspective view which looked at the trolley | bogie of the reference example 1 from the bottom face. (A) is a partial back view which shows the same brake release state, (b) is a partial back view which shows the same brake state. It is the partial rear view which looked at the braking structure of the trolley | bogie of the reference example 2 from the back surface. It is the same partial side view. It is the fragmentary perspective view which looked at the braking structure of the trolley | bogie of the reference example 3 from the back bottom part side. 10 is a partial side view of Reference Example 3. FIG. 10 is a partial side view of Reference Example 4. FIG.

  According to the present invention, a brake wire capable of braking a wheel provided on the bottom surface of a carriage bed by operating a brake lever portion is attached through the loading platform, and the brake shoe portion is biased in a braking release direction by a coil spring. By doing so, waste of the handling of the brake wire was eliminated, and the certainty of the operation of brake braking or braking release was realized.

A preferred embodiment of a braking structure for a carriage according to the present invention will be described below with reference to the drawings.
[Cart]
As shown in FIGS. 1 to 5, the carriage 10 includes a rectangular loading platform 2, a substantially laterally U-shaped handle 4 erected near one side (rear in the illustrated example) on the loading platform 2, and a loading platform. 2 comprises a pair of left and right rear wheels 3 provided rearward at the lower part and a braking structure 1 for braking the rear wheels 3.

[Brake structure]
As shown in FIG. 1, the braking structure 1 of the present embodiment has a schematic configuration of a brake lever portion 5, a brake shoe portion 13, and a brake cable 7 interposed therebetween.
In FIG. 1, for convenience of explanation, the support yoke 3 a and the support piece 11 of the wheel 3 on the right side in the drawing are omitted.

[Brake lever part]
As shown in FIG. 3, the brake lever portion 5 is pivotally attached to a bracket 6 fixed to the handle 4.
In the present embodiment, the brake lever portion 5 is attached to one corner portion of the lateral pipe above the handle 4, but it can be attached to any position of the handle 4.
The bracket 6 includes a band portion 6a that is externally fitted and fixed to an arbitrary portion of the pipe-shaped handle 4, and a support portion 6b that rises outward from the band portion 6a and pivotally attaches to the distal end side of the brake lever portion 5. It is made up of.
The pipe 4a of the handle 4 is used as a grip (see FIG. 3).

[Brake cable]
The brake cable 7 is a Bowden cable in which an inner cable 7b is inserted into an outer cable 7a. The brake cable 7 extends along the handle 4 and extends to the loading platform 2 side.
One end of the outer cable 7a is fixed to the tip of the support portion 6b.
The inner cable 7 b extends from one end of the outer cable 7 a and is connected to the tip of the brake lever portion 5.

[Cable receiving part]
The other end of the outer cable 7 a is fixed to a cable receiving portion 9 attached to the recess 2 a on the upper surface of the loading platform 2.
The cable receiving portion 9 has an upper flange portion 9a having a cylindrical portion 9b for fixing the outer cable 7a at the center, and the upper flange portion 9a is fitted into a recess formed on the upper surface of the loading platform without any gaps. 2 is set on the same plane as the upper surface of 2 (see FIG. 4).
The inner cable 7 b passes through the hollow portion of the cable receiving portion 9 and passes through the through hole 2 b formed in the loading platform 2 toward the bottom of the loading platform 2.

  On the bottom surface of the loading platform 2, a concave portion 2 c is formed on the bottom surface of the loading platform that opens downward, facing the concave portion 2 a on the top surface of the loading platform 2 with the lower end opening of the through hole 2 b as the center. Has a hole communicating with the through-hole 2b, and is fitted with a washer-shaped receiving plate 8 that abuts an upper portion of a coil spring described later.

  The inner cable 7b is pulled out from the outer cable 7a at the cable receiving portion 9, passes through the through hole 2b of the loading platform 2, is pulled out to the bottom of the loading platform 2, and is fixed to the cable connecting portion 14 of the working piece 15 described later. The

  When the brake lever 5 is operated, the brake cable 7 is operated, and the inner cable 7b is expanded and contracted to pivot the operating piece 15 via the cable connecting portion 14, and the brake shoe portion 13 is connected to the wheel 3 via the shaft portion 12. It moves in the braking direction or the braking release direction.

[Supporting piece]
In the illustrated example, the support piece 11 includes a loading platform fixing portion 11a that is fixed to the bottom surface of the loading platform 2 with screws and the like, and a shaft support portion 11b that hangs down from the loading platform fixing portion 11a and supports the shaft portion 12. Yes.
In the present embodiment, the support piece 11 is disposed outside the support yoke 3 a outside the carriage of the rear wheel 3, and is a long shaft portion 12 that extends horizontally across the upper gap between the left and right wheels 3. It pivots on both ends.

[Shaft]
The shaft portion 12 is constrained by a stopper so that it does not fall off from the shaft support portion 11 b of the support piece 11.
In this embodiment, the shaft portion 12 is made of a single pipe or saddle material, and the base end side of the operating piece 15 protruding toward one side (the rear of the loading platform in the illustrated example) is fixed at the center. Is fixed to the base end side of a pair of left and right brake shoe portions 13 that protrudes in the opposite direction to the operating piece 15 (in the illustrated example, in front of the loading platform).

[Operating piece]
In the case of this embodiment, the operating piece 15 is arranged so that the distal end side is aligned with the hanging position of the cable receiving portion 9, and the cable connecting portion 14 is formed at the hanging position.
In the present embodiment, as shown in FIG. 1, the operating piece 15 has a pair of side wall surfaces 15a fixed to the shaft portion 12 in a triangular shape in which the fixing side is set wide, and the pair of side wall surfaces 15a A bottom wall 15b is formed so as to connect the bottom side.

[Cable connection part]
A hole through which the inner cable 7b is passed is formed in the center of the bottom side of the bottom wall 15b, and a cylinder part 14a having a hole communicating with the hole is formed on the back side of the bottom wall 15b. The cylinder part 14a A cable fixing screw 14b is screwed so as to be orthogonal to the hole of the cable to form a cable connecting portion 14 for fixing the tip of the inner cable 7b (see FIG. 4).
Accordingly, the tip of the inner cable 7b is passed through the hole of the bottom wall 15b through the hole of the cylindrical portion 14a, and is fastened with the fixing screw 14b to be fixed to the operating piece 15.

[coil spring]
A recess 2c having a lower end opening of the through hole 2b is formed on the bottom surface of the loading platform 2 corresponding to the cable receiving portion 9, and a coil spring is provided between the inner bottom of the recess 2c and the operating piece 15. 16 is interposed.
In the illustrated example, the receiving plate 8 is fitted to the inner bottom portion of the recess 2 c and abuts with the upper end of the coil spring 16.
The coil spring 16 is externally fitted to the inner cable 7b that is pulled out from the through hole 2b and fixed to the cable connecting portion 14 of the operating piece 15 as a core material.

[Brake shoe part]
In the present embodiment, the brake shoe portion 13 is composed of a pair of triangular side wall surfaces 13a and a bottom wall surface 13b that closes the bottom side of the side wall surface 13a, like the operation piece 15. Since 13b becomes an abutting surface with the tread surface of the wheel 3, non-slip portions such as irregularities for increasing friction are formed (see FIG. 1).
When the shaft portion 12 is pivoted, the bottom wall surface 13b of the brake shoe portion 13 tilts downward from an upper position that is separated from the trad surface of the wheel 3, and abuts against the tread surface of the wheel 3 and presses. The wheel 3 is braked.

  Accordingly, by pulling the lever of the brake lever portion 5 toward the handle 4a, the inner cable 7b is pulled upward, the coil spring 16 is compressed, the operating piece 15 is pulled up, and the shaft portion 12 is pivoted. The brake shoe portion 13 protruding in the direction opposite to the direction 15 is pivoted downward and pressed against the tread surface of the wheel 3 for braking.

  When no force is applied to the brake lever portion 5, the inner cable 7b returns to its original length as lifted by the brake lever portion 5, the coil spring 16 expands by a repulsive force, and pushes down the operating piece 15 downward. The shaft portion 12 is pivoted in the opposite direction to pivot the brake shoe portion 13 in a direction away from the braking position upward, and is released from the tread surface of the wheel 3 to release the braking.

  In the present embodiment, the case where a pedal type braking structure as disclosed in JP 2010-163056 is used together as the braking structure of the wheel 3 is illustrated. However, even a cart equipped with such an existing braking structure may be used. The braking structure 1 of the present embodiment can be added later using a gap.

FIG. 6 shows a braking structure for a cart according to the second embodiment.
As in the first embodiment, the braking structure 1 of the carriage is a structure that controls the pair of brake shoe portions 13 in conjunction with the shaft portion 12, and the support piece 11 of the shaft portion 12 is formed separately. Instead, the case where the support yoke 3a outside the loading platform straddling the tread surface of the wheel 3 is used as a support piece instead is shown.

  The shaft portion 12 passes through the shaft portion 12 at a position higher than the wheels so as not to contact the wheels, and is supported by the support yoke 31 so as not to contact the wheels. The stopper 12a that restrains the end of the shaft portion 12 is provided so that the shaft portion 12 does not come off from the other support yoke 3a.

In the second embodiment, the operating piece 15 is made of a saddle member having a substantially rectangular cross section, and the base end is fixed to the shaft portion 12, and the distal end portion of the operating piece 15 serves as the cable connecting portion 14 to connect the inner cable 7 b. It has a through-hole that passes vertically, and a fixing screw 14b is screwed in perpendicular to the through-hole.
Accordingly, the inner cable 7 b can be passed through the through hole of the cable connecting portion 14 and the inner cable 7 b can be fixed to the operating piece 15 with the tightening screw 14 b.

Further, a coil spring 16 is interposed between the spring receiving plate 8 (not shown in FIG. 4 because it is the same as FIG. 4) and the operating piece 15 so as to fit the inner cable 7b, so that the brake releasing direction is provided. Can be energized.
Since other configurations are the same as those of the first embodiment, the description thereof is omitted.

[Reference Example 1]
Next, FIG. 7 to FIG. 8 show a braking structure for a cart of Reference Example 1 that is not included in the present invention .
In the braking structure 1 of the carriage, as in the first embodiment, the support piece 11 is formed separately from the wheel 3 on the outside thereof, and a pair of shaft parts 12 slidably attached to the support piece 11 are attached to the support piece 11. The brake shoe portion 13 is formed integrally.

The support piece 11 is disposed further outside the support bed of the support yoke 3 a that is outside the load bed 2 of the wheel 3, and is fixed to the bottom of the load bed 2.
In the case of the illustrated example, the shaft portion 12 is made of a saddle member having a quadrangular cross section, and a brake shoe portion 13 that is bent substantially in a letter shape and protrudes to one side is integrally formed on both sides of the shaft portion 12. .
The shaft portion 12 is attached to be slidable in the lateral direction without rotating with respect to the support piece 11 and reciprocates on the same line.
In the first reference example , a coil spring 16 is interposed between the shaft portion 12 and the one support piece 11 so as to be urged in the braking release direction.

The tip end of the inner cable 7b is fixed to the tip end of the shaft portion 12 via a roller-type guide portion 15 ′.
That is, the inner cable 7 b extends downward from the cable receiving portion 9, penetrates the loading platform 2, and is attached to a support plate 11 ′ provided on the support piece 11 opposite to the support piece 11 to which the coil spring 16 is attached. Fixed.
The support plate 11 ′ is composed of one side wall of a hollow box-like support box 18 fixed to the bottom of the loading platform 2, and the bottom wall plate of the support box 18 has a roller-type guide portion that rotates sideways. 15 ′ is fixed, and the tip of the inner cable 7b whose direction is changed via the roller of the guide portion 15 ′ is fixed to the tip of the shaft portion 12 protruding into the support box 18.

  Accordingly, when the brake lever portion 5 is pulled, the inner cable 7b is pulled and the shaft portion 12 is pulled toward the guide portion 15 ′ while compressing the coil spring 16, and the pair of brake shoe portions 13 bite into the tread surface of the wheel 3. To brake the wheel (see FIG. 8B).

  When the brake lever portion 5 is released, the inner cable 7b is returned, the shaft portion 12 slides in the opposite direction by the repulsive force of the coil spring 16, and the pair of brake shoe portions 13 are separated from the tread surface of the wheel 3. Thus, the braking of the wheel is released (see FIG. 8A).

  Thus, as in the above embodiments, the inner cable 7b is pulled or released by the lever operation of the brake lever portion 5 (not shown), the shaft portion 12 is slid and displaced, and the brake shoe portion 13 is moved to the tread of the wheel 3. It is possible to control the brake position to be pressed against the surface and the brake release position to be separated.

[Reference Example 2 ]
The braking structure of the cart of Reference Example 2 is shown in FIGS.
In the braking structure 1 of the carriage, the support piece 11 is formed separately as in the first embodiment, but the braking of the wheels 3 is performed individually for each wheel 3.
For this purpose, the handle 4 is provided with a pair of left and right brake lever portions 5, from which brake cables 7 are arranged along the handle to the loading platform 2, and the tip of the outer cable 7a is fixed by the cable receiving portion 9, and the inner cable 7b is Since the point pulled out to the loading platform bottom side is the same as in the above embodiment, the illustration is omitted.

The brake shoe portion 13 is L-shaped in plan view, and is composed of a side piece 13a that is bent in a square shape and a braking piece 13b that is bent at a right angle at the tip, and has an L-shape in plan view.
Further, a support piece 11 that is fixed to the bottom surface of the loading platform 2 and protrudes downward is provided on the outside of the support yoke 3 a of the wheel 3.
A bent portion at the center of the side piece 13a is pivotally attached to the support piece 11 by a shaft portion 12 serving as a pivot, and the support piece 11 cantilevers the brake shoe portion 13 in a pivotable manner.

  The support pieces 11 may be provided in a pair of left and right with respect to one wheel 3, and in that case, the brake shoe portion 13 is formed in a U shape in plan view in which the pair of left and right side pieces 13a are connected by a brake piece 13b. (Not shown).

The support piece 11 is provided with a guide piece 11c that is bent toward the wheel 3 at a location that is spaced apart from the distal end of the side piece 13a of the brake shoe portion 13 and faces the base end side.
Further, the base end side of the side piece 13 a of the brake shoe portion 13 is also bent toward the wheel 3 side to form an operating piece 15, and has a cable connecting portion 14.
Therefore, the inner cable 7b that has passed through the loading platform 2 and led to the bottom passes through the hole of the guide piece 11c and is fixed to the cable connecting portion 14 of the operating piece 15 of the brake shoe portion 13.

As a result, the brake shoe portion 13 pivots in the braking direction via the cable connecting portion 14 by pulling the inner cable 7b of the brake lever portion 5, and the braking piece 13b is pressed against the tread surface of the wheel 3 for braking.
When the brake lever portion 5 is released, the inner cable 7b returns to the original position, so that the brake shoe portion 13 pivots in the braking release direction, and the braking piece 13b is separated from the tread surface of the wheel 3.

  Here, in order to urge the brake shoe portion 13 in the braking release direction, a coil spring is externally fitted to the inner cable 7b between the guide piece 11c and the cable connecting portion 14, or the pivot shaft 12 and the brake shoe portion 13 are fitted. It is preferable to provide a biasing means such as a spring between the two.

[Reference Example 3 ]
In Figure 11 and the braking structure of the bogie 1 of Reference Example 2 shown in FIG. 12, has become a brake mechanism for braking of individual wheels 3 in the same manner as in Reference Example 2, Reference Example 2 brake shoe 13 wheels The reference shoe 3 is different in that the brake shoe portion 13 is pressed against the tread surface at the rear position of the loading platform of the wheel.

In the reference example 2 , the guide piece 11c of the support piece 11 is provided on the front side of the loading platform with respect to the wheel 3, and the lever piece 13a of the brake shoe portion 13 extends toward the front of the loading platform of the wheel 3. Since the pressing piece 13c is bent at the tip, the pressing piece 13c can be brought into contact with the support yoke on the trad surface in front of the loading platform, and the operating piece 15 is separated from the guide piece 11c. 3 is arranged behind the loading platform.

On the other hand, in Reference Example 3 , the guide piece 11c of the support piece 11 is provided on the rear side of the loading platform with respect to the wheel 3, and the side piece 13a of the brake shoe portion 13 is directed toward the rear of the loading platform of the wheel 3. Since the brake piece 13b is bent at the tip, the brake 13b can be brought into contact with the support yoke on the trad surface behind the loading platform, and the operating piece 15 is separated from the guide piece 11c. It arrange | positions at the loading platform front side of the wheel 3 so that it may do.

[Reference Example 4 ]
FIG. 13 shows the braking structure of the cart of Reference Example 4 .
In the braking structure 1 of this carriage, instead of the support piece 11 of Reference Example 1, the support yoke 3a of the wheel 3 is also used as the support piece 11.
The side piece 13a of the brake shoe portion 13 is pivotally attached to the outside of the support yoke 3a by the shaft portion 12.

Therefore, the guide piece 11c is formed to be bent outward (in a direction away from the wheel) from the support yoke 3a.
Similarly, the cable connecting portion 14 provided at the base end of the side piece 13a is formed by bending toward the outside of the support yoke 3a (in the direction away from the wheel).
And the inner cable 7b pulled out from the bottom part of the loading platform 2 passes through the hole of the guide piece 11c, and the tip is fixed to the cable connecting part 14 facing the guide piece 11c.
Since other configurations are the same as those of the first reference example, description thereof is omitted.
As a result, the braking or releasing of the wheel 3 can be controlled by operating the brake lever portion 5 as in the above embodiments.

  In addition, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Brake structure 2 Loading platform 2a Top surface recessed part 2b Through-hole 2c Bottom surface recessed part 3 Wheel 3a Support yoke 4 Handle 4a Pipe 5 Brake lever part 6 Bracket 6a Band part 6b Bearing part 7 Brake cable 7a Outer cable 7b Inner cable 9 Cable receiving part 9a Upper flange part 10 Carriage 11 Supporting piece 11a Loading platform fixing part 11b Shaft support part 11c Guide piece 12 Shaft part 12a Stopper 13 Brake shoe part 13a Side wall side piece 13b Bottom wall surface Braking piece 14 Cable connecting part 14a Tube part 14b Screw 15 Acting piece 15a Side wall surface 15b Bottom wall 16 Coil spring 18 Support box

Claims (3)

In the brake structure that has a pair of left and right wheels before and after the bottom of the loading platform of the carriage and simultaneously brakes or releases the braking of the left and right pair of wheels on either side of the carriage with a handle protruding on the upper surface of the loading platform,
A brake lever part pivotally attached to a bracket fixed to the handle;
An inner cable is inserted into the outer cable, one end of the outer cable is connected to the tip of the bracket, one end of the inner cable is connected to the tip of the brake lever, and the other end of the outer cable is connected to the loading platform. A brake cable fixed to the cable receiving portion provided, and extending to the bottom of the loading platform through the through hole of the loading platform where the inner cable communicates with the hole of the cable receiving portion;
A pair of left and right support pieces fixed to the bottom of the cargo bed,
A shaft pivotally attached to the pair of support pieces and horizontally spanned in an upper gap between the left and right wheels ;
A base end fixed to the shaft portion, and a pair of brake shoe portions for braking or releasing the pair of left and right wheels; and
An operation piece fixed to the shaft portion and formed with a cable connecting portion for connecting the other end of the inner cable,
The operating piece protrudes toward the rear of the loading platform at the center of the shaft portion, and the brake shoe portion protrudes in a pair on the left and right sides of the shaft portion toward the front of the loading platform opposite to the operating piece,
By operating the brake lever portion, the shaft portion is pivoted by the operating piece , the pair of left and right brake shoe portions are tilted downward from the upper position , pressed against the tread surface of the pair of left and right wheels, and braked to separate. A brake structure for a carriage, wherein the brake is released.   A coil spring is interposed between the bottom surface of the loading platform facing the cable receiving portion and the cable connection portion and fitted to the inner cable extending from the through hole of the loading platform, and the brake shoe portion is biased in the braking release direction. The carriage brake structure according to claim 1, wherein: 2. The brake structure for a carriage according to claim 1, wherein the support piece of the shaft portion is also used as a support piece that is a support yoke outside the loading platform straddling the tread surface of the wheel .

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