JPH0891222A - Brake equipment for cart - Google Patents

Abstract

PURPOSE: To provide brake equipment for a cart which firstly reduces parts in number, simplifies its constitution, and thereby is excellent in cost secondly reduces assembling manhours in such a way that processing, aligning, installation, adjustment and the like are simple, easy and of no time consuming, and thirdly its operation is accurate, and is minimized in trouble. CONSTITUTION: In the brake equipment, a connecting member, a right and a left rod 21 fixedly installed onto the connecting member, and rod cut-out sections 22 formed at the end sections of the right and left rods 21 are interposed between a brake pedal and a brake member 23. The rod cut-out sections 22 are so designed that they can be rotated so as to be displaced between a brake releasing attitude A where each cut-out portion 34 exerts no action to the brake member 23 in response to the brake member 23 in the subordinate position, and a braking attitude B where a cut-out remaining section pushes the brake member 23 down. By this constitution, the brake is applied/released by letting the brake member 23 be pressed into contact with a caster 3, and be parted from the caster.

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. 7A and 7B show a conventional brake device for a cart of this type. FIG. 1A is a front view and FIG. 2B is a side view. As shown in the same figure, in this type of brake device, a brake member 4 such as a brake shoe is pressed against and separated from a caster 3 attached below the floor surface 2 of the cart body 1, whereby the brake and the brake are braked. It has been canceled. Then, the brake petals 6 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.
Or by pressing the free end side of the release petal 7,
The brake member 4 is pressed against and separated from the caster 3, and the brake and the brake are 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. A connecting member 9 whose lower end is pivotally attached to the upper end of the connecting member 9, an upper end of the connecting member 9 is pivotally attached to a pin 10, and an arm 12 having a cantilever structure capable of swinging up and down about a fulcrum 11. The adjusting screw 13 provided upright on the tip 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. 15 is a brake member 4
Is a spring that always urges 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 pushes the urging force of the spring 15. It is pushed down against and is pressed against the caster 3, and the brake is applied.

The other end of the brake petal 6, the pin 8, the connecting member 9 and the like are vertically bent from the state of being bent to the right around the pin 8 as shown by the solid line in FIG. 7B. After slightly passing the straight line state (state in which the arm 12, the adjusting screw 13 and the like are at the highest position), the other end of the brake petal 6 comes into contact with a stopper (not shown), so that when braking, As indicated by an imaginary line in (2) of FIG. 7, it is slightly bent to the left side on the opposite side. In this way, the spring 1 that constantly biases the above-mentioned brake member 4 upward because it is in a slightly bent state as shown by an imaginary line passing through the vertical straight line state.
Due to the biasing force of 5, the force for returning the brake petal 6 to the original solid line display state via the lever 14, 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 member 4 does not move on the caster 3 side.
The brake condition that was pressed against was locked, and the brake condition was retained. 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 such circumstances, the present invention has been made to solve the problems of the above-mentioned conventional example, and a connecting member, left and right rods, rod cutouts and rods are provided between the brake petal and the brake member. By adopting the structure in which the protrusions and the like are arranged, firstly, the number of parts is reduced and the configuration is simplified, and secondly, the assembly is easy and easy.
Thirdly, it is an object of the invention to propose a braking device for a cart, which is accurate in operation and has few failures.

[0007]

The technical means of the present invention for achieving this object are as follows. First, claim 1
About: That is, the braking device of this cart has the following brake petals, connecting members, left and right rods, rod cutouts, casters, brake members, and the like. 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 connecting member pivotally attached to the other end by a horizontal pin, and left and right rods that are attached and fixed to the connecting member and are rotatably held around the shaft by a holder under the cart body. Further, it has the following rod notch, caster, brake member and the like.

The rod cutouts are cutouts formed at the ends of the left and right rods, and the cutouts correspond to a lower brake member and do not act on the brake members. It can be rotated and displaced in a braking posture in which the member is pushed down. The caster is attached below the cart body. The brake member is urged upward while being interposed between the rod cutouts at the ends of the left and right rods and the casters.
When the rod cutout is in the brake release position, the upper brake release position is spaced apart from the caster below, and next, when the rod cutout is in the brake position, the rod cutout is in the brake release position. It is possible to move up and down to the lower brake position which is pushed down to the caster side by the pressure contact with and is pressed against the caster.

Next, claim 2 is as follows. That is, the cart braking device according to claim 1, wherein a rod protrusion is provided in place of the rod notch, and the rod protrusion is partially provided at an end of the left and right rods. It is pivotally displaceable between a brake releasing posture that does not affect the lower brake member and a brake posture that presses the brake member to press it down. Therefore, the brake member is in the brake release position when the rod protrusion is in the brake release posture, and is in the brake position by the pressure contact of the rod protrusion when the rod protrusion is in the brake posture.

[0010]

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,
In the first aspect, the rod notch portion is used, and in the second aspect, the rod protruding portion and the like are arranged. Then, when the brake is applied, when the brake petal is pushed down, the left and right rods rotate about their axes via the connecting member. Therefore, since the rod cutouts and the rod protrusions of the left and right rods are rotationally displaced from the brake release posture to the brake posture, the brake member is pushed down by the rod cutouts and the rod protrusions against the urging force, and the brake is released. Displace from the position to the brake position and press against the caster. In this way,
The brake is applied.

Therefore, firstly, the brake device for this cart has a structure in which a connecting member, left and right rods, rod cutouts, rod projections, and the like are arranged between the brake petal and the brake member. The number is reduced and the configuration is simplified. Secondly, since the number of parts is reduced and the structure is simplified, processing, alignment, attachment, adjustment, etc., at the time of assembly are easy and easy. Thirdly, the number of parts is reduced and the structure is simplified. Especially, since the left and right rods are rotatably held by the holder, the operation is stable and accurate, and there are few failures.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
1 shows an embodiment of the present invention. (1) of FIG. 1 is a front explanatory view when the casters are movable or when the brake is released, (2) of FIG. 1 is a front explanatory view of when the brake is applied, and FIG. 2 is a bottom explanatory view. 3 is a side explanatory view when the casters are movable, FIG. 4 is a side explanatory view when the brake is applied, and FIG. 5 is a side explanatory view when the brake is released.
6A and 6B show another embodiment of the present invention. FIG. 6A is a front explanatory view when the casters are movable or the brake is released, and FIG. 6B is a front explanatory view when the brake is applied. FIG. 8 is a schematic perspective view of the cart.

First, as shown in FIG. 8, in a cart, the cart body 1 has, for example, a box shape, and wheels are provided with casters 3 under the four corners of a floor surface 2. For example, in a cabin of an aircraft or a vehicle of a bullet train. Is used by the crew to provide food and drink services to passengers. The braking device for a cart according to the embodiment shown in FIGS. 1, 2, 3, 4, and 5 includes a brake petal 19, a connecting member 20, a left and right rod 21, a rod cutout 22, and a brake member. 23, etc. Hereinafter, these will be described in order.

As shown in FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 8, etc., the brake petal 19 has a substantially L shape, and its center is near the lower front and rear ends of the floor surface 2 of the cart body 1. Further, it is swingably attached by a horizontal left and right shaft 24, and one end side 25 becomes a free end and can be pushed down. That is, the brake petal 19 is installed together with the release petal 26, which will be described later,
A left and right shaft 24 that is horizontally held below the floor 2 is swingably mounted up and down, and one end side 25 is stepped on with a foot, so that the state shown in FIG. It is pressed in the state shown. In FIG. 2, FIG. 3, FIG. 4, FIG. 5, etc., 27 is a petal bracket, and this petal bracket 27 is fixed below the floor surface 2 of the cart body 1, holds the left and right shafts 24, and stops 28, 29. Both stoppers 28 and 29 are attached to the brake petal 1.
9 are arranged on both sides of the other end side 30 (both left and right sides in the drawing) of the brake petal 19 so as to be in contact with the other end side 30 of the brake petal 19. The swing limit is regulated.

Next, as shown in FIG. 3, FIG. 4, FIG. 5, etc., one end of the connecting member 20 is pivotally attached to the other end 30 of the brake petal 19 by a horizontal pin 31. . That is, the connecting member 20 is composed of a link plate for connection, and the end on the other end side 30 of the brake petal 19 is pivotally attached to a lower end portion thereof by a horizontal pin 31 and is driven by the brake petal 19. , It is possible to swing on a vertical surface.

Next, the left and right rods 21 will be described with reference to FIGS.
As shown in FIG. 1 and the like, it is attached and fixed to the other end portion on the upper side of such a connecting member 20, and as shown in FIGS. It is rotatably held around. That is, a holder 32, which is a spacer, is fixed below the floor surface 2 of the cart body 1. In the illustrated example, the holder 32 is arranged on each of the left and right casters 3. And
With such through-hole-shaped slot 33 of both holders 32,
Both ends of the inserted right and left rods 21 are rotatably held. Therefore, the left and right rods 21 are immovable in the axial direction and are rotatable around their axes.

As shown in FIG. 1, the rod notch 22 is notched at the ends of the left and right rods 21, and the notch 34 corresponds to the lower brake member 23 and acts on the brake member 23. With no brake release posture A,
The notch remaining portion 35 is pivotally displaceable to a braking posture B in which the notch remaining portion 35 is pressed against the brake member 23 and pushes down the brake member 23. That is, in the illustrated example, rod notches 22 are cut into semicircular cross sections at both ends of the left and right rods 21 protruding from the slot 33 of the holder 32.
Notched. The rod notch 22 is shown in FIG.
As shown in (1) of FIG.
Is in full contact with the lower brake member 23, and as shown in FIG. 1 (2), a portion of the cutout residual portion 35 that is slightly bent, that is, the cutout residual portion 35 has the largest diameter. The position where is marked can be rotationally displaced to the brake posture B in which the lower brake member 23 is pressed.

The brake members 23 are respectively arranged on the left and right sides corresponding to the left and right casters 3 in the illustrated example. Then, as shown in FIG. 1, such a brake member 23 has a rod notch 22 of the upper left and right rods 21.
It is urged upward by a spring (not shown) while being interposed between the end portion formed with and the lower caster 3. The brake member 23 in the illustrated example has an inverted T-shaped cross section, and includes a lower flat brake shoe 36 made of rubber excellent in frictional force, and an upper vertical axis 37. In the brake member 23, the rod notch portion 22 has the shape (1) in FIG.
When the brake release posture A shown in the figure is taken, the upper brake release position C, which is spaced apart from the lower caster 3 at a distance, is taken. Next, when the rod notch 22 takes the braking posture B shown in FIG. 1B, the brake member 23 is pushed down to the caster 3 side by pressure contact with the notch remaining portion 35 of the rod notch 22, The lower brake position D pressed against the caster 3 is taken. In this way, both brake members 23 can move up and down between the upper brake release position C and the lower brake position D.

The cart brake device comprises the brake petal 19, the connecting member 20, the left and right rods 21, the rod notch 22, the brake member 23, etc. as described above. In the illustrated embodiment, such brake devices are provided in front of and behind the cart body 1.
Therefore, in this one cart, front and rear two brake petals 19, front and rear two connecting members 20, front and rear two left and right rods 21, front and rear four rod notches 22, and front and rear four brakes are provided. Members 23, etc. are provided.

Now, as shown in FIG. 2, the brake devices provided at the front and the rear are designed to operate in conjunction with each other. That is, the front and rear brake petals 1
As shown in FIGS. 3, 4 and 5, the connecting member 20 is pivotally attached to the other end side 30 of the connector 9 by a horizontal pin 31, and the base end 39 of the first bar 38 is The forked portion is locked and attached. As shown in FIG. 2, each of the first bars 38 is movable along the axial direction under the floor surface 2 of the cart body 1, and the tips 40 thereof are respectively different ends of the link member 41. It is attached to the part by means of pivotal attachment or the like using pins and pin holes. In the illustrated example, the first bar 38 of one of the front and rear brake devices and the second bar 42 of the other brake device, which will be described later, are configured by a single bar. The center of each of the two bars formed is the tip 4 of the first bar 38.
0 and the tip 43 of the second bar 42, and the link member 41
It is attached to the end of the by pivoting or the like.

As shown in FIG. 2, the link member 41 is pivotally attached to the lower center of the floor surface 2 of the cart body 1 by a vertical pin 44 so that it can be horizontally rotated. Therefore, when either one of the front and rear brake devices is pressed on the brake petal 19, one of the first bars 38 is pressed by, for example, S indicated by an arrow in the figure.
The link member 41 rotates in the T direction shown by the arrow in the drawing, and the first bar 38 on the other side also moves in the S direction shown by the arrow in the drawing, so that the other brake device The brake petal 19 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 braked by the brake member 23. To be in a state.

Next, the release petal 26 will be described in detail with reference to FIGS. 2, 3, 4, 5, and 8. The release petal 26 has a substantially L-shape, and the center thereof is swingably attached to a lower left and right end of the floor surface 2 of the cart body 1 by a horizontal left and right shaft 45, and one end side 46 is a free end. It can be pressed. That is, the release petal 26 is provided together with the brake petal 19 described above, and the left and right shafts 45 thereof are held by the petal bracket 27, so that the state shown in FIGS. 3 and 4 changes to the state shown in FIG. It can be pressed. The release petal 26 is provided with a spring 47 for constantly urging the release petal 26 upward. The above-described pressing is performed against the urging force of the spring 47, and one end side of the release petal 26 is provided. When the foot is removed from 46, the release petal 26 immediately returns to its original undepressed state by the biasing force of the spring 47.

Then, as shown in FIG. 2, the second bar 42
Is arranged parallel to the above-mentioned first bar 38 of the brake device so that it can move below the floor surface 2 of the cart body 1 along its axial direction, and the tip 43 of the second bar 42 has the above-mentioned link member. It is attached to one end of 41 by pivotal attachment or the like. The tip end 43 of the second bar 42 is the first bar 38 of the brake device among the both ends of the link member 41.
Is attached to the end that is not attached.
In the illustrated example, as described above, the second bar 42 of one of the front and rear braking devices and the first bar of the other braking device are arranged.
The bar 38 and the bar 38 are configured by a single bar, and the centers of the two bars that are made common in this way become the tip 43 of the second bar 42 and the tip 40 of the first bar 38, respectively. It is attached to the end of the link member 41 by pivotal attachment or the like.

The base end 48 of the second bar 42 and the other end 49 of the release petal 26 are set in the following relationship. 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 38, link member 41,
As shown in FIG. 4, the two are brought into abutting engagement with each other via the second bar 42, and when the release petal 26 is pushed down in this state, the two are left in abutting engagement and left side in the drawing. The second bar 42, the link member 41, and the first bar 38.
As shown in FIG. 5, the brake petals 19
Is released (at the same time, the depression of the brake petal 19 of the other braking device is also released, which will be described later).

In the illustrated example, as an example of such a configuration, as shown in FIGS. 3, 4 and 5, the second bar 42 is used.
A downward bent portion 50 is formed at the base end 48 of the
A receiving portion 51 is projectingly provided on the other end 49 of the release petal 26 at the upper end thereof. Then, the bent portion 50 on the second bar 42 side
The receiving portion 51 on the release petal 26 side can contact and separate from each other. In the figure, 52 and 53 are stoppers, and the stoppers 52 and 53 are the petal brackets 2.
7 is attached to both sides of the other end side 49 of the release petal 26 (both left and right sides in the drawing) with a space between them, and the other end side 4 of the release petal 26 is provided.
It is possible to make contact with 9 and regulate the swing limit of the release petal 26.

Now, first, the brake petal 19
When the caster 3 that is not pressed is movable, as shown in FIG. 3, the bent portion 50 on the second bar 42 side is located on the left side in the drawing, and the receiving portion 51 on the release petal 26 side is
It is located on the right side of the drawing and is in contact with the stopper 53.
The bent portion 50 and the receiving portion 51 are separated from each other, and a space U is formed.

Next, when the brake petal 19 is pushed down in this state, the first bar 38 is pulled and moved in the S direction indicated by the arrow in the figure, and the link member 41 is indicated by the arrow in the figure, as shown in FIG. The second bar 42 is rotated in the T direction shown in the figure, so that the second bar 42 is moved in the V direction shown by the arrow in the figure. Therefore, as shown in FIG. 4, the bent portion 50 on the second bar 42 side moves to the right side in the drawing and abuts and engages with the receiving portion 51 on the release petal 26 side. Will be resolved. In this way, even if the brake petal 19 is pressed down, there is no change in the state of the release petal 26 due to the existence of the interval U,
The release petal 26 remains in contact with the stopper 53, and holds the posture that has not been pressed until then.

Now, during such braking,
When the release petal 26 is pressed, the result is as follows. That is, since the receiving portion 51 on the other end side 49 of the release petal 26 and the bent portion 50 of the second bar 42 are in abutting engagement with each other as described above, as the release petal 26 is pressed and swung, The receiving portion 51 of the release petal 26 includes the second bar 42.
It moves to the left side in the drawing together with the bent portion 50 of. The other end 49 of the release petal 26 abuts the stopper 52. Now, as shown in FIG. 2, the second bar 42 is pulled and moved in the W direction shown by the arrow in the drawing, and the second bar 42 moves to the link member 4
Since 1 rotates in the X direction indicated by the arrow in the figure, the first bar 38 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 it is not pressed. At the same time, the caster 3 is pressed by the brake member 23 and the brake is released via the pin 31, the connecting member 20, the left and right rods 21, the rod cutout 22 and the like (see also FIG. 1). Release Petal 26
After that, by removing the foot, the rocking returns to the original unpressed state by the urging force of the spring 47.

Now, like this, this release petal 26
The second bar 42, the link member 41, and the like can be moved, rotated, and the like by pressing the brake petal 19 only when the brake petal 19 is pressed. On the other hand, even if the release petal 26 is depressed when the brake petal 19 is not depressed, as shown in FIG. 3, the receiving portion 51 on the release petal 26 side is always present.
However, since there is a space U between the bent portion 50 of the second bar 42 located on the right side and the left side in the drawing,
The second bar 42 does not move and remains immobile. As described above, even when the release petal 26 is pressed down at all times when the brake petal 19 is not pressed down, the link member 41 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 26 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 26 of one of the front and rear braking devices is pressed, the one second bar 42 is pulled and moved in the W direction indicated by the arrow in the figure, and the link member 41 is moved by the X indicated by the arrow in the figure. Rotate in the direction. As a result, first, the first bar 38 moves in the Y direction shown by the arrow in the figure,
The brake of one of the brake devices is released, and the second bar 42 of the other brake device is changed to the W indicated by the arrow in the figure.
The release petal 26 of the other braking device is also in the depressed state. At the same time, the first bar 38 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. Thus, in the illustrated embodiment, the front and rear brake devices with the release petals 26 are interlocked.

The present invention has been described above. Then it becomes as follows. As shown in FIG. 1, FIG. 3, FIG. 4, FIG. 5, etc., this cart braking device is pivotally attached to the other end 30 of the brake petal 19 between the brake petal 19 and the brake member 23. A connecting member 20,
Left and right rods 21 mounted and fixed to the connecting member 20, and rod cutouts 22 formed by cutting out at the ends of the left and right rods 21.
And are arranged. 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 FIG. 1 (1) and FIG. 3, the free end side of the brake petal 19, that is, the one end side 25.
Is pressed to swing the brake petal 19 around the left and right shafts 24. Then, the other end 30 of the brake petal 19
The connecting member 20 pivotally attached to the pin 31 is displaced from the tilted posture up to that time to the vertical posture as shown in FIG. 4, and based on such displacement of the connecting member 20, the left and right rods 21
However, while being held by the holder 32, the holder 32 is rotated about its axis by about 45 to 90 degrees. Therefore, as shown in FIG. 1 (2), the rod notch 22 formed by notching at the ends of the left and right rods 21 is rotationally displaced from the brake release posture A until then to the brake posture B. Therefore, the brake member 23 is in the brake release position C in which the rod notch 22 has been in the brake releasing posture A until then and is biased upward and away from the caster 3. Since the brake posture B has been taken, it is pushed down by the notch remaining portion 35 of the rod notch portion 22 against the biasing force, displaced to the brake position D, and pressed against the caster 3. In this way, the brake for the rotation of the casters 3 is implemented. Note that the vertical axis 37 of the brake member 23 is provided with a rotation stopper so as not to rotate around the axis, so that the caster 3
The swinging vibration of is also stopped at the same time.

When the brake is applied as shown in FIG. 4 and FIG. 1 (2), the brake is released by the release petal 26 after the fact as shown in FIG. The brake state is maintained until. That is,
The brake member 23 is held at the lower brake position D against the urging force of a spring or the like which normally urges the brake member 23 upward, but the rod notch 22 is also held by the urging force of such a spring or the like. The brake posture B is maintained. That is, the rod notch 22 and the left and right rods 21
Is pressed by such an urging force, and is immovably positioned in the groove hole 33 of the holder 32 without rotating, and thus holds the brake posture B shown in FIG. Therefore, the brake member 23 is also held at the brake position D, the connecting member 20 also maintains the vertical posture, and the brake petal 19 also remains pressed down. Therefore, even if the foot is removed from the one end side 25 side which is the free end of the brake petal 19, the brake state in which both brake members 23 are pressed against the casters 3 is locked and held as it is.

Now, in this cart braking device, the following first, second and third conditions are obtained. First
In addition, this brake device has a structure in which the connecting member 20, the left and right rods 21, the rod cutouts 22 and the like are sequentially arranged between the brake petal 19 and both brake members 23, so that the number of parts is reduced and the configuration is also reduced. It has been simplified. That is, compared to the conventional example of this kind shown in FIG. 7, the number of parts is reduced, such as reduction of links, connection points, and attachment points and simplification of the motion transmission mechanism between the brake petal 19 and the brake member 23. , Its configuration is also 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 conventional example of this kind shown in FIG. 7, extremely high precision is required for machining, positioning, mounting, adjustment, etc., and it takes a long time as compared with a short time. It's done easily and easily.

Thirdly, this brake device has a reduced number of parts and a simplified structure. Further, the number of links, connecting points, and mounting points are reduced, and the motion transmission mechanism between the brake petal 19 and both brake members 22 is simplified.
It is deployed in a very stable manner centering on the rotation in the slot 33 of the. Therefore, as compared with the conventional example of this kind shown in FIG. 7, the overall operation is more accurate and there are less failures.

First, in the illustrated embodiment, the left and right rods 21 and the brake member 23 are provided corresponding to the left and right casters 3, respectively. 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 rod notch 22 and the brake member 23 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.

Secondly, FIG. 6 shows another embodiment of the present invention. Further, in the cart brake device of FIG. 6, unlike the embodiment shown in FIG. 1 and the like described above, the rod protrusion 54 is used instead of the rod notch 22.
Is provided. Then, the rod protrusion 54 is
A brake release posture A that is formed so as to partially project at the ends of the left and right rods 21 and does not contact the lower brake member 23 and does not act on the brake member 23, and a brake that presses the brake member 23 to press it down. Posture B
In addition, it can be rotated and displaced.

That is, the rod protruding portion 54 of the embodiment shown in FIG. 6 is also formed at the end portions of the left and right rods 21 protruding from the slot 33 of the holder 32 in accordance with the rod notched portion 22 described above. Left and right rod 2 unlike part 22
On the contrary, it is additionally formed on the outer periphery of the end portions of the left and right rods 21 so as to partially increase the diameter without notching the end portion of No. 1 and has a substantially arc-shaped cross section in the illustrated example. As shown in FIG. 6A, the rod protrusion 54 has a brake release posture A that does not contact the lower brake member 23 (in this case, the rod protrusions 54 at the ends of the left and right rods 21 are formed). The peripheral surface not contacting the brake member 23 comes in contact with the brake member 23), and as shown in FIG. 6B, the brake posture B is pressed down by pressing the lower brake member 23 (in this case, the end portions of the left and right rods 21). Rod projection 54
The peripheral surface on which is not formed is located on the upper side or the like), and can be rotationally displaced. In the cart brake device of the embodiment of FIG. 6, the brake member 23 is
When the rod protrusion 54 is in the brake release posture A, it is in the brake release position C, and when the rod protrusion 54 is in the brake posture B, it is in the brake position D due to the pressure contact of the rod protrusion 54. It should be noted that the description of other configurations, functions, operations, etc. regarding the embodiment of FIG.
Since the same applies to the above-described embodiments, the description thereof will be omitted.

[0040]

The braking device for a cart according to the present invention is
As described above, the following effects are exhibited by adopting the structure in which the connecting member, the left and right rods, the rod cutout portion, the rod protruding portion, and the like are arranged between the brake petal and the brake member.

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. Therefore, the number of assembling steps is reduced as compared with the conventional example of this kind described above.

Thirdly, the quality is 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 of an embodiment of a cart brake device according to the present invention, FIG. 1 (1) shows a caster movable and brake released, and FIG. 2 (2) shows a brake.

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 is a front explanatory view of another embodiment of the present invention,
The figure (1) shows when the casters are movable and the brake is released, and the figure (2) shows when the brake is applied.

FIG. 7 shows a braking device for a conventional cart of this type,
(1) is a front explanatory view, and (2) is a side view.

FIG. 8 is a schematic perspective view of a cart.

[Explanation of symbols]

 1 Cart Main Body 3 Caster 19 Brake Petal 20 Connecting Member 21 Left and Right Rod 22 Rod Cutout 23 Brake Member 24 Left and Right Shaft 25 One End Side 30 Other End Side 31 Pin 32 Holder 34 Cutout Part 35 Cutout Remaining Part 54 Rod Projection A B Brake posture C Brake release position D Brake position

Claims (2)

[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,
A brake petal that can be pressed down with one end being a free end, a connecting member pivotally attached to the other end of the brake petal by a horizontal pin, and fixed to the connecting member and attached to the bottom of the cart body. A left and right rod rotatably held by a holder about its axis, and a notch formed at the end of the left and right rod, and the notch portion corresponds to a lower brake member and does not act on the brake member. A rod notch capable of rotational displacement, a caster attached below the cart body, and a rod notch at the ends of the left and right rods in a releasing posture and a braking posture in which the notch remaining portion pushes down the brake member. The casters are urged upward while being interposed between the casters. First, when the rod notch portion takes the brake releasing posture, it is separated from the casters below with a gap. Of the brake release position, then, if the rod notch takes a braking stance, to the lower brake position pressed against the depressed the casters to the caster side of the downwardly by pressure contact of the rod notch,
A brake device for a cart, comprising: the brake member that can move up and down. 2. The cart braking device according to claim 1, wherein a rod protrusion is provided in place of the rod notch, and the rod protrusion is formed so as to partially protrude at end portions of the left and right rods. , The brake releasing posture in which the lower brake member does not act and the brake posture in which the brake member is pressed and pressed to be pushed down, and the rod protruding portion of the brake member is in the brake releasing posture. The brake device for a cart is characterized in that it is in a brake release position when the rod projection is taken, and is in a brake position by pressing the rod projection when the rod projection takes a braking posture.