JPH0872725A - Brake device of cart - Google Patents

Abstract

PURPOSE: To provide a cart brake device whose parts number is reduced and whose constitution is simplified and which is excellent costwise and whose assembly manday is reduced as processing, positioning, fitting, adjustment or the like are easy and simplified and do not require a long time and lastly whose action is accurate and which has few disorders. CONSTITUTION: This brake device is arranged with, between a brake pedal 19 and a brake member 25, a connection member 21 whose one end portion is pivotingly attached to the other end side 31 of the brake pedal 19 by means of a pin 32; a right and left rod 22 fitted to the other end portion of the connection member 21 and movable up and down; and a brake lever 24 that is positioned between the right and left rod 22 and the brake member 25 and can be swung and displaced into a brake release posture C and a brake posture D. The right and left rod 22 is guided by the upper and lower guide grooves of a holder 23, and brake and brake release are executed by the brake member 25 being contactingly pressed against and being separated from a caster 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for a cart. That is, the present invention relates to a brake device in a cart that has, for example, a box-shaped caster, and stores articles for various services.

[0002]

2. Description of the Related Art FIGS. 6A and 6B show a conventional brake device for a cart of this type. FIG. 6A is a front explanatory view, and FIG. As shown in the figure, in this type of brake device, a brake member 4 such as a brake shoe is attached to a caster 3 attached below the floor surface 2 of the cart body 1.
Brake and brake release are performed by pressing and releasing. Then, by pressing the free end side of the brake petal 6 and the release petal 7 mounted on the horizontal left and right shafts 5 near the front and rear ends of the floor surface 2 of the cart body 1, the brake member 4 is pressed against the caster 3, Separated, braked and released. Now, as also shown in the same figure, in the conventional brake device of this kind, between such a brake petal 6 and the brake member 4, a pin 8 is provided in order from the brake petal 6 side to the other end side of the brake petal 6. And a connecting member 9 whose lower end is pivotally attached to the connecting member 9.
An upper end of the arm 12 is pivotally attached by a pin 10 and can swing up and down about a fulcrum 11;
The adjusting screw 13 provided upright on the tip of the adjusting screw 13 and the lever 14 with which the upper end of the adjusting screw 13 abuts on one end thereof are arranged, and the upper end of the brake member 4 abuts on the lower end of the lever 14. . Reference numeral 15 is a spring that constantly biases the brake member 4 upward.

When the brake is applied from the brake release state (movable by the casters 3) shown by the solid line in the figure, first, the free end side of the brake petal 6 is pushed down, so that the pin 8, the connecting member 9, Since the tip end side of the arm 12 rises around the fulcrum 11 and the adjustment screw 13 also rises via the pin 10 and the like, one end side of the lever 14 rises and the other end side descends, and the brake member 4 attaches to the spring 15. It is pushed down against the power and presses against the casters 3 to brake.

The other end of the brake petal 6, the pin 8, the connecting member 9 and the like are bent straight to the right around the pin 8 as indicated by the solid line in the figure, and then extend vertically (arm 12, adjust). After slightly passing the screw 13 and the like at the highest position), the other end of the brake petal 6 abuts on a stopper (not shown), and at the time of braking, as shown by an imaginary line in the figure. , It is in a slightly bent state on the opposite left side. In this way, since it passes through the vertical straight line state and is slightly bent as shown by an imaginary line, the lever 14 and the lever 14 are urged by the urging force of the spring 15 that constantly urges the brake member 4 upward.
The force for returning the brake petal 6 to the original state indicated by the solid line through the adjusting screw 13, the arm 12, the connecting member 9 and the like does not act. Therefore, even if the foot is removed from the free end side of the brake petal 6, the brake state in which the brake member 4 is pressed against the caster 3 is locked, and the brake state is maintained as it is. Further, when releasing the brake, the free end side of the release petal 7 beside the brake petal 6 is pushed down so that the bar 17 pivotally attached to the other end by the pin 16 and other link mechanism (not shown). Via the bar 18, the pin 8 is pulled back from the position indicated by the imaginary line in the figure to the position indicated by the solid line, and the brake is released.

[0005]

By the way, the following problems have been pointed out in such a conventional example. That is, as described above, in the conventional cart braking device,
In order from the brake petal 6 side, a pin 8, a connecting member 9, a pin 10, an arm 12 having a cantilever structure, a fulcrum 11 thereof, an adjusting screw 13 erected on the arm 12, a lever 14 abutting this, and the like are brake members. It was interposed between 4 and 4. Also, lock / hold the brake state with pin 8
Was carried out by the lateral movement of. Therefore, as for the conventional brake device, firstly, the number of parts is large, and the configuration is complicated, so that the cost of parts is very high.
Problems were pointed out in terms of cost. Secondly, since the number of parts is large and the configuration is complicated, processing, alignment,
Problems such as assembly man-hours have been pointed out as high precision is required for mounting and adjustment, and it takes a long time. Thirdly, similarly, the number of parts is large and the configuration is complicated, and since the structure is particularly made to use many links, there are problems in terms of quality, such as concern about accuracy of operation and many failures. .

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional example, in which a connecting member, left and right rods, a brake bar, and the like are sequentially provided between the brake petal and the brake member. By arranging and arranging the left and right rods in the upper and lower guide grooves of the holder, firstly, the number of parts is reduced and the structure is simplified, and secondly, the assembly is easy and easy. Thirdly, it is an object of the present invention to propose a braking device for a cart that is accurate in operation and has few failures.

[0007]

The technical means of the present invention for achieving this object is as follows. This cart braking device has the following brake petals, stoppers, connecting members, left and right rods, holders with upper and lower guide grooves, brake bars, casters, and brake members.
That is, a brake petal that has a substantially L-shape, is attached so that its center is swingable around the lower left and right ends of the cart main body with horizontal left and right shafts, and one end is a free end that can be pushed down, and the brake petal. A stopper that can come into contact with the other end and has a swing limit, a connecting member whose one end is pivotally attached to the other end of the brake petal with a horizontal pin, and is attached to the other end of the connecting member. The left and right rods that can be moved up and down between the lowered position, the highest lifted position, and the quasi-raised position, a holder that is fixed below the cart body and that includes a vertical guide groove that guides the left and right rods, and the following brake bar, It has casters and brake members.

The center portion of the brake bar is swingably supported under the cart body so that one end of the brake bar corresponds to the left and right rods and the other end of the brake bar corresponds to the brake member. The brake release posture in which the other end does not act on the brake member when in the lowered position, and next, when the left and right rods are in the semi-elevated position, the one end is pushed up by the left and right rods. The other end is capable of swinging displacement in a braking posture in which the brake member is pushed down. The caster is attached below the cart body. The brake member is urged upward by a spring while being interposed between the other end of the brake bar and the caster. First, when the brake bar is in the brake release posture, the brake member is located below the caster. On the other hand, when the brake release position is higher than the brake release position with a space left between the brake bar and the brake bar, the other end of the brake bar is pushed down to the caster side and pressed against the caster. It can move up and down to the lower brake position.

[0009]

Since the present invention comprises such means, it operates as follows. This cart braking device has a connecting member, left and right rods, between the brake petal and the brake member,
Brake bars etc. are arranged in order, and a structure is adopted in which the left and right rods are guided by the upper and lower guide grooves of the holder.
When braking is performed, when the brake petal is pressed, the left and right rods are guided by the upper and lower guide grooves of the holder via the connecting member and moved from the lowered position to the semi-elevated position through the highest lifted position. So the brake bar
Since one end is pushed up by the left and right rods to assume a braking posture, the brake member is pushed down by the other end of the brake bar against the biasing force of the spring, is displaced to the brake position, and is pressed against the caster. In this way, braking is performed.

After that, the brake state is maintained until the brake is released by the release petal. That is, in the braking state, the other end of the brake petal comes into contact with the stopper so that the left and right rods are fixedly positioned at the quasi-elevated position after passing through the maximum ascended position, and the left and right rods, the connecting member, the pin, and the brake petal are positioned. The other end and the like are fixedly positioned in a state in which, after having undergone a vertical straight line state, they are slightly bent to the side opposite to the past with the pin as the center. Therefore, the force from the spring that biases the brake member upward is blocked by such fixed positioning, and the force that returns the left and right rods to the lowered position to the state before pressing the brake petal does not act. On the contrary, by such a fixed positioning, the brake bar is positioned in the braking posture and the braking member is positioned in the braking position as it is, and the braking state is maintained even if the foot is removed from the brake petal.

Then, first, in this cart braking device, the connecting member, the left and right rods, and the brake bar are arranged in order between the brake petal and the brake member, and
The structure in which the left and right rods are guided by the upper and lower guide grooves of the holder reduces the number of parts and simplifies the configuration. Secondly, because the number of parts is reduced and the configuration is simplified, processing, alignment, and
Easy to install and adjust. Thirdly, the number of parts is reduced and the structure is simplified, and especially since the left and right rods are guided by the upper and lower guide grooves of the holder, the operation is extremely stable and accurate, and there are few failures.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
Shows an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a bottom view, FIG. 3 is a side view when the casters are movable, and FIG.
FIG. 5 is a side view illustrating a state when the brake is applied, and FIG. 5 is a side view illustrating a state when the brake is released. FIG. 7 is a schematic perspective view of the cart.

First, as shown in FIG. 7, the cart main body 1 has, for example, a box shape, and casters 3 as wheels are provided below four corners of the floor surface 2. For example, the inside of an airplane or a bullet train vehicle It is used by crew members to provide food and drink services to passengers. Then, the brake device of this cart firstly includes a brake petal 19, a stopper 20, a connecting member 21, a left and right rod 22, a holder 23, a brake bar 24, a brake member 25, and the like described below.

As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 7, etc., the brake petal 19 has a substantially L shape, and the center is in front of and behind the floor surface 2 of the cart body 1. It is swingably mounted on the horizontal left and right shafts 26 near the bottom of the end, and one end side 27
Is a free end and can be pressed. That is, the brake petal 19 is installed together with a release petal 28, which will be described later, and is swingably attached up and down by a left and right shaft 26 that is held horizontally below the floor surface 2, and one end side 27 is stepped on with a foot. As a result, the state shown in FIG. 3 is depressed to the state shown in FIG. Reference numeral 29 denotes a petal bracket. The petal bracket 29 is fixed below the floor surface 2 of the cart main body 1, holds the left and right shafts 26, and is formed with a stopper 20, a holder 23, a hanging portion 30, etc. described below. ， Fixed And stopper 20
As shown in FIG. 4, can contact the other end 31 of the brake petal 19 and reaches its swing limit. That is, the stopper 20 is located opposite to the end on the other end side 31 side of the brake petal 19, and when the one end side 27 of the brake petal 19 is not pushed down, as shown in FIG. 3 and FIG. When there is a gap between the end side 31 and the one end side 27 of the brake petal 19 is pushed down, as shown in FIG. Therefore, it becomes a dead point and regulates the swing limit.

Next, as shown in FIG. 1, FIG. 3, FIG. 4, FIG. 5, etc., the connecting member 21 has a horizontal pin 32 on the other end 31 of the brake petal 19, and one end of the connecting member 21 is pivoted. It is worn. That is, the connecting member 21 is composed of a link plate for connection, and the end on the other end side 31 of the brake petal 19 is pivotally attached to a lower end portion thereof by a horizontal pin 32, and is driven by the brake petal 19. , It is possible to swing on a vertical surface.

The left and right rods 22 are connected to the connecting member 2 as described above.
1 is attached to the other end on the upper side of 1 by pivoting or fixing, is held and driven by the connecting member 21, and is in the descending position A shown in FIGS. 1, 3 and 5 and the highest rising position (not shown). ) And Fig. 4
It is possible to move up and down between the semi-elevated position B shown in FIG. The semi-elevated position B is slightly lower than the highest position, but much higher than the descent position A. next,
As shown in FIG. 1, the holder 23 has a downward U-shaped cross section and has a petal bracket 2 on the floor 2 of the cart body 1.
As shown in FIGS. 3, 4, and 5, etc., vertical vertical guide grooves 33 are formed in the central portion in the left-right direction of FIG. ing.
The columnar central portions of the left and right rods 22 are inserted in the left and right guide grooves 33 in the left-right direction, and the left and right rods 22 are regulated, held, and guided by the upper and lower guide grooves 33. , The descending position A, the highest position,
The semi-elevated position B and the like can be moved up and down.

Next, as shown in FIGS. 1 and 2, the brake bar 24 has a petal bracket 29 under the cart body 1.
With respect to the hanging portion 30, the center of the hanging portion 30 is pivotally supported by a pin (not shown) in the front-rear direction, one end 34 is positioned corresponding to the left and right rods 22, and the other end 35 is the brake member 25. Is located corresponding to. That is, in the illustrated example, the brake members 25 are respectively arranged on the left and right corresponding to the left and right casters 3, and the brake bars 24 are also arranged in a pair of left and right, and one end 34 of each is on the end of the left and right rod 22. Is attached to or opposed to each other, and the other ends 35 are attached to or opposed to both brake members 25, respectively. When the left and right rods 22 are in the lowered position A, the brake bars 24 are separated from each other so that one end 34 of the brake bars 24 is not acted on by the left and right rods 22 and the other end 35 is not acted on by the brake member 25. , Take a brake release posture C shown by a solid line in FIG. Next, when both the left and right rods 22 are at the maximum raised position or the semi-elevated position B (see FIG. 4), both brake bars 24 are pushed up by the left and right rods 22 with which one end 34 abuts, and the other end 35 brakes. The brake posture D shown in phantom in FIG. 1 in which the member 25 is brought into contact and pushed down is taken. In this way, the brake bar 24 can be swingably displaced between the brake releasing posture C and the brake posture D.

As shown in FIG. 1, the two brake members 25 respectively have the other ends 35 of the upper brake bars 24,
While being interposed between the lower casters 3, it is biased upward by a spring 36. Brake member 2 in the illustrated example
5 has an inverted T-shaped cross section, and is composed of a lower flat brake shoe 37 made of rubber excellent in frictional force and an upper vertical axis 38. When the brake bar 24 takes the brake releasing posture C shown by the solid line in FIG. 1, the brake members 25 are separated from the lower caster 3 with a space therebetween, and the brake releasing position is higher (not shown). )I take the. Next, when the brake bar 24 takes the brake posture D shown by the imaginary line in FIG. 1, each of the brake members 25 is pushed down by the other end 35 of the brake bar 24 toward the lower caster 3 side and pressed against the caster 3. Take the lower brake position E. In this way, both brake members 25
Can move up and down between the upper brake release position and the lower brake position E.

This cart braking device includes a brake petal 19, a stopper 20, a connecting member 21, left and right rods 22, a holder 23, and a brake bar 2 as described above.
4, the brake member 25, and the like. In the illustrated embodiment, as shown in FIG. 2, such brake devices are provided in front of and behind the cart body 1, respectively.
Therefore, in this one cart, front and rear two brake petals 19, front and rear two stoppers 20, front and rear two connecting members 21, front and rear two left and right rods 22, front and rear two holders 23, front and rear meters. Four brake bars 24, a total of four brake members 25 in the front and rear, and the like are provided.

Now, as shown in FIG. 2, the brake devices provided at the front and rear are designed to operate in conjunction with each other. That is, as shown in FIGS. 3, 4, and 5, the connecting members 21 are pivotally attached to the other ends 31 of the front and rear brake petals 19 by the above-described horizontal pins 32, respectively. A base end 40 of the first bar 39 is pivotally attached. Both of the first bars 39 are movable along the axial direction thereof under the floor surface 2 of the cart body 1, and the tips 41 thereof are respectively attached to different ends of the link member 42 by pivoting or the like. Installed. As shown in FIG. 2, the link member 42 has a pin 43 whose center is vertical.
Is pivotally attached to the lower center of the floor surface 2 of the cart body 1 and is horizontally rotatable. Therefore, when one of the brake petals 19 of the front and rear brake devices is pressed, the first bar 39 on one side is pulled and moved, for example, in the S direction shown by the arrow in the figure, and the link member 42 moves in the T direction shown by the arrow in the figure. When the other first bar 39 also moves in the S direction shown by the arrow in the figure, the brake petal 1 of the other brake device is rotated.
9 is also forcibly pressed. In this way,
The brake petals 19 of the front and rear brake devices are both pressed, and the brakes are implemented in conjunction with each other. In the illustrated example, all four casters 3 are brought into the brake state by the brake member 25.

Next, the release petal 28 will be described in detail with reference to FIG. 1, FIG. 2, FIG. 3, FIG. The release petal 28 is substantially L-shaped, and the center thereof is swingably attached to the lower left and right ends of the floor surface 2 of the cart body 1 by a horizontal left and right shaft 44, and one end side 45 is a free end. It can be pressed. That is, the release petal 28 is juxtaposed with the brake petal 19 described above, and the left and right shafts 44 of the release petal 28 are also held by the petal bracket 29, so that the state shown in FIGS. 3 and 4 is changed to the state shown in FIG. It can be pressed. The release petal 28 is provided with a spring 46 that constantly urges the release petal 28 upward. The above-described pressing is performed against the urging force of the spring 46, and at the same time, one end of the release petal 28 is pressed. When the foot is removed from 45, the release petal 28 immediately returns to its original undepressed state by the biasing force of the spring 46.

As shown in FIG. 2, FIG. 3, FIG. 4, FIG. 5, etc., the second bar 47 is movable under the floor surface 2 of the cart main body 1 along its axial direction so as to be braked. Arranged parallel to the first bar 39 of the device, the tip 48 of the second bar 47 is pivotally attached or otherwise attached to one end of the link member 42 described above. The tip 48 of the second bar 47 is attached to one end of the link member 42 to which the first bar 39 of the brake device is not attached. And this second bar 4
The base end 49 of 7 and the other end 50 of the release petal 28 are
The following relationships are set. First, when the brake petal 19 is not pressed, as shown in FIG. 3, the two are positioned with a space U in front and back, and then when the brake petal 19 is pressed, the first Bar 39,
As shown in FIG. 4 via the link member 42, the second bar 47, and the like, both are in abutting engagement, and when the release petal 28 is pushed down in this state, they remain in abutting engagement. It is pulled to the right side in the drawing, and the second bar 47 and the link member 4 are drawn.
2, via the first bar 39 or the like, the depression of the brake petal 19 is released as shown in FIG. 5 (at the same time, the depression of the brake petal 19 of the other brake device is also released. See below).

In the illustrated example, as an example of such a configuration, as shown in FIGS. 3, 4 and 5, the second bar 47 is used.
A connecting elongated hole 51 is formed in the axial direction immediately before the base end 49, and a pin 52 is projectingly provided at the other end 50 of the release petal 28. And this pin 52
It is fitted into the connection elongated hole 51 and is relatively movable with respect to the connection elongated hole 51 along the axial direction thereof.

Therefore, first, when the caster 3 is movable without the brake petal 19 being pushed down, as shown in FIG. 3, the release petal 28 other than the release petal 28 is provided at the left end of the connecting elongated hole 51 of the second bar 47 in the drawing. Pin 52 on the end side 50
But it is located. That is, the space U formed by the connection elongated hole 51 is provided between the base end 49 of the second bar 47 located at the right end of the connection elongated hole 51 and the pin 52 on the other end side 50 of the release petal 28. I have it.

Next, when the brake petal 19 is pushed down in this state, as shown in FIG. 2, the first bar 39 is pulled and moved in the S direction shown by the arrow in the figure, and the link member 42 is shown by the arrow in the figure. The second bar 47 moves in the T direction shown in the drawing, and the second bar 47 moves in the V direction shown by the arrow in the drawing. Therefore, as shown in FIG. 4, the connecting elongated hole 51 moves to the left side in the drawing, and the pin 52 which is not moved is positioned at the right end of such connecting elongated hole 51. That is, the second end located at the right end of the connection elongated hole 51.
The base end 49 of the bar 47 and the other end side 5 of the release petal 28
The clearance U is eliminated and the pin 52 of 0 is brought into contact with and engaged with the pin 52.
In this way, even if the brake petal 19 is pressed,
Due to the existence of the connecting elongated hole 51, there is no change in the state of the release petal 28, and the release petal 28 retains the previously unpressed posture.

Now, during such a braking,
When the release petal 28 is pressed, the result is as follows. That is, the pin 52 on the other end 50 of the release petal 28
And the base end 49 of the second bar 47 are in abutting engagement with each other, so that the second bar 47 is moved by the arrow W in the drawing as shown in FIG. Since the link member 42 is pulled in the direction and moves, and the link member 42 rotates in the X direction indicated by the arrow in the figure, the first bar 39 moves in the Y direction indicated by the arrow in the figure.
Therefore, as shown in FIG. 5, the brake petal 19 returns to the original state in which the brake petal 19 is not pressed down via the pin 32. Along with this, the pin 32, the connecting member 21, the left and right rods 22,
Via the brake bar 24 and the like (see also FIG. 1), the caster 3 is pressed against the brake member 25 and the brake is released. It should be noted that the release petal 28 swings back to the original unpressed state by the urging force of the spring 46 by removing the foot after the fact.

Now, like this, this release petal 28
The second bar 47, the link member 42, and the like can be moved, rotated, etc. by pressing the brake petal 19 only when the brake petal 19 is pressed. On the other hand, even if the release petal 28 is pressed when the brake petal 19 is not pressed, as shown in FIG.
However, since the interval U exists between the base end 49 of the second bar 47 located at the left end in the drawing of the connection elongated hole 51 and located at the right end of the connection elongated hole 51, the second bar 47 is formed. Has not moved and remains immobile. As described above, even if the release petal 28 is pushed down at all times when the brake petal 19 is not pushed down, the link member 42 and other members are not driven and rotated or moved. Absent.

In the illustrated embodiment, as shown in FIG. 2 and as described above, the brake devices with the release petals 28 are provided in front of and behind the cart body 1 and operate in conjunction with each other. It has become. Therefore, in the braking state, when the release petal 28 of one of the front and rear braking devices is pressed, the second bar 47 on one side is pulled in the W direction shown by the arrow in the figure and moved, and the link member 42 is moved by the X shown by the arrow in the figure. Rotate in the direction. As a result, first, the first bar 39 moves in the Y direction shown by the arrow in the figure,
The brake of one of the braking devices is released, and the second bar 47 of the other braking device is changed to the W indicated by the arrow in the figure.
The release petal 28 of the other brake device is also in the pressed state. Along with this, the first bar 39 of the other brake device also moves in the Y direction shown by the arrow in the figure, and the brake of the other brake device is also released. As described above, in the illustrated embodiment, the front and rear brake devices with the release petals 28 are interlocked.

The present invention has been described above. Then it becomes as follows. As shown in FIG. 1 and the like, this cart braking device includes a connecting member 21 pivotally attached to the other end 31 of the brake petal 19 and a connecting member 21 between the brake petal 19 and the brake member 25. The attached left and right rods 22, the brake bars 24 positioned between the left and right rods 22 and both brake members 25,
Is arranged. As shown in FIG. 3, FIG. 4, FIG. 5, etc., the left and right rods 22 have a structure in which they are vertically movable in a vertical guide groove 33 of the holder 23. Therefore, when the brake is applied from the state where the casters 3 are movable, the operation is as follows.

First, from the state shown in FIGS. 1 and 3, the free end side, that is, the one end side 27 of the brake petal 19 is pushed down,
The brake petal 19 is swung about the left and right shafts 26. Then, the pin 3 is attached to the other end 31 of the brake petal 19.
The left and right rods 2 through the connecting member 21 pivotally attached at 2.
2 is guided by the upper and lower guide grooves 33 of the holder 23, and first moves from the descending position A until then to the highest rising position. As shown in FIG. 4, the left and right rods 22 have moved to the quasi-elevated position B after passing through the highest position, that is, the center of the left and right rods 22, the connecting member 21, the pin 32, and the other end 31 of the brake petal 19. Etc. through the vertical straight line, the opposite side to the center of the pin 32 (left side in the drawing)
The other end 31 of the brake petal 19 comes into contact with the stopper 20 and its swinging stops.
It should be noted that each of the operations developed around the vertical movement of the left and right rods 22 between the lowered position A, the most raised position, and the semi-elevated position B guides the left and right rods 22 in the vertical guide grooves 33 of the holder 23. As a result, it is carried out extremely stably.

Referring now to FIG. 1, both brake bars 24
Had taken the brake releasing posture C because the left and right rods 22 were in the descending position A until then, but the left and right rods 22 are displaced to the quasi-elevating position B after passing through the maximum ascending position in this way. One end 34 on the 22 side is pushed up, and the other end 35 takes a braking posture D for pushing down the brake member 25 (see the imaginary line display in FIG. 1). Therefore, since both brake bars 24 have been in the brake release posture C until then, the brake members 25 are urged upward by the springs 36, respectively.
Although it was in the brake release position separated from the brake bar 24, the brake bar 24 is pushed by the other end 35 of the brake bar 24 against the urging force of the spring 36 because the both brake bars 24 take the braking posture D in this way. It is displaced to the position E (see the solid line in FIG. 1), and is pressed against the left and right casters 3, respectively. In this way, braking of the rotation of the casters 3 is performed. Since the vertical axis 38 of the brake member 25 is provided with a rotation stopper so as not to rotate around the axis, swing vibration of the caster 3 is also prevented at the same time.

When the brake is applied as shown in FIG. 4, the brake state is maintained thereafter until the brake is released by the release petal 28 as shown in FIG. That is, the both brake members 25 are constantly urged by the urging force of the springs 36 from the lower brake position E toward the upper brake release position, and as a result, both brake bars 24 are released from the brake posture D. Although it is always urged to the posture C, such a force is applied to the left and right rods 22 and the connecting member 2.
1, does not act on the brake petals 19 and the like.

That is, in the braking state, as shown in FIG. 4, the other end 31 of the brake petal 19 comes into contact with the stopper 20, so that the left and right rods 22 are in the semi-elevated position B after passing through the highest position. In addition to being fixedly positioned, the center of the left and right rods 22, the connecting member 21, the pin 32, the other end 31 of the brake petal 19 and the like, after undergoing a vertical straight line state, are opposite to those around the pin 32. It is fixedly positioned in a state of being slightly bent to the side (left side in the drawing). Therefore, the force from the spring 36, the brake member 25, and the brake bar 24 is blocked by the fixed positioning by the stopper 20, and the left and right rods 22 are moved to the lowered position A and the brake petal 19 is stopped.
The force to return to the original state before pressing does not act. On the contrary, such left and right rods 22, connecting members 21, and pins 3
2. By the fixed positioning by the stopper 20 such as the brake petal 19 and the like, the both brake bars 24 are positioned in the braking posture D and the both brake members 25 are fixedly positioned at the brake position E against the biasing force of the spring 36. ing. Therefore, even if the foot is removed from the one end side 27 side which is the free end of the brake petal 19, both brake members 2
The braking state in which 5 is pressed against the casters 3 is
It is locked and held as it is.

Now, in this cart braking device, the following first, second and third conditions are obtained. First
In this brake device, the connecting member 21, the left and right rods 22, the both brake bars 24, and the like are sequentially arranged between the brake petal 19 and both brake members 25, and the left and right rods 22 are vertically moved in the vertical guide grooves 33 of the holder 23. The structure is movably guided, the number of parts is reduced, and the structure is simplified. That is, as compared with the conventional example of this kind shown in FIG. 6, a plurality of parts are molded and integrated, the number of links, connections, attachment points, etc. are reduced, and motion transmission between the brake petal 19 and both brake members 25 is transmitted. The number of parts is reduced and the structure is simplified, such as the mechanism being simplified.

Second, since the number of parts of the brake device is reduced and the structure thereof is simplified,
It is easy and easy to process, align, install, and adjust when manufacturing and assembling. That is, as in the case of the conventional example of this kind shown in FIG. 6, extremely high precision is required for processing, alignment, attachment, adjustment, etc., and it takes a long time, but these are used in a short time. Easy and easy to implement.

Thirdly, this brake device has a reduced number of parts and a simplified structure. And the links, connections, installation points, etc. are reduced, and the brake petals 19
The motion transmission mechanism between the two brake members 25 and 25 is simplified, and each motion is extremely stably developed by the left and right rods 22 being guided and held by the upper and lower guide grooves 33 of the holder 23. Therefore, as compared with the conventional example of this kind shown in FIG. 6, the overall operation is more accurate and the number of failures is smaller.

First, in the illustrated embodiment, such a braking device is provided in front of and behind the cart body 1 and is interlocked with each other. The tip 41 and the tip 48 of the second bar 47 were pivotally attached or otherwise attached to different ends of the link member 42, respectively. However, regardless of such an illustrated embodiment, with respect to the front and rear brake devices,
The first bar 39 of the one brake device and the second bar 47 of the other brake device are configured by a single common bar, and the second bar 47 of the one brake device and the other brake device are configured. The first bar 39 may also be configured by a single common bar. In this case, the centers of the two bars thus shared serve as the tip 41 of the first bar 39 and the tip 48 of the second bar 47, respectively.
It is attached to the end of the link member 42 by pivotal attachment using a pin and a pin hole or the like.

Secondly, in the illustrated embodiment, the brake bar 24 and the brake member 25 are provided corresponding to the casters 3 on both the left and right sides, and thus the pair of left and right brake members 25 is provided. Brake devices provided with are provided in front of and behind the cart body 1, respectively,
Although they are interlocked with each other, the present invention is not limited to this, and is applicable to, for example, the following braking device. That is, each of the brake bar 24 and the brake member 25 is composed of only one, and a brake device of a type that applies a brake to only one of the left and right casters 3, and only one of the front and rear of the cart body 1,
The present invention is of course applicable to a type in which a brake device is provided, a brake device provided in front and rear of the cart main body 1, but not interlocked between the front and rear, and a brake device in which these are combined. Is.

[0039]

The braking device for a cart according to the present invention is
As described above, the structure in which the connecting member, the left and right rods, the brake bar, and the like are sequentially arranged between the brake petal and the brake member, and the left and right rods are guided by the upper and lower guide grooves of the holder, Be effective.

First, the cost is excellent. That is, as compared with the above-described conventional example of this type, the number of parts is reduced, the configuration thereof is simplified, and the cost of parts is reduced.

Secondly, the number of assembling steps is also reduced. That is, since the number of parts is reduced and the configuration is simplified,
The processing, positioning, attachment, adjustment, etc. are simple and easy, and do not require a long time.

Thirdly, the quality is also improved. That is, since the number of parts is reduced and the configuration is simplified, the operation is accurate and there are few failures, and the quality is superior to the above-described conventional example of this type. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a front explanatory view showing an embodiment of a brake device for a cart according to the present invention.

FIG. 2 is a bottom view of the embodiment.

FIG. 3 is a side view of the embodiment, showing a caster movable.

FIG. 4 is a side view for explaining the embodiment, showing a state during braking.

FIG. 5 is a side view for explaining the embodiment, showing the state when the brake is released.

FIG. 6 shows a braking device for a conventional cart of this type,
(1) is a front explanatory view, and (2) is a side view.

FIG. 7 is a schematic perspective view of a cart.

[Explanation of symbols]

 1 Cart main body 3 Caster 19 Brake petal 20 Stopper 21 Connecting member 22 Left and right rod 23 Holder 24 Brake bar 25 Brake member 26 Left and right shaft 31 Other end side 32 Pin 33 Vertical guide groove 34 One end 35 Other end 36 Spring A Descent position B Semi-elevation Position C Brake release posture D Brake posture E Brake position

Claims (1)

[Claims] 1. A substantially L-shaped member, the center of which is attached to the vicinity of the lower front and rear ends of the cart body so as to be swingable by horizontal left and right shafts,
Brake petal that can be pressed with one end as a free end,
A stopper that can come into contact with the other end of the brake petal and has a swing limit, a connecting member whose one end is pivotally attached to the other end of the brake petal by a horizontal pin, and another connecting member. A left and right rod that is attached to an end and can move up and down between a descending position, a maximum ascending position, and a semi-elevating position; a holder provided with an up-and-down guide groove that guides the left and right rods; The central portion is pivotably supported downward, one end is located at the left and right rods and the other end is located at the brake member. First, when the left and right rods are at the lowered position, the other end is A brake release posture that does not act on the brake member, and a brake posture in which the one end is pushed up by the left and right rods and the other end pushes down the brake member when the left and right rods are in the semi-elevated position. In addition, a brake bar capable of swinging displacement, a caster attached to the lower part of the cart body, and a spring urged upward while being interposed between the other end of the brake bar and the caster. When the brake bar is in the brake release position, the upper brake release position spaced apart from the lower caster with a distance, and next, when the brake bar is in the brake release position, A brake device for a cart, comprising: a brake member which is pushed down to the caster side at the other end and is movable up and down at a lower brake position in pressure contact with the caster.